<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

/**
 * Upload Controller
 * Replaces: uploadImage.php, uploadImagePortrate.php, uploadImageType.php, etc.
 * 
 * Security improvements over V1:
 * - MIME type + magic bytes validation (not just extension)
 * - Randomized filenames (prevents path traversal)
 * - Max file size enforcement
 * - No directory traversal possible
 * 
 * متحكم الرفع (Upload Controller)
 * 
 * الغرض من الملف:
 * التعامل مع رفع الملفات والصور (مثل صور الهوية، رخصة القيادة، الصور الشخصية، والملفات الصوتية).
 * 
 * كيفية العمل:
 * 1. يستقبل الملفات المرفوعة من التطبيق.
 * 2. يقوم بتخزين الملفات في المجلدات المخصصة لها على الخادم مع تسميتها بشكل فريد.
 * 3. يرجع رابط الملف المرفوع ليتم تخزينه في قاعدة البيانات.
 */
class UploadController extends Controller
{
    private const ALLOWED_IMAGE_MIMES = ['image/jpeg', 'image/png', 'image/webp'];
    private const ALLOWED_AUDIO_MIMES = ['audio/mpeg', 'audio/mp4', 'audio/wav', 'audio/ogg'];
    private const MAX_IMAGE_SIZE = 5 * 1024 * 1024; // 5MB
    private const MAX_AUDIO_SIZE = 10 * 1024 * 1024; // 10MB

    /** POST /v2/uploads/card-image */
    public function cardImage(Request $request): JsonResponse
    {
        return $this->handleImageUpload($request, 'card_images', 'cards');
    }

    /** POST /v2/uploads/profile-image */
    public function profileImage(Request $request): JsonResponse
    {
        return $this->handleImageUpload($request, 'imageProfileCaptain', 'profiles');
    }

    /** POST /v2/uploads/document */
    public function document(Request $request): JsonResponse
    {
        $request->validate([
            'image' => 'required|file',
            'doc_type' => 'required|string|in:license,registration,criminal,id_front,id_back,driver_license_front,driver_license_back,car_license_front,car_license_back',
        ]);

        return $this->handleImageUpload($request, 'driver_documents', 'documents');
    }

    /** POST /v2/uploads/id-front */
    public function idFront(Request $request): JsonResponse
    {
        return $this->handleImageUpload($request, 'card_images', 'ids/front');
    }

    /** POST /v2/uploads/id-back */
    public function idBack(Request $request): JsonResponse
    {
        return $this->handleImageUpload($request, 'card_images', 'ids/back');
    }

    /** POST /v2/uploads/audio */
    public function audio(Request $request): JsonResponse
    {
        $request->validate(['audio' => 'required|file']);

        $file = $request->file('audio');

        // Validate MIME
        $mime = $file->getMimeType();
        if (!in_array($mime, self::ALLOWED_AUDIO_MIMES)) {
            return response()->json(['status' => 'failure', 'message' => 'Invalid audio format'], 400);
        }

        if ($file->getSize() > self::MAX_AUDIO_SIZE) {
            return response()->json(['status' => 'failure', 'message' => 'File too large'], 400);
        }

        $userId = $request->attributes->get('_jwt_user_id');
        $ext = $file->getClientOriginalExtension() ?: 'mp3';
        $filename = 'audio_' . Str::random(24) . '.' . $ext;

        $uploadPath = public_path('uploads/audio');
        if (!is_dir($uploadPath)) mkdir($uploadPath, 0755, true);

        $file->move($uploadPath, $filename);

        $link = config('intaleq.upload_base_url') . '/uploads/audio/' . $filename;

        return response()->json([
            'status' => 'success',
            'data' => ['link' => $link, 'filename' => $filename],
        ], 201);
    }

    /**
     * Core image upload handler
     */
    private function handleImageUpload(Request $request, string $table, string $subDir): JsonResponse
    {
        $request->validate(['image' => 'required|file']);

        $file = $request->file('image');

        // Validate MIME type
        $mime = $file->getMimeType();
        if (!in_array($mime, self::ALLOWED_IMAGE_MIMES)) {
            return response()->json(['status' => 'failure', 'message' => 'Invalid image format. Allowed: JPG, PNG, WebP'], 400);
        }

        // Validate file size
        if ($file->getSize() > self::MAX_IMAGE_SIZE) {
            return response()->json(['status' => 'failure', 'message' => 'File too large (max 5MB)'], 400);
        }

        // Validate magic bytes (defense in depth)
        $firstBytes = file_get_contents($file->getRealPath(), false, null, 0, 4);
        if (!$this->validateMagicBytes($firstBytes, $mime)) {
            return response()->json(['status' => 'failure', 'message' => 'File content does not match type'], 400);
        }

        // Generate safe filename
        $userId = $request->attributes->get('_jwt_user_id');
        $ext = match ($mime) {
            'image/jpeg' => 'jpg',
            'image/png' => 'png',
            'image/webp' => 'webp',
            default => 'jpg',
        };
        $filename = $subDir . '_' . Str::random(24) . '.' . $ext;

        $uploadPath = public_path('uploads/' . $subDir);
        if (!is_dir($uploadPath)) mkdir($uploadPath, 0755, true);

        $file->move($uploadPath, $filename);

        $link = config('intaleq.upload_base_url') . '/uploads/' . $subDir . '/' . $filename;

        // Save to DB
        $dbData = [
            'driverID' => $userId,
            'image_name' => $filename,
            'link' => $link,
            'upload_date' => now(),
        ];

        if ($request->has('doc_type')) {
            $dbData['doc_type'] = $request->input('doc_type');
        }

        DB::connection('ride')->table($table)->insert($dbData);

        return response()->json([
            'status' => 'success',
            'data' => ['link' => $link, 'filename' => $filename],
        ], 201);
    }

    /**
     * Validate file magic bytes match the declared MIME type
     */
    private function validateMagicBytes(string $bytes, string $mime): bool
    {
        return match ($mime) {
            'image/jpeg' => str_starts_with($bytes, "\xFF\xD8\xFF"),
            'image/png' => str_starts_with($bytes, "\x89\x50\x4E\x47"),
            'image/webp' => str_starts_with($bytes, "RIFF"),
            default => false,
        };
    }
}