const mongoose = require('mongoose');
const fs = require('fs');
const path = require('path');
const dotenv = require('dotenv');
const HeaderMenu = require('../models/headerMenu');

dotenv.config();

const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/SIMS';

async function connectDB() {
    try {
        await mongoose.connect(MONGODB_URI);
        console.log('✅ MongoDB Connected for Migration');
    } catch (err) {
        console.error('❌ MongoDB Connection Error:', err);
        process.exit(1);
    }
}

const processMenuItems = async (items, parentId = null) => {
    for (const item of items) {
        console.log(`  > Importing: ${item.label}`);
        
        const menuDoc = {
            title: item.label,
            slug: item.slug,
            url: item.href,
            parentId: parentId,
            order: item.order || 0,
            status: item.isActive === false ? "inactive" : "active",
            type: item.type === "external" ? "external" : "internal"
        };

        const createdItem = await HeaderMenu.create(menuDoc);

        if (item.children && item.children.length > 0) {
            await processMenuItems(item.children, createdItem._id);
        }
    }
};

async function migrate() {
    await connectDB();

    try {
        console.log('--- Starting Header Menu Migration ---');
        
        // 1. Clear existing menu items
        await HeaderMenu.deleteMany({});
        console.log('🗑️  Cleared existing HeaderMenu collection');

        // 2. Read JSON data
        const dataPath = path.join(__dirname, '../data/header-menu.json');
        const fileData = fs.readFileSync(dataPath, 'utf8');
        const menuItems = JSON.parse(fileData);

        // 3. Recursive import
        await processMenuItems(menuItems);

        console.log('--- Migration Completed Successfully ---');
        process.exit(0);
    } catch (error) {
        console.error('❌ Migration Failed:', error);
        process.exit(1);
    }
}

migrate();