<?php

namespace App\Http\Controllers;

use App\Models\Author;
use App\Models\Chapter;
use App\Models\Comic;
use App\Models\Image;
use App\Remote\CopyManga;
use App\Remote\ImageFetcher;
use Illuminate\Contracts\Routing\ResponseFactory;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Foundation\Application;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response as IlluminateHttpResponse;
use Illuminate\Support\Facades\Cache;
use Inertia\Inertia;
use Inertia\Response;

class ComicController extends Controller
{

    public function __construct(private readonly CopyManga $copyManga)
    {
    }

    public function favourites(Request $request)
    {
        $favourites = $request->user()->favourites()->with(['authors'])->orderBy('upstream_updated_at', 'desc')->get();

        return Inertia::render('Comic/Favourites', [
            'favourites' => $favourites,
        ]);
    }

    public function postFavourite(Request $request): JsonResponse
    {
        try {
            // Get pathname to comic_id
            $comic = Comic::where('pathword', $request->pathword)->firstOrFail();
        } catch (ModelNotFoundException $e) {
            // Fetch from remote
            $remoteComic = $this->copyManga->comic($request->pathword);

            $comic = new Comic;
            $comic->pathword = $remoteComic['comic']['path_word'];
            $comic->name = $remoteComic['comic']['name'];
            $comic->cover = $remoteComic['comic']['cover'];
            $comic->upstream_updated_at = $remoteComic['comic']['datetime_updated'];
            $comic->uuid = $remoteComic['comic']['uuid'];
            $comic->alias = explode(',', $remoteComic['comic']['alias']);
            $comic->description = $remoteComic['comic']['brief'];
            $comic->metadata = $remoteComic;
            $comic->save();
        }

        // Set favourite
        if ($request->user()->favourites()->where('comic_id', $comic->id)->exists()) {
            $request->user()->favourites()->detach($comic->id);
        } else {
            $request->user()->favourites()->attach($comic->id);
        }

        return response()->json($request->user()->favourites()->get(['pathword'])->pluck('pathword'));
    }

    public function image(Request $request, string $url): ResponseFactory|Application|IlluminateHttpResponse
    {
        // TODO: Ref check and make it require auth
        $fetcher = new ImageFetcher(base64_decode($url));

        return response($fetcher->fetch())->withHeaders([
            'Content-Type' => $fetcher->getMimeType()->value,
            'Cache-Control' => 'max-age=604800',
        ]);
    }

	public function index(Request $request): Response
	{
        $params = [];
        if ($request->has('tag')) {
            $params['theme'] = $request->get('tag');
        }

        $comics = $this->copyManga->comics(30, $request->header('offset', 0), $request->get('top', 'all'), $params);

        // Prep the array for upsert
        $comicsUpsertArray = [];
        $authorsUpsertArray = [];

        foreach ($comics['list'] as $comic) {
            $comicsUpsertArray[] = [
                'pathword' => $comic['path_word'],
                'uuid' => '',
                'name' => $comic['name'],
                'alias' => '{}',
                'description' => '',
                'cover' => $comic['cover'],
                'upstream_updated_at' => $comic['datetime_updated'],
            ];

            foreach ($comic['author'] as $author) {
                $authorsUpsertArray[] = [
                    'name' => $author['name']
                ];
            }
        }

        // Do an upsert for comics
        Comic::upsert($comicsUpsertArray, uniqueBy: 'pathword', update: ['upstream_updated_at']);
        Author::upsert($authorsUpsertArray, uniqueBy: 'name');

        // Had to do a second pass to insert the relationships
        foreach ($comics['list'] as $comic) {
            // Get the comic id
            $comicObj = Comic::where('pathword', $comic['path_word'])->first();

            foreach ($comic['author'] as $author) {
                $authorObj = Author::where('name', $author['name'])->first();
                $comicObj->authors()->sync($authorObj);
            }
        }

        return Inertia::render('Comic/Index', [
            'comics' => $comics,
            'offset' => $request->header('offset', 0)
        ]);
	}

    public function chapters(Request $request, string $pathword = ''): Response
    {
        $comic = $this->copyManga->comic($pathword);
        $chapters = $this->copyManga->chapters($pathword, 200, 0, [], $request->get('group', 'default'));

        // Get the comic object and fill other parameters
        $comicObject = Comic::where('pathword', $pathword)->first();
        $comicObject->uuid = $comic['comic']['uuid'];
        $comicObject->alias = explode(',', $comic['comic']['alias']);
        $comicObject->description = $comic['comic']['brief'];
        $comicObject->metadata = $comic;
        $comicObject->save();

        // Get the authors and update the pathword
        foreach ($comic['comic']['author'] as $author) {
            $authorObj = Author::where('name', $author['name'])->whereNull('pathword')->first();

            if ($authorObj) {
                // Do nothing if pathword already exist
                $authorObj->pathword = $author['path_word'];
                $authorObj->save();
            }
        }

        // Do the Chapters
        // Prep the array for upsert
        $arrayForUpsert = [];
        foreach ($chapters['list'] as $chapter) {
            $arrayForUpsert[] = [
                'comic_id' => $comicObject->id,
                'chapter_uuid' => $chapter['uuid'],
                'name' => $chapter['name'],
                'order' => $chapter['index'],
                'upstream_created_at' => $chapter['datetime_created'],
                'metadata' => json_encode($chapter),
            ];
        }

        // Do an upsert
        Chapter::upsert($arrayForUpsert, uniqueBy: 'chapter_uuid');

        // Get history
        $histories = $request->user()->readingHistories()->where('reading_histories.comic_id', $comicObject->id)
            ->distinct()->select('chapter_uuid')->get()->pluck('chapter_uuid');

        return Inertia::render('Comic/Chapters', [
            'comic' => $comic,
            'chapters' => $chapters,
            'histories' => $histories
        ]);
    }

    public function read(Request $request, string $pathword = '', string $uuid = ''): Response
    {
        $comic = $this->copyManga->comic($pathword);
        $chapter = $this->copyManga->chapter($pathword, $uuid);

        // Get the authors and update the pathword
        foreach ($comic['comic']['author'] as $author) {
            $authorObj = Author::where('name', $author['name'])->whereNull('pathword')->first();

            if ($authorObj) {
                // Do nothing if pathword already exist
                $authorObj->pathword = $author['path_word'];
                $authorObj->save();
            }
        }

        $chapterObj = Chapter::where('chapter_uuid', $chapter['chapter']['uuid'])->first();
        $comicObj = Comic::where('pathword', $pathword)->first();

        $arrayForUpsert = [];

        foreach ($chapter['sorted'] as $k => $image) {
            $metadata = $chapter;
            unset($metadata['sorted']);
            unset($metadata['chapter']['contents'], $metadata['chapter']['words']);

            $arrayForUpsert[] = [
                'comic_id' => $comicObj->id,
                'chapter_id' => $chapterObj->id,
                'order' => $k,
                'url' => $image['url'],
                'metadata' => json_encode($metadata),
            ];
        }

        // Do an upsert
        Image::upsert($arrayForUpsert, uniqueBy: 'url');

        // Update history
        $request->user()->readingHistories()->attach($chapterObj->id, ['comic_id' => $comicObj->id]);

        return Inertia::render('Comic/Read', [
            'comic' => $comic,
            'chapter' => $chapter,
        ]);
    }

    public function histories(Request $request): Response
    {
        // Get history
        $histories = $request->user()->readingHistories()->with(['comic:id,name,pathword'])->orderByDesc('reading_histories.created_at')
            ->select(['reading_histories.id as hid', 'reading_histories.created_at', 'chapters.comic_id', 'chapters.name'])->paginate(50)->toArray();

        return Inertia::render('Comic/Histories', [
            'histories' => $histories
        ]);
    }

    public function destroyHistories(Request $request): RedirectResponse
    {
        $histories = $request->user()->readingHistories()->whereIn('reading_histories.id', $request->get('ids'))->delete();
        return redirect()->route('comics.histories');
    }

    public function tags()
    {
        // TODO
        $tags = $this->copyManga->tags();
        Cache::forever('tags', $tags);

        return response()->json($tags);
    }
}