<?php

namespace App;

use Cache;
use Exception;
use GuzzleHttp\Client;
use Illuminate\Foundation\Application as IlluminateApplication;
use InvalidArgumentException;
use Log;

/**
 * Extends \Illuminate\Foundation\Application to override some defaults.
 */
class Application extends IlluminateApplication
{
    /**
     * Current Koel version. Must start with a v, and is synced with git tags/releases.
     *
     * @link https://github.com/phanan/koel/releases
     */
    const VERSION = 'v3.0.0';

    /**
     * We have merged public path and base path.
     *
     * @return string
     */
    public function publicPath()
    {
        return $this->basePath;
    }

    /**
     * Loads a revision'ed asset file, making use of gulp-rev
     * This is a copycat of L5's Elixir, but catered to our directory structure.
     *
     * @param string $file
     * @param string $manifestFile
     *
     * @return string
     */
    public function rev($file, $manifestFile = null)
    {
        static $manifest = null;

        $manifestFile = $manifestFile ?: $this->publicPath().'/public/build/rev-manifest.json';

        if (is_null($manifest)) {
            $manifest = json_decode(file_get_contents($manifestFile), true);
        }

        if (isset($manifest[$file])) {
            return $this->staticUrl("public/build/{$manifest[$file]}");
        }

        throw new InvalidArgumentException("File {$file} not defined in asset manifest.");
    }

    /**
     * Get a URL for static file requests.
     * If this installation of Koel has a CDN_URL configured, use it as the base.
     * Otherwise, just use a full URL to the asset.
     *
     * @param string $name The additional resource name/path.
     *
     * @return string
     */
    public function staticUrl($name = null)
    {
        $cdnUrl = trim(env('CDN_URL'), '/ ');

        return $cdnUrl ? $cdnUrl.'/'.trim(ltrim($name, '/')) : trim(asset($name));
    }

    /**
     * Get the latest version number of Koel from Github.
     *
     * @param Client $client
     *
     * @return string
     */
    public function getLatestVersion(Client $client = null)
    {
        $client = $client ?: new Client();

        if ($v = Cache::get('latestKoelVersion')) {
            return $v;
        }

        try {
            $v = json_decode($client->get('https://api.github.com/repos/phanan/koel/tags')->getBody())[0]->name;
            // Cache for a week
            Cache::put('latestKoelVersion', $v, 7 * 24 * 60);

            return $v;
        } catch (Exception $e) {
            Log::error($e);

            return self::VERSION;
        }
    }
}