<?php

namespace App\Models;

use App\Models\BaseModel;

class Participation extends BaseModel
{
    protected $table = 'participation';

    /**
     * legacy: useTimestamps = false (even though created_at/updated_at columns exist).
     * Keep OFF to match behavior (you can still set created_at/updated_at manually).
     */
    public $timestamps = false;

    protected $fillable = [
        'student_id',
        'school_id',
        'class_section_id',
        'updated_by',
        'score',
        'max_points',
        'status',
        'excused_reason',
        'locked_at',
        'locked_by',
        'comment',
        'semester',
        'school_year',
        'created_at',
        'updated_at',
    ];

    protected $casts = [
        'student_id'       => 'integer',
        'school_id'        => 'integer',
        'class_section_id' => 'integer',
        'updated_by'       => 'integer',

        // score is numeric; change to 'integer' if it is whole number
        'score'            => 'decimal:2',
        'max_points'       => 'decimal:2',
        'locked_by'        => 'integer',
        'locked_at'        => 'datetime',

        'created_at'       => 'datetime',
        'updated_at'       => 'datetime',
    ];

    /* Optional relationships */
    public function student()
    {
        return $this->belongsTo(Student::class, 'student_id');
    }

    public function classSection()
    {
        return $this->belongsTo(ClassSection::class, 'class_section_id');
    }

    /**
     * Equivalent of legacy getParticipationScore()
     * Returns null if missing/blank/non-numeric.
     */
    public static function getParticipationScore(
        int $studentId,
        string $semester,
        string $schoolYear,
        ?int $classSectionId = null
    ): ?float {
        $q = static::query()
            ->select('score')
            ->where('student_id', $studentId)
            ->where('semester', $semester)
            ->where('school_year', $schoolYear);

        if ($classSectionId !== null) {
            $q->where('class_section_id', $classSectionId);
        }

        $row = $q->first();
        if (!$row) return null;

        $score = $row->score;

        if ($score === null) return null;
        if (is_string($score) && trim($score) === '') return null;
        if ($score === '') return null;
        if (!is_numeric($score)) return null;

        return (float) $score;
    }
}