'use strict';

module.exports = {
  up: async (queryInterface, Sequelize) => {
    await queryInterface.createTable('calendar_tokens', {
      id: {
        type: Sequelize.INTEGER,
        primaryKey: true,
        autoIncrement: true,
        allowNull: false
      },
      user_id: {
        type: Sequelize.INTEGER,
        allowNull: false,
        references: {
          model: 'users',
          key: 'id'
        },
        onDelete: 'CASCADE'
      },
      provider: {
        type: Sequelize.STRING,
        allowNull: false,
        defaultValue: 'google'
      },
      access_token: {
        type: Sequelize.TEXT,
        allowNull: false
      },
      refresh_token: {
        type: Sequelize.TEXT,
        allowNull: true
      },
      token_type: {
        type: Sequelize.STRING,
        defaultValue: 'Bearer'
      },
      expires_at: {
        type: Sequelize.DATE,
        allowNull: true
      },
      scope: {
        type: Sequelize.TEXT,
        allowNull: true
      },
      connected_email: {
        type: Sequelize.STRING,
        allowNull: true
      },
      created_at: {
        type: Sequelize.DATE,
        allowNull: false,
        defaultValue: Sequelize.literal('CURRENT_TIMESTAMP')
      },
      updated_at: {
        type: Sequelize.DATE,
        allowNull: false,
        defaultValue: Sequelize.literal('CURRENT_TIMESTAMP')
      }
    });

    // Add unique index for user_id + provider combination
    await queryInterface.addIndex('calendar_tokens', {
      fields: ['user_id', 'provider'],
      unique: true,
      name: 'calendar_tokens_user_provider_unique'
    });

    // Add index for faster lookups by user_id
    await queryInterface.addIndex('calendar_tokens', {
      fields: ['user_id'],
      name: 'calendar_tokens_user_id_index'
    });
  },

  down: async (queryInterface, Sequelize) => {
    await queryInterface.dropTable('calendar_tokens');
  }
};