<?php

namespace App\Models;

use App\Enums\StockChangeType;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class StockLog extends Model
{
    use HasFactory;

    protected $fillable = [
        'stock_id',
        'source_type',
        'source_id',
        'previous_quantity',
        'new_quantity',
        'quantity_change',
        'change_type',
        'description',
        'user_id'
    ];

    protected $casts = [
        'change_type' => StockChangeType::class,
        'previous_quantity' => 'decimal:2',
        'new_quantity' => 'decimal:2',
        'quantity_change' => 'decimal:2'
    ];

    protected static function booted()
    {
        static::creating(function ($stockLog) {
            // Hitung quantity_change
            $stockLog->quantity_change = $stockLog->new_quantity - $stockLog->previous_quantity;
            
            // Tentukan change_type berdasarkan quantity_change
            if ($stockLog->quantity_change == 0) {
                // Jika quantity sama persis (tanpa toleransi)
                $stockLog->change_type = StockChangeType::NO_CHANGE;
            } else if ($stockLog->quantity_change > 0) {
                $stockLog->change_type = StockChangeType::INCREASE;
            } else {
                $stockLog->change_type = StockChangeType::DECREASE;
            }
        });
    }

    public function stock()
    {
        return $this->belongsTo(Stock::class);
    }

    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function source()
    {
        return $this->morphTo();
    }

    // Helper method untuk mendapatkan label change_type
    public function getChangeTypeLabelAttribute()
    {
        return $this->change_type->label();
    }
}