// Google Opal AI - iOS Studio & 3D Poster Lab Engine

document.addEventListener('DOMContentLoaded', () => {
  initNavigation();
  initSettings();
  initPosterLab();
  initInboxAI();
  initHistory();
});

// --- 1. Tab Navigation ---
function initNavigation() {
  const navItems = document.querySelectorAll('.nav-item');
  const tabPages = document.querySelectorAll('.tab-page');

  navItems.forEach(item => {
    item.addEventListener('click', () => {
      const targetTabId = item.getAttribute('data-tab');
      
      navItems.forEach(n => n.classList.remove('active'));
      tabPages.forEach(p => p.classList.remove('active'));

      item.classList.add('active');
      const targetPage = document.getElementById(targetTabId);
      if (targetPage) targetPage.classList.add('active');
      window.scrollTo({ top: 0, behavior: 'smooth' });
    });
  });

  // Language Toggle
  const langBtn = document.getElementById('langToggleBtn');
  let currentLang = 'BN';
  langBtn.addEventListener('click', () => {
    currentLang = currentLang === 'BN' ? 'EN' : 'BN';
    langBtn.textContent = currentLang === 'BN' ? '🌐 বাং' : '🌐 EN';
  });
}

// Global App Switcher
window.openAppRunner = function(appType) {
  if (appType === 'inbox_ai') {
    document.querySelector('.nav-item[data-tab="tabInboxAI"]').click();
  } else {
    document.querySelector('.nav-item[data-tab="tabPosterLab"]').click();
  }
};

window.copyText = function(elementId) {
  const el = document.getElementById(elementId);
  if (el && el.textContent) {
    navigator.clipboard.writeText(el.textContent).then(() => {
      alert('✅ Copied to Clipboard!');
    });
  }
};

// --- 2. Settings & Gemini/Gemma API ---
function initSettings() {
  const apiKeyInput = document.getElementById('apiKeyInput');
  const modelSelect = document.getElementById('modelSelect');
  const n8nWebhookInput = document.getElementById('n8nWebhookInput');
  const saveBtn = document.getElementById('saveApiKeyBtn');
  const statusMsg = document.getElementById('settingsStatusMsg');

  // Load saved settings
  const savedKey = localStorage.getItem('opal_gemini_api_key') || '';
  const savedModel = localStorage.getItem('opal_selected_model') || 'gemini-3.6-flash';
  const savedN8n = localStorage.getItem('opal_n8n_webhook') || 'https://n8n.auraajenticai.cloud/webhook/gt-auto-post';
  apiKeyInput.value = savedKey;
  modelSelect.value = savedModel;
  if (n8nWebhookInput) n8nWebhookInput.value = savedN8n;

  saveBtn.addEventListener('click', async () => {
    const key = apiKeyInput.value.trim();
    const model = modelSelect.value;
    const n8nUrl = n8nWebhookInput ? n8nWebhookInput.value.trim() : '';

    if (n8nUrl) {
      localStorage.setItem('opal_n8n_webhook', n8nUrl);
    }
    
    if (!key) {
      alert('Settings saved!');
      return;
    }

    statusMsg.classList.remove('hidden');
    statusMsg.style.color = '#F472B6';
    statusMsg.textContent = '⏳ Testing AI connection with Google...';

    try {
      const res = await callGeminiApi(key, model, "Respond with: 'Opal AI Connected successfully!'");
      if (res) {
        localStorage.setItem('opal_gemini_api_key', key);
        localStorage.setItem('opal_selected_model', model);
        statusMsg.style.color = '#10B981';
        statusMsg.textContent = `✅ Settings Saved & Verified: ${res.trim()}`;
      }
    } catch (e) {
      statusMsg.style.color = '#EF4444';
      statusMsg.textContent = `❌ Error: ${e.message}`;
    }
  });
}

async function callGeminiApi(apiKey, model, prompt) {
  const url = `https://generativelanguage.googleapis.com/v1beta/models/${model}:generateContent?key=${apiKey}`;
  const payload = {
    contents: [{ parts: [{ text: prompt }] }],
    generationConfig: { temperature: 0.7, maxOutputTokens: 2048 }
  };

  const response = await fetch(url, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(payload)
  });

  if (!response.ok) {
    const errData = await response.json();
    throw new Error(errData?.error?.message || `HTTP ${response.status}`);
  }

  const data = await response.json();
  return data?.candidates?.[0]?.content?.parts?.[0]?.text || '';
}

// --- 3. 3D Poster Lab Engine (True 3D Dual-Tier Gold Podium) ---
function initPosterLab() {
  const productInput = document.getElementById('productInput');
  const productPrice = document.getElementById('productPrice');
  const photoFileInput = document.getElementById('photoFileInput');
  const clearPhotoBtn = document.getElementById('clearPhotoBtn');
  const photoPreviewContainer = document.getElementById('photoPreviewContainer');
  const attachedPhotoImg = document.getElementById('attachedPhotoImg');
  const generatePosterBtn = document.getElementById('generatePosterBtn');
  const posterStatusText = document.getElementById('posterStatusText');
  const posterResultCard = document.getElementById('posterResultCard');
  const posterCanvas = document.getElementById('posterCanvas');
  const downloadPosterBtn = document.getElementById('downloadPosterBtn');
  const shareWhatsAppBtn = document.getElementById('shareWhatsAppBtn');

  let attachedImageBitmap = null;

  // Photo Input change
  photoFileInput.addEventListener('change', (e) => {
    const file = e.target.files[0];
    if (file) {
      const reader = new FileReader();
      reader.onload = (event) => {
        attachedPhotoImg.src = event.target.result;
        photoPreviewContainer.classList.remove('hidden');
        clearPhotoBtn.classList.remove('hidden');

        const img = new Image();
        img.onload = () => { attachedImageBitmap = img; };
        img.src = event.target.result;
      };
      reader.readAsDataURL(file);
    }
  });

  clearPhotoBtn.addEventListener('click', () => {
    photoFileInput.value = '';
    attachedImageBitmap = null;
    photoPreviewContainer.classList.add('hidden');
    clearPhotoBtn.classList.add('hidden');
  });

  // Generate 3D Poster
  generatePosterBtn.addEventListener('click', async () => {
    const inputVal = productInput.value.trim();
    const priceVal = productPrice.value.trim();

    posterStatusText.classList.remove('hidden');
    posterStatusText.textContent = '⏳ Resolving product image & rendering 3D gold stage...';
    generatePosterBtn.disabled = true;

    try {
      let productImg = attachedImageBitmap;
      let title = "Authentic Korean K-Beauty Care";

      if (!productImg) {
        // Universal Product / Image Link Resolver
        const resolved = await resolveProductUrl(inputVal);
        if (resolved && resolved.imageUrl) {
          title = resolved.title || inputVal;
          productImg = await loadImage(resolved.imageUrl);
        } else {
          // Fallback packshot image
          const fallbackUrl = `https://image.pollinations.ai/prompt/${encodeURIComponent(inputVal + " luxury cosmetic container jar bottle on podium 8k")}?width=1024&height=1024&nologo=true`;
          productImg = await loadImage(fallbackUrl);
          title = inputVal;
        }
      }

      if (productImg) {
        // Render True 3D Poster on Canvas
        await render3DCommercialPoster(posterCanvas, productImg, title, priceVal);
        posterResultCard.classList.remove('hidden');
        posterStatusText.classList.add('hidden');
        posterResultCard.scrollIntoView({ behavior: 'smooth' });

        // Save to History
        saveGenerationToHistory({
          type: '3D Poster',
          title: title,
          price: priceVal,
          date: new Date().toLocaleTimeString()
        });
      } else {
        posterStatusText.textContent = '❌ Failed to load product image. Please check link.';
      }
    } catch (err) {
      posterStatusText.textContent = `❌ Error: ${err.message}`;
    }

    generatePosterBtn.disabled = false;
  });

  // Download Button (Save to iPhone Camera Roll)
  downloadPosterBtn.addEventListener('click', () => {
    const link = document.createElement('a');
    link.download = `GT_Poster_${Date.now()}.jpg`;
    link.href = posterCanvas.toDataURL('image/jpeg', 0.95);
    link.click();
  });

  // WhatsApp Order Button
  shareWhatsAppBtn.addEventListener('click', () => {
    const text = encodeURIComponent(`✨ 100% Authentic Korean Skincare Order!\nProduct: ${productInput.value}\nPrice: ${productPrice.value}\nWebsite: https://glamourstouch.com`);
    window.open(`https://wa.me/8801712426871?text=${text}`, '_blank');
  });

  // 1-Click Auto Post to Facebook Page (via n8n Webhook)
  const autoPostN8nBtn = document.getElementById('autoPostN8nBtn');
  const n8nPostStatusMsg = document.getElementById('n8nPostStatusMsg');

  if (autoPostN8nBtn) {
    autoPostN8nBtn.addEventListener('click', async () => {
      const webhookUrl = localStorage.getItem('opal_n8n_webhook');
      if (!webhookUrl) {
        alert('⚠️ Please set your n8n Webhook URL in Settings first!');
        document.querySelector('.nav-item[data-tab="tabSettings"]').click();
        return;
      }

      n8nPostStatusMsg.classList.remove('hidden');
      n8nPostStatusMsg.style.color = '#38BDF8';
      n8nPostStatusMsg.textContent = '⏳ Sending 3D poster & caption to n8n Webhook...';
      autoPostN8nBtn.disabled = true;

      try {
        const posterDataUrl = posterCanvas.toDataURL('image/jpeg', 0.92);
        const payload = {
          title: productInput.value.trim() || 'Authentic Korean K-Beauty Skincare',
          price: productPrice.value.trim() || '৳ ১,০৬০',
          caption: `✨ ${productInput.value.trim()} ✨\n\n💰 অফার মূল্য: ${productPrice.value.trim()}\n🛡️ ১০০% অরিজিনাল কোরিয়ান কসমেটিক্স গ্যারান্টি!\n\n💬 সরাসরি WhatsApp এ অর্ডার করতে ইনবক্স করুন:\n👉 https://wa.me/8801712426871\n📞 হটলাইন: 01712-426871\n🌐 ওয়েবসাইট: https://glamourstouch.com`,
          image_url: posterDataUrl,
          store: "Glamour's Touch",
          website: "https://glamourstouch.com",
          whatsapp: "01712-426871",
          timestamp: new Date().toISOString()
        };

        const res = await fetch(webhookUrl, {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(payload)
        });

        if (res.ok) {
          const resData = await res.json().catch(() => ({}));
          n8nPostStatusMsg.style.color = '#10B981';
          n8nPostStatusMsg.textContent = `✅ ${resData.message || '🎉 পোস্টটি সফলভাবে n8n-এর মাধ্যমে Facebook Page-এ পাবলিশ হয়েছে!'}`;
        } else {
          n8nPostStatusMsg.style.color = '#EF4444';
          n8nPostStatusMsg.textContent = `❌ n8n Webhook returned HTTP ${res.status}`;
        }
      } catch (err) {
        n8nPostStatusMsg.style.color = '#EF4444';
        n8nPostStatusMsg.textContent = `❌ Connection Error: ${err.message}`;
      }

      autoPostN8nBtn.disabled = false;
    });
  }
}

// Universal Link & Product Name Resolver
async function resolveProductUrl(input) {
  if (!input) return null;
  if (input.match(/\.(jpeg|jpg|gif|png|webp)($|\?)/i)) {
    return { title: 'Authentic Korean Product', imageUrl: input };
  }

  const key = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6ImZtY2x0cmpudXZ1b29hcmt2dWZuIiwicm9sZSI6ImFub24iLCJpYXQiOjE3NzUxMzY3MDQsImV4cCI6MjA5MDcxMjcwNH0.PkSgBAZx41X4sZurfyOdxCVa01hkKTkyBhVkGzx_4y4';

  // 1. Glamour's Touch Supabase UUID regex
  const uuidMatch = input.match(/[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}/);
  if (uuidMatch) {
    const productId = uuidMatch[0];
    try {
      const res = await fetch(`https://fmcltrjnuvuooarkvufn.supabase.co/rest/v1/products?id=eq.${productId}&select=*`, {
        headers: { 'apikey': key, 'Authorization': `Bearer ${key}` }
      });
      const data = await res.json();
      if (data && data.length > 0) {
        const p = data[0];
        return {
          title: p.name || 'Authentic Korean Skincare',
          price: p.price ? '৳ ' + p.price : '',
          imageUrl: p.image || p.image_url || (p.images && p.images[0]) || ''
        };
      }
    } catch (e) {
      console.warn('GT Supabase fetch by ID failed:', e);
    }
  }

  // 2. Search Supabase by product Name
  try {
    const cleanQuery = encodeURIComponent(input.replace(/https?:\/\/[^\s]+/g, '').trim().slice(0, 30));
    if (cleanQuery) {
      const res = await fetch(`https://fmcltrjnuvuooarkvufn.supabase.co/rest/v1/products?name=ilike.*${cleanQuery}*&select=*&limit=1`, {
        headers: { 'apikey': key, 'Authorization': `Bearer ${key}` }
      });
      const data = await res.json();
      if (data && data.length > 0) {
        const p = data[0];
        return {
          title: p.name || input,
          price: p.price ? '৳ ' + p.price : '',
          imageUrl: p.image || p.image_url || (p.images && p.images[0]) || ''
        };
      }
    }
  } catch (e) {
    console.warn('GT Supabase search by name failed:', e);
  }

  // 3. Fallback to 1st featured product in catalog
  try {
    const res = await fetch(`https://fmcltrjnuvuooarkvufn.supabase.co/rest/v1/products?in_stock=eq.true&image=not.is.null&limit=1`, {
      headers: { 'apikey': key, 'Authorization': `Bearer ${key}` }
    });
    const data = await res.json();
    if (data && data.length > 0) {
      const p = data[0];
      return {
        title: p.name || input,
        price: p.price ? '৳ ' + p.price : '',
        imageUrl: p.image || ''
      };
    }
  } catch (e) {
    console.warn('Fallback failed:', e);
  }

  return { title: input, imageUrl: 'https://fmcltrjnuvuooarkvufn.supabase.co/storage/v1/object/public/products/product-images/koba-74d48daa-7695-41f9-8f10-9e5fb4f0e2d9.jpg' };
}

function loadImage(src) {
  return new Promise((resolve, reject) => {
    let loadUrl = src;
    if (src.startsWith('http://') || src.startsWith('https://')) {
      loadUrl = 'https://images.weserv.nl/?url=' + encodeURIComponent(src) + '&output=jpg&q=95';
    }

    const img = new Image();
    img.crossOrigin = 'anonymous';
    img.onload = () => resolve(img);
    img.onerror = () => {
      const fallbackImg = new Image();
      fallbackImg.crossOrigin = 'anonymous';
      fallbackImg.onload = () => resolve(fallbackImg);
      fallbackImg.onerror = () => reject(new Error('Could not load image across CORS'));
      fallbackImg.src = src;
    };
    img.src = loadUrl;
  });
}

// --- 4. Masterpiece 3D Canvas Rendering Engine ---
async function render3DCommercialPoster(canvas, productImg, title, price) {
  const ctx = canvas.getContext('2d');
  const w = 1080;
  const h = 1080;

  // 1. Midnight Obsidian Background
  const bgGrad = ctx.createRadialGradient(w / 2, h * 0.44, 50, w / 2, h * 0.44, w * 0.72);
  bgGrad.addColorStop(0, '#18212D');
  bgGrad.addColorStop(0.6, '#0C1117');
  bgGrad.addColorStop(1, '#05080C');
  ctx.fillStyle = bgGrad;
  ctx.fillRect(0, 0, w, h);

  // 2. White-to-Midnight Luxury Radial Spotlight (Smooth Studio Blend)
  const stageCx = w / 2;
  const stageCy = h * 0.44;
  const stageRadius = w * 0.38;

  const spotGrad = ctx.createRadialGradient(stageCx, stageCy, 0, stageCx, stageCy, stageRadius);
  spotGrad.addColorStop(0, '#FFFFFF');
  spotGrad.addColorStop(0.46, '#FFFFFF');
  spotGrad.addColorStop(0.64, '#F0F5FA');
  spotGrad.addColorStop(0.82, '#8E9FAC');
  spotGrad.addColorStop(0.94, '#283545');
  spotGrad.addColorStop(1, '#0C1117');

  ctx.fillStyle = spotGrad;
  ctx.beginPath();
  ctx.arc(stageCx, stageCy, stageRadius, 0, Math.PI * 2);
  ctx.fill();

  // Luxury Gold Dashed Rings
  ctx.strokeStyle = '#66E5B83A';
  ctx.lineWidth = 2.5;
  ctx.beginPath();
  ctx.arc(stageCx, stageCy, stageRadius * 0.96, 0, Math.PI * 2);
  ctx.stroke();

  ctx.strokeStyle = '#99E5B83A';
  ctx.lineWidth = 1.8;
  ctx.setLineDash([12, 12]);
  ctx.beginPath();
  ctx.arc(stageCx, stageCy, stageRadius * 0.91, 0, Math.PI * 2);
  ctx.stroke();
  ctx.setLineDash([]);

  // 3. True 3D Dual-Tier Cylindrical Podium
  // --- TIER 1: Lower Base ---
  const baseTierY = 745;
  const baseTierRx = w * 0.38;
  const baseTierRy = 34;
  const baseTierHeight = 26;

  // Tier 1 Ground Shadow
  const baseShadow = ctx.createRadialGradient(stageCx, baseTierY + baseTierHeight + 16, 20, stageCx, baseTierY + baseTierHeight + 16, baseTierRx * 1.15);
  baseShadow.addColorStop(0, 'rgba(0,0,0,0.7)');
  baseShadow.addColorStop(1, 'transparent');
  ctx.fillStyle = baseShadow;
  drawOval(ctx, stageCx, baseTierY + baseTierHeight + baseTierRy * 0.6, baseTierRx * 1.15, baseTierRy * 1.6);

  // Tier 1 Cylinder Body
  const baseCylGrad = ctx.createLinearGradient(stageCx - baseTierRx, 0, stageCx + baseTierRx, 0);
  baseCylGrad.addColorStop(0, '#090D12');
  baseCylGrad.addColorStop(0.2, '#1C2633');
  baseCylGrad.addColorStop(0.5, '#6C829E');
  baseCylGrad.addColorStop(0.8, '#1C2633');
  baseCylGrad.addColorStop(1, '#090D12');
  ctx.fillStyle = baseCylGrad;
  ctx.fillRect(stageCx - baseTierRx, baseTierY, baseTierRx * 2, baseTierHeight);
  drawOval(ctx, stageCx, baseTierY + baseTierHeight, baseTierRx, baseTierRy);

  // Tier 1 Top Cap
  const baseTopGrad = ctx.createLinearGradient(stageCx - baseTierRx, baseTierY - baseTierRy, stageCx + baseTierRx, baseTierY + baseTierRy);
  baseTopGrad.addColorStop(0, '#222D3A');
  baseTopGrad.addColorStop(1, '#0B1017');
  ctx.fillStyle = baseTopGrad;
  drawOval(ctx, stageCx, baseTierY, baseTierRx, baseTierRy);

  // --- TIER 2: Upper Product Pedestal ---
  const topTierY = 708;
  const topTierRx = w * 0.31;
  const topTierRy = 28;
  const topTierHeight = 34;

  // Tier 2 Cylinder Body
  const topCylGrad = ctx.createLinearGradient(stageCx - topTierRx, 0, stageCx + topTierRx, 0);
  topCylGrad.addColorStop(0, '#070A0E');
  topCylGrad.addColorStop(0.25, '#18212C');
  topCylGrad.addColorStop(0.5, '#F5E6AB');
  topCylGrad.addColorStop(0.75, '#18212C');
  topCylGrad.addColorStop(1, '#070A0E');
  ctx.fillStyle = topCylGrad;
  ctx.fillRect(stageCx - topTierRx, topTierY, topTierRx * 2, topTierHeight);
  drawOval(ctx, stageCx, topTierY + topTierHeight, topTierRx, topTierRy);

  // Tier 2 Top Surface (Glossy White/Platinum Cap)
  const topSurfaceGrad = ctx.createRadialGradient(stageCx, topTierY, 0, stageCx, topTierY, topTierRx);
  topSurfaceGrad.addColorStop(0, '#FFFFFF');
  topSurfaceGrad.addColorStop(0.45, '#EBF2F8');
  topSurfaceGrad.addColorStop(0.8, '#899EAF');
  topSurfaceGrad.addColorStop(1, '#1B2533');
  ctx.fillStyle = topSurfaceGrad;
  drawOval(ctx, stageCx, topTierY, topTierRx, topTierRy);

  // Tier 2 Top Gold Beveled Rim
  const goldRimGrad = ctx.createLinearGradient(stageCx - topTierRx, topTierY, stageCx + topTierRx, topTierY);
  goldRimGrad.addColorStop(0, '#B38728');
  goldRimGrad.addColorStop(0.5, '#FFFFFF');
  goldRimGrad.addColorStop(1, '#AA771C');
  ctx.strokeStyle = goldRimGrad;
  ctx.lineWidth = 3.5;
  strokeOval(ctx, stageCx, topTierY, topTierRx, topTierRy);

  // 4. Hero Product Scaling & Placement
  const targetH = 500;
  const targetW = 520;
  const srcW = productImg.width || 500;
  const srcH = productImg.height || 500;
  const scale = Math.min(targetW / srcW, targetH / srcH);
  const destW = srcW * scale;
  const destH = srcH * scale;
  const destLeft = (w - destW) / 2;
  const destTop = topTierY - destH + 18;

  // 4.1 Glossy Mirror Product Reflection (Multiply blended)
  ctx.save();
  ctx.globalCompositeOperation = 'multiply';
  ctx.globalAlpha = 0.25;
  ctx.translate(0, (topTierY + 6) * 2);
  ctx.scale(1, -1);
  ctx.drawImage(productImg, destLeft, topTierY + 6, destW, destH * 0.35);
  ctx.restore();

  // Contact Drop Shadow
  const contactShadow = ctx.createRadialGradient(stageCx, topTierY, 10, stageCx, topTierY, destW * 0.4);
  contactShadow.addColorStop(0, 'rgba(0,0,0,0.8)');
  contactShadow.addColorStop(1, 'transparent');
  ctx.fillStyle = contactShadow;
  drawOval(ctx, stageCx, topTierY + 2, destW * 0.38, 12);

  // Draw Hero Product with Multiply Blend Mode (removes white background completely)
  ctx.save();
  ctx.globalCompositeOperation = 'multiply';
  ctx.drawImage(productImg, destLeft, destTop, destW, destH);
  ctx.restore();

  // 5. Value Trust Badges
  drawPillBadge(ctx, 40, 240, '🇰🇷 100% Original Korea', true);
  drawPillBadge(ctx, 40, 315, '🌿 Skin Friendly Formula', true);
  drawPillBadge(ctx, w - 40, 240, '⚡ Fast Delivery BD', false);
  drawPillBadge(ctx, w - 40, 315, '🛡️ Authentic Guarantee', false);

  // 6. Top Header Ribbon
  ctx.fillStyle = '#F2090D12';
  ctx.fillRect(0, 0, w, 92);
  
  ctx.strokeStyle = '#E5B83A';
  ctx.lineWidth = 3;
  ctx.beginPath();
  ctx.moveTo(0, 92);
  ctx.lineTo(w, 92);
  ctx.stroke();

  ctx.fillStyle = '#E5B83A';
  ctx.font = 'bold 34px Plus Jakarta Sans, sans-serif';
  ctx.textAlign = 'center';
  ctx.fillText('✨ GLAMOUR\'S TOUCH ✨', w / 2, 52);

  ctx.fillStyle = '#FFF4D0';
  ctx.font = '17px Plus Jakarta Sans, sans-serif';
  ctx.fillText('대한민국 프리미엄 스킨케어 • 100% AUTHENTIC KOREAN COSMETICS', w / 2, 80);

  // 7. Product Title Card
  const cleanTitle = title.length > 60 ? title.substring(0, 58) + '...' : title;
  const titleCardTop = h - 235;
  const titleCardBottom = h - 128;
  
  ctx.fillStyle = '#EA0B0E14';
  roundRect(ctx, 28, titleCardTop, w - 56, titleCardBottom - titleCardTop, 18);
  ctx.fill();

  ctx.strokeStyle = '#55E5B83A';
  ctx.lineWidth = 2;
  roundRect(ctx, 28, titleCardTop, w - 56, titleCardBottom - titleCardTop, 18);
  ctx.stroke();

  ctx.fillStyle = '#FFFFFF';
  ctx.font = 'bold 27px Plus Jakarta Sans, Hind Siliguri, sans-serif';
  ctx.textAlign = 'center';
  ctx.fillText(cleanTitle, w / 2, titleCardTop + 42);

  ctx.fillStyle = '#E5B83A';
  ctx.font = 'bold 20px Hind Siliguri, sans-serif';
  ctx.fillText('গ্লাস স্কিন ও দাগহীন উজ্জ্বলতার কোরিয়ান সিক্রেট • সরাসরি কোরিয়া থেকে আমদানিকৃত', w / 2, titleCardTop + 78);

  // 8. Bottom WhatsApp Order Ribbon (Green Banner)
  const footerTop = h - 118;
  const footerGrad = ctx.createLinearGradient(0, footerTop, w, h);
  footerGrad.addColorStop(0, '#25D366');
  footerGrad.addColorStop(1, '#1EB855');
  ctx.fillStyle = footerGrad;
  ctx.fillRect(0, footerTop, w, 118);

  ctx.fillStyle = '#FFFFFF';
  ctx.font = 'bold 32px Plus Jakarta Sans, sans-serif';
  ctx.textAlign = 'left';
  ctx.fillText('💬 WhatsApp: 01712-426871', 35, footerTop + 48);

  ctx.fillStyle = '#053314';
  ctx.font = 'bold 21px Plus Jakarta Sans, sans-serif';
  ctx.fillText('🌐 Website: glamourstouch.com  •  📞 Call: 01712-426871', 35, footerTop + 90);

  // 8.1 Render Scannable QR Code on Bottom Right
  await drawWhatsAppQrOnCanvas(ctx, w - 130, footerTop + 11, 96);

  // 9. Outer Gold Frame Edge
  ctx.strokeStyle = '#88E5B83A';
  ctx.lineWidth = 6;
  ctx.strokeRect(3, 3, w - 6, h - 6);
}

function drawOval(ctx, cx, cy, rx, ry) {
  ctx.beginPath();
  ctx.ellipse(cx, cy, rx, ry, 0, 0, Math.PI * 2);
  ctx.fill();
}

function strokeOval(ctx, cx, cy, rx, ry) {
  ctx.beginPath();
  ctx.ellipse(cx, cy, rx, ry, 0, 0, Math.PI * 2);
  ctx.stroke();
}

function roundRect(ctx, x, y, width, height, radius) {
  ctx.beginPath();
  ctx.moveTo(x + radius, y);
  ctx.lineTo(x + width - radius, y);
  ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
  ctx.lineTo(x + width, y + height - radius);
  ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
  ctx.lineTo(x + radius, y + height);
  ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
  ctx.lineTo(x, y + radius);
  ctx.quadraticCurveTo(x, y, x + radius, y);
  ctx.closePath();
}

function drawPillBadge(ctx, x, y, text, isLeft) {
  ctx.font = 'bold 18px Plus Jakarta Sans, Hind Siliguri, sans-serif';
  const textWidth = ctx.measureText(text).width;
  const pillW = textWidth + 28;
  const pillH = 36;
  const pillX = isLeft ? x : x - pillW;
  const pillY = y - 22;

  ctx.fillStyle = '#D90E141B';
  roundRect(ctx, pillX, pillY, pillW, pillH, 18);
  ctx.fill();

  ctx.strokeStyle = '#55E5B83A';
  ctx.lineWidth = 1.5;
  roundRect(ctx, pillX, pillY, pillW, pillH, 18);
  ctx.stroke();

  ctx.fillStyle = '#FFF0C8';
  ctx.textAlign = 'left';
  ctx.fillText(text, pillX + 14, pillY + 24);
}

async function drawWhatsAppQrOnCanvas(ctx, x, y, size) {
  // White background container
  ctx.fillStyle = '#FFFFFF';
  roundRect(ctx, x - 4, y - 4, size + 8, size + 8, 10);
  ctx.fill();

  // Create temporary QR element
  const qrContainer = document.getElementById('qrcodeHidden');
  qrContainer.innerHTML = '';
  new QRCode(qrContainer, {
    text: 'https://wa.me/8801712426871',
    width: size,
    height: size,
    colorDark: '#0B2E13',
    colorLight: '#FFFFFF',
    correctLevel: QRCode.CorrectLevel.M
  });

  await new Promise(r => setTimeout(r, 80));
  const qrImg = qrContainer.querySelector('img') || qrContainer.querySelector('canvas');
  if (qrImg) {
    ctx.drawImage(qrImg, x, y, size, size);
  }
}

// --- 5. Customer Care & Inbox AI ---
function initInboxAI() {
  const customerMsgInput = document.getElementById('inboxCustomerMsg');
  const storeContextInput = document.getElementById('inboxStoreContext');
  const generateBtn = document.getElementById('generateInboxReplyBtn');
  const statusMsg = document.getElementById('inboxStatusMsg');
  const repliesCard = document.getElementById('inboxRepliesCard');
  const reply1 = document.getElementById('replyText1');
  const reply2 = document.getElementById('replyText2');
  const reply3 = document.getElementById('replyText3');

  generateBtn.addEventListener('click', async () => {
    const query = customerMsgInput.value.trim();
    const storeInfo = storeContextInput.value.trim();
    const apiKey = localStorage.getItem('opal_gemini_api_key') || '';
    const model = localStorage.getItem('opal_selected_model') || 'gemini-3.6-flash';

    if (!query) {
      alert('Please enter a customer message');
      return;
    }

    statusMsg.classList.remove('hidden');
    statusMsg.textContent = '⏳ Generating 3 sweet & polite sales replies with Gemma AI...';
    generateBtn.disabled = true;

    try {
      if (apiKey) {
        const prompt = `A customer sent this message in Glamour's Touch inbox:
'${query}'
Store Info: ${storeInfo}

Write 3 ready-to-copy customer responses in natural, sweet BENGALI (বাংলা).
Format exactly with:
---REPLY1---
(Instant polite greeting and direct answer with price & benefits)
---REPLY2---
(Order confirmation closer asking for Name, Address, and Phone number)
---REPLY3---
(1-click WhatsApp order link: https://wa.me/8801712426871 and hotline 01712-426871)`;

        const result = await callGeminiApi(apiKey, model, prompt);
        const parts = result.split(/---REPLY[123]---/);
        
        reply1.textContent = (parts[1] || 'আসসালামু আলাইকুম প্রিয় কাস্টমার! আমাদের গ্লাস স্কিন সিরামের দাম মাত্র ৳১৬০০। এটি ১০০% আসল কোরিয়ান প্রডাক্ট।').trim();
        reply2.textContent = (parts[2] || 'অর্ডারটি কনফার্ম করতে আপনার নাম, সম্পূর্ণ ঠিকানা এবং মোবাইল নম্বরটি লিখে পাঠান। আমরা দ্রুত ক্যাশ অন ডেলিভারিতে পাঠিয়ে দেবো!').trim();
        reply3.textContent = (parts[3] || 'সরাসরি হোয়াটসঅ্যাপে দ্রুত অর্ডার করতে ক্লিক করুন: https://wa.me/8801712426871\nহটলাইন: 01712-426871').trim();
      } else {
        // High quality offline fallback template
        reply1.textContent = `আসসালামু আলাইকুম প্রিয় আপু/ভাইয়া! 🥰\nআমাদের কাছে ১০০% অরিজিনাল কোরিয়ান স্কিনকেয়ার প্রোডাক্ট রয়েছে।\n\n💰 অফার মূল্য: ৳ ১,০৬০ (রেগুলার ৳ ১,৪৭০)\n🚚 হোম ডেলিভারি: ঢাকায় ৳৭০, ঢাকার বাইরে ৳১৩০\n\nএটি নিয়মিত ব্যবহারে ত্বক হবে কাচের মতো চকচকে ও দাগহীন! 🌸`;
        reply2.textContent = `অর্ডারটি কনফার্ম করতে অনুগ্রহ করে আপনার:\n১. নাম\n২. সম্পূর্ণ ঠিকানা (জেলা/থানা সহ)\n৩. মোবাইল নম্বর\n\nলিখে পাঠিয়ে দিন। আমরা দ্রুত প্রোডাক্ট পাঠিয়ে দেবো! ধন্যবাদ। 🛍️`;
        reply3.textContent = `সরাসরি হোয়াটসঅ্যাপে ১-ক্লিকে অর্ডার করতে আমাদের ইনবক্স করুন:\n💬 WhatsApp: https://wa.me/8801712426871\n📞 হটলাইন: 01712-426871\n🌐 ওয়েবসাইট: https://glamourstouch.com`;
      }

      repliesCard.classList.remove('hidden');
      statusMsg.classList.add('hidden');
      repliesCard.scrollIntoView({ behavior: 'smooth' });
    } catch (e) {
      statusMsg.textContent = `❌ Error: ${e.message}`;
    }

    generateBtn.disabled = false;
  });
}

// --- 6. History Management ---
function initHistory() {
  const historyContainer = document.getElementById('historyListContainer');
  const clearBtn = document.getElementById('clearHistoryBtn');

  function renderHistory() {
    const list = JSON.parse(localStorage.getItem('opal_history') || '[]');
    if (list.length === 0) {
      historyContainer.innerHTML = `
        <div class="empty-state">
          <span class="icon-empty">📭</span>
          <p>No generations yet. Create your first 3D poster or copy!</p>
        </div>`;
      return;
    }

    historyContainer.innerHTML = list.map(item => `
      <div class="app-card">
        <div class="app-icon">${item.type === '3D Poster' ? '🎨' : '💬'}</div>
        <div class="app-info">
          <h3>${item.title}</h3>
          <p>${item.price || item.type}</p>
          <span class="meta-tag">Saved at ${item.date}</span>
        </div>
      </div>
    `).join('');
  }

  clearBtn.addEventListener('click', () => {
    localStorage.removeItem('opal_history');
    renderHistory();
  });

  renderHistory();
}

function saveGenerationToHistory(item) {
  const list = JSON.parse(localStorage.getItem('opal_history') || '[]');
  list.unshift(item);
  localStorage.setItem('opal_history', JSON.stringify(list.slice(0, 30)));
}