<?php

namespace app\controllers;

use Yii;
use app\components\AbstractParent\Controller\AbstractController;
use app\components\ThumbGenerator;

class ImageController extends AbstractController
{
    /**
     * @param $image
     * @param $width
     * @param $height
     * @param $method
     * @param $extension
     *
     * @throws \Exception
     */
    public function actionResize($image, $width, $height, $method, $extension)
    {
        try {
            $this->resize($image, $width, $height, $method, $extension);
        } catch (\Exception $e) {
            http_response_code(400);
        }
        exit;
    }

    protected function resize($image, $width, $height, $method, $extension)
    {
        $resizeMethod = (isset(ThumbGenerator::$aliasCallback[$method])) ? ThumbGenerator::$aliasCallback[$method] : 'resize';
        $thumbGenerator = new ThumbGenerator();

        $filename = $image . '.' . $extension;
        $info = pathinfo($filename);

        if (!ThumbGenerator::getPathAllowed($info['dirname'])) {
            throw new \Exception('Path is not allowed "' . $info['dirname'] . '"');
        }

        if (!ThumbGenerator::getExtAllowed($info['extension'])) {
            throw new \Exception('Extension is not allowed "' . $info['extension'] . '"');
        }

        $webPath = Yii::getAlias('@webroot');
        $src = $webPath . '/' . $filename;
        if (!file_exists($src)) {
            $info = pathinfo(ThumbGenerator::NO_IMAGE_BASIC);
            $extension = $info['extension'];
            $image = $info['filename'];
            $src = $webPath . '/' . ThumbGenerator::NO_IMAGE_BASIC;
        }

        $dst = Yii::getAlias(ThumbGenerator::FS_THUMBNAIL_ALIAS) . "/{$image}_{$width}x{$height}{$method}.{$extension}";
        if (!file_exists($dst)) {
            $dstDir = dirname($dst);
            if (!file_exists($dstDir)) {
                mkdir($dstDir, 0777, true);
            }
            $thumbGenerator->$resizeMethod($src, $dst, ['width' => $width, 'height' => $height]);
        }
        $params = getimagesize($src);
        header('Content-Type: ' . $params['mime']);
        header('Content-Length: ' . filesize($dst));
        if (ob_get_length()) {
            ob_clean();
            flush();
        }
        readfile($dst);
        exit;
    }
}