const { DataTypes } = require('sequelize');
const { sequelize } = require('../config/database');

const ResponseSession = sequelize.define('ResponseSession', {
  id: {
    type: DataTypes.UUID,
    defaultValue: DataTypes.UUIDV4,
    primaryKey: true,
  },
  openaiResponseId: {
    type: DataTypes.STRING,
    allowNull: false,
    unique: true,
    comment: 'OpenAI response ID from Responses API'
  },
  conversationId: {
    type: DataTypes.UUID,
    allowNull: false,
    references: {
      model: 'conversations',
      key: 'id',
    },
    onUpdate: 'CASCADE',
    onDelete: 'CASCADE',
  },
  assistantId: {
    type: DataTypes.UUID,
    allowNull: false,
    references: {
      model: 'assistants',
      key: 'id',
    },
    onUpdate: 'CASCADE',
    onDelete: 'CASCADE',
  },
  userId: {
    type: DataTypes.UUID,
    allowNull: false,
    references: {
      model: 'users',
      key: 'id',
    },
    onUpdate: 'CASCADE',
    onDelete: 'CASCADE',
  },
  status: {
    type: DataTypes.ENUM('in_progress', 'completed', 'failed', 'cancelled'),
    defaultValue: 'in_progress',
    allowNull: false,
  },
  backgroundProcessing: {
    type: DataTypes.BOOLEAN,
    defaultValue: false,
    allowNull: false,
  },
  toolsUsed: {
    type: DataTypes.JSONB,
    defaultValue: [],
    comment: 'Array of tools used in this response session'
  },
  metadata: {
    type: DataTypes.JSONB,
    defaultValue: {},
  },
}, {
  tableName: 'response_sessions',
  timestamps: true,
  indexes: [
    { fields: ['openaiResponseId'], unique: true },
    { fields: ['conversationId'] },
    { fields: ['assistantId'] },
    { fields: ['userId'] },
    { fields: ['status'] },
    { fields: ['createdAt'] },
  ],
});

module.exports = ResponseSession;