<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Carbon\Carbon;

class CalibrationLog extends Model
{
    use HasFactory;

    protected $table = 'calibration_logs';

    protected $fillable = [
        'certification_document',
        'user_guide',
        'instrument',
        'discipline',
        'description',
        'item_no',
        'equipment_name',
        'manufacturer',
        'model_no',
        'serial_no',
        'quantity',
        'passport_certificate_no',
        'place_of_calibration_verification',
        'calibrated_by',
        'calibration_frequency',
        'calibration_certificate',
        'calibration_certificate_no',
        'calibration_date',
        'calibration_due_date',
        'deviation_ratio',
        'status',
        'remarks',
        'comments',
        'download',
        'source_id',
        'source_module',
    ];

    /**
     * Calculate calibration_due_date when calibration_date or calibration_frequency changes
     */
    protected function calculateDueDate()
    {
        if ($this->calibration_date && $this->calibration_frequency) {
            try {
                $calibrationDate = Carbon::parse($this->calibration_date);
                $frequency = (int) $this->calibration_frequency;
                
                if ($frequency > 0) {
                    $this->calibration_due_date = $calibrationDate->copy()->addDays($frequency)->format('Y-m-d');
                }
            } catch (\Exception $e) {
                // If date parsing fails, don't set due_date
                // Log error if needed: \Log::error('Calibration date calculation failed: ' . $e->getMessage());
            }
        }
    }

    /**
     * Mutator: Calculate due_date when calibration_date is set
     */
    public function setCalibrationDateAttribute($value)
    {
        $this->attributes['calibration_date'] = $value;
        $this->calculateDueDate();
    }

    /**
     * Mutator: Calculate due_date when calibration_frequency is set
     */
    public function setCalibrationFrequencyAttribute($value)
    {
        $this->attributes['calibration_frequency'] = $value;
        $this->calculateDueDate();
    }
}