const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');
const flush = () => new Promise(setImmediate);

async function customerPage(pageOptions = {}){
    const storageValues = pageOptions.storage || {};
    if(!storageValues['baiyue-visitor-key']) storageValues['baiyue-visitor-key']='1'.repeat(64);
    const tabValues = pageOptions.tabStorage || {};
    function testStorage(values){return {
        getItem:key=>values[key] ?? null,setItem:(key,value)=>{values[key]=String(value);},
        removeItem:key=>{delete values[key];},key:index=>Object.keys(values)[index] ?? null,
        get length(){return Object.keys(values).length;}
    };}
    const elements = new Map(), listeners = {}, windowListeners = {}, viewportListeners = {}, intervals = new Map(), timers = new Map(), calls = [], hooks = {};
    let intervalId = 0, timerId = 0, nextConvId = 1;
    let voiceOptions;
    class Element {
        constructor(){
            this.children = []; this.attributes = {}; this.value = ''; this.style = {};
            this.className = ''; this.dataset = {}; this.scrollHeight = 300; this.clientHeight = 300; this.scrollTop = 0;
            this.listeners = {}; this.focusCalls = []; this.isConnected = true;
            this.classList = {
                contains: name => this.className.split(' ').includes(name),
                add: name => { this.className += ' '+name; },
                remove: name => { this.className = this.className.split(' ').filter(value => value !== name).join(' '); },
                toggle: (name, on) => { this.classList.remove(name); if(on) this.classList.add(name); },
            };
        }
        set innerHTML(value){ this.html = value; this.children = []; }
        get innerHTML(){ return this.html || ''; }
        set textContent(value){ this.text = value; this.html = ''; this.children = []; }
        get textContent(){ return (this.text || this.innerText || this.html || '')+this.children.map(child => child.textContent).join(''); }
        setAttribute(name, value){ this.attributes[name] = value; }
        removeAttribute(name){ delete this.attributes[name]; }
        getAttribute(name){ return this.attributes[name]; }
        addEventListener(name, callback){ this.listeners[name] = callback; }
        click(){ if(this.disabled) return; if(this.onclick) return this.onclick(); if(this.listeners.click) return this.listeners.click({target:this}); }
        appendChild(child){ child.parent = this; this.children.push(child); }
        append(...children){ children.forEach(child => this.appendChild(child)); }
        contains(target){ return this === target || this.children.some(child=>child.contains(target)); }
        focus(options){ this.focusCalls.push(options); document.activeElement=this; if(this.listeners.focus) this.listeners.focus(); }
        blur(){ if(document.activeElement === this){ document.activeElement=null; if(this.listeners.blur) this.listeners.blur(); } }
        select(){ document.activeElement=this; }
        querySelector(selector){
            return this.querySelectorAll(selector)[0] || null;
        }
        querySelectorAll(selector){
            const matches = element => {
                if(selector.startsWith('.')) return element.classList.contains(selector.slice(1));
                const id = selector.match(/data-human-message-id="(\d+)"/);
                return id && element.attributes['data-human-message-id'] === id[1];
            };
            return this.children.flatMap(child => [...(matches(child) ? [child] : []), ...child.querySelectorAll(selector)]);
        }
        closest(selector){
            if(selector === 'button[data-question]' && this.dataset.question) return this;
            if(selector === 'button[data-human-support]' && this.attributes['data-human-support'] != null) return this;
            return this.classList.contains(selector.slice(1)) ? this : this.parent && this.parent.closest(selector);
        }
        remove(){ this.isConnected=false; if(this.parent) this.parent.children = this.parent.children.filter(child => child !== this); }
    }
    const element = key => { if(!elements.has(key)) elements.set(key, new Element()); return elements.get(key); };
    element('emoji-panel').hidden=true;
    const quickButtons = [0, 1, 2].map(index => { const button = new Element(); button.dataset.questionIndex = String(index); return button; });
    const document = {
        body: new Element(), documentElement: {},
        getElementById: id => ['human-typing', 'imgPreview', 'recentChatWrap'].includes(id) ? null : element(id),
        querySelector: selector => element(selector), querySelectorAll: selector => selector === '[data-question-index]' ? quickButtons : [],
        createElement: () => new Element(),
        execCommand: () => pageOptions.copyResult !== false,
        addEventListener: (name, callback) => { const previous=listeners[name]; listeners[name]=previous ? (...args)=>{previous(...args);callback(...args);} : callback; },
    };
    class TestDate extends Date { constructor(...args){ super(...(args.length ? args : [2026, 9, 29, pageOptions.hour ?? 12])); } }
    let state = {status:'active', messages:[]};
    const context = vm.createContext({
        document, console, Date:TestDate, navigator:{language:'zh-CN',clipboard:pageOptions.clipboard}, AbortController, TextDecoder, confirm:() => true,
        FormData:class { append(){} },
        requestAnimationFrame:callback => callback(),
        localStorage:testStorage(storageValues),sessionStorage:testStorage(tabValues),
        window:{innerWidth:pageOptions.width || 1200, innerHeight:pageOptions.viewportHeight || pageOptions.height || 800,
            addEventListener:(name,callback) => { (windowListeners[name] ||= []).push(callback); },
            matchMedia:query => ({matches:context.window.innerWidth <= Number((query.match(/max-width:\s*(\d+)px/) || [])[1])}),
            visualViewport:pageOptions.viewportHeight ? {height:pageOptions.viewportHeight,scale:1,offsetTop:0,
                addEventListener:(name,callback) => { (viewportListeners[name] ||= []).push(callback); }} : undefined,
            prompt:() => pageOptions.offlineMessage || null},
        setInterval: callback => { const id = ++intervalId; intervals.set(id, callback); return id; },
        clearInterval:id => intervals.delete(id),
        setTimeout:(callback, delay) => { const id=++timerId; timers.set(id,{callback,delay}); return id; },
        clearTimeout:id => timers.delete(id),
        fetch: async (url, options) => {
            calls.push({url, body:options && options.body && (typeof options.body === 'string' ? JSON.parse(options.body) : options.body)});
            if(hooks[url]) return hooks[url](options);
            if(url === '/api/get_history' && pageOptions.historyFetch) return pageOptions.historyFetch();
            if(url.startsWith('/api/visitor/human/poll') && hooks.poll) return hooks.poll(url);
            if(url.startsWith('/api/get_messages') && hooks.messages) return hooks.messages(url);
            if(url === '/stream_chat'){
                let read = false;
                return {ok:true, body:{getReader:() => ({read:async () => {
                    if(read) return {done:true};
                    read = true;
                    return {value:new TextEncoder().encode('data: {"t":"测试 AI 回复"}\n\ndata: {"d":1}\n\n'), done:false};
                }})}};
            }
            const data = url === '/api/new_chat' ? {id:nextConvId++, welcome:'welcome'}
                : url === '/api/visitor/session' ? {ok:true,key:'1'.repeat(64)}
                : url === '/api/visitor/human/request' ? (pageOptions.serviceClosed ? {ok:false,closed:true} : {ok:true, session_id:7})
                : url.startsWith('/api/visitor/human/poll') ? state
                : ['/api/rate', '/api/feedback', '/api/visitor/human/send', '/api/visitor/human/close', '/api/ticket'].includes(url) || url.startsWith('/api/del_history') ? {ok:true}
                : url === '/api/get_history' ? (pageOptions.history || []) : [];
            return {ok:true, json:async () => data};
        },
    });
    for(const file of ['support.js', 'visitor.js', 'customer.js', 'drafts.js', 'voice.js', 'chat.js']){
        vm.runInContext(fs.readFileSync(path.join(__dirname, '../../static/js', file), 'utf8'), context, {filename:file});
        if(file === 'voice.js'){
            const createVoice=context.ChatVoice.create;
            context.ChatVoice.create=options => {voiceOptions=options; return createVoice(options);};
        }
    }
    listeners.DOMContentLoaded();
    await flush();
    if(pageOptions.human !== false) await context.window.showHuman();
    await flush();
    return {context, element, calls, hooks, quickButtons, voiceOptions,storage:storageValues,tabStorage:tabValues,
        documentEvent:(name,event)=>{ if(listeners[name]) listeners[name](event); },
        resize:async height => {
            context.window.innerHeight=height;
            if(context.window.visualViewport) context.window.visualViewport.height=height;
            (windowListeners.resize || []).forEach(callback => callback());
            await flush();
        },
        resizeViewport:async (height,scale=1,offsetTop=0) => {
            Object.assign(context.window.visualViewport,{height,scale,offsetTop});
            (viewportListeners.resize || []).forEach(callback => callback());
            await flush();
        },
        panViewport:async top => {
            context.window.visualViewport.offsetTop=top;
            (viewportListeners.scroll || []).forEach(callback => callback());
            await flush();
        },
        pageShow:async () => { (windowListeners.pageshow || []).forEach(callback => callback()); await flush(); },
        pageHide:async () => { (windowListeners.pagehide || []).forEach(callback => callback()); await flush(); },
        setState:value => { state=value; },
        runTimers:async delay => { for(const [id, timer] of Array.from(timers)) if(timer.delay === delay){ timers.delete(id); timer.callback(); } await flush(); },
        tick:async () => { Array.from(intervals.values()).forEach(callback => callback()); await flush(); },
        click:async button => { await button.click(); await flush(); },
    };
}

test('the final customer-visible reply is processed before closure and a rating can be submitted', async () => {
    const app = await customerPage();
    app.setState({status:'closed', messages:[{id:1, side:'agent', content:'最后一条回复'}]});
    await app.tick();
    const log = app.element('chatDom');
    assert.match(log.textContent, /最后一条回复/);
    assert.match(log.textContent, /人工客服已结束/);
    const rating = log.querySelector('.service-rating');
    assert.ok(rating);
    await rating.querySelector('.rating-choices').children[4].onclick();
    assert.match(rating.textContent, /感谢您的评价/);
    assert.equal(app.calls.find(call => call.url === '/api/rate').body.stars, 5);
    assert.equal(app.context.window.humanSid, 0);
});

function streamResponse(chunks){
    let index=0;
    return {ok:true, body:{getReader:() => ({read:async () => index < chunks.length
        ? {done:false, value:typeof chunks[index] === 'string' ? new TextEncoder().encode(chunks[index++]) : chunks[index++]}
        : {done:true}})}};
}

test('AI send preserves a newer draft typed while the conversation is being created', async () => {
    const app=await customerPage({human:false});
    let resolve;
    app.hooks['/api/new_chat']=() => new Promise(done => { resolve=done; });
    const sending=app.context.window.fillInput('第一条问题');
    app.element('input-text').value='正在补充的下一条问题';
    resolve(response({id:18,welcome:'welcome'}));
    await sending;
    await flush();
    assert.equal(app.calls.find(call => call.url === '/stream_chat').body.msg, '第一条问题');
    assert.equal(app.element('input-text').value, '正在补充的下一条问题');
});

test('switching to a quick topic discards the previous topic attachment', async () => {
    const app=await customerPage({human:false});
    app.context.window.__pendingImg='/uploads/20261029100145_6787.txt';
    app.context.window.__pendingTag='[文件]';
    await app.click(app.quickButtons[1]);
    assert.equal(app.calls.find(call => call.url === '/stream_chat').body.msg, '欧洲海运专线报价');
});

test('fragmented CRLF event streams preserve UTF-8 text and complete normally', async () => {
    const app=await customerPage({human:false});
    const bytes=new TextEncoder().encode('data: {"t":"完整中文回复"}\r\n\r\ndata: {"d":1}\r\n\r\n');
    const chunks=Array.from({length:Math.ceil(bytes.length/5)}, (_,index) => bytes.slice(index*5,index*5+5));
    app.hooks['/stream_chat']=() => streamResponse(chunks);
    await app.context.window.fillInput('请回复');
    await flush();
    assert.match(app.element('chatDom').textContent, /完整中文回复/);
    assert.equal(app.element('chatDom').querySelector('.retry-btn'), null);
    assert.equal(app.context.window.__busy, false);
});

test('a stream ending without completion retains partial text and offers retry', async () => {
    const app=await customerPage({human:false});
    app.hooks['/stream_chat']=() => streamResponse(['data: {"t":"已经收到的部分回答"}\n\n']);
    await app.context.window.fillInput('请继续说明');
    await flush();
    assert.match(app.element('chatDom').textContent, /已经收到的部分回答/);
    assert.ok(app.element('chatDom').querySelector('.retry-btn'));
    assert.equal(app.context.window.__busy, false);
});

test('rate limit responses show the server message and allow retry', async () => {
    const app=await customerPage({human:false});
    app.hooks['/stream_chat']=() => response({e:'请求太频繁，请稍后再试'},429);
    await app.context.window.fillInput('请查单');
    await flush();
    assert.match(app.element('chatDom').textContent, /请求太频繁/);
    assert.ok(app.element('chatDom').querySelector('.retry-btn'));
});

test('a stalled conversation creation times out and can be retried without losing the draft', async () => {
    const app=await customerPage({human:false});
    app.hooks['/api/new_chat']=options => new Promise((resolve,reject) => {
        if(options.signal) options.signal.addEventListener('abort', () => reject(Object.assign(new Error('timeout'), {name:'AbortError'})));
    });
    app.context.window.fillInput('请帮我查询');
    await app.runTimers(10000);
    assert.match(app.element('composer-status').textContent, /会话创建失败/);
    assert.equal(app.element('input-text').value, '请帮我查询');
    app.hooks['/api/new_chat']=() => response({id:19,welcome:'welcome'});
    await app.context.window.fillInput('请帮我查询');
    await flush();
    assert.equal(app.calls.filter(call => call.url === '/stream_chat').length,1);
});

test('history refresh failures preserve the last successfully loaded list', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'保留的对话',ctime:'2026-10-29 12:00'}]});
    app.hooks['/api/get_history']=() => response({e:'请求太频繁'},429);
    await app.click(app.element('.new-chat-btn'));
    await flush();
    assert.match(app.element('historyWrap').textContent, /保留的对话/);
});

test('deleting the active conversation aborts its stream and resets the composer', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'当前对话',ctime:'2026-10-29 12:00'}]});
    await app.click(app.element('historyWrap').children[0]);
    app.hooks['/stream_chat']=() => ({ok:true,body:{getReader:() => ({read:() => new Promise(() => {})})}});
    await app.context.window.fillInput('请等待回复');
    await flush();
    const remove=app.element('historyWrap').children[0].children[2];
    await remove.onclick({stopPropagation(){}});
    await flush();
    assert.equal(app.context.window.__busy,false);
    assert.equal(app.element('send-button').textContent,'发送');
    assert.ok(app.calls.find(call => call.url === '/stream_chat'));
});

test('switching topics aborts an upload and does not erase the new conversation status', async () => {
    const app=await customerPage({human:false});
    let aborted=false;
    app.hooks['/api/upload']=options => new Promise((resolve,reject) => {
        options.signal.addEventListener('abort', () => { aborted=true; reject(Object.assign(new Error('aborted'),{name:'AbortError'})); });
    });
    app.element('upload-input').files=[{name:'old.png'}];
    app.element('upload-input').onchange();
    await app.click(app.quickButtons[0]);
    await flush();
    assert.equal(aborted,true);
    assert.equal(app.element('upload-btn').disabled,false);
    assert.equal(app.calls.filter(call => call.url === '/stream_chat').length,1);
});

test('an upload timeout releases the composer and reports an actionable failure', async () => {
    const app=await customerPage({human:false});
    app.hooks['/api/upload']=options => new Promise((resolve,reject) => {
        options.signal.addEventListener('abort', () => reject(Object.assign(new Error('aborted'),{name:'AbortError'})));
    });
    app.element('upload-input').files=[{name:'slow.png'}];
    app.element('upload-input').onchange();
    await app.runTimers(15000);
    assert.equal(app.element('upload-btn').disabled,false);
    assert.match(app.element('composer-status').textContent,/附件上传失败/);
    await app.context.window.fillInput('请继续查单');
    await flush();
    assert.equal(app.calls.filter(call => call.url === '/stream_chat').length,1);
});

test('malformed stored pin preferences cannot break the conversation list', async () => {
    const app=await customerPage({human:false,storage:{pinned_conv:'{broken'},history:[{id:9,title:'正常对话',ctime:'now'}]});
    assert.match(app.element('historyWrap').textContent,/正常对话/);
});

test('clearing history blocks new conversations until its timed request settles', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'保留历史',ctime:'now'}]});
    app.hooks['/api/clear_all']=options => new Promise((resolve,reject) => {
        options.signal.addEventListener('abort', () => reject(Object.assign(new Error('timeout'),{name:'AbortError'})));
    });
    app.element('.clear-all-btn').click();
    await app.click(app.quickButtons[1]);
    await app.context.window.showHuman();
    assert.equal(app.calls.filter(call => call.url === '/api/new_chat').length,0);
    await app.runTimers(10000);
    assert.match(app.element('historyWrap').textContent,/保留历史/);
    await app.click(app.quickButtons[0]);
    assert.equal(app.calls.filter(call => call.url === '/stream_chat').length,1);
});

test('a failed history deletion preserves the active conversation for the next message', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'当前历史',ctime:'now'}]});
    await app.click(app.element('historyWrap').children[0]);
    app.hooks['/api/del_history?id=9']=() => response({ok:false},503);
    await app.element('historyWrap').children[0].children[2].onclick({stopPropagation(){}});
    await app.context.window.fillInput('继续这个问题');
    await flush();
    assert.equal(app.calls.find(call => call.url === '/stream_chat').body.conv_id,9);
});

test('successful deletion updates the local list even when its refresh is rate limited', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'待删除会话',ctime:'now'},{id:10,title:'保留会话',ctime:'now'}]});
    app.hooks['/api/get_history']=() => response({e:'请求太频繁'},429);
    await app.element('historyWrap').children[0].children[2].onclick({stopPropagation(){}});
    assert.doesNotMatch(app.element('historyWrap').textContent,/待删除会话/);
    assert.match(app.element('historyWrap').textContent,/保留会话/);
});

test('successful clearing removes cached history when the followup refresh fails', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'待清空会话',ctime:'now'}]});
    app.hooks['/api/clear_all']=() => response({ok:true});
    app.hooks['/api/get_history']=() => Promise.reject(new Error('offline'));
    app.element('.clear-all-btn').click();
    await flush();
    assert.doesNotMatch(app.element('historyWrap').textContent,/待清空会话/);
    assert.ok(app.element('historyWrap').querySelector('.history-empty'));
});

test('a history refresh started before a deletion cannot resurrect the deleted item', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'旧刷新中的会话',ctime:'now'}]});
    let resolve, refreshes=0;
    app.hooks['/api/get_history']=() => ++refreshes === 1 ? new Promise(done => { resolve=done; }) : response({e:'请求太频繁'},429);
    await app.click(app.element('.new-chat-btn'));
    await app.element('historyWrap').children[0].children[2].onclick({stopPropagation(){}});
    resolve(response([{id:9,title:'旧刷新中的会话',ctime:'now'}]));
    await flush();
    assert.doesNotMatch(app.element('historyWrap').textContent,/旧刷新中的会话/);
});

test('history text and order cards preserve their original times and card actions', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'历史时间',ctime:'2026-10-28 07:12'}]});
    app.hooks.messages=() => response([
        {role:'user',content:'FL202610290001',ctime:'2026-10-28 07:12'},
        {role:'assistant',content:'__CARD__'+JSON.stringify({kind:'order',no:'FL202610290001',status:'履约中',fields:[],nodes:[],summary:'订单概要'}),ctime:'2026-10-28 07:13'},
        {role:'assistant',content:'后续补充回复',ctime:'2026-10-28 07:14'}
    ]);
    await app.click(app.element('historyWrap').children[0]);
    const times=app.element('chatDom').querySelectorAll('.msg-time');
    assert.deepEqual(times.map(item => item.textContent),['07:12','07:13','07:14']);
    assert.equal(times[0].title,'2026-10-28 07:12');
    assert.ok(app.element('chatDom').querySelector('.track-card').querySelector('.msg-actions'));
});

test('recalling an earlier reply preserves newer replies in the customer log', async () => {
    const app = await customerPage();
    app.setState({status:'active', messages:[{id:1, side:'agent', content:'早先的回复'}, {id:2, side:'agent', content:'最新回复'}]});
    await app.tick();
    app.setState({status:'active', messages:[{id:3, side:'system', content:'该消息已撤回', recalled_id:1}]});
    await app.tick();
    const log = app.element('chatDom');
    assert.match(log.textContent, /该消息已撤回/);
    assert.match(log.textContent, /最新回复/);
    assert.doesNotMatch(log.textContent, /早先的回复/);
});

function response(data, status = 200){ return {ok:status >= 200 && status < 300, status, json:async () => data}; }

test('all three footer questions leave the human queue and send to separate AI conversations', async () => {
    const app = await customerPage();
    for(const button of app.quickButtons) await app.click(button);
    const requests = app.calls.filter(call => call.url === '/stream_chat');
    assert.equal(requests.length, 3);
    assert.equal(new Set(requests.map(call => call.body.conv_id)).size, 3);
    assert.deepEqual(requests.map(call => call.body.msg), ['按入仓码查轨迹', '欧洲海运专线报价', '包裹异常处理']);
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/send').length, 0);
    assert.equal(app.context.window.humanSid, 0);
    assert.equal(app.element('human-session').hidden, true);
});

test('welcome and hot question buttons use the same AI routing as the footer', async () => {
    const app = await customerPage();
    for(const question of ['欧洲海运专线报价', '如何申请理赔？']){
        const button = app.element('question-'+question);
        button.dataset.question = question;
        app.element('chatDom').listeners.click({target:button});
        await flush();
    }
    const requests = app.calls.filter(call => call.url === '/stream_chat');
    assert.deepEqual(requests.map(call => call.body.msg), ['欧洲海运专线报价', '如何申请理赔？']);
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/send').length, 0);
});

test('the welcome contact button opens the human queue and does not send an AI question', async () => {
    const app = await customerPage({human:false});
    const button = app.element('contact-card');
    button.setAttribute('data-human-support', '');
    app.element('chatDom').listeners.click({target:button});
    await flush();
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/request').length, 1);
    assert.equal(app.calls.filter(call => call.url === '/stream_chat').length, 0);
    assert.equal(app.element('human-session').hidden, false);
});

test('new chat clears human routing and the next quote is sent to AI', async () => {
    const app = await customerPage();
    await app.click(app.element('.new-chat-btn'));
    await app.context.window.fillInput('请报价，30KG发往美国FBA仓');
    await flush();
    assert.equal(app.calls.find(call => call.url === '/stream_chat').body.msg, '请报价，30KG发往美国FBA仓');
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/send').length, 0);
    assert.equal(app.context.window.__busy, false);
});

test('opening AI history clears the human session and retains that conversation id', async () => {
    const app = await customerPage({history:[{id:9, title:'之前的对话', ctime:'2026-10-29 12:00'}]});
    await app.click(app.element('historyWrap').children[0]);
    await app.context.window.fillInput('请继续回答这个问题');
    await flush();
    assert.equal(app.calls.find(call => call.url === '/stream_chat').body.conv_id, 9);
    assert.equal(app.context.window.humanSid, 0);
    const authors = app.element('chatDom').querySelectorAll('.message-author');
    assert.ok(authors.some(author => author.innerHTML.includes('data-i18n="assistant"')));
});

test('a repeated quick click while a new conversation is being created sends only once', async () => {
    const app = await customerPage({human:false});
    let resolve;
    app.hooks['/api/new_chat'] = () => new Promise(done => { resolve=done; });
    app.quickButtons[0].click();
    app.quickButtons[0].click();
    assert.equal(app.calls.filter(call => call.url === '/api/new_chat').length, 1);
    resolve(response({id:12, welcome:'welcome'}));
    await flush();
    assert.equal(app.calls.filter(call => call.url === '/stream_chat').length, 1);
});

test('a late conversation creation cannot replace the newest quick question', async () => {
    const app = await customerPage({human:false});
    let resolve, count=0;
    app.hooks['/api/new_chat'] = () => ++count === 1 ? new Promise(done => { resolve=done; }) : response({id:22, welcome:'welcome'});
    app.quickButtons[0].click();
    await app.click(app.quickButtons[2]);
    resolve(response({id:21, welcome:'welcome'}));
    await flush();
    const requests = app.calls.filter(call => call.url === '/stream_chat');
    assert.equal(requests.length, 1);
    assert.equal(requests[0].body.conv_id, 22);
    assert.equal(requests[0].body.msg, '包裹异常处理');
    assert.equal(app.context.window.__busy, false);
});

test('a late history response cannot overwrite the latest quick conversation', async () => {
    const app = await customerPage({history:[{id:9, title:'旧会话', ctime:'2026-10-29 12:00'}]});
    let resolve;
    app.hooks.messages = () => new Promise(done => { resolve=done; });
    await app.click(app.element('historyWrap').children[0]);
    await app.click(app.quickButtons[1]);
    resolve(response([{role:'user', content:'旧会话的内容不应显示'}]));
    await flush();
    assert.doesNotMatch(app.element('chatDom').textContent, /旧会话的内容不应显示/);
    assert.match(app.element('chatDom').textContent, /测试 AI 回复/);
});

test('a delayed human connection cannot capture a newly selected AI topic', async () => {
    const app = await customerPage({human:false});
    let resolve;
    app.hooks['/api/visitor/human/request'] = () => new Promise(done => { resolve=done; });
    const connecting = app.context.window.showHuman();
    await flush();
    await app.click(app.quickButtons[1]);
    resolve(response({ok:true, session_id:8}));
    await connecting;
    assert.equal(app.context.window.humanSid, 0);
    assert.equal(app.element('human-session').hidden, true);
    assert.equal(app.calls.filter(call => call.url === '/stream_chat').length, 1);
});

test('repeated contact clicks create one human request and show a visible queue state', async () => {
    const app = await customerPage({human:false});
    await Promise.all([app.context.window.showHuman(), app.context.window.showHuman()]);
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/request').length, 1);
    assert.equal(app.element('human-session').hidden, false);
    assert.match(app.element('human-session-label').textContent, /正在排队/);
});

test('the contact shortcut outside service hours submits a ticket without entering human mode', async () => {
    const app = await customerPage({human:false, hour:12,serviceClosed:true, offlineMessage:'请明天跟进报价'});
    await app.context.window.showHuman();
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/request').length, 1);
    assert.equal(app.calls.find(call => call.url === '/api/ticket').body.content, '请明天跟进报价');
    assert.match(app.element('chatDom').textContent, /留言已提交/);
    assert.equal(app.context.window.humanSid, 0);
});

test('a failed human send preserves the text and makes retry possible', async () => {
    const app = await customerPage();
    app.hooks['/api/visitor/human/send'] = () => response({ok:false}, 503);
    await app.context.window.fillInput('请确认这批货的价格');
    assert.equal(app.element('input-text').value, '请确认这批货的价格');
    assert.match(app.element('composer-status').textContent, /内容已保留/);
    assert.equal(app.element('send-button').disabled, false);
});

test('a visitor whose phone says late at night can still reach an open support service', async () => {
    const app=await customerPage({human:false,hour:23});
    await app.context.window.showHuman();
    assert.equal(app.context.window.humanSid,7);
    assert.equal(app.calls.filter(call=>call.url==='/api/ticket').length,0);
});

test('a duplicate human send cannot submit an in-flight message twice', async () => {
    const app = await customerPage();
    let resolve;
    app.hooks['/api/visitor/human/send'] = () => new Promise(done => { resolve=done; });
    const first = app.context.window.fillInput('请确认时效');
    await app.context.window.fillInput('请确认时效');
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/send').length, 1);
    resolve(response({ok:true}));
    await first;
    assert.equal(app.element('input-text').value, '');
});

test('returning to AI explicitly closes the human session and preserves the conversation', async () => {
    const app = await customerPage();
    await app.click(app.element('return-ai'));
    await app.context.window.fillInput('请继续解答');
    await flush();
    assert.equal(app.calls.filter(call => call.url === '/api/visitor/human/close').length, 1);
    assert.equal(app.calls.find(call => call.url === '/stream_chat').body.conv_id, 1);
    assert.equal(app.context.window.humanSid, 0);
});

test('a stale human poll cannot append messages to a newly selected AI topic', async () => {
    const app = await customerPage();
    let resolve;
    app.hooks.poll = () => new Promise(done => { resolve=done; });
    await app.tick();
    await app.click(app.quickButtons[1]);
    resolve(response({status:'active', messages:[{id:1, side:'agent', content:'旧人工会话的回复'}]}));
    await flush();
    assert.doesNotMatch(app.element('chatDom').textContent, /旧人工会话的回复/);
});

test('human poll failures are visible and clear after the connection recovers', async () => {
    const app = await customerPage();
    app.hooks.poll = () => Promise.reject(new Error('Disconnected'));
    await app.tick();
    assert.match(app.element('composer-status').textContent, /连接中断/);
    delete app.hooks.poll;
    await app.tick();
    assert.equal(app.element('composer-status').hidden, true);
});

test('order cards show facts as text without import metadata, including older saved cards', async () => {
    const app = await customerPage({human:false});
    const card = {kind:'order', no:'FL202610290001', status:'履约中',
        fields:[{key:'weight',value:'30.000 kg'},{key:'warehouse',value:'<img src=x onerror=bad()>'}],
        nodes:[{time:'2026-10-29 10:00',text:'已提交',place:''}],
        summary:'订单 FL202610290001，申报毛重30.000 kg', snapshot_at:'2026-10-29 10:30', notice:'旧数据说明'};
    app.hooks['/stream_chat'] = () => {
        let read = false;
        return {ok:true, body:{getReader:() => ({read:async () => {
            if(read) return {done:true};
            read = true;
            return {done:false,value:new TextEncoder().encode('data: '+JSON.stringify({card})+'\n\ndata: {"d":1}\n\n')};
        }})}};
    };
    await app.context.window.fillInput('FL202610290001');
    await flush();
    const log = app.element('chatDom');
    const fields = log.querySelector('.order-data-fields');
    assert.ok(fields);
    assert.equal(fields.children[1].textContent, '30.000 kg');
    assert.equal(fields.children[3].innerHTML, '');
    assert.equal(log.querySelector('.order-data-notice'), null);
    assert.doesNotMatch(log.textContent, /旧数据说明|数据导入|2026-10-29 10:30/);
    assert.equal(app.context.window.__busy, false);
});

test('shipment cards separate forecasts from actual progress and retain both in history', async () => {
    const app = await customerPage({human:false, history:[{id:8,title:'订单轨迹',ctime:'2026-10-29'}]});
    const card = {kind:'order', no:'FL202610290001', status:'履约中', fields:[], node_kind:'logistics',
        tracking_status:'船舶已离开起运港', nodes:[{time:'2026-10-28 10:00',text:'船舶已离开起运港',place:'起运港'}],
        estimated_nodes:[{time:'2026-11-02 10:00',text:'预计到达目的港',place:'<img src=x onerror=bad()>'}],
        summary:'船舶已离开起运港，预计到达目的港2026-11-02'};
    app.hooks.messages = () => response([{role:'assistant',content:'__CARD__'+JSON.stringify(card),ctime:'2026-10-29 10:00'}]);
    await app.click(app.element('historyWrap').children[0]);
    const log = app.element('chatDom');
    assert.match(log.textContent, /物流轨迹/);
    assert.match(log.textContent, /预计节点/);
    assert.match(log.textContent, /预计到达目的港/);
    const timelines = log.querySelectorAll('.track-timeline');
    assert.equal(timelines.length, 2);
    assert.ok(timelines[0].querySelector('.track-node').classList.contains('active'));
    assert.equal(timelines[1].querySelector('.track-node').classList.contains('active'), false);
    assert.match(timelines[1].querySelector('.track-text').innerHTML, /&lt;img/);
    assert.ok(log.querySelector('.msg-actions'));
});

test('inbound codes are the primary card identity for live replies and restored history', async () => {
    const app=await customerPage({human:false,history:[{id:8,title:'入仓轨迹',ctime:'now'}]});
    const card={kind:'order',no:'FL202610290001',status:'履约中',
        fields:[{key:'inbound',value:'INB20261029001-01'},{key:'number',value:'FL202610290001'}],
        nodes:[],summary:'入仓码 INB20261029001-01'};
    app.hooks['/stream_chat']=()=>streamResponse(['data: '+JSON.stringify({card})+'\n\ndata: {"d":1}\n\n']);
    await app.context.window.fillInput('INB20261029001-01');await flush();
    let heading=app.element('chatDom').querySelector('.track-no');
    assert.match(heading.innerHTML,/入仓码.*INB20261029001-01/);assert.doesNotMatch(heading.innerHTML,/FL202610290001/);
    assert.match(app.element('chatDom').querySelector('.order-data-fields').textContent,/订单号.*FL202610290001/);
    app.hooks.messages=()=>response([{role:'assistant',content:'__CARD__'+JSON.stringify(card),ctime:'now'}]);
    await app.click(app.element('historyWrap').children[0]);
    heading=app.element('chatDom').querySelector('.track-no');
    assert.match(heading.innerHTML,/入仓码.*INB20261029001-01/);assert.doesNotMatch(heading.innerHTML,/FL202610290001/);
});

test('order details can expand without hiding the shipment timeline', async () => {
    const app = await customerPage({human:false,width:390});
    const card = {kind:'order',no:'ORDER2026001',status:'履约中',node_kind:'logistics',
        fields:[{key:'shipment',value:'LONG-SHIPMENT-20261030001'}],
        nodes:[{time:'2026-10-29 10:00',text:'海运途中',place:''}],summary:'订单概要'};
    app.hooks['/stream_chat'] = () => streamResponse(['data: '+JSON.stringify({card})+'\n\ndata: {"d":1}\n\n']);
    await app.context.window.fillInput('ORDER2026001');
    await flush();
    const log=app.element('chatDom'), fields=log.querySelector('.order-data-fields');
    const toggle=log.querySelector('.order-details-toggle');
    assert.equal(toggle.getAttribute('aria-expanded'),'false');
    assert.ok(fields.classList.contains('is-collapsed'));
    assert.match(log.querySelector('.track-timeline').textContent,/海运途中/);
    await app.click(toggle);
    assert.equal(toggle.getAttribute('aria-expanded'),'true');
    assert.equal(fields.classList.contains('is-collapsed'),false);
    assert.match(fields.textContent,/LONG-SHIPMENT-20261030001/);
    await app.click(toggle);
    assert.ok(fields.classList.contains('is-collapsed'));
});

test('viewport changes keep latest replies visible and preserve an older reading position', async () => {
    const app=await customerPage({human:false,width:390,viewportHeight:844});
    await app.context.window.fillInput('查询物流');
    await flush();
    const log=app.element('chatDom');
    Object.assign(log,{scrollHeight:1500,clientHeight:600,scrollTop:900});
    log.listeners.scroll();
    log.clientHeight=260;
    await app.resize(500);
    assert.equal(app.element('.chat-container').style.height,'500px');
    assert.equal(log.scrollTop,log.scrollHeight);
    log.scrollTop=100;
    log.listeners.scroll();
    await app.resizeViewport(450);
    assert.equal(app.element('.chat-container').style.height,'450px');
    assert.equal(log.scrollTop,100);
    await app.resizeViewport(400,2);
    assert.equal(app.element('.chat-container').style.height,'');
    assert.equal(log.scrollTop,100);
});

test('clearing a sent draft restores a single-row composer instead of sizing to its placeholder', async () => {
    const app=await customerPage({human:false,width:320});
    const input=app.element('input-text');
    input.value='多行内容\n第二行';
    input.listeners.input();
    assert.equal(input.style.height,'140px');
    await app.context.window.fillInput(input.value);
    await flush();
    assert.equal(input.value,'');
    assert.equal(input.style.height,'');
});

test('keyboard panning keeps the whole mobile frame in the visual viewport and restores after closing', async () => {
    const app=await customerPage({human:false,width:390,viewportHeight:844});
    const input=app.element('input-text'), frame=app.element('.chat-container');
    input.focus();
    await app.resizeViewport(430,1,180);
    assert.equal(frame.style.height,'430px');
    assert.equal(frame.style.top,'180px');
    assert.ok(frame.classList.contains('is-composing'));
    await app.panViewport(260);
    assert.equal(frame.style.top,'260px');
    assert.equal(frame.style.height,'430px');
    await app.resizeViewport(0,1,0);
    assert.equal(frame.style.height,'430px');
    input.blur();
    await app.resizeViewport(844);
    assert.equal(frame.style.top,'0px');
    assert.equal(frame.style.height,'844px');
    assert.equal(frame.classList.contains('is-composing'),false);
});

test('embedded browsers without visualViewport use the resized window and recover on pageshow', async () => {
    const app=await customerPage({human:false,width:390,height:844});
    const frame=app.element('.chat-container');
    assert.equal(frame.style.height,'844px');
    await app.resize(410);
    assert.equal(frame.style.height,'410px');
    app.context.window.innerHeight=844;
    await app.pageShow();
    assert.equal(frame.style.height,'844px');
    app.context.window.innerWidth=1200;
    await app.resize(720);
    assert.equal(frame.style.height,'');
    assert.equal(frame.style.top,'');
});

test('a multiline draft leaves room for messages when the keyboard reduces the viewport', async () => {
    const app=await customerPage({human:false,width:390,viewportHeight:844});
    const input=app.element('input-text');
    input.value='多行草稿';
    input.scrollHeight=300;
    input.listeners.input();
    assert.equal(input.style.height,'140px');
    await app.resizeViewport(340);
    assert.equal(input.style.height,'85px');
    await app.resizeViewport(844);
    assert.equal(input.style.height,'140px');
});

test('late AI completion does not steal focus or reopen a dismissed mobile keyboard', async () => {
    for(const width of [390,1200]){
        const app=await customerPage({human:false,width,viewportHeight:844});
        const input=app.element('input-text');
        let reply;
        app.hooks['/stream_chat']=()=>new Promise(resolve=>{reply=resolve;});
        input.focus();
        await app.context.window.fillInput('报价问题');
        await flush();
        input.blur();
        app.element('history-search').focus();
        const before=input.focusCalls.length;
        reply(streamResponse(['data: {"t":"完成回复"}\n\ndata: {"d":1}\n\n']));
        await flush();await flush();
        assert.equal(input.focusCalls.length,before);
        assert.equal(app.context.document.activeElement,app.element('history-search'));
        assert.match(app.element('chatDom').textContent,/完成回复/);
    }
});

test('mobile quick questions keep the keyboard closed and composer controls finish clicking before blur changes layout', async () => {
    const app=await customerPage({human:false,width:390});
    const input=app.element('input-text');
    await app.context.window.fillInput('快捷咨询');await flush();
    assert.equal(input.focusCalls.length,0);
    input.focus();
    for(const event of ['pointerdown','mousedown']){
        for(const name of ['send-button','voice-toggle','emoji-toggle','upload-btn']){
            let prevented=false;
            app.element('.composer').listeners[event]({button:0,target:{closest:()=>app.element(name)},preventDefault(){prevented=true;}});
            assert.ok(prevented);
        }
    }
    let blockedTextSelection=false;
    app.element('.composer').listeners.pointerdown({button:0,target:{closest:()=>null},preventDefault(){blockedTextSelection=true;}});
    assert.equal(blockedTextSelection,false);
    assert.equal(app.context.document.activeElement,input);
});

test('recognized voice uses the normal AI and human send routes with a visible user message', async () => {
    for(const human of [false,true]){
        const app=await customerPage({human,width:390});
        await app.voiceOptions.onText('语音识别的物流问题');
        await flush();
        const call=app.calls.find(call=>call.url===(human ? '/api/visitor/human/send' : '/stream_chat'));
        assert.ok(call);
        assert.equal(human ? call.body.content : call.body.msg,'语音识别的物流问题');
        assert.match(app.element('chatDom').querySelector('.user-message').textContent,/语音识别的物流问题/);
        assert.equal(app.element('input-text').value,'');
    }
});

test('a failed voice send keeps the transcript editable and a newer draft is not auto-submitted', async () => {
    const app=await customerPage({human:false,width:390});
    app.hooks['/api/new_chat']=()=>Promise.reject(new Error('offline'));
    await app.voiceOptions.onText('语音内容');
    assert.equal(app.element('input-text').value,'语音内容');
    assert.equal(app.element('.input-area').classList.contains('voice-mode'),false);
    app.element('input-text').value='新草稿';
    await app.voiceOptions.onText('后到的识别文字');
    assert.equal(app.element('input-text').value,'新草稿\n后到的识别文字');
    assert.equal(app.calls.filter(call=>call.url==='/stream_chat').length,0);
});

test('a blocked retry retains its previous answer until a replacement can start', async () => {
    const app=await customerPage({human:false});
    await app.context.window.fillInput('之前的问题');await flush();
    const log=app.element('chatDom'), retry=log.querySelectorAll('.msg-action-btn').find(button=>button.dataset.action==='retry');
    app.hooks['/api/upload']=options=>new Promise((resolve,reject)=>{
        options.signal.addEventListener('abort',()=>reject(Object.assign(new Error(),{name:'AbortError'})));
    });
    app.element('upload-input').files=[{name:'pending.pdf'}];
    app.element('upload-input').onchange();await flush();
    await app.click(retry);
    assert.match(log.textContent,/测试 AI 回复/);
    assert.equal(app.calls.filter(call=>call.url==='/stream_chat').length,1);
    await app.runTimers(15000);
    await app.click(retry);await flush();
    assert.equal(app.calls.filter(call=>call.url==='/stream_chat').length,2);
    assert.equal(log.querySelectorAll('.msg-action-btn').filter(button=>button.dataset.action==='retry').length,1);
});

test('an AI regeneration is not forwarded to a human session', async () => {
    const app=await customerPage({human:false});
    await app.context.window.fillInput('之前的问题');await flush();
    const retry=app.element('chatDom').querySelectorAll('.msg-action-btn').find(button=>button.dataset.action==='retry');
    await app.context.window.showHuman();await app.click(retry);
    assert.equal(app.calls.filter(call=>call.url==='/api/visitor/human/send').length,0);
    assert.match(app.element('chatDom').textContent,/测试 AI 回复/);
    assert.match(app.element('composer-status').textContent,/先返回 AI/);
});

test('feedback waits for server confirmation, ignores rapid duplicates and allows retry after failure', async () => {
    const app=await customerPage({human:false});
    await app.context.window.fillInput('反馈测试');await flush();
    const log=app.element('chatDom'), buttons=log.querySelectorAll('.msg-action-btn');
    const up=buttons.find(button=>button.textContent==='👍'), down=buttons.find(button=>button.textContent==='👎');
    let finish;
    app.hooks['/api/feedback']=()=>new Promise(resolve=>{finish=resolve;});
    const sending=up.onclick();
    await flush();
    await down.onclick();
    assert.equal(app.calls.filter(call=>call.url==='/api/feedback').length,1);
    assert.equal(up.classList.contains('voted'),false);
    assert.ok(up.disabled && down.disabled);
    finish(response({ok:false},503));await sending;
    assert.equal(up.classList.contains('voted'),false);
    assert.match(log.textContent,/评价未提交/);
    assert.equal(up.disabled,false);
    app.hooks['/api/feedback']=()=>response({ok:true});
    await up.onclick();
    assert.ok(up.classList.contains('voted'));
    assert.equal(up.getAttribute('aria-pressed'),'true');
    assert.match(log.textContent,/感谢您的评价/);
    await up.onclick();
    assert.equal(app.calls.filter(call=>call.url==='/api/feedback').length,2);
});

test('clipboard rejection and a failed fallback never report a successful copy', async () => {
    const app=await customerPage({human:false,copyResult:false,clipboard:{writeText:()=>Promise.reject(new Error('denied'))}});
    await app.context.window.fillInput('复制测试');await flush();
    const copy=app.element('chatDom').querySelectorAll('.msg-action-btn').find(button=>button.dataset.action==='copy');
    app.element('input-text').focus();
    await copy.onclick();await flush();
    assert.equal(copy.textContent,'复制失败');
    assert.equal(copy.disabled,false);
    assert.equal(app.context.document.activeElement,app.element('input-text'));
    assert.equal(app.element('input-text').focusCalls.at(-1).preventScroll,true);
    assert.equal(app.context.document.body.children.length,0);
    await app.runTimers(3000);
    assert.equal(copy.textContent,'复制');
});

test('successful clipboard fallback reports copied and keeps text focus stable', async () => {
    const app=await customerPage({human:false});
    await app.context.window.fillInput('复制测试');await flush();
    const copy=app.element('chatDom').querySelectorAll('.msg-action-btn').find(button=>button.dataset.action==='copy');
    await copy.onclick();
    assert.equal(copy.textContent,'已复制');
    assert.equal(copy.disabled,false);
    await app.runTimers(1200);
    assert.equal(copy.textContent,'复制');
});

test('blank offline messages are ignored and invalid ticket text stays editable with a readable error', async () => {
    const empty=await customerPage({human:false,hour:23,serviceClosed:true,offlineMessage:'   '});
    await empty.context.window.showHuman();await flush();
    assert.equal(empty.calls.filter(call=>call.url==='/api/ticket').length,0);
    const app=await customerPage({human:false,hour:23,serviceClosed:true,offlineMessage:'需要保留的留言'});
    app.hooks['/api/ticket']=()=>response({ok:false,error:'请输入 1–2000 字的留言。'},400);
    await app.context.window.showHuman();await flush();
    assert.equal(app.element('input-text').value,'需要保留的留言');
    assert.notEqual(app.element('input-text').style.height,'');
    assert.match(app.element('composer-status').textContent,/1–2000/);
});

test('mobile history selection closes the drawer while desktop navigation stays visible', async () => {
    for(const width of [390,1200]){
        const app=await customerPage({human:false,width,history:[{id:9,title:'历史会话',ctime:'now'}]});
        if(width===390) await app.click(app.element('.toggle-divider'));
        assert.equal(app.element('.toggle-divider').getAttribute('aria-expanded'),'true');
        await app.click(app.element('historyWrap').children[0]);
        assert.equal(app.element('.toggle-divider').getAttribute('aria-expanded'),String(width>900));
    }
});

test('emoji panel dismisses outside or on Escape, stays open for its own controls, and closes on conversation change', async () => {
    const app=await customerPage({human:false,width:390});
    const toggle=app.element('emoji-toggle'), panel=app.element('emoji-panel');
    await app.click(toggle);
    assert.equal(panel.hidden,false);
    app.documentEvent('pointerdown',{target:panel.children[0]});
    assert.equal(panel.hidden,false);
    app.documentEvent('pointerdown',{target:app.element('input-text')});
    assert.equal(panel.hidden,true);
    assert.equal(toggle.getAttribute('aria-expanded'),'false');
    await app.click(toggle);
    app.documentEvent('keydown',{key:'Escape'});
    assert.equal(panel.hidden,true);
    await app.click(toggle);
    await app.click(app.element('.new-chat-btn'));
    assert.equal(panel.hidden,true);
});

test('drafts stay with their own conversation and restore across a page reload', async () => {
    const history=[{id:9,title:'A',ctime:'now'},{id:10,title:'B',ctime:'now'}];
    const app=await customerPage({human:false,history});
    await app.click(app.element('historyWrap').children[0]);
    app.element('input-text').value='A的未发送草稿';app.element('input-text').listeners.input();
    await app.click(app.element('historyWrap').children[1]);
    assert.equal(app.element('input-text').value,'');
    app.element('input-text').value='B的未发送草稿';app.element('input-text').listeners.input();
    await app.click(app.element('historyWrap').children[0]);
    assert.equal(app.element('input-text').value,'A的未发送草稿');
    await app.pageHide();
    const restored=await customerPage({human:false,history,storage:app.storage,tabStorage:app.tabStorage});
    await flush();
    assert.equal(restored.element('input-text').value,'A的未发送草稿');
    assert.ok(restored.calls.some(call=>call.url==='/api/get_messages?conv_id=9'));
    await restored.click(restored.element('historyWrap').children[1]);
    assert.equal(restored.element('input-text').value,'B的未发送草稿');
});

test('a new conversation draft restores after refresh and moves to the created conversation on send', async () => {
    const app=await customerPage({human:false});
    app.element('input-text').value='尚未发送';app.element('input-text').listeners.input();await app.pageHide();
    const restored=await customerPage({human:false,storage:app.storage,tabStorage:app.tabStorage});
    assert.equal(restored.element('input-text').value,'尚未发送');
    await restored.context.window.fillInput('尚未发送');await restored.pageHide();
    const store=restored.context.ChatDrafts.create({scope:'1'.repeat(64),storage:()=>restored.context.localStorage,tabStorage:()=>restored.context.sessionStorage});
    assert.equal(store.read(null),'');assert.equal(store.read(1),'');assert.equal(store.active(),'1');
});

test('draft recovery stays silent but quota failure remains visible until storage recovers', async () => {
    const history=[{id:9,title:'A',ctime:'now'}],app=await customerPage({human:false,history});
    await app.click(app.element('historyWrap').children[0]);
    app.element('input-text').value='已保存草稿';app.element('input-text').listeners.input();await app.pageHide();
    const restored=await customerPage({human:false,history,storage:app.storage,tabStorage:app.tabStorage});
    assert.equal(restored.element('input-text').value,'已保存草稿');
    assert.equal(restored.element('composer-status').textContent,'');
    const setItem=restored.context.localStorage.setItem;
    restored.context.localStorage.setItem=()=>{throw Error('quota');};
    restored.element('input-text').value='新的未保存输入';restored.element('input-text').listeners.input();await restored.runTimers(250);
    assert.match(restored.element('composer-status').textContent,/无法保存/);
    assert.equal(restored.element('input-text').value,'新的未保存输入');
    restored.context.localStorage.setItem=setItem;await restored.pageHide();
    assert.equal(restored.element('composer-status').textContent,'');
});

test('restoring an old conversation cannot replace a newer user-selected draft', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'A',ctime:'now'}]});
    await app.click(app.element('historyWrap').children[0]);
    app.element('input-text').value='A草稿';app.element('input-text').listeners.input();await app.pageHide();
    let release;
    const restored=await customerPage({human:false,storage:app.storage,tabStorage:app.tabStorage,
        historyFetch:()=>new Promise(resolve=>{release=resolve;})});
    await restored.click(restored.element('.new-chat-btn'));
    restored.element('input-text').value='新话题草稿';restored.element('input-text').listeners.input();
    release(response([{id:9,title:'A',ctime:'now'}]));await flush();
    assert.equal(restored.element('input-text').value,'新话题草稿');
});

test('failed history loading cannot send a question under a hidden conversation context', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'A',ctime:'now'}]});
    await app.context.window.fillInput('原会话');await flush();
    app.hooks.messages=()=>response({ok:false},503);
    await app.click(app.element('historyWrap').children[0]);
    const before=app.calls.filter(call=>call.url==='/stream_chat').length;
    await app.context.window.fillInput('禁止发到未加载会话');
    assert.equal(app.calls.filter(call=>call.url==='/stream_chat').length,before);
    assert.match(app.element('composer-status').textContent,/会话未加载成功/);
    assert.doesNotMatch(app.element('chatDom').textContent,/原会话/);
});

test('startup removes a deleted active conversation draft without erasing a newer edit', async () => {
    const app=await customerPage({human:false,history:[{id:9,title:'A',ctime:'now'}]});
    await app.click(app.element('historyWrap').children[0]);
    app.element('input-text').value='旧会话草稿';app.element('input-text').listeners.input();await app.pageHide();
    const noEdit=await customerPage({human:false,storage:{...app.storage},tabStorage:{...app.tabStorage}});
    assert.equal(noEdit.element('input-text').value,'');
    assert.ok(!noEdit.calls.some(call=>call.url==='/api/get_messages?conv_id=9'));
    let release;
    const edited=await customerPage({human:false,storage:app.storage,tabStorage:app.tabStorage,
        historyFetch:()=>new Promise(resolve=>{release=resolve;})});
    edited.element('input-text').value='加载期间的新输入';edited.element('input-text').listeners.input();
    release(response([]));await flush();
    assert.equal(edited.element('input-text').value,'加载期间的新输入');
    await edited.context.window.fillInput('加载期间的新输入');
    assert.ok(!edited.calls.some(call=>call.url==='/stream_chat'));
    assert.match(edited.element('composer-status').textContent,/会话未加载成功/);
});

test('deleting a conversation removes only its saved draft', async () => {
    const history=[{id:9,title:'A',ctime:'now'},{id:10,title:'B',ctime:'now'}];
    const app=await customerPage({human:false,history});
    await app.click(app.element('historyWrap').children[0]);
    app.element('input-text').value='A草稿';app.element('input-text').listeners.input();
    await app.click(app.element('historyWrap').children[1]);
    app.element('input-text').value='B草稿';app.element('input-text').listeners.input();await app.pageHide();
    await app.element('historyWrap').children[0].children[2].onclick({stopPropagation(){}});
    const store=app.context.ChatDrafts.create({scope:'1'.repeat(64),storage:()=>app.context.localStorage,tabStorage:()=>app.context.sessionStorage});
    assert.equal(store.read(9),'');assert.equal(store.read(10),'B草稿');
});

test('an order login action resumes the original question and preserves a newer draft', async () => {
    const app=await customerPage({human:false});let authenticated=false;
    app.hooks['/api/customer/session']=()=>response({ok:true,authenticated,user:authenticated ? {id:1,name:'admin'} : null});
    app.hooks['/api/customer/login']=()=>{authenticated=true;return response({ok:true,authenticated:true,user:{id:1,name:'admin'}});};
    app.hooks['/stream_chat']=()=>streamResponse([`data: ${JSON.stringify(authenticated ? {t:'账号范围内的订单结果'} : {t:'请先登录',login_required:true})}\n\ndata: {"d":1}\n\n`]);
    await app.context.window.fillInput('查询ORDER20260001');await flush();
    const action=app.element('chatDom').querySelector('.customer-login-cta');assert.ok(action);
    app.element('input-text').value='下一条未发送草稿';app.element('input-text').listeners.input();
    await app.click(action);assert.equal(app.element('customer-login').hidden,false);
    app.element('customer-username').value='admin';app.element('customer-password').value='123456';
    await app.element('customer-login-form').listeners.submit({preventDefault(){}});await flush();
    assert.equal(app.element('customer-login').hidden,true);assert.equal(app.element('customer-password').value,'');
    assert.equal(app.element('input-text').value,'下一条未发送草稿');
    assert.equal(app.calls.filter(call=>call.url==='/stream_chat').length,2);
    assert.match(app.element('chatDom').textContent,/账号范围内的订单结果/);
    assert.match(app.element('customer-account').textContent,/admin/);
});

test('invalid customer credentials leave the login form open without sending another question', async () => {
    const app=await customerPage({human:false});
    app.hooks['/api/customer/login']=()=>response({ok:false,error:'账号或密码不正确。'},403);
    await app.click(app.element('customer-account'));
    app.element('customer-username').value='admin';app.element('customer-password').value='wrong';
    await app.element('customer-login-form').listeners.submit({preventDefault(){}});
    assert.equal(app.element('customer-login').hidden,false);
    assert.match(app.element('customer-error').textContent,/账号或密码/);
    assert.equal(app.calls.filter(call=>call.url==='/api/customer/login').length,1);
    assert.equal(app.calls.filter(call=>call.url==='/stream_chat').length,0);
    await app.click(app.element('customer-cancel'));
    assert.equal(app.element('customer-login').hidden,true);assert.equal(app.element('customer-password').value,'');
});

test('a late login cannot replay an order into a newer conversation', async () => {
    const app=await customerPage({human:false});let release;
    app.hooks['/api/customer/session']=()=>response({ok:true,authenticated:false,user:null});
    app.hooks['/stream_chat']=()=>streamResponse(['data: {"t":"先登录","login_required":true}\n\ndata: {"d":1}\n\n']);
    app.hooks['/api/customer/login']=()=>new Promise(resolve=>{release=resolve;});
    await app.context.window.fillInput('查询ORDER20260001');await flush();
    await app.click(app.element('chatDom').querySelector('.customer-login-cta'));
    app.element('customer-username').value='admin';app.element('customer-password').value='123456';
    const signing=app.element('customer-login-form').listeners.submit({preventDefault(){}});
    await app.click(app.element('.new-chat-btn'));
    app.element('input-text').value='新话题';app.element('input-text').listeners.input();
    release(response({ok:true,authenticated:true,user:{id:1,name:'admin'}}));await signing;
    assert.equal(app.calls.filter(call=>call.url==='/stream_chat').length,1);
    assert.equal(app.element('input-text').value,'新话题');
});

test('signing out clears visible order conversation and returns to guest mode', async () => {
    const app=await customerPage({human:false});
    app.hooks['/api/customer/login']=()=>response({ok:true,authenticated:true,user:{id:1,name:'admin'}});
    app.hooks['/api/customer/logout']=()=>response({ok:true,authenticated:false,user:null});
    await app.click(app.element('customer-account'));
    app.element('customer-username').value='admin';app.element('customer-password').value='123456';
    await app.element('customer-login-form').listeners.submit({preventDefault(){}});
    await app.context.window.fillInput('ORDER20260001');await flush();
    assert.ok(app.element('chatDom').querySelector('.user-message'));
    await app.click(app.element('customer-account'));
    assert.equal(app.element('customer-account').textContent,'登录');
    assert.equal(app.element('chatDom').querySelector('.user-message'),null);
    assert.equal(app.calls.filter(call=>call.url==='/api/customer/logout').length,1);
});

test('an unavailable image gets one readable replacement instead of a broken image', async () => {
    const app=await customerPage({human:false});
    let shown;
    const image={tagName:'IMG',classList:{contains:name=>name==='message-image'},dataset:{},after:hint=>{shown=hint;}};
    app.element('chatDom').listeners.error({target:image});
    assert.equal(image.hidden,true);
    assert.match(shown.textContent,/图片暂时无法访问/);
    const first=shown;
    app.element('chatDom').listeners.error({target:image});
    assert.equal(shown,first);
});