// One lookup form for shortcuts and saved order cards; no draft or chat ownership changes.
var OrderLookup = {
    create(options){
        const overlay=document.getElementById('order-lookup');
        const form=document.getElementById('order-lookup-form');
        const input=document.getElementById('order-reference');
        const label=document.getElementById('order-reference-label');
        const title=document.getElementById('order-lookup-title');
        const submit=document.getElementById('order-lookup-submit');
        const cancel=document.getElementById('order-lookup-cancel');
        const copy=document.getElementById('order-reference-copy');
        const error=document.getElementById('order-lookup-error');
        let kind='inbound', opener=null, busy=false, copying=false, copyState='', version=0, timer=null;
        overlay.hidden=true;
        function valid(value){
            return /^[A-Za-z0-9][A-Za-z0-9_-]{5,63}$/.test(value) && (value.match(/[0-9]/g) || []).length >= 3;
        }
        function status(message){ error.textContent=message || ''; error.hidden=!message; }
        function render(){
            title.textContent=options.text(kind === 'inbound' ? 'lookupTitle' : 'lookupOrderTitle');
            label.textContent=options.text(kind === 'inbound' ? 'order_inbound' : 'orderNo');
            input.placeholder=options.text(kind === 'inbound' ? 'lookupPlaceholder' : 'lookupOrderPlaceholder');
            submit.textContent=options.text(busy ? 'lookupSending' : 'lookupSubmit');
            cancel.textContent=options.text('customerCancel');
            copy.textContent=options.text(copyState || 'copy');
            submit.disabled=busy; cancel.disabled=busy; input.disabled=busy;
            copy.disabled=busy || copying || !valid(input.value.trim());
        }
        function clearTimer(){ if(timer !== null) clearTimeout(timer); timer=null; }
        function close(){
            version+=1;clearTimer();overlay.hidden=true;
            busy=false;copying=false;copyState='';input.value='';status('');render();
            if(opener && opener.isConnected) opener.focus({preventScroll:true});
            opener=null;
        }
        function open(reference, referenceKind, source){
            version+=1;clearTimer();kind=referenceKind === 'order' ? 'order' : 'inbound';
            busy=false;copying=false;copyState='';
            opener=source || document.activeElement;input.value=reference || '';status('');render();overlay.hidden=false;
            if(options.onOpen) options.onOpen();
            input.focus({preventScroll:true});
        }
        input.addEventListener('input',function(){ clearTimer();copyState='';status('');render(); });
        copy.onclick=async function(){
            const reference=input.value.trim(), token=version;
            if(busy || copying || !valid(reference)) return;
            copying=true;copyState='';status('');render();
            const copied=await SupportUI.copyText(reference);
            if(token !== version) return;
            copying=false;
            if(input.value.trim() === reference){
                copyState=copied ? 'copied' : 'copyFailed';
                if(!copied) status(options.text('copyFailed'));
                timer=setTimeout(function(){copyState='';timer=null;render();},copied ? 1200 : 3000);
            }
            render();
        };
        form.addEventListener('submit',async function(event){
            event.preventDefault();
            if(busy) return;
            const reference=input.value.trim(), token=version;
            if(!valid(reference)){status(options.text('lookupInvalid'));input.focus({preventScroll:true});return;}
            const blocked=options.canQuery();
            if(blocked){status(blocked);return;}
            busy=true;status('');render();
            try{
                const accepted=await options.query(reference,kind);
                if(token !== version) return;
                if(accepted) close();else status(options.text('lookupFailed'));
            }catch(error){if(token === version) status(options.text('lookupFailed'));}
            finally{if(token === version){busy=false;render();}}
        });
        cancel.onclick=function(){if(!busy) close();};
        overlay.addEventListener('click',function(event){if(event.target === overlay && !busy) close();});
        overlay.addEventListener('keydown',function(event){
            if(event.key === 'Escape' && !busy){event.preventDefault();close();return;}
            if(event.key === 'Tab'){
                const controls=[input,copy,cancel,submit].filter(control=>!control.disabled);
                event.preventDefault();
                if(controls.length){
                    const index=controls.indexOf(document.activeElement);
                    controls[(index+(event.shiftKey ? -1 : 1)+controls.length)%controls.length].focus({preventScroll:true});
                }
            }
        });
        render();
        return {open:open,cancel:close,render:render,viewport:function(height,top){
            overlay.style.height=height || '';overlay.style.top=top || '';overlay.style.bottom=height ? 'auto' : '';
        }};
    }
};