<?php

namespace App\Livewire;

use App\Enums\UserRole;
use App\Jobs\DiscordReleaseNotification;
use App\Models\Episode;
use App\Services\CdnPathValidator;
use App\Services\DownloadService;
use App\Services\EpisodeService;
use App\Services\GalleryService;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\Log;
use Livewire\Component;
use Livewire\Features\SupportFileUploads\TemporaryUploadedFile;
use Livewire\WithFileUploads;

class AdminEpisodeForm extends Component
{
    use WithFileUploads;

    public int $referenceEpisodeId;

    public int $episodeNumber;

    public string $title = '';

    public string $titleJpn = '';

    public string $studio = '';

    /** @var string[] */
    public array $tags = [];

    public string $releasedate = '';

    public string $baseurl = '';

    public string $description = '';

    public ?TemporaryUploadedFile $cover = null;

    /** @var TemporaryUploadedFile[] */
    public array $gallery = [];

    /** @var array{fhd: string, fhdi: string, uhd: string, uhdi: string} */
    public array $downloads = ['fhd' => '', 'fhdi' => '', 'uhd' => '', 'uhdi' => ''];

    public bool $censored = false;

    /** @var array<string, array{state: string, message: string, mirrors: array}> */
    public array $validation = [];

    public bool $overrideValidation = false;

    public bool $saving = false;

    public function mount(int $episodeId): void
    {
        abort_unless(auth()->user()?->hasRole(UserRole::ADMINISTRATOR), 403);

        $reference = Episode::with(['hentai', 'studio'])->findOrFail($episodeId);

        $this->referenceEpisodeId = $reference->id;
        $this->episodeNumber = $reference->hentai->episodes()->count() + 1;

        $this->title = $reference->title;
        $this->titleJpn = $reference->title_jpn;
        $this->studio = $reference->studio?->name ?? '';
        $this->tags = $reference->tags->pluck('name')->all();
        $this->releasedate = $reference->release_date
            ? Carbon::parse($reference->release_date)->format('Y-m-d')
            : now()->format('Y-m-d');

        $this->baseurl = preg_replace('#/E\d+$#', '', $reference->url) ?? '';
        $this->description = $reference->description;
    }

    public function getHasInvalidValidationProperty(): bool
    {
        foreach ($this->validation as $status) {
            if (($status['state'] ?? '') === 'invalid') {
                return true;
            }
        }

        return false;
    }

    public function updatedBaseurl(): void
    {
        $this->validateStream();
    }

    public function updatedDownloads(mixed $value, string $key): void
    {
        if (preg_match('/^(fhd|fhdi|uhd|uhdi)$/', $key)) {
            $this->validateDownload($key);
        }
    }

    public function validateStream(): void
    {
        $baseurl = trim($this->baseurl);

        if ($baseurl === '') {
            $this->validation['stream'] = ['state' => 'idle', 'message' => '', 'mirrors' => []];

            return;
        }

        $this->validation['stream'] = ['state' => 'checking', 'message' => 'Checking mirrors…', 'mirrors' => []];

        $result = app(CdnPathValidator::class)->validateStream($baseurl, 1, false, $this->episodeNumber);

        $this->validation['stream'] = [
            'state' => $result['valid'] ? 'valid' : 'invalid',
            'message' => $result['valid'] ? 'Verified on all mirrors' : 'Missing on one or more mirrors',
            'mirrors' => $result['mirrors'],
        ];
    }

    public function validateDownload(string $quality): void
    {
        $key = "downloads.{$quality}";
        $url = $this->downloads[$quality] ?? '';

        if (trim($url) === '') {
            $this->validation[$key] = ['state' => 'idle', 'message' => '', 'mirrors' => []];

            return;
        }

        $this->validation[$key] = ['state' => 'checking', 'message' => 'Checking mirrors…', 'mirrors' => []];

        $result = app(CdnPathValidator::class)->validateDownload($this->qualityToType($quality), $url);

        $this->validation[$key] = [
            'state' => $result['valid'] ? 'valid' : 'invalid',
            'message' => $result['valid'] ? 'Verified on all mirrors' : 'Missing on one or more mirrors',
            'mirrors' => $result['mirrors'],
        ];
    }

    public function save(): void
    {
        abort_unless(auth()->user()?->hasRole(UserRole::ADMINISTRATOR), 403);

        $this->validate([
            'baseurl' => ['required', 'string', 'regex:/^[A-Za-z0-9_.\-]+\/[A-Za-z0-9_.\-]+/'],
            'description' => 'required|string',
            'cover' => 'required|image|max:20480',
            'gallery.*' => 'nullable|image|max:20480',
            'downloads.fhd' => 'required|string',
            'downloads.uhd' => 'required|string',
            'downloads.fhdi' => 'nullable|string',
            'downloads.uhdi' => 'nullable|string',
        ]);

        $this->saving = true;

        try {
            // Re-load the reference episode fresh so the episode number reflects
            // the current episode count rather than the mount-time value.
            $referenceEpisode = Episode::with(['hentai', 'studio'])->findOrFail($this->referenceEpisodeId);
            $hentai = $referenceEpisode->hentai;
            $this->episodeNumber = $hentai->episodes()->count() + 1;

            // Re-validate every non-empty download path + stream against the CDN.
            $validator = app(CdnPathValidator::class);
            $sizes = [];

            foreach ($this->downloads as $quality => $url) {
                if (trim($url) === '') {
                    continue;
                }

                $type = $this->qualityToType($quality);
                $key = "downloads.{$quality}";
                $result = $validator->validateDownload($type, $url, true);

                $this->validation[$key] = [
                    'state' => $result['valid'] ? 'valid' : 'invalid',
                    'message' => $result['valid'] ? 'Verified on all mirrors' : 'Missing on one or more mirrors',
                    'mirrors' => $result['mirrors'],
                ];
                $sizes[$type] = $result['size'];

                if (! $result['valid'] && ! $this->overrideValidation) {
                    $this->addError($key, 'Path not found on all CDN mirrors.');
                    $this->saving = false;

                    return;
                }
            }

            $result = $validator->validateStream($this->baseurl, 1, true, $this->episodeNumber);

            $this->validation['stream'] = [
                'state' => $result['valid'] ? 'valid' : 'invalid',
                'message' => $result['valid'] ? 'Verified on all mirrors' : 'Missing on one or more mirrors',
                'mirrors' => $result['mirrors'],
            ];

            if (! $result['valid'] && ! $this->overrideValidation) {
                $this->addError('baseurl', 'Stream path not found on all CDN mirrors.');
                $this->saving = false;

                return;
            }

            // Persist.
            $episodeService = app(EpisodeService::class);
            $studio = $episodeService->getOrCreateStudio(trim($this->studio));

            $episodeModel = $episodeService->createEpisodeFromArray([
                'title' => $this->title,
                'title_jpn' => $this->titleJpn,
                'baseurl' => $this->baseurl,
                'description' => $this->description,
                'releasedate' => $this->releasedate,
                'tags' => $this->tags,
                'interpolated_uhd' => trim($this->downloads['uhdi'] ?? '') !== '',
            ], $hentai, $this->episodeNumber, $studio);

            if ($this->cover) {
                $episodeService->saveCoverFromFile($episodeModel, $hentai->slug, $this->episodeNumber, $this->cover);
            }

            if (! empty($this->gallery)) {
                app(GalleryService::class)->saveGalleryFiles($hentai, $episodeModel, $this->episodeNumber, $this->gallery);
            }

            $downloads = [];
            foreach ($this->downloads as $quality => $url) {
                if (trim($url) === '') {
                    continue;
                }

                $type = $this->qualityToType($quality);
                $downloads[$type] = [
                    'url' => trim($url),
                    'size' => $sizes[$type] ?? null,
                ];
            }
            app(DownloadService::class)->createOrUpdateDownloadsFromArray($episodeModel, $downloads);

            // Discord notifications + cache flush.
            if ($this->censored) {
                DiscordReleaseNotification::dispatch($this->title.' - '.$this->episodeNumber, 'release-censored');
            } else {
                DiscordReleaseNotification::dispatch($episodeModel->slug, 'release');
            }

            cache()->flush();
        } catch (\Throwable $e) {
            Log::error('Failed to create episode from Livewire form: '.$e->getMessage(), [
                'exception' => $e,
                'referenceEpisodeId' => $this->referenceEpisodeId,
            ]);
            $this->saving = false;
            $this->addError('description', 'Something went wrong while saving. Please try again.');

            return;
        }

        $this->redirectRoute('hentai.index', ['title' => $episodeModel->slug]);
    }

    private function qualityToType(string $quality): string
    {
        return match ($quality) {
            'fhd' => 'FHD',
            'fhdi' => 'FHDi',
            'uhd' => 'UHD',
            'uhdi' => 'UHDi',
        };
    }

    public function render()
    {
        return view('livewire.admin-episode-form');
    }
}