'use strict';

/** @type {import('sequelize-cli').Migration} */
module.exports = {
  async up(queryInterface, Sequelize) {
    await queryInterface.createTable('achievements', {
      id: {
        type: Sequelize.CHAR(36),
        primaryKey: true,
        allowNull: false,
        comment: 'UUID primary key'
      },
      name: {
        type: Sequelize.STRING(100),
        allowNull: false,
        unique: true,
        comment: 'Unique name of the achievement'
      },
      slug: {
        type: Sequelize.STRING(100),
        allowNull: false,
        unique: true,
        comment: 'URL-friendly slug'
      },
      description: {
        type: Sequelize.TEXT,
        allowNull: false,
        comment: 'Description of the achievement'
      },
      icon: {
        type: Sequelize.STRING(50),
        allowNull: true,
        comment: 'Icon identifier (e.g., emoji or icon class)'
      },
      badge_color: {
        type: Sequelize.STRING(20),
        allowNull: true,
        defaultValue: '#FFD700',
        comment: 'Hex color code for the badge'
      },
      category: {
        type: Sequelize.ENUM('quiz', 'streak', 'score', 'speed', 'milestone', 'special'),
        allowNull: false,
        defaultValue: 'milestone',
        comment: 'Category of achievement'
      },
      requirement_type: {
        type: Sequelize.ENUM('quizzes_completed', 'quizzes_passed', 'perfect_score', 'streak_days', 'total_questions', 'category_master', 'speed_demon', 'early_bird'),
        allowNull: false,
        comment: 'Type of requirement to earn the achievement'
      },
      requirement_value: {
        type: Sequelize.INTEGER.UNSIGNED,
        allowNull: false,
        comment: 'Value needed to satisfy requirement (e.g., 10 for "10 quizzes")'
      },
      points: {
        type: Sequelize.INTEGER.UNSIGNED,
        allowNull: false,
        defaultValue: 10,
        comment: 'Points awarded when achievement is earned'
      },
      is_active: {
        type: Sequelize.BOOLEAN,
        allowNull: false,
        defaultValue: true,
        comment: 'Whether this achievement is currently available'
      },
      display_order: {
        type: Sequelize.INTEGER.UNSIGNED,
        allowNull: false,
        defaultValue: 0,
        comment: 'Display order in achievement list'
      },
      created_at: {
        type: Sequelize.DATE,
        allowNull: false,
        defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'),
        comment: 'Record creation timestamp'
      },
      updated_at: {
        type: Sequelize.DATE,
        allowNull: false,
        defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'),
        comment: 'Record last update timestamp'
      }
    }, {
      charset: 'utf8mb4',
      collate: 'utf8mb4_unicode_ci',
      comment: 'Defines available achievements users can earn'
    });

    // Add indexes
    await queryInterface.addIndex('achievements', ['slug'], {
      name: 'idx_achievements_slug',
      unique: true
    });

    await queryInterface.addIndex('achievements', ['category'], {
      name: 'idx_achievements_category'
    });

    await queryInterface.addIndex('achievements', ['requirement_type'], {
      name: 'idx_achievements_requirement_type'
    });

    await queryInterface.addIndex('achievements', ['is_active'], {
      name: 'idx_achievements_is_active'
    });

    await queryInterface.addIndex('achievements', ['display_order'], {
      name: 'idx_achievements_display_order'
    });

    console.log('✅ Achievements table created with 13 fields and 5 indexes');
  },

  async down(queryInterface, Sequelize) {
    await queryInterface.dropTable('achievements');
    console.log('✅ Achievements table dropped');
  }
};