const { DataTypes } = require('sequelize');

module.exports = {
  up: async (queryInterface, Sequelize) => {
    await queryInterface.createTable('conversations', {
      id: {
        type: DataTypes.UUID,
        defaultValue: DataTypes.UUIDV4,
        primaryKey: true,
        allowNull: false
      },
      user_id: {
        type: DataTypes.UUID,
        allowNull: false,
        references: {
          model: 'users',
          key: 'id'
        },
        onUpdate: 'CASCADE',
        onDelete: 'CASCADE'
      },
      title: {
        type: DataTypes.STRING,
        allowNull: false
      },
      status: {
        type: DataTypes.ENUM('active', 'completed', 'archived'),
        defaultValue: 'active',
        allowNull: false
      },
      context: {
        type: DataTypes.JSONB,
        defaultValue: {},
        allowNull: false
      },
      metadata: {
        type: DataTypes.JSONB,
        defaultValue: {},
        allowNull: false
      },
      created_at: {
        type: DataTypes.DATE,
        allowNull: false,
        defaultValue: DataTypes.NOW
      },
      updated_at: {
        type: DataTypes.DATE,
        allowNull: false,
        defaultValue: DataTypes.NOW
      }
    });

    // Create indexes
    await queryInterface.addIndex('conversations', ['user_id']);
    await queryInterface.addIndex('conversations', ['status']);
    await queryInterface.addIndex('conversations', ['created_at']);
  },

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