const mongoose = require('mongoose');
const dotenv = require('dotenv');
dotenv.config();

const User = require('../models/User');
const Product = require('../models/Product');
const Category = require('../models/Category');
const Brand = require('../models/Brand');
const Banner = require('../models/Banner');
const Coupon = require('../models/Coupon');
const WebsiteSettings = require('../models/WebsiteSettings');
const SocialMedia = require('../models/SocialMedia');
const EmailTemplate = require('../models/EmailTemplate');
const Review = require('../models/Review');

const {
  seedUsers,
  seedCategories,
  seedBrands,
  seedBanners,
  seedCoupons,
  seedSocialMedia,
  seedEmailTemplates
} = require('./seedData');

const seedDB = async () => {
  try {
    await mongoose.connect(process.env.MONGODB_URI || 'mongodb://127.0.0.1:27017/guitar_ecommerce');
    console.log('[SEEDER]: Connected to MongoDB');

    // Clear existing collections
    await User.deleteMany();
    await Product.deleteMany();
    await Category.deleteMany();
    await Brand.deleteMany();
    await Banner.deleteMany();
    await Coupon.deleteMany();
    await WebsiteSettings.deleteMany();
    await SocialMedia.deleteMany();
    await EmailTemplate.deleteMany();
    await Review.deleteMany();

    console.log('[SEEDER]: Cleaned old collections');

    // 1. Insert Users
    const users = await User.create(seedUsers);
    const adminUser = users.find(u => u.role === 'Admin');
    const customerUser = users.find(u => u.role === 'Customer');

    // 2. Insert Categories
    const categories = await Category.create(seedCategories);
    const catMap = {};
    categories.forEach(c => { catMap[c.slug] = c._id; });

    // 3. Insert Brands
    const brands = await Brand.create(seedBrands);
    const brandMap = {};
    brands.forEach(b => { brandMap[b.slug] = b._id; });

    // 4. Seed Products with INR Prices (₹) and Full Specs
    const seedProducts = [
      {
        name: 'Fender Player II Stratocaster Electric Guitar',
        slug: 'fender-player-ii-stratocaster-electric-guitar',
        sku: 'GTR-2026-10001',
        brand: brandMap['fender'],
        category: catMap['electric-guitars'],
        price: 74999,
        salePrice: 69999,
        discountType: 'fixed',
        discountValue: 5000,
        stock: 15,
        description: 'The Fender Player II Stratocaster radiates authentic Fender style and modern playability. Featuring an Alder body, Maple neck with Modern C profile, Rosewood fingerboard, and Alnico V Single-Coil pickups for pristine bell-like highs.',
        shortDescription: 'Modern C Maple Neck, Alnico V Pickups, Rosewood Fingerboard',
        images: [
          'https://images.unsplash.com/photo-1564186763535-ebb21ef5277f?w=800',
          'https://images.unsplash.com/photo-1550291652-6ea9114a47b1?w=800'
        ],
        specs: {
          guitarType: 'Electric',
          bodyShape: 'Stratocaster',
          bodyMaterial: 'Alder',
          topMaterial: 'None',
          neckMaterial: 'Maple',
          fingerboardMaterial: 'Rosewood',
          scaleLength: '25.5"',
          numberOfStrings: 6,
          frets: 22,
          pickupConfiguration: 'SSS',
          pickupType: 'Player Series Alnico 5 Single-Coil',
          bridgeType: '2-Point Synchronized Tremolo with Bent Steel Saddles',
          tuningMachines: 'Standard Cast/Sealed',
          handOrientation: 'Right-Handed',
          color: '3-Color Sunburst',
          finish: 'Gloss Polyester',
          includesCase: false
        },
        variants: [
          { color: '3-Color Sunburst', colorHex: '#8B4513', finish: 'Gloss', sku: 'GTR-2026-10001-SB', price: 74999, salePrice: 69999, stock: 8 },
          { color: 'Polar White', colorHex: '#FFFFFF', finish: 'Gloss', sku: 'GTR-2026-10001-WH', price: 74999, salePrice: 69999, stock: 7 }
        ],
        rating: 4.9,
        numReviews: 24,
        isFeatured: true,
        isNewArrival: true,
        isBestSeller: true
      },
      {
        name: 'Gibson Les Paul Standard 60s Bourbon Burst',
        slug: 'gibson-les-paul-standard-60s-bourbon-burst',
        sku: 'GTR-2026-10002',
        brand: brandMap['gibson'],
        category: catMap['electric-guitars'],
        price: 249999,
        salePrice: 229999,
        discountType: 'percentage',
        discountValue: 8,
        stock: 6,
        description: 'The Les Paul Standard 60s has a solid mahogany body with an AA figured maple top and a slim taper 60s-style mahogany neck. Equipped with Burstbucker 61R and 61T humbuckers with Alnico 5 magnets for rich sustain.',
        shortDescription: 'AA Maple Top, Mahogany Body, Burstbucker 61 Pickups',
        images: [
          'https://images.unsplash.com/photo-1550291652-6ea9114a47b1?w=800',
          'https://images.unsplash.com/photo-1564186763535-ebb21ef5277f?w=800'
        ],
        specs: {
          guitarType: 'Electric',
          bodyShape: 'Les Paul Singlecut',
          bodyMaterial: 'Mahogany',
          topMaterial: 'AA Figured Maple',
          neckMaterial: 'Mahogany',
          fingerboardMaterial: 'Indian Rosewood',
          scaleLength: '24.75"',
          numberOfStrings: 6,
          frets: 22,
          pickupConfiguration: 'HH',
          pickupType: 'Burstbucker 61R / 61T Humbuckers',
          bridgeType: 'ABR-1 Tune-O-Matic with Aluminum Stopbar',
          tuningMachines: 'Grover Rotomatics with Kidney Buttons',
          handOrientation: 'Right-Handed',
          color: 'Bourbon Burst',
          finish: 'Gloss Nitrocellulose Lacquer',
          includesCase: true
        },
        rating: 5.0,
        numReviews: 42,
        isFeatured: true,
        isBestSeller: true
      },
      {
        name: 'PRS Custom 24 SE Bonnie Pink',
        slug: 'prs-custom-24-se-bonnie-pink',
        sku: 'GTR-2026-10003',
        brand: brandMap['prs'],
        category: catMap['electric-guitars'],
        price: 84999,
        salePrice: 79999,
        stock: 12,
        description: 'The SE Custom 24 brings the original PRS design platform to high-grade instruments. Features a maple top with flame maple veneer, mahogany back, wide thin maple neck, 24 frets, 85/15 "S" humbuckers.',
        shortDescription: 'Flame Maple Veneer, 85/15 "S" Humbuckers, Bird Inlays',
        images: ['https://images.unsplash.com/photo-1516924962500-2b4b3b99ea02?w=800'],
        specs: {
          guitarType: 'Electric',
          bodyShape: 'Double Cutaway',
          bodyMaterial: 'Mahogany',
          topMaterial: 'Flame Maple Veneer',
          neckMaterial: 'Maple',
          fingerboardMaterial: 'Rosewood',
          scaleLength: '25"',
          numberOfStrings: 6,
          frets: 24,
          pickupConfiguration: 'HH',
          pickupType: 'PRS 85/15 "S" Humbuckers',
          bridgeType: 'PRS Patented Tremolo, Molded',
          tuningMachines: 'PRS Designed Tuners',
          handOrientation: 'Right-Handed',
          color: 'Bonnie Pink',
          finish: 'Gloss Polyurethane',
          includesCase: true
        },
        rating: 4.8,
        numReviews: 18,
        isFeatured: true
      },
      {
        name: 'Ibanez Genesis Collection RG550 Desert Sun Yellow',
        slug: 'ibanez-genesis-collection-rg550-desert-sun-yellow',
        sku: 'GTR-2026-10004',
        brand: brandMap['ibanez'],
        category: catMap['electric-guitars'],
        price: 94999,
        salePrice: 89999,
        stock: 8,
        description: 'Made in Japan, the RG550 features a Basswood body, 5-piece Maple/Walnut Wizard neck, Edge double-locking tremolo system, and V7/S1/V8 pickup combo for lightning-fast solos.',
        shortDescription: 'Made in Japan, Wizard 5-pc Neck, Edge Tremolo',
        images: ['https://images.unsplash.com/photo-1511671782779-c97d3d27a1d4?w=800'],
        specs: {
          guitarType: 'Electric',
          bodyShape: 'Superstrat / RG',
          bodyMaterial: 'Basswood',
          neckMaterial: '5-pc Maple/Walnut',
          fingerboardMaterial: 'Maple',
          scaleLength: '25.5"',
          numberOfStrings: 6,
          frets: 24,
          pickupConfiguration: 'HSH',
          pickupType: 'Ibanez V7 / S1 / V8 Passives',
          bridgeType: 'Edge Double-Locking Tremolo',
          tuningMachines: 'Gotoh Machine Heads',
          handOrientation: 'Right-Handed',
          color: 'Desert Sun Yellow',
          finish: 'Gloss',
          includesCase: false
        },
        rating: 4.9,
        numReviews: 15,
        isNewArrival: true
      },

      // ACOUSTIC GUITARS
      {
        name: 'Martin D-28 Standard Dreadnought Acoustic Guitar',
        slug: 'martin-d-28-standard-dreadnought-acoustic-guitar',
        sku: 'GTR-2026-10005',
        brand: brandMap['martin'],
        category: catMap['acoustic-guitars'],
        price: 289999,
        salePrice: 269999,
        stock: 5,
        description: 'The Martin D-28 is the dreadnought by which all acoustic guitars are judged. Crafted with Solid Sitka Spruce top, East Indian Rosewood back and sides, giving massive projection.',
        shortDescription: 'Solid Sitka Spruce Top, East Indian Rosewood Back & Sides',
        images: [
          'https://images.unsplash.com/photo-1525201548942-d8732f6617a0?w=800',
          'https://images.unsplash.com/photo-1510915361894-db8b60106cb1?w=800'
        ],
        specs: {
          guitarType: 'Acoustic',
          bodyShape: 'Dreadnought',
          bodyMaterial: 'East Indian Rosewood',
          topMaterial: 'Solid Sitka Spruce',
          neckMaterial: 'Select Hardwood',
          fingerboardMaterial: 'Ebony',
          scaleLength: '25.4"',
          numberOfStrings: 6,
          frets: 20,
          pickupConfiguration: 'None',
          bridgeType: 'Ebony Modern Belly',
          tuningMachines: 'Nickel Open Gear',
          handOrientation: 'Right-Handed',
          color: 'Natural Spruce',
          finish: 'Gloss Natural',
          includesCase: true
        },
        rating: 5.0,
        numReviews: 31,
        isFeatured: true,
        isBestSeller: true
      },
      {
        name: 'Taylor 214ce Grand Auditorium Acoustic-Electric',
        slug: 'taylor-214ce-grand-auditorium-acoustic-electric-guitar',
        sku: 'GTR-2026-10006',
        brand: brandMap['taylor'],
        category: catMap['acoustic-guitars'],
        price: 109999,
        salePrice: 99999,
        stock: 9,
        description: 'Combines a solid Torrefied Sitka Spruce top with layered Rosewood back and sides for rich acoustic balance. Includes Taylor ES2 electronics.',
        shortDescription: 'Torrefied Spruce Top, ES2 Electronics, Venetian Cutaway',
        images: ['https://images.unsplash.com/photo-1510915361894-db8b60106cb1?w=800'],
        specs: {
          guitarType: 'Acoustic',
          bodyShape: 'Grand Auditorium Cutaway',
          bodyMaterial: 'Layered Rosewood',
          topMaterial: 'Solid Sitka Spruce',
          neckMaterial: 'Neo-Tropical Mahogany',
          fingerboardMaterial: 'West African Ebony',
          scaleLength: '25.5"',
          numberOfStrings: 6,
          frets: 20,
          pickupConfiguration: 'Taylor Expression System 2 (ES2)',
          bridgeType: 'Ebony',
          tuningMachines: 'Taylor Chrome Tuners',
          handOrientation: 'Right-Handed',
          color: 'Natural',
          finish: 'Matte Finish',
          includesCase: true
        },
        rating: 4.8,
        numReviews: 19,
        isNewArrival: true
      },
      {
        name: 'Yamaha FG800 Solid Top Dreadnought Acoustic',
        slug: 'yamaha-fg800-solid-top-dreadnought-acoustic-guitar',
        sku: 'GTR-2026-10007',
        brand: brandMap['yamaha'],
        category: catMap['acoustic-guitars'],
        price: 19999,
        salePrice: 17999,
        stock: 25,
        description: 'Yamaha’s flagship entry-level acoustic with solid Sitka spruce top, nato back and sides, scalloped bracing for enhanced low-end.',
        shortDescription: 'Solid Sitka Spruce Top, Scalloped Bracing',
        images: ['https://images.unsplash.com/photo-1510915361894-db8b60106cb1?w=800'],
        specs: {
          guitarType: 'Acoustic',
          bodyShape: 'Dreadnought',
          bodyMaterial: 'Nato / Okoume',
          topMaterial: 'Solid Sitka Spruce',
          neckMaterial: 'Nato',
          fingerboardMaterial: 'Rosewood',
          scaleLength: '25"',
          numberOfStrings: 6,
          frets: 20,
          pickupConfiguration: 'None',
          bridgeType: 'Rosewood',
          tuningMachines: 'Die-Cast Chrome',
          handOrientation: 'Right-Handed',
          color: 'Natural',
          finish: 'Gloss',
          includesCase: false
        },
        rating: 4.9,
        numReviews: 67,
        isBestSeller: true
      },

      // BASS GUITARS
      {
        name: 'Fender Player II Precision Bass Olympic White',
        slug: 'fender-player-ii-precision-bass-olympic-white',
        sku: 'GTR-2026-10008',
        brand: brandMap['fender'],
        category: catMap['bass-guitars'],
        price: 79999,
        salePrice: 74999,
        stock: 7,
        description: 'Features a punchy Player Series Split Single-Coil pickup, Modern C maple neck, 9.5"-radius rosewood fingerboard for definitive Fender low-end.',
        shortDescription: 'Split Single-Coil Pickup, Modern C Neck, Long Scale',
        images: ['https://images.unsplash.com/photo-1564186763535-ebb21ef5277f?w=800'],
        specs: {
          guitarType: 'Bass',
          bodyShape: 'Precision Bass',
          bodyMaterial: 'Alder',
          topMaterial: 'None',
          neckMaterial: 'Maple',
          fingerboardMaterial: 'Rosewood',
          scaleLength: '34" Long Scale',
          numberOfStrings: 4,
          frets: 20,
          pickupConfiguration: 'Split Single-Coil',
          pickupType: 'Player Series Alnico 5 Split-Coil',
          bridgeType: '4-Saddle Standard',
          tuningMachines: 'Standard Open-Gear',
          handOrientation: 'Right-Handed',
          color: 'Olympic White',
          finish: 'Gloss Polyester',
          includesCase: false
        },
        rating: 4.9,
        numReviews: 11,
        isNewArrival: true
      },

      // AMPLIFIERS & PEDALS
      {
        name: 'Boss Katana-100 MkII 100-watt 1x12 Combo Amp',
        slug: 'boss-katana-100-mkii-combo-amplifier',
        sku: 'GTR-2026-10009',
        brand: brandMap['boss'],
        category: catMap['amplifiers'],
        price: 36999,
        salePrice: 33999,
        stock: 20,
        description: 'Five primary amp characters with five variation options, plus 60 customizable Boss effects accessible via BOSS Tone Studio software.',
        shortDescription: '100W Output, 12" Custom Speaker, 60 BOSS Effects',
        images: ['https://images.unsplash.com/photo-1598488035139-bdbb2231ce04?w=800'],
        specs: {
          guitarType: 'Accessories',
          bodyShape: 'Combo Amp',
          finish: 'Black Tolex',
          includesCase: false
        },
        rating: 4.9,
        numReviews: 54,
        isBestSeller: true
      }
    ];

    const insertedProducts = await Product.create(seedProducts);
    console.log(`[SEEDER]: Inserted ${insertedProducts.length} realistic INR products with SKUs & specs`);

    // 5. Insert Banners, Coupons, SocialMedia, EmailTemplates, WebsiteSettings
    await Banner.create(seedBanners);
    await Coupon.create(seedCoupons);
    await SocialMedia.create(seedSocialMedia);
    await EmailTemplate.create(seedEmailTemplates);
    await WebsiteSettings.create({});

    // 6. Demo Reviews
    await Review.create([
      {
        user: customerUser._id,
        product: insertedProducts[0]._id,
        rating: 5,
        title: 'Sensational playability!',
        comment: 'The Player II Stratocaster neck feels like butter. Clean tones ring out beautifully.'
      },
      {
        user: customerUser._id,
        product: insertedProducts[1]._id,
        rating: 5,
        title: 'Dream guitar achieved in India!',
        comment: 'The Les Paul Standard 60s in Bourbon Burst has unbeatable sustain. Fast delivery in Bengaluru!'
      }
    ]);

    console.log('====================================================');
    console.log('[SEED COMPLETE]: Database fully populated!');
    console.log('Admin Email: admin@guitars.com | Password: Admin@123');
    console.log('Customer Email: john@example.com | Password: Customer@123');
    console.log('====================================================');

    process.exit(0);
  } catch (error) {
    console.error('[SEED ERROR]:', error);
    process.exit(1);
  }
};

seedDB();