<?php
/**
 * ImportController.php
 * Copyright (C) 2016 thegrumpydictator@gmail.com
 *
 * This software may be modified and distributed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International License.
 *
 * See the LICENSE file for details.
 */
declare(strict_types=1);

namespace FireflyIII\Http\Controllers;

use FireflyIII\Exceptions\FireflyException;
use FireflyIII\Http\Requests\ImportUploadRequest;
use FireflyIII\Import\Configurator\ConfiguratorInterface;
use FireflyIII\Import\ImportProcedureInterface;
use FireflyIII\Models\ImportJob;
use FireflyIII\Repositories\ImportJob\ImportJobRepositoryInterface;
use FireflyIII\Repositories\Tag\TagRepositoryInterface;
use FireflyIII\Repositories\User\UserRepositoryInterface;
use Illuminate\Http\Request;
use Illuminate\Http\Response as LaravelResponse;
use Log;
use Response;
use View;

/**
 * Class ImportController
 *
 * @package FireflyIII\Http\Controllers
 */
class ImportController extends Controller
{
    /**
     *
     */
    public function __construct()
    {
        parent::__construct();

        $this->middleware(
            function ($request, $next) {
                View::share('mainTitleIcon', 'fa-archive');
                View::share('title', trans('firefly.import_data_full'));

                return $next($request);
            }
        );
    }
    //
    //    /**
    //     * This is the last step before the import starts.
    //     *
    //     * @param ImportJob $job
    //     *
    //     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector|View
    //     */
    //    public function complete(ImportJob $job)
    //    {
    //        Log::debug('Now in complete()', ['job' => $job->key]);
    //        if (!$this->jobInCorrectStep($job, 'complete')) {
    //            return $this->redirectToCorrectStep($job);
    //        }
    //        $subTitle     = trans('firefly.import_complete');
    //        $subTitleIcon = 'fa-star';
    //
    //        return view('import.complete', compact('job', 'subTitle', 'subTitleIcon'));
    //    }

    /**
     * This is step 3. This repeats until the job is configured.
     *
     * @param ImportJob $job
     *
     * @return View
     * @throws FireflyException
     */
    public function configure(ImportJob $job)
    {
        // create configuration class:
        $configurator = $this->makeConfigurator($job);

        // is the job already configured?
        if ($configurator->isJobConfigured()) {
            return redirect(route('import.status', [$job->key]));
        }
        $view         = $configurator->getNextView();
        $data         = $configurator->getNextData();
        $subTitle     = trans('firefly.configure_import');
        $subTitleIcon = 'fa-wrench';

        return view($view, compact('data', 'job', 'subTitle', 'subTitleIcon'));
    }

    /**
     * Generate a JSON file of the job's config and send it to the user.
     *
     * @param ImportJob $job
     *
     * @return mixed
     */
    public function download(ImportJob $job)
    {
        Log::debug('Now in download()', ['job' => $job->key]);
        $config                            = $job->configuration;
        $config['column-roles-complete']   = false;
        $config['column-mapping-complete'] = false;
        $config['delimiter']               = $config['delimiter'] === "\t" ? 'tab' : $config['delimiter'];
        $result                            = json_encode($config, JSON_PRETTY_PRINT);
        $name                              = sprintf('"%s"', addcslashes('import-configuration-' . date('Y-m-d') . '.json', '"\\'));

        /** @var LaravelResponse $response */
        $response = response($result, 200);
        $response->header('Content-disposition', 'attachment; filename=' . $name)
                 ->header('Content-Type', 'application/json')
                 ->header('Content-Description', 'File Transfer')
                 ->header('Connection', 'Keep-Alive')
                 ->header('Expires', '0')
                 ->header('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
                 ->header('Pragma', 'public')
                 ->header('Content-Length', strlen($result));

        return $response;


    }

    //    /**
    //     * @param ImportJob $job
    //     *
    //     * @return View
    //     */
    //    public function finished(ImportJob $job)
    //    {
    //        if (!$this->jobInCorrectStep($job, 'finished')) {
    //            return $this->redirectToCorrectStep($job);
    //        }
    //
    //        // if there is a tag (there might not be), we can link to it:
    //        $tagId = $job->extended_status['importTag'] ?? 0;
    //
    //        $subTitle     = trans('firefly.import_finished');
    //        $subTitleIcon = 'fa-star';
    //
    //        return view('import.finished', compact('job', 'subTitle', 'subTitleIcon', 'tagId'));
    //    }

    /**
     * This is step 1. Upload a file.
     *
     * @return View
     */
    public function index()
    {
        $subTitle          = trans('firefly.import_data_index');
        $subTitleIcon      = 'fa-home';
        $importFileTypes   = [];
        $defaultImportType = config('firefly.default_import_format');

        foreach (array_keys(config('firefly.import_formats')) as $type) {
            $importFileTypes[$type] = trans('firefly.import_file_type_' . $type);
        }

        return view('import.index', compact('subTitle', 'subTitleIcon', 'importFileTypes', 'defaultImportType'));
    }

    /**
     * This is step 2. It creates an Import Job. Stores the import.
     *
     * @param ImportUploadRequest          $request
     * @param ImportJobRepositoryInterface $repository
     * @param UserRepositoryInterface      $userRepository
     *
     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
     */
    public function initialize(ImportUploadRequest $request, ImportJobRepositoryInterface $repository, UserRepositoryInterface $userRepository)
    {
        Log::debug('Now in initialize()');

        // create import job:
        $type = $request->get('import_file_type');
        $job  = $repository->create($type);
        Log::debug('Created new job', ['key' => $job->key, 'id' => $job->id]);

        // process file:
        $repository->processFile($job, $request->files->get('import_file'));

        // process config, if present:
        if ($request->files->has('configuration_file')) {
            $repository->processConfiguration($job, $request->files->get('configuration_file'));
        }

        return redirect(route('import.configure', [$job->key]));
    }

    /**
     * @param ImportJob $job
     *
     * @return \Illuminate\Http\JsonResponse
     */
    public function json(ImportJob $job)
    {
        $result     = [
            'started'      => false,
            'finished'     => false,
            'running'      => false,
            'errors'       => $job->extended_status['errors'],
            'percentage'   => 0,
            'steps'        => $job->extended_status['total_steps'],
            'stepsDone'    => $job->extended_status['steps_done'],
            'statusText'   => trans('firefly.import_status_' . $job->status),
            'status'       => $job->status,
            'finishedText' => '',
        ];
        $percentage = 0;
        if ($job->extended_status['total_steps'] !== 0) {
            $percentage = round(($job->extended_status['steps_done'] / $job->extended_status['total_steps']) * 100, 0);
        }
        if ($job->status === 'complete') {
            $tagId = $job->extended_status['importTag'];
            /** @var TagRepositoryInterface $repository */
            $repository             = app(TagRepositoryInterface::class);
            $tag                    = $repository->find($tagId);
            $result['finished']     = true;
            $result['finishedText'] = trans('firefly.import_finished_link', ['link' => route('tags.show', [$tag->id]), 'tag' => $tag->tag]);
        }

        if ($job->status === 'running') {
            $result['started']    = true;
            $result['running']    = true;
            $result['percentage'] = $percentage;
        }

        return Response::json($result);
    }

    /**
     * Step 4. Save the configuration.
     *
     * @param Request                      $request
     * @param ImportJobRepositoryInterface $repository
     * @param ImportJob                    $job
     *
     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
     */
    public function postConfigure(Request $request, ImportJobRepositoryInterface $repository, ImportJob $job)
    {
        Log::debug('Now in postConfigure()', ['job' => $job->key]);
        $configurator = $this->makeConfigurator($job);

        // is the job already configured?
        if ($configurator->isJobConfigured()) {
            return redirect(route('import.status', [$job->key]));
        }
        $data = $request->all();
        $configurator->configureJob($data);

        // return to configure
        return redirect(route('import.configure', [$job->key]));
    }

    //    /**
    //     * This step 6. Depending on the importer, this will process the
    //     * settings given and store them.
    //     *
    //     * @param Request   $request
    //     * @param ImportJob $job
    //     *
    //     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
    //     * @throws FireflyException
    //     */
    //    public function postSettings(Request $request, ImportJob $job)
    //    {
    //        Log::debug('Now in postSettings()', ['job' => $job->key]);
    //        if (!$this->jobInCorrectStep($job, 'store-settings')) {
    //            return $this->redirectToCorrectStep($job);
    //        }
    //        $importer = $this->makeImporter($job);
    //        $importer->storeSettings($request);
    //
    //        // return redirect to settings (for more settings perhaps)
    //        return redirect(route('import.settings', [$job->key]));
    //    }

    //    /**
    //     * Step 5. Depending on the importer, this will show the user settings to
    //     * fill in.
    //     *
    //     * @param ImportJobRepositoryInterface $repository
    //     * @param ImportJob                    $job
    //     *
    //     * @return View
    //     */
    //    public function settings(ImportJobRepositoryInterface $repository, ImportJob $job)
    //    {
    //        Log::debug('Now in settings()', ['job' => $job->key]);
    //        if (!$this->jobInCorrectStep($job, 'settings')) {
    //            return $this->redirectToCorrectStep($job);
    //        }
    //        Log::debug('Continue in settings()');
    //        $importer     = $this->makeImporter($job);
    //        $subTitle     = trans('firefly.settings_for_import');
    //        $subTitleIcon = 'fa-wrench';
    //
    //        // now show settings screen to user.
    //        if ($importer->requireUserSettings()) {
    //            Log::debug('Job requires user config.');
    //            $data = $importer->getDataForSettings();
    //            $view = $importer->getViewForSettings();
    //
    //            return view($view, compact('data', 'job', 'subTitle', 'subTitleIcon'));
    //        }
    //        Log::debug('Job does NOT require user config.');
    //
    //        $repository->updateStatus($job, 'settings_complete');
    //
    //        // if no more settings, save job and continue to process thing.
    //        return redirect(route('import.complete', [$job->key]));
    //
    //        // ask the importer for the requested action.
    //        // for example pick columns or map data.
    //        // depends of course on the data in the job.
    //    }

    /**
     * @param ImportProcedureInterface $importProcedure
     * @param ImportJob                $job
     */
    public function start(ImportProcedureInterface $importProcedure, ImportJob $job)
    {
        die('TODO here.');
        set_time_limit(0);
        if ($job->status == 'settings_complete') {
            $importProcedure->runImport($job);
        }
    }

    /**
     * This is the last step before the import starts.
     *
     * @param ImportJob $job
     *
     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector|View
     */
    public function status(ImportJob $job)
    {
        $subTitle     = trans('firefly.import_status');
        $subTitleIcon = 'fa-star';

        return view('import.status', compact('job', 'subTitle', 'subTitleIcon'));
    }

    //    /**
    //     * @param ImportJob $job
    //     * @param string    $method
    //     *
    //     * @return bool
    //     */
    //    private function jobInCorrectStep(ImportJob $job, string $method): bool
    //    {
    //        Log::debug('Now in jobInCorrectStep()', ['job' => $job->key, 'method' => $method]);
    //        switch ($method) {
    //            case 'configure':
    //            case 'process':
    //                return $job->status === 'import_status_never_started';
    //            case 'settings':
    //            case 'store-settings':
    //                Log::debug(sprintf('Job %d with key %s has status %s', $job->id, $job->key, $job->status));
    //
    //                return $job->status === 'import_configuration_saved';
    //            case 'finished':
    //                return $job->status === 'import_complete';
    //            case 'complete':
    //                return $job->status === 'settings_complete';
    //            case 'status':
    //                return ($job->status === 'settings_complete') || ($job->status === 'import_running');
    //        }
    //
    //        return false; // @codeCoverageIgnore
    //
    //    }

    /**
     * @param ImportJob $job
     *
     * @return ConfiguratorInterface
     * @throws FireflyException
     */
    private function makeConfigurator(ImportJob $job): ConfiguratorInterface
    {
        $type      = $job->file_type;
        $key       = sprintf('firefly.import_configurators.%s', $type);
        $className = config($key);
        if (is_null($className)) {
            throw new FireflyException('Cannot find configurator class for this job.');
        }
        $configurator = new $className($job);

        return $configurator;
    }

    //    /**
    //     * @param ImportJob $job
    //     *
    //     * @return SetupInterface
    //     * @throws FireflyException
    //     */
    //    private function makeImporter(ImportJob $job): SetupInterface
    //    {
    //        // create proper importer (depends on job)
    //        $type = strtolower($job->file_type);
    //
    //        // validate type:
    //        $validTypes = array_keys(config('firefly.import_formats'));
    //
    //
    //        if (in_array($type, $validTypes)) {
    //            /** @var SetupInterface $importer */
    //            $importer = app('FireflyIII\Import\Setup\\' . ucfirst($type) . 'Setup');
    //            $importer->setJob($job);
    //
    //            return $importer;
    //        }
    //        throw new FireflyException(sprintf('"%s" is not a valid file type', $type)); // @codeCoverageIgnore
    //
    //    }

    //    /**
    //     * @param ImportJob $job
    //     *
    //     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
    //     * @throws FireflyException
    //     */
    //    private function redirectToCorrectStep(ImportJob $job)
    //    {
    //        Log::debug('Now in redirectToCorrectStep()', ['job' => $job->key]);
    //        switch ($job->status) {
    //            case 'import_status_never_started':
    //                Log::debug('Will redirect to configure()');
    //
    //                return redirect(route('import.configure', [$job->key]));
    //            case 'import_configuration_saved':
    //                Log::debug('Will redirect to settings()');
    //
    //                return redirect(route('import.settings', [$job->key]));
    //            case 'settings_complete':
    //                Log::debug('Will redirect to complete()');
    //
    //                return redirect(route('import.complete', [$job->key]));
    //            case 'import_complete':
    //                Log::debug('Will redirect to finished()');
    //
    //                return redirect(route('import.finished', [$job->key]));
    //        }
    //
    //        throw new FireflyException('Cannot redirect for job state ' . $job->status); // @codeCoverageIgnore
    //
    //    }
}