<?php

declare(strict_types=1);

namespace App\Observers;

use App\Models\Patient;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;

class PatientObserver
{
    private const FILE_FIELDS = ['photos_before', 'photos_after', 'videos', 'audio_files'];

    public function creating(Patient $patient): void
    {
        if (empty($patient->file_number)) {
            $max = DB::table('patients')->max('file_number');
            $patient->file_number = max(100, ($max ?? 99) + 1);
        }
    }

    public function updating(Patient $patient): void
    {
        foreach (self::FILE_FIELDS as $field) {
            $rawOld   = $patient->getRawOriginal($field);
            $oldFiles = ! empty($rawOld) ? (json_decode($rawOld, true) ?? []) : [];
            $newFiles = array_values((array) ($patient->getAttribute($field) ?? []));
            $removed  = array_diff($oldFiles, $newFiles);

            foreach ($removed as $path) {
                if (! empty(trim((string) $path))) {
                    Storage::disk('public')->delete($path);
                }
            }
        }
    }

    public function deleting(Patient $patient): void
    {
        foreach (self::FILE_FIELDS as $field) {
            $files = $patient->getAttribute($field) ?? [];

            foreach ((array) $files as $path) {
                Storage::disk('public')->delete($path);
            }
        }
    }
}