<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class TeachingArrangement extends Model
{
    protected $fillable = [
        'teacher_id',
        'subject_id',
        'weekday',
        'start_time',
        'duration_minutes',
        'is_group',
        'max_students',
        'location_id',
        'fee_policy',
        'active',
    ];

    /**
     * The teacher running this arrangement.
     */
    public function teacher(): BelongsTo
    {
        return $this->belongsTo(TeacherProfile::class, 'teacher_id');
    }

    /**
     * The subject being taught.
     */
    public function subject(): BelongsTo
    {
        return $this->belongsTo(Subject::class, 'subject_id');
    }

    /**
     * Where the session takes place (room, online, etc.)
     */
    public function location(): BelongsTo
    {
        return $this->belongsTo(Location::class, 'location_id');
    }

    /**
     * Students assigned to this arrangement.
     */
    public function students(): HasMany
    {
        return $this->hasMany(TeachingArrangementStudent::class, 'teaching_arrangement_id');
    }

    /**
     * Attendance records generated from this arrangement.
     */
    public function attendance(): HasMany
    {
        return $this->hasMany(LessonAttendance::class, 'teaching_arrangement_id');
    }
}
