/**
 * V.AI STUDIO - Excel Export v1102
 * FIX: Hình ảnh 100x100px trong Excel
 */
(function(){
'use strict';

function fmt(n){
    if(n==null||n==='')return'0đ';
    var num=typeof n==='string'?parseFloat(n.replace(/[^\d.-]/g,'')):Number(n);
    if(isNaN(num))return'0đ';
    return num.toLocaleString('vi-VN')+'đ';
}

async function fetchImageArrayBuffer(url){
    if(!url||!url.startsWith('http')) return null;
    try{
        var r = await fetch(url,{mode:'cors'});
        if(r.ok) return await r.arrayBuffer();
    }catch(e){}
    try{
        var r2 = await fetch('https://api.allorigins.win/raw?url=' + encodeURIComponent(url));
        if(r2.ok) return await r2.arrayBuffer();
    }catch(e){}
    return null;
}

function getOrderCode(){
    var n = document.getElementById('quoteName')?.value || '';
    var h = window.location.hash;
    var today = new Date(), dd=today.getDate().toString().padStart(2,'0'), mm=(today.getMonth()+1).toString().padStart(2,'0'), yy=today.getFullYear().toString().slice(-2);
    var ini='';
    if(n && n.trim()){
        n.trim().split(/\s+/).forEach(function(w){
            if(w && /[A-Z]/.test(w.charAt(0).toUpperCase())) ini += w.charAt(0).toUpperCase();
        });
    }
    return 'VAS'+(ini||'X')+dd+mm+yy;
}

window.exportExcel = async function(){
    var cart = window.cart || [];
    if(!cart.length){alert('Giỏ trống!');return;}
    
    if(typeof ExcelJS === 'undefined'){
        var s = document.createElement('script');
        s.src = 'https://cdn.jsdelivr.net/npm/exceljs@4.4.0/dist/exceljs.min.js';
        document.head.appendChild(s);
        await new Promise(function(r){s.onload=r});
    }
    
    try{
        var code = getOrderCode();
        var wb = new ExcelJS.Workbook(), ws = wb.addWorksheet('Báo giá');
        
        // Column 2 width 15 for 100px image
        ws.columns = [
            {width:6},{width:15},{width:30},{width:15},
            {width:22},{width:8},{width:15},{width:15},{width:18},{width:16}
        ];
        
        // Header title
        ws.mergeCells('A1:J1');
        ws.getCell('A1').value = 'BẢNG BÁO GIÁ';
        ws.getCell('A1').font = {bold:true, size:18, color:{argb:'FFDB9815'}};
        ws.getCell('A1').alignment = {horizontal:'center'};
        ws.getRow(1).height = 30;
        
        // Table header
        var hr = ws.getRow(3);
        ['STT','Hình','Tên sản phẩm','Mã SP','Thông tin','SL','Đơn giá','Giá CK','Thành tiền','Ghi chú'].forEach(function(h,i){
            var c = hr.getCell(i+1);
            c.value = h;
            c.font = {bold:true, color:{argb:'FFFFFFFF'}, size:9};
            c.fill = {type:'pattern', pattern:'solid', fgColor:{argb:'FF003F62'}};
            c.alignment = {horizontal:'center', vertical:'middle'};
        });
        hr.height = 20;
        
        // Items with 100x100px images
        var firstRow = 5;
        await Promise.all(cart.map(async function(c, i){
            var p = window.D && D[c.idx] ? D[c.idx] : null;
            var row = ws.getRow(firstRow + i);
            row.height = 120; // 100px + padding
            
            var bgColor = i % 2 === 0 ? 'FFF8FAFC' : 'FFFFFFFF';
            
            row.getCell(1).value = i+1;
            row.getCell(1).alignment = {horizontal:'center', vertical:'middle'};
            
            // IMAGE 100x100px
            if((p && p.image) || c.image){
                var imgUrl = p?.image || c.image;
                var imgBuf = await fetchImageArrayBuffer(imgUrl);
                if(imgBuf){
                    try{
                        wb.addImage(wb.addImage({buffer:imgBuf, extension:'png'}), 
                            {tl:{col:1, row:firstRow+i-1}, ext:{width:100, height:100}});
                    }catch(e){}
                }
            }
            
            row.getCell(3).value = c.name || (p?p.name||p.n:'') || '';
            row.getCell(3).font = {bold:true, size:9};
            row.getCell(4).value = c.sku || (p?p.sku||p.model:'') || '';
            row.getCell(6).value = Number(c.qty||1);
            row.getCell(7).value = Number(c.priceNum||(p?p.priceNum:0)||0);
            row.getCell(7).numFmt = '#,##0"đ"';
            row.getCell(8).value = Number(c.priceNum||(p?p.priceNum:0)||0);
            row.getCell(8).numFmt = '#,##0"đ"';
            row.getCell(9).value = Number(c.priceNum||(p?p.priceNum:0)||0) * Number(c.qty||1);
            row.getCell(9).numFmt = '#,##0"đ"';
            
            for(var ci=1; ci<=10; ci++){
                row.getCell(ci).fill = {type:'pattern', pattern:'solid', fgColor:{argb:bgColor}};
            }
        }));
        
        var lastRow = firstRow + cart.length - 1;
        // Total row
        ws.getCell('A'+(lastRow+2)).value = 'TỔNG CỘNG';
        ws.getCell('A'+(lastRow+2)).font = {bold:true, size:13, color:{argb:'FFFFFFFF'}};
        ws.getCell('A'+(lastRow+2)).fill = {type:'pattern', pattern:'solid', fgColor:{argb:'FF003F62'}};
        ws.getCell('I'+(lastRow+2)).value = {formula:'SUM(I'+firstRow+':I'+lastRow+')'};
        ws.getCell('I'+(lastRow+2)).numFmt = '#,##0"đ"';
        ws.getCell('I'+(lastRow+2)).font = {bold:true, size:14, color:{argb:'FFF0B840'}};
        
        wb.calcProperties.fullCalcOnLoad = true;
        var buf = await wb.xlsx.writeBuffer();
        var blob = new Blob([buf], {type:'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'});
        var url = URL.createObjectURL(blob);
        var a = document.createElement('a');
        a.href = url;
        a.download = code + '.xlsx';
        document.body.appendChild(a);
        a.click();
        setTimeout(function(){ document.body.removeChild(a); URL.revokeObjectURL(url); }, 30000);
        
        console.log('[VAI] Excel export OK - hình ảnh 100px');
        if(typeof showToast === 'function') showToast('✅ Excel OK - Hình ảnh 100px');
        
    }catch(e){
        console.error('[VAI] Excel error:', e);
        alert('Lỗi: '+e.message);
    }
};

console.log('[VAI v1102] Excel fix loaded - 100px images ready');