<?php
namespace Modules\Gallery\Handlers;

use App\Enumerations\ModulesHandlerToId;
use App\Handlers\Contracts\AppHandler;
use App\Handlers\Handler;
use App\Handlers\History;
use App\Http\Controllers\Controller;
use App\Http\Requests\Request;
use App\Models\Content;
use App\Models\Directory;
use App\Models\File;
use App\Models\User;
use Illuminate\Support\Facades\Storage;

class Gallery implements AppHandler
{
    const CONFIG_FILENAME = 'photogallery-config';
    const DIRECTORY_NAME = 'photogallery-data';

    /**
     * Render given module into visitor area.
     *
     * @param Content $content    DB model from table contents
     * @param array   $parameters parameters used for modifications/custom settings of given model
     *
     * @return mixed
     */
    public function render(Content $content, $parameters)
    {
        // get directory ID
        $directoryId = $content->module_settings->directoryId;

        // get all images in given directory
        $images = File::where('directory_id', $directoryId)
                      ->where('mime_type', 'LIKE', 'image%')
                      ->get();

        // render content
        return Controller::VisitorsView($content->template, [
            'images' => $images,
            'page'   => $content,
            'extra'  => $parameters
        ]);
    }

    public static function getHistoryHandler()
    {
        return History::class;
    }

    /**
     * @param Content $content
     *
     * @return array
     */
    public static function loadExtraData(Content $content)
    {
        if (is_string($content->module_settings)) {
            $content->module_settings = json_decode($content->module_settings);
        }

        $extra = [
            'slider' => isset($content->module_settings->slider) ? $content->module_settings->slider : false
        ];

        return $extra;
    }

    /**
     * Save module-specific values into database
     *
     * @param Content $content
     * @param Request $request
     *
     * @return mixed
     * @internal param Widget $widget
     */
    public static function createNew(Content &$content, Request $request)
    {
        $parentDirectoryId = Storage::get(self::CONFIG_FILENAME);

        // create new directory for images
        $directory = Directory::create([
                                           'name'        => $content->id . '_' . $request->title,
                                           'description' => $request->description,
                                           'parent_id'   => $parentDirectoryId
                                       ]);

        // save id into module_config array
        $settings = ['directoryId' => $directory->id];

        // save settings
        $content->module_settings = json_encode($settings);
    }

    /**
     * Method used for editing existing content page.
     *
     * Reason why it is separated from createNew() method is simple - we need to save history of changes.
     *
     * @param Content $content
     * @param Request $request
     *
     * @param         $revisionID string ID of revision used
     *
     * @return int number of edited fields
     */
    public static function edit(Content &$content, Request $request, $revisionID)
    {
        // nothing to edit
    }

    /**
     * Does given module manage content? Or is it just module with widgets/something internal/something absolutely else?
     *
     * @return bool
     */
    public static function managesContent()
    {
        return true;
    }

    public static function getModuleId()
    {
        $handler = config('gallery.handler');
        $allModules = ModulesHandlerToId::getWithTranslations();
        $moduleId = isset($allModules[$handler]) ? $allModules[$handler] : null;

        return $moduleId;
    }

    /**
     * Getter for section names in creating/editing content resource
     *
     * @return mixed
     */
    public static function getExtendedFormSections()
    {
        $sections = Handler::getExtendedFormSections();

        $sections['upload'] = trans('gallery::admin/content.upload');

        return $sections;
    }

    /**
     * Getter for views used in extended part of form for creating new content
     *
     * This method should return pairs <section, view-name>. View is returned only as name in plain text
     *
     * @return array of views/templates/html codes divided into section
     */
    public static function getExtendedFormInputsCreate()
    {
        $parts = Handler::getExtendedFormInputsCreate();
        $parts['upload'] = 'gallery::admin.content.newUpload';

        return $parts;
    }

    /**
     * Getter for extended part of form for editing existing content
     *
     * Basically, this method may be
     *
     * @return array of views/templates/html codes divided into section
     */
    public static function getExtendedFormInputsEdit()
    {
        $parts = Handler::getExtendedFormInputsCreate();
        $parts['upload'] = 'gallery::admin.content.editUpload';

        return $parts;
    }

    /**
     * Register admin menu (or multiple ones)
     *
     * This cannot be in ServiceProvider because Session is started at middleware. And ServiceProvider is called before
     * starting any middleware..
     *
     * @param User $user model of logged user
     */
    public static function registerAdminMenu(User $user)
    {
        $menu = \Menu::instance('mainMenu');
        $submenu = $menu->whereTitle(trans('admin/mainMenu.contentPages'));
        $submenu->dropdown(trans('gallery::module.name'), function ($submenu) use ($user) {
            $submenu->route('content.new', trans('gallery::admin/adminMenu.new'), ['moduleId' => self::getModuleId()], 10, ['icon' => 'fa fa-plus']);
            $submenu->route('content.overview', trans('gallery::admin/adminMenu.overview'), ['moduleId' => self::getModuleId()], 20, ['icon' => 'fa fa-list']);
            //            $submenu->route('emails.sent', trans('contactform::admin/adminMenu.sentMessages'), [], 30, ['icon' => 'fa fa-send']);
        }, 25, ['icon' => 'fa fa-camera']);
    }

    /**
     * Install module
     *
     * @return mixed
     */
    public static function install()
    {
        $directory = Directory::where('name', self::DIRECTORY_NAME)
                              ->first();

        if (!count($directory)) {
            $directory = Directory::create([
                                               'name'   => self::DIRECTORY_NAME,
                                               'hidden' => true
                                           ]);
        }

        Storage::put(self::CONFIG_FILENAME, $directory->id);
    }

    /**
     * Method called right after content page is marked as deleted
     *
     * This method is supposed to clean after "deleted" page.
     *
     * @param Content $content
     *
     * @return mixed
     */
    public static function delete(Content $content)
    {
        // try to convert module_settings into something more accessible
        if (is_string($content->module_settings)) {
            $content->module_settings = json_decode($content->module_settings);
        }

        // get directory id
        $directoryId = $content->module_settings->directoryId;

        $directory = Directory::find($directoryId);

        // check if gallery exists
        if (!$directory) {
            return;
        }

        // delete directory used as photogallery
        $directory->delete();
    }

    /**
     * Does this module support categories?
     *
     * @return boolean
     */
    public static function supportCategories()
    {
        return true;
    }
}