'use strict';

module.exports = {
  async up(queryInterface, Sequelize) {
    await queryInterface.createTable('task_list_groups', {
      id:           { type: Sequelize.UUID, defaultValue: Sequelize.UUIDV4, primaryKey: true },
      task_list_id: { type: Sequelize.UUID, allowNull: false, references: { model: 'task_lists',  key: 'task_list_id' }, onDelete: 'CASCADE' },
      group_id:     { type: Sequelize.BIGINT, allowNull: false, references: { model: 'user_groups', key: 'group_id'    }, onDelete: 'CASCADE' },
      assignedAt:   { type: Sequelize.DATE, defaultValue: Sequelize.NOW, allowNull: false },
      assignedBy:   { type: Sequelize.BIGINT, allowNull: true },
    });

    await queryInterface.addIndex('task_list_groups', { fields: ['task_list_id', 'group_id'], unique: true, name: 'uq_task_list_group' });
    await queryInterface.addIndex('task_list_groups', { fields: ['task_list_id'], name: 'idx_tlg_task_list_id' });
    await queryInterface.addIndex('task_list_groups', { fields: ['group_id'],     name: 'idx_tlg_group_id'     });
  },

  async down(queryInterface) {
    await queryInterface.dropTable('task_list_groups');
  },
};