<?php

namespace App\Http\Controllers\Publish;

use App\Http\Controllers\Controller;
use App\Interfaces\DoiInterface;
use App\Models\Dataset;
use App\Models\DatasetIdentifier;
use Illuminate\Http\Request;
use App\Models\Oai\OaiModelError;
use App\Exceptions\OaiModelException;
use Illuminate\Support\Facades\View;
use App\Exceptions\GeneralException;

class DoiController extends Controller
{
    protected $doiService;
    protected $LaudatioUtils;

    /**
     * Holds xml representation of document information to be processed.
     *
     * @var \DomDocument  Defaults to null.
     */
    protected $xml = null;
    /**
     * Holds the stylesheet for the transformation.
     *
     * @var \DomDocument  Defaults to null.
     */
    protected $xslt = null;

    /**
     * Holds the xslt processor.
     *
     * @var \XSLTProcessor  Defaults to null.
     */
    protected $proc = null;

    /**
     * DOIController constructor.
     * @param DoiInterface $DOIService
     */
    public function __construct(DoiInterface $DoiClient)
    {
        $this->doiClient = $DoiClient;

        $this->xml = new \DomDocument();
        $this->proc = new \XSLTProcessor();
    }

    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Contracts\View\View
     */
    // public function index()
    // {
    //     //
    // }
    public function index(): \Illuminate\Contracts\View\View
    {
        $datasets = Dataset::query()
            ->has('identifier')
            ->orderBy('server_date_modified', 'desc')
            ->get();
        return View::make('workflow.doi.index', [
            'datasets' => $datasets,
        ]);
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create(Request $request)
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        $dataId = $request->input('publish_id');

        // Setup stylesheet
        $this->loadStyleSheet(public_path() . '/prefixes/doi_datacite.xslt');

        // set timestamp
        $date = new \DateTime();
        $unixTimestamp = $date->getTimestamp();
        $this->proc->setParameter('', 'unixTimestamp', $unixTimestamp);

        $prefix = config('tethys.datacite_prefix');
        $this->proc->setParameter('', 'prefix', $prefix);

        $repIdentifier = "tethys";
        $this->proc->setParameter('', 'repIdentifier', $repIdentifier);

        $this->xml->appendChild($this->xml->createElement('Datasets'));
        $dataset = Dataset::where('publish_id', '=', $dataId)->firstOrFail();
        if (is_null($dataset)) {
            throw new OaiModelException('Dataset is not available for registering DOI!', OaiModelError::NORECORDSMATCH);
        }
        $dataset->fetchValues();
        $xmlModel = new \App\Library\Xml\XmlModel();
        $xmlModel->setModel($dataset);
        $xmlModel->excludeEmptyFields();
        $cache = ($dataset->xmlCache) ? $dataset->xmlCache : new \App\Models\XmlCache();
        $xmlModel->setXmlCache($cache);
        $domNode = $xmlModel->getDomDocument()->getElementsByTagName('Rdr_Dataset')->item(0);
        $node = $this->xml->importNode($domNode, true);
        $this->addSpecInformation($node, 'data-type:' . $dataset->type);

        $this->xml->documentElement->appendChild($node);
        $xmlMeta = $this->proc->transformToXML($this->xml);
        // Log::alert($xmlMeta);
        //create doiValue and correspunfing landingpage of tehtys
        $doiValue = $prefix . '/tethys.' . $dataset->publish_id;
        $appUrl = config('app.url');
        $landingPageUrl = $appUrl . "/dataset/" . $dataset->publish_id;
        $response = $this->doiClient->registerDoi($doiValue, $xmlMeta, $landingPageUrl);
        // if operation successful, store dataste identifier
        if ($response->getStatusCode() == 201) {
            $doi = new DatasetIdentifier();
            $doi['value'] = $doiValue;
            $doi['dataset_id'] = $dataset->id;
            $doi['type'] = "doi";
            $doi['status'] = "registered";
            $doi->save();
        }
    }

    /**
     * Display the specified resource.
     *
     * @param  \App\Models\DatasetIdentifier  $doi
     * @return \Illuminate\Http\Response
     */
    public function show(DatasetIdentifier $doi)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  \App\Models\DatasetIdentifier  $doi
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        $dataset = Dataset::query()
        ->with([
            'titles',
            'persons' => function ($query) {
                $query->wherePivot('role', 'author');
            },
        ])->findOrFail($id);

        return View::make('workflow.doi.edit', [
        'dataset' => $dataset,
        ]);
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \App\Models\DatasetIdentifier  $doi
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $publish_id)
    {
        $dataId = $publish_id; //$request->input('publish_id');
        // Setup stylesheet
        $this->loadStyleSheet(public_path() . '/prefixes/doi_datacite.xslt');

        // set timestamp
        $date = new \DateTime();
        $unixTimestamp = $date->getTimestamp();
        $this->proc->setParameter('', 'unixTimestamp', $unixTimestamp);

        $prefix = "";
        $base_domain = "";
        $datacite_environment = config('tethys.datacite_environment');
        if ($datacite_environment == "debug") {
            $prefix =  config('tethys.datacite_test_prefix');
            $base_domain = config('tethys.test_base_domain');
        } elseif ($datacite_environment == "production") {
            $prefix = config('tethys.datacite_prefix');
            $base_domain = config('tethys.base_domain');
        }
        // $prefix = config('tethys.datacite_prefix');
        $this->proc->setParameter('', 'prefix', $prefix);

        $repIdentifier = "tethys";
        $this->proc->setParameter('', 'repIdentifier', $repIdentifier);

        $this->xml->appendChild($this->xml->createElement('Datasets'));
        $dataset = Dataset::where('publish_id', '=', $dataId)->firstOrFail();
        if (is_null($dataset)) {
            throw new OaiModelException('Dataset is not available for registering DOI!', OaiModelError::NORECORDSMATCH);
        }
        $dataset->fetchValues();
        $xmlModel = new \App\Library\Xml\XmlModel();
        $xmlModel->setModel($dataset);
        $xmlModel->excludeEmptyFields();
        $cache = ($dataset->xmlCache) ? $dataset->xmlCache : new \App\Models\XmlCache();
        $xmlModel->setXmlCache($cache);
        $domNode = $xmlModel->getDomDocument()->getElementsByTagName('Rdr_Dataset')->item(0);
        $node = $this->xml->importNode($domNode, true);
        $this->addSpecInformation($node, 'data-type:' . $dataset->type);

        $this->xml->documentElement->appendChild($node);
        $newXmlMeta = $this->proc->transformToXML($this->xml);
        // Log::alert($xmlMeta);
        //create doiValue and correspunfing landingpage of tehtys
        $doiValue = $prefix . '/tethys.' . $dataset->publish_id;
       
        $response = $this->doiClient->updateMetadataForDoi($doiValue, $newXmlMeta);
        // if operation successful, store dataste identifier
        if ($response->getStatusCode() == 201) {
            $doi = $dataset->identifier;
            // $doi['value'] = $doiValue;
            // $doi['type'] = "doi";
            // $doi['status'] = "findable";
            // $doi->save();
            $doi->touch();
            return redirect()
                    ->route('publish.workflow.doi.index')
                    ->with('flash_message', 'You have successfully updated a DOI for the dataset!');

            // if ($doi->save()) {
            //     // update server_date_modified for triggering nex xml cache (doi interface)
            //     $time = new \Illuminate\Support\Carbon();
            //     $dataset->server_date_modified = $time;
            //     $dataset->save();
            //     return redirect()
            //         ->route('publish.workflow.editor.index')
            //         ->with('flash_message', 'You have successfully created a DOI for the dataset!');
            // }
        } else {
            $message = 'unexpected DataCite MDS response code ' . $response->getStatusCode();
            // $this->log($message, 'err');
            throw new GeneralException($message);
        }
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  \App\Models\DatasetIdentifier  $doi
     * @return \Illuminate\Http\Response
     */
    public function destroy(DatasetIdentifier $doi)
    {
        //
    }


    /**
     * Load an xslt stylesheet.
     *
     * @return void
     */
    private function loadStyleSheet($stylesheet)
    {
        $this->xslt = new \DomDocument;
        $this->xslt->load($stylesheet);
        $this->proc->importStyleSheet($this->xslt);
        if (isset($_SERVER['HTTP_HOST'])) {
            $this->proc->setParameter('', 'host', $_SERVER['HTTP_HOST']);
        }
        //$this->proc->setParameter('', 'server', $this->getRequest()->getBaseUrl());
    }

    private function addSpecInformation(\DOMNode $document, $information)
    {
        $setSpecAttribute = $this->xml->createAttribute('Value');
        $setSpecAttributeValue = $this->xml->createTextNode($information);
        $setSpecAttribute->appendChild($setSpecAttributeValue);

        $setSpecElement = $this->xml->createElement('SetSpec');
        //$setSpecElement =new \DOMElement("SetSpec");
        $setSpecElement->appendChild($setSpecAttribute);
        $document->appendChild($setSpecElement);
    }
}