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(){
    const elements = new Map(), listeners = {}, intervals = [], calls = [];
    class Element {
        constructor(){
            this.children = []; this.attributes = {}; this.value = ''; this.style = {};
            this.className = ''; this.dataset = {}; this.scrollHeight = 300; this.clientHeight = 300;
            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; }
        getAttribute(name){ return this.attributes[name]; }
        addEventListener(){}
        appendChild(child){ child.parent = this; this.children.push(child); }
        append(...children){ children.forEach(child => this.appendChild(child)); }
        focus(){}
        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){ return this.classList.contains(selector.slice(1)) ? this : this.parent && this.parent.closest(selector); }
        remove(){ 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); };
    const document = {
        body: new Element(), documentElement: {},
        getElementById: id => ['human-typing', 'imgPreview', 'recentChatWrap'].includes(id) ? null : element(id),
        querySelector: selector => element(selector), querySelectorAll: () => [],
        createElement: () => new Element(),
        addEventListener: (name, callback) => { listeners[name] = callback; },
    };
    class TestDate extends Date { constructor(...args){ super(...(args.length ? args : [2026, 9, 29, 12])); } }
    let state = {status:'active', messages:[]};
    const context = vm.createContext({
        document, console, Date:TestDate, navigator:{language:'zh-CN'},
        localStorage:{getItem:() => null, setItem(){}},
        window:{innerWidth:1200, addEventListener(){}, matchMedia:() => ({matches:false})},
        setInterval: callback => { intervals.push(callback); return intervals.length; },
        clearInterval(){}, setTimeout(){}, clearTimeout(){},
        fetch: async (url, options) => {
            calls.push({url, body:options && options.body && JSON.parse(options.body)});
            const data = url === '/api/new_chat' ? {id:1, welcome:'welcome'}
                : url === '/api/human/request' ? {ok:true, session_id:7}
                : url.startsWith('/api/human/poll') ? state
                : url === '/api/rate' ? {ok:true} : [];
            return {ok:true, json:async () => data};
        },
    });
    for(const file of ['support.js', 'chat.js']){
        vm.runInContext(fs.readFileSync(path.join(__dirname, '../../static/js', file), 'utf8'), context, {filename:file});
    }
    listeners.DOMContentLoaded();
    await flush();
    await context.window.showHuman();
    await flush();
    return {context, element, calls, setState:value => { state=value; }, tick:async () => { intervals[0](); 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);
});

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/);
});