<?php

declare(strict_types=1);

namespace App\Http\Controllers\Studio;

use App\Http\Controllers\Controller;
use App\Services\News\NewsCoverImageService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use RuntimeException;

final class StudioNewsMediaApiController extends Controller
{
    public function __construct(private readonly NewsCoverImageService $covers)
    {
    }

    public function store(Request $request): JsonResponse
    {
        $this->authorizeNews($request);

        $validated = $request->validate([
            'image' => [
                'required',
                'file',
                'image',
                'max:' . $this->covers->maxFileSizeKb(),
                'mimes:jpg,jpeg,png,webp',
                'mimetypes:image/jpeg,image/png,image/webp',
            ],
        ]);

        $file = $validated['image'];

        try {
            $stored = $this->covers->storeUploadedFile($file);

            return response()->json([
                'success' => true,
                'path' => $stored['path'],
                'url' => $stored['url'],
                'width' => $stored['width'],
                'height' => $stored['height'],
                'mime_type' => 'image/webp',
                'size_bytes' => $stored['size_bytes'],
                'mobile_url' => $stored['mobile_url'],
                'desktop_url' => $stored['desktop_url'],
                'srcset' => $stored['srcset'],
            ]);
        } catch (RuntimeException $e) {
            return response()->json([
                'error' => 'Validation failed',
                'message' => $e->getMessage(),
            ], 422);
        } catch (\Throwable $e) {
            logger()->error('News media upload failed', [
                'user_id' => (int) ($request->user()?->id ?? 0),
                'message' => $e->getMessage(),
            ]);

            return response()->json([
                'error' => 'Upload failed',
                'message' => 'Could not upload image right now.',
            ], 500);
        }
    }

    public function destroy(Request $request): JsonResponse
    {
        $this->authorizeNews($request);

        $validated = $request->validate([
            'path' => ['required', 'string', 'max:2048'],
        ]);

        $this->covers->deleteManagedFiles((string) $validated['path']);

        return response()->json([
            'success' => true,
        ]);
    }

    /**
     * @return array{path:string,width:int,height:int,size_bytes:int}
     */
    private function storeMediaFile(UploadedFile $file): array
    {
        $this->assertImageManager();
        $this->assertStorageIsAllowed();

        $uploadPath = (string) ($file->getRealPath() ?: $file->getPathname());

        if ($uploadPath === '' || ! is_readable($uploadPath)) {
            throw new RuntimeException('Unable to resolve uploaded image path.');
        }

        $raw = file_get_contents($uploadPath);
        if ($raw === false || $raw === '') {
            throw new RuntimeException('Unable to read uploaded image.');
        }

        $finfo = new \finfo(FILEINFO_MIME_TYPE);
        $mime = strtolower((string) $finfo->buffer($raw));
        if (! in_array($mime, self::ALLOWED_MIME_TYPES, true)) {
            throw new RuntimeException('Unsupported image mime type.');
        }

        $size = @getimagesizefromstring($raw);
        if (! is_array($size) || ($size[0] ?? 0) < 1 || ($size[1] ?? 0) < 1) {
            throw new RuntimeException('Uploaded file is not a valid image.');
        }

        $width = (int) ($size[0] ?? 0);
        $height = (int) ($size[1] ?? 0);

        if ($width < self::MIN_WIDTH || $height < self::MIN_HEIGHT) {
            throw new RuntimeException(sprintf(
                'Image is too small. Minimum required size is %dx%d.',
                self::MIN_WIDTH,
                self::MIN_HEIGHT,
            ));
        }

        $image = $this->manager->read($raw)->scaleDown(width: self::MAX_WIDTH, height: self::MAX_HEIGHT);
        $encoded = (string) $image->encode(new WebpEncoder(85));

        $hash = hash('sha256', $encoded);
        $path = $this->mediaPath($hash);
        $disk = Storage::disk($this->mediaDiskName());

        $written = $disk->put($path, $encoded, [
            'visibility' => 'public',
            'CacheControl' => 'public, max-age=31536000, immutable',
            'ContentType' => 'image/webp',
        ]);

        if ($written !== true) {
            throw new RuntimeException('Unable to store image in object storage.');
        }

        return [
            'path' => $path,
            'width' => (int) $image->width(),
            'height' => (int) $image->height(),
            'size_bytes' => strlen($encoded),
        ];
    }

    private function authorizeNews(Request $request): void
    {
        abort_unless($request->user() && ($request->user()->isAdmin() || $request->user()->isModerator()), 403);
    }
}