<?php
namespace App\Helpers;

use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\Process\Exception\InvalidArgumentException;

class Template
{
    /**
     * Getter for real template name
     *
     * @param $template
     *
     * @return null|string
     */
    public static function name($template, $throwExceptions = true)
    {
        $namespace = null;
        if (strpos($template, '::')) {
            list($namespace, $template) = explode('::', $template);
            $namespace .= '::';
        }

        // list of prefixes
        $prefixes = ['custom.', ''];

        $view = null;
        foreach ($prefixes as $prefix) {
            if (view()->exists($namespace . 'visitor.' . $prefix . $template)) {
                $view = $namespace . 'visitor.' . $prefix . $template;
                break;
            }
        }

        if (is_null($view)) {
            if ($throwExceptions) {
                throw new InvalidArgumentException('Cannot find template for ' . $namespace . $template);
            } else {
                return false;
            }
        }

        return $view;
    }

    /**
     * Get URL to uploaded file
     *
     * @param $filename
     *
     * @return string
     */
    public static function upload($filename)
    {
        // for debug environment check if file exists
        if (env('APP_DEBUG') && !file_exists(config('app.upload_path') . '/' . $filename)) {
            throw new NotFoundHttpException('File ' . $filename . ' cannot be found in ' . config('app.upload_path') . '.');
        }

        // return url to uploaded file
        return config('app.upload_url') . '/' . $filename;
    }

    public static function thumbnail($filename)
    {
        // try to check if file have thumbnail
        if (file_exists(config('app.thumbnail_path') . '/' . $filename)) {
            $url = config('app.thumbnail_url') . '/' . $filename;
        } else {
            $url = self::upload($filename);
        }

        return $url;
    }

    /**
     * Get path to given asset
     *
     * @param $path
     *
     * @return string
     */
    public static function asset($path)
    {
        if (env('APP_DEBUG')) {
            if (empty($path)) {
                throw new InvalidArgumentException('No asset name defined!');
            }

            // check if asset exists and is file
            if (!file_exists(public_path('assets/' . config('app.theme') . '/' . $path))) {
                throw new NotFoundHttpException('Cannot find any asset in ' . public_path('assets/' . config('app.theme') . '/' . $path) . '. Try to check your paths.');
            }
        }

        return config('app.url') . '/assets/' . config('app.theme') . '/' . $path;
    }

    /**
     * Print date in configured format
     *
     * @param      $datestamp
     * @param bool $withTime
     *
     * @return false|string
     */
    public static function date($datestamp, $withTime = true)
    {
        $timestamp = strtotime($datestamp);

        if ($timestamp <= 0) {
            return '';
        }

        $format = $withTime ? config('app.datetime_format') : config('app.date_format');

        return date($format, $timestamp);
    }
}