<?php

declare(strict_types=1);

namespace App\Application\Campaign;

use App\Framework\Attributes\Route;
use App\Framework\Http\Method;
use App\Framework\Http\Session\Session;
use App\Framework\Meta\MetaData;
use App\Framework\Router\Result\ViewResult;

/**
 * Show Campaign Landing Page
 *
 * Displays public campaign landing page with pre-save functionality
 */
final readonly class ShowCampaign
{
    public function __construct(
        private CampaignService $campaignService
    ) {
    }

    #[Route(path: '/campaign/{slug}', method: Method::GET)]
    public function __invoke(string $slug, Session $session): ViewResult
    {
        // Fetch campaign data
        $campaign = $this->campaignService->findBySlug($slug);

        if (! $campaign) {
            throw new \RuntimeException("Campaign not found: {$slug}");
        }

        // Check if user has already saved
        $userHasSaved = $this->campaignService->hasUserSaved(
            $campaign->id,
            $session->getId()
        );

        // Prepare campaign data for view
        $campaignData = [
            'slug' => $campaign->slug,
            'artist_name' => $campaign->artist_name,
            'album_title' => $campaign->album_title,
            'description' => $campaign->description,
            'artwork_url' => $campaign->artwork_url,
            'release_date' => $campaign->release_date?->format('F j, Y'),
            'total_saves' => $campaign->total_saves,
            'track_count' => $campaign->track_count,
            'spotify_enabled' => (bool) $campaign->spotify_enabled,
            'apple_music_enabled' => (bool) $campaign->apple_music_enabled,
            'tracks' => $campaign->tracks ? array_map(
                fn ($track) => [
                    'position' => $track->position,
                    'title' => $track->title,
                    'duration' => $track->duration ? $this->formatDuration($track->duration) : null,
                    'preview_url' => $track->preview_url,
                ],
                $campaign->tracks
            ) : null,
        ];

        return new ViewResult(
            'campaign-landing',
            new MetaData(
                title: $campaign->artist_name . ' - ' . $campaign->album_title,
                description: $campaign->description ?? 'Pre-save this album on Spotify',
            ),
            data: [
                'campaign' => $campaignData,
                'user_has_saved' => $userHasSaved,
                'csrf_token' => $session->csrf->generateToken('campaign-landing')->toString(),
            ]
        );
    }

    private function formatDuration(int $seconds): string
    {
        $minutes = floor($seconds / 60);
        $remainingSeconds = $seconds % 60;

        return sprintf('%d:%02d', $minutes, $remainingSeconds);
    }
}