const { DataTypes } = require("sequelize");
const sequelize = require("../../config/db.config");

const CourseAssessment = sequelize.define("CourseAssessment", {
  assessment_id: { type: DataTypes.BIGINT, primaryKey: true, autoIncrement: true },
  uuid:          { type: DataTypes.UUID, defaultValue: DataTypes.UUIDV4, unique: true },
  course_id:     { type: DataTypes.BIGINT, allowNull: false, unique: true }, // one per course
  title:         { type: DataTypes.STRING(255), allowNull: true },
  is_required:   { type: DataTypes.BOOLEAN, defaultValue: false },
  passing_score: { type: DataTypes.INTEGER, defaultValue: 70 },
  time_limit_minutes: { type: DataTypes.INTEGER, allowNull: true }, // null = no limit
  max_questions:  { type: DataTypes.INTEGER, allowNull: true },     // null = show all
  max_attempts:      { type: DataTypes.INTEGER, defaultValue: 3 },   // failed attempts before cooldown
  cooldown_hours:    { type: DataTypes.INTEGER, defaultValue: 24 },  // hours locked after hitting max_attempts
  shuffle_questions: { type: DataTypes.BOOLEAN, defaultValue: false },
  createdBy:     { type: DataTypes.BIGINT, allowNull: true },
  updatedBy:     { type: DataTypes.BIGINT, allowNull: true },
  deletedBy:     { type: DataTypes.BIGINT, allowNull: true },
}, {
  tableName: "course_assessments",
  timestamps: true,
  paranoid: true,
});

module.exports = CourseAssessment