<?php
namespace App\Http\Controllers\Admin;

use App\Enumerations\ContentStatuses;
use App\Enumerations\ModulesHandlerToId;
use App\Models\Content;
use App\Models\ContentHistory;
use App\Models\Template;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Str;
use Modules\StaticPages\Events\DeleteStaticPage;
use Modules\StaticPages\Events\EditStaticPage as EditStaticPageEvent;
use Modules\StaticPages\Events\MakeDraftFromStaticPage;
use Modules\StaticPages\Events\PublishStaticPage;
use Modules\StaticPages\Http\Requests\EditStaticPageRequest;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class EditContent extends Controller
{
    /**
     * @var ContentHistory
     */
    private $history;

    public function __construct(ContentHistory $history)
    {
        $this->history = $history;
    }

    /**
     * Display form for editing static page
     *
     * @param $id
     *
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function getEdit($id)
    {
        // select all content statuses
        $statuses = ContentStatuses::getWithTranslations();

        // try to find requested page
        $page = Content::where('module_handler', config('staticpages.handler'))
                       ->findOrFail($id);

        $allModules = ModulesHandlerToId::getWithTranslations();
        $moduleId = $allModules[config('staticpages.handler')];
        $templates = Template::where('module_id', $moduleId)
                             ->select(['template_name', 'name', 'description'])
                             ->get();

        $history = $this->history->getStructuredHistoryOf($page);

        // render view
        return view('admin.content.edit', [
            'contentStatuses' => $statuses,
            'page'            => $page,
            'templates'       => $templates,
            'formSectionNames' => call_user_func([$page->module_handler, 'getExtendedFormSections']),
            'formSections'     => call_user_func([$page->module_handler, 'getExtendedFormInputsCreate']),
            'historySize'     => count($history['changesets'])
        ]);
    }

    /**
     * Edit static page and save changes into history.
     *
     * @param EditStaticPageRequest $request
     * @param                       $id
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function postEdit(EditStaticPageRequest $request, $id)
    {
        try {
            $page = Content::findOrFail($id);
        } catch (NotFoundHttpException $e) {

            // page for editing not found
            return redirect()
                ->route('content.overview')
                ->with('error', trans('admin/contents.invalidPage'));
        }

        $request->url = Str::slug($request->url);

        // array of fields in database and fields from request
        $fields = [
            'title'            => 'title',
            'url'              => 'url',
            'template'         => 'template',
            'published_from'   => 'publishedFrom',
            'published_to'     => 'publishedTo',
            'meta_keywords'    => 'metaKeywords',
            'meta_description' => 'metaDescription',
            'content'          => 'pageContent',
            'status'           => 'status'
        ];

        // save new values with history
        list($revision, $changedColumns) = $page->updateWithHistory($fields, $request->all());

        $changedColumns += call_user_func_array([$page->module_handler, 'edit'], [&$page, $request, $revision]);

        // was something changed?
        if ($changedColumns == 0) {
            return redirect()
                ->route('content.edit', ['id' => $page->id])
                ->with('error', trans('admin/contents.nothingToEdit'));
        }

        // fire event with
        Event::fire(new EditStaticPageEvent($page, $revision));

        // something was changed, inform user
        return redirect()
            ->route('content.edit', ['id' => $page->id])
            ->with('success', trans('admin/contents.successfullyEdited'));
    }

    /**
     * Method for changing page status
     *
     * This method is called in static page overview from quick actions. It checks if status is valid, if page exists
     * and updates status.
     *
     * @param $id
     * @param $status
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function changeStatus($id, $status)
    {
        // get possible statuses
        $statuses = ContentStatuses::getWithTranslations();
        unset($statuses[Content::STATUS_DELETED]);

        // check if given status is valid
        if (!isset($statuses[$status])) {
            return redirect()
                ->route('content.overview')
                ->with('error', trans('admin/contents.invalidStatus'));
        }

        try {
            // try to find this page
            $page = Content::findOrFail($id);
        } catch (NotFoundHttpException $e) {
            // page not found
            return redirect()
                ->route('content.overview')
                ->with('error', trans('admin/contents.invalidPage'));
        }

        // try to change the page
        list ($revision, $changedColumns) = $page->updateWithHistory(['status' => 'status'], ['status' => $status]);

        // was something changed?
        if ($changedColumns == 0) {
            return redirect()
                ->route('content.edit', ['id' => $page->id])
                ->with('error', trans('admin/contents.nothingToEdit'));
        }

        // fire events
        if ($status != Content::STATUS_DRAFT) {
            Event::fire(new PublishStaticPage($page, $revision));
        } else {
            Event::fire(new MakeDraftFromStaticPage($page, $revision));
        }

        // redirect back to overview with info for user
        return redirect()
            ->route('content.overview')
            ->with('success', trans('admin/contents.statusChanged'));
    }

    /**
     * Delete page
     *
     * @param $id
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function deletePage($id)
    {
        try {
            // try to find this page
            $page = Content::findOrFail($id);
        } catch (NotFoundHttpException $e) {
            // page not found
            return redirect()
                ->route('content.overview')
                ->with('error', trans('admin/contents.invalidPage'));
        }

        list ($revision, $changedColumns) = $page->updateWithHistory(['status' => 'status'], ['status' => Content::STATUS_DELETED]);

        // was something changed?
        if ($changedColumns == 0) {
            return redirect()
                ->route('content.edit', ['id' => $page->id])
                ->with('error', trans('admin/contents.nothingToEdit'));
        }

        // trigger delete event
        Event::fire(new DeleteStaticPage($page, $revision));

        // redirect back to overview with info for user
        return redirect()
            ->route('content.overview')
            ->with('success', trans('admin/contents.pageDeleted', [
                'name' => $page->title,
                'url'  => $page->url
            ]));
    }

    /**
     * Sets page as homepage
     *
     * @param $id
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function setHomepage($id)
    {
        try {
            // try to find this page
            /**
             * @var $page Content
             */
            $page = Content::findOrFail($id);
            $homepage = $page->getHomepage();
        } catch (NotFoundHttpException $e) {
            // page not found
            return redirect()
                ->route('content.overview')
                ->with('error', trans('admin/contents.invalidPage'));
        }


        list ($revision, $changedColumns) = $page->updateWithHistory(['is_homepage' => 'is_homepage'], ['is_homepage' => 1]);

        if ($homepage)
        $homepage->updateWithHistory(['isHomepage' => 'is_homepage'], ['ishomepage' => 0]);

        // was something changed?
        if ($changedColumns == 0) {
            return redirect()
                ->route('content.overview')
                ->with('error', trans('admin/contents.nothingToEdit'));
        }

        // trigger delete event
//        Event::fire(new DeleteStaticPage($page, $revision));

        // redirect back to overview with info for user
        return redirect()
            ->route('content.overview')
            ->with('success', trans('admin/contents.homepageSetup', [
                'name' => $page->title,
                'url'  => $page->url
            ]));
    }
}