// /components/sessions/sessionModel.js

const mongoose = require('mongoose');

const attendanceRecordSchema = new mongoose.Schema({
  user: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true
  },
  status: {
    type: String,
    enum: ['present', 'absent', 'late', 'excused'],
    default: 'present'
  },
  note: {
    type: String,
    trim: true
  },
  recordedBy: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User'
  }
}, {
  _id: false
});

const sessionSchema = new mongoose.Schema({
  course: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Course',
    required: true,
    index: true
  },
  class: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Class',
    required: true,
    index: true
  },
  professor: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Professor',
    index: true
  },
  day: {
    type: Date,
    required: true,
    index: true
  },
  startTime: {
    type: String,
    required: true,
    trim: true
  },
  endTime: {
    type: String,
    required: true,
    trim: true
  },
  place: {
    type: String,
    trim: true
  },
  topic: {
    type: String,
    trim: true
  },
  note: {
    type: String,
    trim: true,
    maxlength: 5000
  },
  status: {
    type: String,
    enum: ['scheduled', 'held', 'cancelled'],
    default: 'scheduled'
  },
  attendanceList: [attendanceRecordSchema],
  reminderSentAt: {
    type: Date,
    default: null
  },
  adminNotes: {
    type: [String],
    default: []
  },
  isDeleted: {
    type: Boolean,
    default: false,
    index: true
  },
  deletedAt: {
    type: Date,
    default: null
  }
}, {
  timestamps: true
});

module.exports = mongoose.model('Session', sessionSchema);