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

use App\Http\Requests\EditWidgetRequest;
use App\Models\Widget;
use App\Widgets\Exceptions\MissingParameterException;
use Illuminate\Support\Facades\Event;

class EditWidget extends Controller
{
    /**
     * Render edit form
     *
     * @param $id
     *
     * @return mixed
     */
    public function getEdit($id)
    {
        $widget = Widget::findOrFail($id);

        $presenter = call_user_func([$widget->widget_type_handler, 'getPresenter']);

        return call_user_func([$presenter, 'renderEditForm'], $widget);
    }

    /**
     * Save changes into database
     *
     * @param EditWidgetRequest $request
     * @param                   $widget
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function postEdit(EditWidgetRequest $request, $widget)
    {
        // create new widget
        $widget = Widget::findOrFail($widget);

        // update name
        $widget->name = $request->name;

        // save description if available
        if (isset($request->description)) {
            $widget->description = $request->description;
        }

        // try to save this widget
        try {
            $widget = call_user_func([$widget->widget_type_handler, 'save'], $widget, (object)$request->all());
        } catch (MissingParameterException $e) {
            // user omitted some value
            return $this->invalidWidget($e->getMessage());
        } catch (\Exception $e) {
            // something went wrong
            return $this->invalidWidget(trans('admin/widgets.cannotSave', ['exception' => $e->getMessage()]));
        }

        // save into database
        $widget->save();

        // fire event with editing widget
        Event::fire(new \App\Events\EditWidget($widget));

        // redirect with success notification
        return redirect()
            ->route('widgets.overview')
            ->with('success', trans('admin/widgets.successfullyEdited'));
    }

    /**
     * Deletes widget
     *
     * @param $id
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function deleteWidget($id) {
        // create new widget
        $widget = Widget::findOrFail($id);

        $widget->delete();

        // redirect with success notification
        return redirect()
            ->route('widgets.overview')
            ->with('success', trans('admin/widgets.successfullyDeleted'));
    }

    private function invalidWidget($error)
    {
        return redirect()
            ->route('widgets.overview')
            ->withInput()
            ->with('error', $error);
    }
}