<?php

namespace Grav\Plugin;

use Grav\Common\Config\Config;
use Grav\Common\GPM\Response;
use Grav\Common\Grav;
use Grav\Common\Uri;
use Grav\Common\Page\Collection;
use Grav\Common\Plugin;
use RocketTheme\Toolbox\Event\Event;

class LLInstagramPlugin extends Plugin
{
    const API_URL = '/instagram/api/media';

    public static function getSubscribedEvents()
    {
        return [
            'onPluginsInitialized' => ['onPluginsInitialized', 0]
        ];
    }

    public function onPluginsInitialized()
    {
        $this->enable([
            'onTwigInitialized' => ['onTwigInitialized', 0],
            'onTwigTemplatePaths' => ['onTwigTemplatePaths', 0],
        ]);
    }

    public function onTwigInitialized()
    {
        $this->grav['assets']->add('plugin://llinstagram/llinstagram.css');

        $this->grav['twig']->twig->addFunction(new \Twig_SimpleFunction('instagram_feed', [$this, 'feed']));
    }


    public function onTwigTemplatePaths()
    {
        $this->grav['twig']->twig_paths[] = __DIR__ . '/templates';
    }

    public function feed($templateFile = 'partials/llinstagram.html.twig')
    {
        $feed = $this->getImages();

        return $this->grav['twig']->twig()->render($templateFile, compact('feed'));
    }

    private function getImages()
    {
        $config = $this->mergeConfig($this->grav['page'], TRUE);

        $type = $config->get('llinstagram.type');
        $filter = $config->get('llinstagram.filter');
        $count = $config->get('llinstagram.count');
        $sort_order = $config->get('llinstagram.sort_order');

        $params = array(
            'filter' => $filter,
            'page_size' => $count,
            'page_number' => 0,
        );

        switch ($type) {
            case 'images':
                $params['type'] = 'GraphImage';
                break;

            case 'videos':
                $params['type'] = 'GraphVideo';
                break;
        }

        switch ($sort_order) {
            case 'likes':
                $params['sort_by'] = 'likes';
                $params['sort_order'] = 'desc';
                break;

            case 'random':
                $params['sort_order'] = 'random';
                break;

            case 'newest':
                $params['sort_by'] = 'taken_at';
                $params['sort_order'] = 'desc';
                break;

            case 'oldest':
                $params['sort_by'] = 'taken_at';
                $params['sort_order'] = 'asc';
                break;
        }

        $baseurl = Uri::getCurrentUri()->withScheme('https')->getBaseUrl();

        $url = sprintf('%s%s?%s', $baseurl, $this::API_URL, http_build_query($params));
        $data = Response::get($url);

        return json_decode($data);
    }
}