<?php
namespace App\Cms\Interactions\Admin\Content;

use App\CMS\Contracts\Interaction;
use App\CMS\Enumerations\ContentStatuses;
use App\CMS\Helpers\CurrentTemplate;
use App\Events\EditContent as EditContentEvent;
use App\Http\Requests\Request;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Str;

class EditContent implements Interaction
{
    public function handle(Request $request, $parameters)
    {
        $page = $parameters[0];

        // upload file - if provided
        // todo use interaction
        $file = $page->uploadTitlePhoto($request);

        // let template to modify request and content page
        call_user_func_array([CurrentTemplate::handler(), 'beforeSave'], [&$page, $request]);

        $request->url = Str::slug($request->url);
        $request->parentPage = $request->parentPage ? $request->parentPage : null;
        $request->publishedFrom = empty($request->publishedFrom) ? null : $request->publishedFrom;
        $request->publishedTo = empty($request->publishedTo) ? null : $request->publishedTo;

        if (!$file) {
            $request->titlePhotoFilename = empty($request->existingTitlePhoto) ? null : $request->existingTitlePhoto;
        } else {
            $request->titlePhotoFilename = $file['filename'];
        }

        // 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',
            'parent_id'        => 'parentPage',
            'status'           => 'status',
            'title_photo'      => 'titlePhotoFilename',
            'category_id'      => 'category'
        ];

        // save new values with history
        // todo move this method out of the controller!
        $data = \App\Http\Controllers\Admin\Contents\EditContent::getFields($request, array_values($fields));

        // todo use Model Observer and model::original attributes

        list($revision, $changedColumns) = $page->updateWithHistory($fields, $data);

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


        // move to interaction
        $changedColumns += $page->uploadRelatedFiles($request, $revision);

        if ($changedColumns > 0) {
            Event::fire(new EditContentEvent($page, $revision));
        }

        return [$page, $revision, $changedColumns];
    }

    public function getValidationRules($parameters)
    {
        $id = $parameters[0]->id;

        // get all available statuses
        $statuses = ContentStatuses::getSimple();
        $statuses = implode(',', $statuses);

        return [
            'title'         => 'required',
            'url'           => 'required|unique:contents,url,' . $id,
            'publishedFrom' => 'date',
            'publishedTo'   => 'date',
            'title_photo'   => 'exists:files,id',
            'status'        => 'required|in:' . $statuses,
            'parentPage'    => 'exists:contents,id'
        ];
    }
}