<?php

namespace App\Http\Controllers\Bo;

use App\Http\Controllers\Controller;
use App\Http\Requests\Bo\Documents\StoreDocumentRequest;
use App\Http\Requests\Bo\Documents\UpdateDocumentRequest;
use App\Models\Directory;
use App\Models\Document;
use App\Models\Tag;
use App\Traits\Controllers\ChangesModelOrder;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Http\Request;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;
use Pion\Laravel\ChunkUpload\Exceptions\UploadMissingFileException;
use Pion\Laravel\ChunkUpload\Handler\HandlerFactory;
use Pion\Laravel\ChunkUpload\Receiver\FileReceiver;

class DocumentController extends Controller
{
    use ChangesModelOrder;

    /**
     * Display a listing of the resource.
     *
     * @param \Illuminate\Http\Request $request
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        /** @var \Illuminate\Database\Eloquent\Builder $documents */
        $documents = Document::query();
        $tags      = Tag::get();

        /** @var string $search Search field */
        if ($request->search) {
            $this->searchQuery(
                $documents,
                $request->search,
                null,
                'title',
            );
        }
        $searchFields = trans('Titre');

        /** Search by tags */
        $documents->when($request->tag, function ($query) use ($request) {
            $query->whereHas('tags', function (Builder $query) use ($request) {
                $query->where('id', $request->tag);
            });
        });

        /** Sort columns with a query */
        $this->sortQuery($documents);

        /** @var integer $pagination Items per page */
        if ($request->pagination) {
            // FIXME: Add pagination validation.
            Cache::forever('pagination', intval($request->pagination));
        }
        $documents = $documents->paginate(intval(Cache::get('pagination')) ?? config('pagination.default'));

        return view('bo.pages.documents.index', [
            'documents' => $documents,
            'searchFields' => $searchFields,
            'searchTag' => $request->tag,
            'tags' => $tags
        ]);
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        $documents   = Document::where('lang', \App\Enums\Documents\LangEnum::fr())->get();
        $directories = Directory::getChildrenDirectories();
        $tags        = Tag::get();

        return view('bo.pages.documents.create', compact('documents', 'directories', 'tags'));
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \App\Http\Requests\Bo\Documents\StoreDocumentRequest $request
     * @return \Illuminate\Http\Response
     */
    public function store(StoreDocumentRequest $request)
    {
        return DB::transaction(function () use ($request) {
            $document = new Document();
            $document->fill($request->validated());
            if ($document->saveOrFail()) {
                $document->tags()->sync(collect($request->tags)->pluck('id'));
                return redirect()
                    ->route('bo.documents.edit', $document)
                    ->with('success', trans(
                        ':model a été créé',
                        ['model' => Str::singular(trans('models.classes.documents'))]
                    ));
            }
            return redirect()
                ->back()
                ->with('error', trans(
                    ':model n\'a pas été créé',
                    ['model' => Str::singular(trans('models.classes.documents'))]
                ));
        });
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param \App\Models\Document $document
     * @return \Illuminate\Http\Response
     */
    public function edit(Document $document)
    {
        $documents   = Document::where('lang', \App\Enums\Documents\LangEnum::fr())->get();
        $directories = Directory::getChildrenDirectories();
        $tags        = Tag::get();

        return view('bo.pages.documents.edit', [
            'documents' => $documents,
            'documentModel' => $document,
            'directories' => $directories,
            'tags' => $tags
        ]);
    }

    /**
     * Update the specified resource in storage.
     *
     * @param \App\Http\Requests\Bo\Document\UpdateDocumentRequest $request
     * @param \App\Models\Document                                 $document
     * @return \Illuminate\Http\Response
     */
    public function update(UpdateDocumentRequest $request, Document $document)
    {
        return DB::transaction(function () use ($request, $document) {
            $document->fill($request->validated());
            $document->tags()->sync(collect($request->tags)->pluck('id'));
            if ($document->saveOrFail()) {
                return redirect()
                    ->route('bo.documents.edit', $document)
                    ->with('success', trans(
                        ':model a été mis à jour',
                        ['model' => Str::singular(trans('models.classes.documents'))]
                    ));
            }
            return redirect()
                ->back()
                ->with('error', trans(
                    ':model n\'a pas été mis à jour',
                    ['model' => Str::singular(trans('models.classes.documents'))]
                ));
        });
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  \App\Models\Document $document
     * @return \Illuminate\Http\Response
     */
    public function destroy(Document $document)
    {
        $document->tags()->sync([]);
        foreach ($document->children as $documentChild) {
            Document::removeDocument($documentChild);
            $documentChild->deleteOrFail();
        }
        if ($document->deleteOrFail()) {
            return redirect()
                ->route('bo.documents.index')
                ->with('warning', trans(
                    ':model a bien été supprimé',
                    ['model' => Str::singular(trans('models.classes.documents'))]
                ));
        }
        return redirect()
            ->back()
            ->with('error', trans(
                ':model n\'a pas été supprimé',
                ['model' => Str::singular(trans('models.classes.documents'))]
            ));
    }

    /**
     * Download the document
     *
     * @param mixed $uuid
     * @return \Symfony\Component\HttpFoundation\BinaryFileResponse
     */
    public function download(mixed $uuid)
    {
        $doc        = Document::where('uuid', $uuid)->firstOrFail();
        $pathToFile = public_path() . Storage::url('docs/' . $doc->uuid . '.' . $doc->type);
        return response()->download($pathToFile, $doc->path);
    }

    /**
     * @param \Illuminate\Http\Request $request
     * @return \Illuminate\Http\JsonResponse
     * @throws \Pion\Laravel\ChunkUpload\Exceptions\UploadMissingFileException Bla.
     */
    public function upload(Request $request)
    {
        if (isset($request->uuid)) {
            $uuid = $request->uuid;
        } else {
            $uuid = false;
        }
        // Create the file receiver.
        $receiver = new FileReceiver("file", $request, HandlerFactory::classFromRequest($request));
        // Check if the upload is success, throw exception or return response you need.
        if ($receiver->isUploaded() === false) {
            throw new UploadMissingFileException();
        }
        // Receive the file.
        $save = $receiver->receive();
        // Check if the upload has finished (in chunk mode it will send smaller files).
        if ($save->isFinished()) {
            // Save the file and return any response you need, current example uses `move` function.
            // If you are not using move, you need to manually delete the file: unlink($save->getFile()->getPathname()).
            return $this->saveFile($save->getFile(), $uuid);
        }
        // We are in chunk mode, lets send the current progress.
        /** @var AbstractHandler $handler */
        $handler = $save->handler();
        return response()->json([
            "done" => $handler->getPercentageDone(),
            'status' => true
        ]);
    }

    /**
     * @param \Illuminate\Http\UploadedFile $file
     * @param mixed                         $uuid
     * @return \Illuminate\Http\JsonResponse
     * @throws \Illuminate\Contracts\Container\BindingResolutionException Bla.
     */
    protected function saveFile(UploadedFile $file, mixed $uuid)
    {
        if ($uuid === false) {
            $uuid = sprintf(
                '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
                mt_rand(0, 0xffff),
                mt_rand(0, 0xffff),
                mt_rand(0, 0xffff),
                mt_rand(0, 0x0fff) | 0x4000,
                mt_rand(0, 0x3fff) | 0x8000,
                mt_rand(0, 0xffff),
                mt_rand(0, 0xffff),
                mt_rand(0, 0xffff)
            );
        }
        $finalPath = storage_path('app/public/docs/');
        // Move the file name.
        $file->move($finalPath, $uuid . '.' . $file->getClientOriginalExtension());
        return response()->json([
            'uid' => $uuid,
        ]);
    }
}