require('dotenv').config();
const fs = require('fs').promises;
const path = require('path');
const mongoose = require('mongoose');
const Home = require('../models/home'); // Đảm bảo đường dẫn đúng tới file model

// 1. Đọc file JSON
async function loadHomeData() {
  // Đảm bảo đường dẫn đúng tới file json
  const filePath = path.join(__dirname, '..', 'data', 'home.json');
  const raw = await fs.readFile(filePath, 'utf8');
  return JSON.parse(raw);
}

// 2. Hàm Transform: Đổ dữ liệu từ JSON (source) vào đúng Schema
function transformHome(source) {
  return {
    // --- Hero Section ---
    hero: {
      title: source.hero?.title || "",
      description: source.hero?.description || "",
      backgroundImage: source.hero?.backgroundImage || "",
      button: {
        label: source.hero?.button?.label || "Book Now",
        href: source.hero?.button?.href || "/booking"
      },
      contactBox: {
        welcomeText: source.hero?.contactBox?.welcomeText || "",
        phone: {
          label: source.hero?.contactBox?.phone?.label || "Call us",
          number: source.hero?.contactBox?.phone?.number || "",
          href: source.hero?.contactBox?.phone?.href || ""
        },
        email: {
          label: source.hero?.contactBox?.email?.label || "Email",
          address: source.hero?.contactBox?.email?.address || "",
          href: source.hero?.contactBox?.email?.href || ""
        },
        workingHours: {
          label: source.hero?.contactBox?.workingHours?.label || "Working Hours",
          hours: source.hero?.contactBox?.workingHours?.hours || ""
        }
      }
    },

    // --- About Section ---
    about: {
      title: source.about?.title || "",
      subtitle: source.about?.subtitle || "",
      description: source.about?.description || "",
      images: {
        mainImage1: source.about?.images?.mainImage1 || "",
        mainImage2: source.about?.images?.mainImage2 || "",
        avatars: Array.isArray(source.about?.images?.avatars) ? source.about.images.avatars : []
      },
      features: Array.isArray(source.about?.features) ? source.about.features : [],
      quote: source.about?.quote || "",
      button: {
        label: source.about?.button?.label || "",
        href: source.about?.button?.href || ""
      },
      stats: {
        customerCount: source.about?.stats?.customerCount || 0,
        customerLabel: source.about?.stats?.customerLabel || ""
      }
    },

    // --- Mission & Vision ---
    missionVision: {
      title: source.missionVision?.title || "",
      subtitle: source.missionVision?.subtitle || "",
      backgroundImage: source.missionVision?.backgroundImage || "",
      cards: Array.isArray(source.missionVision?.cards) ? source.missionVision.cards : []
    },

    // --- Why Choose Us ---
    whyChooseUs: {
      title: source.whyChooseUs?.title || "",
      subtitle: source.whyChooseUs?.subtitle || "",
      description: source.whyChooseUs?.description || "",
      button: source.whyChooseUs?.button || {},
      features: Array.isArray(source.whyChooseUs?.features) ? source.whyChooseUs.features : [],
      tags: Array.isArray(source.whyChooseUs?.tags) ? source.whyChooseUs.tags : [],
      cta: source.whyChooseUs?.cta || {}
    },

    // --- Activities ---
    activities: {
      cards: Array.isArray(source.activities?.cards) ? source.activities.cards : []
    },

    // --- FAQ ---
    faq: {
      title: source.faq?.title || "",
      subtitle: source.faq?.subtitle || "",
      description: source.faq?.description || "",
      image: source.faq?.image || "",
      contact: source.faq?.contact || {},
      questions: Array.isArray(source.faq?.questions) ? source.faq.questions : []
    },

    // --- Partners ---
    partners: {
      title: source.partners?.title || "",
      subtitle: source.partners?.subtitle || "",
      backgroundImage: source.partners?.backgroundImage || "",
      logos: Array.isArray(source.partners?.logos) ? source.partners.logos : [],
      cta: source.partners?.cta || {}
    },

    // --- Programs ---
    programs: {
      title: source.programs?.title || "",
      subtitle: source.programs?.subtitle || "",
      button: source.programs?.button || {},
      card: {
        pricePrefix: source.programs?.card?.pricePrefix || "from",
        priceSuffix: source.programs?.card?.priceSuffix || "USD",
        buttonLabel: source.programs?.card?.buttonLabel || "Camp Detail",
        buttonHref: source.programs?.card?.buttonHref || "/camp-profiles"
      },
      items: Array.isArray(source.programs?.items) ? source.programs.items : []
    },



    // --- Newsletter ---
    newsletter: {
      title: source.newsletter?.title || "",
      subtitle: source.newsletter?.subtitle || "",
      description: source.newsletter?.description || "",
      image: source.newsletter?.image || "",
      decorativeImage: source.newsletter?.decorativeImage || "",
      button: {
        label: source.newsletter?.button?.label || "",
        placeholder: source.newsletter?.button?.placeholder || "",
        href: source.newsletter?.button?.href || ""
      }
    },

    // --- Latest Posts ---
    latestPosts: {
      title: source.latestPosts?.title || "",
      subtitle: source.latestPosts?.subtitle || "",
      searchPlaceholder: source.latestPosts?.searchPlaceholder || "",
      sidebarTitle: source.latestPosts?.sidebarTitle || "",
      blogPosts: Array.isArray(source.latestPosts?.blogPosts) ? source.latestPosts.blogPosts : [],
      sidebarPosts: Array.isArray(source.latestPosts?.sidebarPosts) ? source.latestPosts.sidebarPosts : [],
      featuredCard: source.latestPosts?.featuredCard || {}
    },

    updatedAt: new Date()
  };
}

// 3. Chạy Migration
async function migrate() {
  try {
    // Kết nối DB
    await mongoose.connect(process.env.MONGODB_URI);
    console.log('✅ Connected to MongoDB');

    // A. Lấy dữ liệu thô
    const rawData = await loadHomeData();
    console.log('📖 Data loaded from JSON');

    // B. Chuẩn hóa dữ liệu theo Schema
    const homeData = transformHome(rawData);

    // C. Lưu vào DB (Upsert: Có rồi thì update, chưa có thì tạo)
    const existingDoc = await Home.findOne().sort({ updatedAt: -1 });

    if (existingDoc) {
      console.log('📝 Updating existing Home document...');
      await Home.findByIdAndUpdate(existingDoc._id, { $set: homeData }, { new: true });
    } else {
      console.log('📝 Creating NEW Home document...');
      await Home.create(homeData);
    }

    console.log('✨ Migration completed successfully!');

  } catch (error) {
    console.error('❌ Migration failed:', error);
    process.exit(1);
  } finally {
    await mongoose.connection.close();
    process.exit(0);
  }
}

migrate();