module.exports = (sequelize, DataTypes) => {
  const Feedback = sequelize.define('Feedback', {
    id: {
      type: DataTypes.UUID,
      defaultValue: DataTypes.UUIDV4,
      primaryKey: true
    },
    user_id: {
      type: DataTypes.UUID,
      allowNull: false,
      references: {
        model: 'users',
        key: 'id'
      }
    },
    message_id: {
      type: DataTypes.UUID,
      allowNull: true,
      references: {
        model: 'messages',
        key: 'id'
      }
    },
    feedback_type: {
      type: DataTypes.ENUM('positive', 'negative', 'correction', 'suggestion'),
      allowNull: false
    },
    rating: {
      type: DataTypes.INTEGER,
      allowNull: true,
      validate: {
        min: 1,
        max: 5
      }
    },
    comment: {
      type: DataTypes.TEXT,
      allowNull: true
    },
    corrected_content: {
      type: DataTypes.TEXT,
      allowNull: true
    },
    is_processed: {
      type: DataTypes.BOOLEAN,
      defaultValue: false
    },
    processing_notes: {
      type: DataTypes.TEXT,
      allowNull: true
    },
    metadata: {
      type: DataTypes.JSONB,
      defaultValue: {}
    }
  }, {
    tableName: 'feedback',
    indexes: [
      { fields: ['user_id'] },
      { fields: ['message_id'] },
      { fields: ['feedback_type'] },
      { fields: ['is_processed'] },
      { fields: ['created_at'] }
    ]
  });

  return Feedback;
};