const { DataTypes } = require('sequelize');
const { v4: uuidv4 } = require('uuid');

module.exports = (sequelize) => {
  const QuizSessionQuestion = sequelize.define('QuizSessionQuestion', {
    id: {
      type: DataTypes.CHAR(36),
      primaryKey: true,
      allowNull: false
    },
    quizSessionId: {
      type: DataTypes.CHAR(36),
      allowNull: false,
      field: 'quiz_session_id'
    },
    questionId: {
      type: DataTypes.CHAR(36),
      allowNull: false,
      field: 'question_id'
    },
    questionOrder: {
      type: DataTypes.INTEGER.UNSIGNED,
      allowNull: false,
      field: 'question_order',
      validate: {
        min: 1
      }
    }
  }, {
    tableName: 'quiz_session_questions',
    underscored: true,
    timestamps: true,
    createdAt: 'created_at',
    updatedAt: 'updated_at',
    hooks: {
      beforeValidate: (quizSessionQuestion) => {
        if (!quizSessionQuestion.id) {
          quizSessionQuestion.id = uuidv4();
        }
      }
    }
  });

  // Define associations
  QuizSessionQuestion.associate = (models) => {
    QuizSessionQuestion.belongsTo(models.QuizSession, {
      foreignKey: 'quizSessionId',
      as: 'quizSession'
    });

    QuizSessionQuestion.belongsTo(models.Question, {
      foreignKey: 'questionId',
      as: 'question'
    });
  };

  return QuizSessionQuestion;
};