'use strict';

module.exports = {
  async up(queryInterface, Sequelize) {
    await queryInterface.createTable('task_completions', {
      completion_id: { type: Sequelize.UUID, defaultValue: Sequelize.UUIDV4, primaryKey: true },
      task_id:       { type: Sequelize.UUID, allowNull: false, references: { model: 'tasks', key: 'task_id' }, onDelete: 'CASCADE' },
      user_id:       { type: Sequelize.BIGINT, allowNull: false, references: { model: 'users', key: 'user_id' }, onDelete: 'CASCADE' },
      note:          { type: Sequelize.TEXT, allowNull: true },
      response_text: { type: Sequelize.TEXT, allowNull: true },
      status:        { type: Sequelize.STRING, allowNull: false, defaultValue: 'submitted' },
      reviewed_by:   { type: Sequelize.BIGINT, allowNull: true },
      reviewed_at:   { type: Sequelize.DATE, allowNull: true },
      review_note:   { type: Sequelize.TEXT, allowNull: true },
      submitted_at:  { type: Sequelize.DATE, defaultValue: Sequelize.NOW, allowNull: false },
      createdBy:     { type: Sequelize.BIGINT, allowNull: true },
      updatedBy:     { type: Sequelize.BIGINT, allowNull: true },
      deletedBy:     { type: Sequelize.BIGINT, allowNull: true },
      createdAt:     { type: Sequelize.DATE, allowNull: false },
      updatedAt:     { type: Sequelize.DATE, allowNull: false },
      deletedAt:     { type: Sequelize.DATE, allowNull: true },
    });

    await queryInterface.sequelize.query(
      `ALTER TABLE task_completions ADD CONSTRAINT check_status
       CHECK (status IN ('submitted', 'approved', 'rejected'))`
    );

    await queryInterface.addIndex('task_completions', { fields: ['task_id'],          name: 'idx_tc_task_id'   });
    await queryInterface.addIndex('task_completions', { fields: ['user_id'],          name: 'idx_tc_user_id'   });
    await queryInterface.addIndex('task_completions', { fields: ['task_id', 'user_id'], name: 'idx_tc_task_user' });
  },

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