<?php

namespace App\Service\MediaProcessing;

use App\Models\Episode;
use App\Models\ItemToFetchJobs;
use App\Models\Person;
use App\Models\Season;
use App\Models\Show;
use App\Models\ShowAlternativeTitle;
use App\Service\TMDBApi\PersonApi;
use App\Service\TMDBApi\ShowsApi;
use Illuminate\Support\Str;
use function PHPUnit\Framework\containsIdentical;

class ShowProcessingService implements ProcessingInterface
{
    private ShowsApi $showsApi;
    private PersonApi $personApi;

    public function __construct(
        ShowsApi $showsApi,
        PersonApi $personApi
    ) {
        $this->showsApi = $showsApi;
        $this->personApi = $personApi;
    }

    public function process($item, $job)
    {
        $methodName = "get".ucfirst($job);

        if (!method_exists($this, $methodName)) {
            // @todo maybe raise an exception here
            return;
        }

        $this->$methodName($item);
    }

    private function getDetails($item)
    {
        $tmdbShow = $this->showsApi->getTvshow($item->tmdb_id);
        $tmdbShow['tmdb_id'] = $tmdbShow['id'];

        $show = Show::where('tmdb_id', $item->tmdb_id)->first();

        if ($show) {
            return;
        }

        $tmdbShow['slug'] = Str::slug($tmdbShow['name'].'-'.$tmdbShow['tmdb_id']);
        $tmdbShow['first_air_date'] = $tmdbShow['first_air_date'] ? new \DateTime($tmdbShow['first_air_date']) : null;
        $tmdbShow['last_air_date'] = $tmdbShow['last_air_date'] ? new \DateTime($tmdbShow['last_air_date']) : null;

        $show = Show::create($tmdbShow);

        if (!empty($tmdbShow['seasons'])) {
            $this->processSeasons($show, $tmdbShow['seasons']);
        }

        $this->removeElementFromRemainingJobs($item->tmdb_id, ItemToFetchJobs::JOB_DETAILS);
    }

    private function getAlternativeTitles($item)
    {
        $tmdbAlternativeTitles = $this->showsApi->getAlternativeTitles($item->tmdb_id);

        if (empty($tmdbAlternativeTitles) ||empty($tmdbAlternativeTitles['results'])) {
            return;
        }

        $show = Show::where('tmdb_id', $item->tmdb_id)->first();

        foreach ($tmdbAlternativeTitles['results'] as $tmdbAlternativeTitle) {
            $alternativeTitle = ShowAlternativeTitle::where('show_id', $show->id)
                ->where('iso', $tmdbAlternativeTitle['iso_3166_1'])
                ->first();

            if (!$alternativeTitle) {
                ShowAlternativeTitle::create([
                    'iso' => $tmdbAlternativeTitle['iso_3166_1'],
                    'title' => $tmdbAlternativeTitle['title'],
                    'show_id' => $show->id,
                    'type' => $tmdbAlternativeTitle['type'],
                ]);
            }
        }

        $this->removeElementFromRemainingJobs($item->tmdb_id, ItemToFetchJobs::JOB_ALTERNVATIVE_TITLES);
    }

    private function getCredits($item)
    {
        $tmdbCredits = $this->showsApi->getCredits($item->tmdb_id);

        if (empty($tmdbCredits)) {
            return;
        }

        $show = Show::where('tmdb_id', $item->tmdb_id)->first();

        $this->processCast($show, $tmdbCredits['cast'] ?? []);
        $this->processCrew($show, $tmdbCredits['crew'] ?? []);

        $this->removeElementFromRemainingJobs($item->tmdb_id, ItemToFetchJobs::JOB_CREDITS);
    }

    private function processSeasons(Show $show, array $seasons)
    {
        foreach ($seasons as $season) {
            $showSeason = Season::where('tmdb_id', $season['id'])
                ->where('show_id', $show->id)
                ->first();

            if (!$showSeason) {
                $showSeason =  Season::create($season);

                $tmdbSeasonDetails = $this->showsApi->getSeasonDetails($show->tmdb_id, $season['season_number']);

                $this->processEpisodes($show, $showSeason, $tmdbSeasonDetails['episodes'] ?? []);
            }
        }
    }

    private function processEpisodes($show, $season, array $tmdbEpisodes)
    {
        if (empty($tmdbEpisodes)) {
            return;
        }

        foreach ($tmdbEpisodes as $tmdbEpisode) {
            $episode = Episode::where('show_id', $show->id)
                ->where('season_id', $season->id)
                ->where('tmdb_id', $tmdbEpisode['id'])
                ->first();

            if (!$episode) {
                $tmdbEpisode['tmdb_id'] = $tmdbEpisode['id'];
                $tmdbEpisode['slug'] = Str::slug($tmdbEpisode['name']);
                $tmdbEpisode['tmdb_show_id'] = $tmdbEpisode['show_id'];
                $tmdbEpisode['show_id'] = $show->id;
                $tmdbEpisode['tmdb_id'] = $season->id;

                Episode::create($tmdbEpisode);
            }
        }
    }

    private function removeElementFromRemainingJobs(int $tmdbId, string $job)
    {
        $itemToFetchJobs = ItemToFetchJobs::where('tmdb_id', $tmdbId)->first();

        $remainingJobs = $itemToFetchJobs->remaining_jobs;

        if (is_string($remainingJobs)) {
            $remainingJobs = json_decode($remainingJobs, true);
        }

        $remainingJobKey = array_search($job, $remainingJobs);

        unset($remainingJobs[$remainingJobKey]);

        if (empty($remainingJobs)) {
            $itemToFetchJobs->delete();
        }

        $itemToFetchJobs->remaining_jobs = $remainingJobs;
        $itemToFetchJobs->save();
    }

    private function processCast($show, array $credits)
    {
        if (empty($credits)) {
            return;
        }

        foreach ($credits as $castPerson) {
            $person = Person::where('tmdb_id', $castPerson['id'])->first();

            if (!$person) {
                $personData = [
                    'adult' => $castPerson['adult'],
                    'tmdb_id' => $castPerson['id'],
                    'gender' => $castPerson['gender'],
                    'name' => $castPerson['name'],
                    'slug' => Str::slug($castPerson['name']),
                    'popularity' => $castPerson['popularity'],
                    'profile_path' => $castPerson['profile_path'],
                ];

                $tmdbPerson = $this->personApi->getPerson($castPerson['id']);

                if (!empty($tmdbPerson)) {
                    $personData = array_merge($personData, [
                        'biography' => $tmdbPerson['biography'],
                        'birtday' => $tmdbPerson['birthday'],
                        'deathday' => $tmdbPerson['deathday'],
                        'homepage' => $tmdbPerson['homepage'],
                        'imdb_id' => $tmdbPerson['imdb_id'],
                        'known_for_department' => $tmdbPerson['known_for_department'] ? json_encode($tmdbPerson['known_for_department']) : null,
                        'also_known_as' => $tmdbPerson['also_known_as'] ? json_encode($tmdbPerson['also_known_as']) : null,
                        'place_of_birth' => $tmdbPerson['place_of_birth'],
                    ]);
                }

                $person = Person::create($personData);
            }

            if ($show->whereHas('castList', function ($query) use ($person) {
                $query->where('tmdb_id', '=', $person->tmdb_id);
            })->exists()) {
                return;
            } else {
                $show->castList()->attach($person, [
                    'known_for_department' => $castPerson['known_for_department'],
                    'character' => $castPerson['character'],
                    'tmdb_cast_id' => $castPerson['cast_id'],
                    'order' => $castPerson['order'],
                ]);
            }
        }
    }

    private function processCrew($show, array $credits)
    {
        if (empty($credits)) {
            return;
        }

        foreach ($credits as $crewPerson) {
            $person = Person::where('tmdb_id', $crewPerson['id'])->first();

            if (!$person) {
                $personData = [
                    'adult' => $crewPerson['adult'],
                    'tmdb_id' => $crewPerson['id'],
                    'gender' => $crewPerson['gender'],
                    'name' => $crewPerson['name'],
                    'slug' => Str::slug($crewPerson['name']),
                    'popularity' => $crewPerson['popularity'],
                    'profile_path' => $crewPerson['profile_path'],
                ];

                $tmdbPerson = $this->personApi->getPerson($crewPerson['id']);

                if (!empty($tmdbPerson)) {
                    $personData = array_merge($personData, [
                        'biography' => $tmdbPerson['biography'],
                        'birtday' => $tmdbPerson['birthday'],
                        'deathday' => $tmdbPerson['deathday'],
                        'homepage' => $tmdbPerson['homepage'],
                        'imdb_id' => $tmdbPerson['imdb_id'],
                        'known_for_department' => $tmdbPerson['known_for_department'] ? json_encode($tmdbPerson['known_for_department']) : null,
                        'also_known_as' => $tmdbPerson['also_known_as'] ? json_encode($tmdbPerson['also_known_as']) : null,
                        'place_of_birth' => $tmdbPerson['place_of_birth'],
                    ]);
                }

                $person = Person::create($personData);
            }

            if ($show->whereHas('crewList', function ($query) use ($person) {
                $query->where('tmdb_id', '=', $person->tmdb_id);
            })->exists()) {
                return;
            } else {
                $show->crewList()->attach($person, [
                    'known_for_department' => json_encode($crewPerson['known_for_department']),
                    'job' => $crewPerson['job'],
                    'department' => $crewPerson['department'],
                    'tmdb_cast_id' => $crewPerson['credit_id'],
                ]);
            }
        }
    }
}