<?php

namespace App\Api;

use Carbon\Carbon;
use Illuminate\Support\Facades\Storage;
use Intervention\Image\Facades\Image as Imagee;

class ImageResize
{
    /**
     * @param string $type
     * @return string  relative path used as S3 key, e.g. uploads/posters/thumbs/2024/01/01
     */
    private function thumbFolder(string $type): string
    {
        $folder = Carbon::now()->format('Y/m/d');
        return "uploads/{$type}/thumbs/{$folder}";
    }

    /**
     * Resize an image and upload to S3/MinIO (or save locally).
     *
     * @param string $path        Relative path of the source image (from 'public' disk = storage/app/public/)
     * @param int    $size        Target width in pixels
     * @param string $type        Subfolder name (posters, screens, brands …)
     * @param bool   $deleteOriginal  Delete the source file after resizing
     * @return string             Relative path (S3 key) of the generated thumb
     */
    public function resize(string $path, int $size, string $type, bool $deleteOriginal = false): string
    {
        // 1. Locate the source file (stored via ->store('temp', 'public'))
        $srcPath = storage_path('app/public/' . $path);

        if (!file_exists($srcPath)) {
            throw new \Exception("Source image not found: {$srcPath}");
        }

        // 2. Resize into a temp file in storage/app/public/tmp/
        $tmpDir = storage_path('app/public/tmp');
        if (!is_dir($tmpDir)) {
            mkdir($tmpDir, 0775, true);
        }

        $thumbFilename = basename($path);
        $tmpThumb      = "{$tmpDir}/{$thumbFilename}";

        $img = Imagee::make($srcPath);
        $img->resize($size, null, function ($constraint) {
            $constraint->aspectRatio();
        });
        $img->save($tmpThumb, 90);

        // 3. Upload thumb to S3/MinIO
        $thumbKey = $this->thumbFolder($type) . '/' . $thumbFilename;

        if (env('FILESYSTEM_DISK') === 's3') {
            Storage::disk('s3')->put($thumbKey, file_get_contents($tmpThumb));
        } else {
            // Local: move to public/uploads/…/thumbs/…
            $localDir = public_path(dirname($thumbKey));
            if (!is_dir($localDir)) {
                mkdir($localDir, 0775, true);
            }
            rename($tmpThumb, public_path($thumbKey));
        }

        // 4. Clean up tmp thumb
        if (file_exists($tmpThumb)) {
            unlink($tmpThumb);
        }

        // 5. Clean up original temp file if requested
        if ($deleteOriginal && file_exists($srcPath)) {
            unlink($srcPath);
        }

        return $thumbKey;
    }
}