<?php

declare(strict_types=1);

use App\Models\Artwork;

function encodeLegacyPhotoId(int $value, string $chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'): string
{
    if ($value === 0) {
        return '0';
    }

    $encoded = '';

    while ($value > 0) {
        $encoded = $chars[$value % 62] . $encoded;
        $value = intdiv($value, 62);
    }

    return $encoded;
}

it('redirects legacy photo thumbnail urls to the mapped CDN thumbnail size', function (): void {
    config([
        'cdn.files_url' => 'https://cdn.example.test',
        'uploads.object_storage.prefix' => 'artworks',
    ]);

    $artwork = Artwork::factory()->create([
        'hash' => 'aabbccddeeff0011',
        'thumb_ext' => 'webp',
        'file_ext' => 'jpg',
        'file_path' => '',
    ]);

    $response = $this->get('/photo/' . encodeLegacyPhotoId($artwork->id) . '_6.png');

    $response
        ->assertStatus(301)
        ->assertRedirect('https://cdn.example.test/artworks/md/aa/bb/aabbccddeeff0011.webp');
});

it('redirects legacy full-size photo urls to the original CDN asset', function (): void {
    config([
        'cdn.files_url' => 'https://cdn.example.test',
        'uploads.object_storage.prefix' => 'artworks',
    ]);

    $artwork = Artwork::factory()->create([
        'hash' => '1122334455667788',
        'thumb_ext' => 'webp',
        'file_ext' => 'png',
        'file_path' => '',
    ]);

    $response = $this->get('/photo/' . encodeLegacyPhotoId($artwork->id) . '_7.png');

    $response
        ->assertStatus(301)
        ->assertRedirect('https://cdn.example.test/artworks/original/11/22/1122334455667788.png');
});

it('returns a cheap 404 for zero or invalid decoded photo ids', function (): void {
    $this->get('/photo/0_6.png')->assertNotFound();
    $this->head('/photo/0_6.png')->assertNotFound();
});

it('returns 404 for a nonexistent artwork', function (): void {
    $this->get('/photo/' . encodeLegacyPhotoId(999999) . '_6.png')->assertNotFound();
});

it('returns 404 for private, unapproved, or unpublished artworks', function (): void {
    $private = Artwork::factory()->create(['is_public' => false, 'hash' => 'aabbccddeeff0011', 'thumb_ext' => 'webp']);
    $unapproved = Artwork::factory()->create(['is_approved' => false, 'hash' => 'bbccddeeff001122', 'thumb_ext' => 'webp']);
    $unpublished = Artwork::factory()->create(['published_at' => null, 'hash' => 'ccddeeff00112233', 'thumb_ext' => 'webp']);

    $this->get('/photo/' . encodeLegacyPhotoId($private->id) . '_6.png')->assertNotFound();
    $this->get('/photo/' . encodeLegacyPhotoId($unapproved->id) . '_6.png')->assertNotFound();
    $this->get('/photo/' . encodeLegacyPhotoId($unpublished->id) . '_6.png')->assertNotFound();
});

it('returns 404 for eligible legacy artwork with no usable media instead of redirecting to a dead CDN path', function (): void {
    config(['cdn.files_url' => 'https://cdn.example.test']);

    $artwork = Artwork::factory()->create([
        'hash' => null,
        'thumb_ext' => null,
        'file_ext' => null,
        'file_path' => 'legacy/uploads/old-photo.jpg',
        'is_public' => true,
        'is_approved' => true,
        'published_at' => now()->subDay(),
    ]);

    $this->get('/photo/' . encodeLegacyPhotoId($artwork->id) . '_6.png')->assertNotFound();
    $this->get('/photo/' . encodeLegacyPhotoId($artwork->id) . '_7.png')->assertNotFound();
});

it('maps size 3 to the sm thumbnail variant', function (): void {
    config([
        'cdn.files_url' => 'https://cdn.example.test',
        'uploads.object_storage.prefix' => 'artworks',
    ]);

    $artwork = Artwork::factory()->create([
        'hash' => 'aabbccddeeff0011',
        'thumb_ext' => 'webp',
        'file_ext' => 'jpg',
        'file_path' => '',
    ]);

    $this->get('/photo/' . encodeLegacyPhotoId($artwork->id) . '_3.png')
        ->assertStatus(301)
        ->assertRedirect('https://cdn.example.test/artworks/sm/aa/bb/aabbccddeeff0011.webp');
});

it('preserves HEAD redirects for valid modern hash-based photos', function (): void {
    config([
        'cdn.files_url' => 'https://cdn.example.test',
        'uploads.object_storage.prefix' => 'artworks',
    ]);

    $artwork = Artwork::factory()->create([
        'hash' => 'aabbccddeeff0011',
        'thumb_ext' => 'webp',
        'file_ext' => 'jpg',
        'file_path' => '',
    ]);

    $this->head('/photo/' . encodeLegacyPhotoId($artwork->id) . '_6.png')
        ->assertStatus(301)
        ->assertRedirect('https://cdn.example.test/artworks/md/aa/bb/aabbccddeeff0011.webp');
});