'use strict';
const { v4: uuidv4 } = require('uuid');

/** @type {import('sequelize-cli').Migration} */
module.exports = {
  async up(queryInterface, Sequelize) {
    const categories = [
      {
        id: uuidv4(),
        name: 'JavaScript',
        slug: 'javascript',
        description: 'Core JavaScript concepts, ES6+, async programming, and modern features',
        icon: '🟨',
        color: '#F7DF1E',
        is_active: true,
        guest_accessible: true,
        question_count: 0,
        quiz_count: 0,
        display_order: 1,
        created_at: new Date(),
        updated_at: new Date()
      },
      {
        id: uuidv4(),
        name: 'Angular',
        slug: 'angular',
        description: 'Angular framework, components, services, RxJS, and state management',
        icon: '🅰️',
        color: '#DD0031',
        is_active: true,
        guest_accessible: true,
        question_count: 0,
        quiz_count: 0,
        display_order: 2,
        created_at: new Date(),
        updated_at: new Date()
      },
      {
        id: uuidv4(),
        name: 'React',
        slug: 'react',
        description: 'React library, hooks, component lifecycle, state management, and best practices',
        icon: '⚛️',
        color: '#61DAFB',
        is_active: true,
        guest_accessible: true,
        question_count: 0,
        quiz_count: 0,
        display_order: 3,
        created_at: new Date(),
        updated_at: new Date()
      },
      {
        id: uuidv4(),
        name: 'Node.js',
        slug: 'nodejs',
        description: 'Node.js runtime, Express, APIs, middleware, and server-side JavaScript',
        icon: '🟢',
        color: '#339933',
        is_active: true,
        guest_accessible: false,
        question_count: 0,
        quiz_count: 0,
        display_order: 4,
        created_at: new Date(),
        updated_at: new Date()
      },
      {
        id: uuidv4(),
        name: 'TypeScript',
        slug: 'typescript',
        description: 'TypeScript types, interfaces, generics, decorators, and type safety',
        icon: '📘',
        color: '#3178C6',
        is_active: true,
        guest_accessible: false,
        question_count: 0,
        quiz_count: 0,
        display_order: 5,
        created_at: new Date(),
        updated_at: new Date()
      },
      {
        id: uuidv4(),
        name: 'SQL & Databases',
        slug: 'sql-databases',
        description: 'SQL queries, database design, indexing, transactions, and optimization',
        icon: '🗄️',
        color: '#4479A1',
        is_active: true,
        guest_accessible: false,
        question_count: 0,
        quiz_count: 0,
        display_order: 6,
        created_at: new Date(),
        updated_at: new Date()
      },
      {
        id: uuidv4(),
        name: 'System Design',
        slug: 'system-design',
        description: 'Scalability, architecture patterns, microservices, and design principles',
        icon: '🏗️',
        color: '#FF6B6B',
        is_active: true,
        guest_accessible: false,
        question_count: 0,
        quiz_count: 0,
        display_order: 7,
        created_at: new Date(),
        updated_at: new Date()
      }
    ];

    await queryInterface.bulkInsert('categories', categories, {});
    console.log('✅ Seeded 7 demo categories');
  },

  async down(queryInterface, Sequelize) {
    await queryInterface.bulkDelete('categories', null, {});
    console.log('✅ Removed demo categories');
  }
};