const mongoose = require('mongoose');

const checkInEntrySchema = new mongoose.Schema(
  {
    checkedInAt: { type: Date, required: true, default: Date.now },
    source: { type: String, enum: ['dashboard', 'public'], required: true },
    checkedInBy: { type: mongoose.Schema.Types.ObjectId, ref: 'User' },
  },
  { _id: false }
);

const attendanceParticipantSchema = new mongoose.Schema(
  {
    attendance: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Attendance',
      required: true,
      index: true,
    },
    event: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Event',
      required: true,
      index: true,
    },
    participant: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Participant',
      required: true,
      index: true,
    },
    firstName: { type: String, trim: true },
    lastName: { type: String, trim: true },
    email: { type: String, trim: true, lowercase: true },
    phone: { type: String, trim: true },
    checkIns: { type: [checkInEntrySchema], default: [] },
  },
  { timestamps: true }
);

attendanceParticipantSchema.index({ attendance: 1, participant: 1 }, { unique: true });
attendanceParticipantSchema.index({ attendance: 1, updatedAt: -1 });

module.exports = mongoose.model(
  'AttendanceParticipant',
  attendanceParticipantSchema,
  'attendance_participants'
);