<?php

declare(strict_types=1);

namespace App\Services\Search\Support;

use App\Support\ReleaseSearchIndexDocument;
use Illuminate\Database\Query\Builder;
use Illuminate\Support\Facades\DB;

/**
 * Single database projection used to build complete release search documents.
 */
final class ReleaseIndexProjection
{
    public static function query(): Builder
    {
        $isSqlite = DB::connection()->getDriverName() === 'sqlite';
        $mediaInfo = self::mediaInfoQuery();
        $filename = $isSqlite
            ? "COALESCE((SELECT GROUP_CONCAT(rf.name, ' ') FROM release_files rf WHERE rf.releases_id = r.id), '')"
            : "COALESCE((SELECT GROUP_CONCAT(rf.name SEPARATOR ' ') FROM release_files rf WHERE rf.releases_id = r.id), '')";
        $audioFormat = $isSqlite
            ? "COALESCE((SELECT GROUP_CONCAT(ad.audioformat, ' ') FROM audio_data ad WHERE ad.releases_id = r.id), '')"
            : "COALESCE((SELECT GROUP_CONCAT(ad.audioformat SEPARATOR ' ') FROM audio_data ad WHERE ad.releases_id = r.id), '')";
        $audioChannels = $isSqlite
            ? "COALESCE((SELECT GROUP_CONCAT(ad.audiochannels, ' ') FROM audio_data ad WHERE ad.releases_id = r.id), '')"
            : "COALESCE((SELECT GROUP_CONCAT(ad.audiochannels SEPARATOR ' ') FROM audio_data ad WHERE ad.releases_id = r.id), '')";
        $audioLanguage = $isSqlite
            ? "COALESCE((SELECT GROUP_CONCAT(ad.audiolanguage, ' ') FROM audio_data ad WHERE ad.releases_id = r.id), '')"
            : "COALESCE((SELECT GROUP_CONCAT(ad.audiolanguage SEPARATOR ' ') FROM audio_data ad WHERE ad.releases_id = r.id), '')";
        $subtitleLanguage = $isSqlite
            ? "COALESCE((SELECT GROUP_CONCAT(rs.subslanguage, ' ') FROM release_subtitles rs WHERE rs.releases_id = r.id), '')"
            : "COALESCE((SELECT GROUP_CONCAT(rs.subslanguage SEPARATOR ' ') FROM release_subtitles rs WHERE rs.releases_id = r.id), '')";
        $categoryName = $isSqlite
            ? "cp.title || ' > ' || c.title"
            : "CONCAT(cp.title, ' > ', c.title)";

        return DB::table('releases as r')
            ->leftJoin('usenet_groups as g', 'g.id', '=', 'r.groups_id')
            ->leftJoin('categories as c', 'c.id', '=', 'r.categories_id')
            ->leftJoin('root_categories as cp', 'cp.id', '=', 'c.root_categories_id')
            ->leftJoin('movieinfo as mi', function ($join): void {
                $join->on('mi.id', '=', 'r.movieinfo_id')
                    ->where('r.movieinfo_id', '>', 0);
            })
            ->leftJoin('videos as v', function ($join): void {
                $join->on('v.id', '=', 'r.videos_id')
                    ->where('r.videos_id', '>', 0);
            })
            ->leftJoin('tv_episodes as tve', function ($join): void {
                $join->on('tve.id', '=', 'r.tv_episodes_id')
                    ->where('r.tv_episodes_id', '>', 0);
            })
            ->leftJoin('release_nfos as rn', 'rn.releases_id', '=', 'r.id')
            ->leftJoin('video_data as vd', 'vd.releases_id', '=', 'r.id')
            ->leftJoinSub($mediaInfo, 'mdi', 'mdi.releases_id', '=', 'r.id')
            ->select([
                'r.id', 'r.guid', 'r.name', 'r.searchname', 'r.fromname', 'r.categories_id',
                'r.groups_id', 'r.size', 'r.postdate', 'r.adddate', 'r.totalpart', 'r.grabs',
                'r.comments', 'r.passwordstatus', 'r.nzbstatus', 'r.nfostatus', 'r.haspreview',
                'r.jpgstatus', 'r.videos_id', 'r.tv_episodes_id', 'r.movieinfo_id', 'r.imdbid',
                'r.anidbid', 'g.name as group_name', 'c.root_categories_id as parentid',
                'c.title as sub_category', 'tve.title as episode_title', 'tve.series',
                'tve.episode', 'tve.firstaired',
                'cp.title as parent_category', DB::raw("{$categoryName} AS category_name"),
                DB::raw("{$filename} AS filename"),
                DB::raw('COALESCE(mi.tmdbid, 0) AS tmdbid'),
                DB::raw('COALESCE(mi.traktid, 0) AS traktid'),
                DB::raw('COALESCE(v.tvdb, 0) AS tvdb'),
                DB::raw('COALESCE(v.tvmaze, 0) AS tvmaze'),
                DB::raw('COALESCE(v.tvrage, 0) AS tvrage'),
                DB::raw('COALESCE(v.trakt, 0) AS trakt'),
                DB::raw("COALESCE(v.imdb, '') AS imdb"),
                DB::raw('COALESCE(v.tmdb, 0) AS tmdb'),
                DB::raw('COALESCE(rn.releases_id, 0) AS nfoid'),
                DB::raw('COALESCE(vd.releases_id, 0) AS reid'),
                DB::raw("COALESCE(mdi.movie_name, '') AS media_movie_name"),
                DB::raw("COALESCE(mdi.file_name, '') AS media_file_name"),
                DB::raw("COALESCE(mdi.unique_id, '') AS media_unique_id"),
                DB::raw("COALESCE(vd.containerformat, '') AS media_container_format"),
                DB::raw("COALESCE(vd.videoformat, '') AS media_video_format"),
                DB::raw("COALESCE(vd.videocodec, '') AS media_video_codec"),
                DB::raw('COALESCE(vd.videowidth, 0) AS media_video_width'),
                DB::raw('COALESCE(vd.videoheight, 0) AS media_video_height'),
                DB::raw("{$audioFormat} AS media_audio_format"),
                DB::raw("{$audioChannels} AS media_audio_channels"),
                DB::raw("{$audioLanguage} AS media_audio_language"),
                DB::raw("{$subtitleLanguage} AS media_subtitle_language"),
                DB::raw('CASE WHEN mdi.releases_id IS NOT NULL OR vd.releases_id IS NOT NULL OR EXISTS (SELECT 1 FROM audio_data ad WHERE ad.releases_id = r.id) OR EXISTS (SELECT 1 FROM release_subtitles rs WHERE rs.releases_id = r.id) THEN 1 ELSE 0 END AS has_media_info'),
            ]);
    }

    private static function mediaInfoQuery(): Builder
    {
        return DB::table('media_infos as selected_media_info')
            ->select([
                'selected_media_info.releases_id',
                'selected_media_info.movie_name',
                'selected_media_info.file_name',
                'selected_media_info.unique_id',
            ])
            ->whereRaw(
                'selected_media_info.id = (SELECT MIN(candidate_media_info.id) FROM media_infos candidate_media_info WHERE candidate_media_info.releases_id = selected_media_info.releases_id)'
            );
    }

    /**
     * @return array<string, mixed>|null
     */
    public static function forId(int $releaseId): ?array
    {
        if ($releaseId <= 0) {
            return null;
        }

        $row = self::query()->where('r.id', $releaseId)->first();

        return $row === null ? null : ReleaseSearchIndexDocument::normalize((array) $row);
    }
}