<?php

namespace App\Models;

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

class TeacherSubject extends Model
{
    protected $fillable = ['teacher_id', 'subject_id', 'class_id', 'academic_year'];

    /**
     * Get the teacher associated with this assignment
     */
    public function teacher(): BelongsTo
    {
        return $this->belongsTo(User::class, 'teacher_id');
    }

    /**
     * Get the subject associated with this assignment
     */
    public function subject(): BelongsTo
    {
        return $this->belongsTo(Subject::class, 'subject_id');
    }

    /**
     * Get the class associated with this assignment
     */
    public function class(): BelongsTo
    {
        return $this->belongsTo(ClassRoom::class, 'class_id');
    }

    /**
     * Scope for current academic year
     */
    public function scopeCurrentYear($query)
    {
        return $query->where('academic_year', now()->format('Y'));
    }

    /**
     * Scope for specific academic year
     */
    public function scopeForYear($query, $year)
    {
        return $query->where('academic_year', $year);
    }

    public function attendances()
    {
        return $this->hasMany(Attendances::class);
    }
}