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

const CourseInstructor = sequelize.define("CourseInstructor", {
  id:           { type: DataTypes.BIGINT,      primaryKey: true, autoIncrement: true },
  course_id:    { type: DataTypes.BIGINT,      allowNull: false },
  user_id:      { type: DataTypes.BIGINT,      allowNull: true  },
  display_name: { type: DataTypes.STRING(255), allowNull: false },
  order_index:  { type: DataTypes.INTEGER,     allowNull: false, defaultValue: 0 },
  created_by:   { type: DataTypes.BIGINT,      allowNull: true  },
}, {
  tableName:  "course_instructors",
  timestamps: true,
  createdAt:  "created_at",
  updatedAt:  "updated_at",
  indexes: [
    { fields: ["course_id"] },
  ],
});

module.exports = CourseInstructor;