<?php

namespace App\Services\ClassProgress;

use App\Models\ClassProgressAttachment;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;

class ClassProgressAttachmentService
{
    public function storeAttachments(int $reportId, array $files): array
    {
        if ($files === []) {
            return [];
        }

        $stored = [];
        foreach ($files as $file) {
            if (!$file instanceof UploadedFile || !$file->isValid()) {
                continue;
            }

            $path = $this->storeAttachment($file);
            $stored[] = [
                'report_id' => $reportId,
                'file_path' => $path,
                'original_name' => $file->getClientOriginalName(),
                'mime_type' => $file->getClientMimeType(),
                'file_size' => $file->getSize(),
                'created_at' => now(),
            ];
        }

        if ($stored !== []) {
            ClassProgressAttachment::query()->insert($stored);
        }

        return $stored;
    }

    public function resolvePath(string $path): ?string
    {
        $path = trim($path);
        if ($path === '') {
            return null;
        }

        $candidates = [];
        if (str_starts_with($path, 'storage/')) {
            $relative = ltrim(substr($path, strlen('storage/')), '/');
            $candidates[] = storage_path('app/public/' . $relative);
        }

        if (str_starts_with($path, 'writable/uploads/')) {
            $relative = ltrim(substr($path, strlen('writable/uploads/')), '/');
            $candidates[] = storage_path('app/' . $relative);
            $candidates[] = storage_path('app/public/' . $relative);
        }

        $candidates[] = storage_path('app/' . ltrim($path, '/'));
        $candidates[] = storage_path('app/public/' . ltrim($path, '/'));

        foreach ($candidates as $candidate) {
            if (is_file($candidate)) {
                return $candidate;
            }
        }

        return null;
    }

    private function storeAttachment(UploadedFile $file): string
    {
        $disk = (string) config('progress.attachments.disk', 'public');
        $directory = (string) config('progress.attachments.directory', 'class_material');

        try {
            $path = $file->store($directory, $disk);
        } catch (\Throwable $e) {
            Log::error('Failed to store class progress attachment.', [
                'error' => $e->getMessage(),
            ]);
            throw $e;
        }

        return 'storage/' . ltrim($path, '/');
    }
}