<?php

/**
 * User: Zip
 * Date: 15/10/28
 * Time: 下午13:08
 */

namespace Plugin;

class Images
{

    private static $domain = '.static.yhbimg.com';
    private static $default_image = '/2015/08/25/02/01dd632a6e07bfef457ce4beda21dd6413.png';
    private static $domainList = array(
        '01' => array(
            'img10.static.yhbimg.com',
            'img11.static.yhbimg.com',
        ),
        '02' => array(
            'img12.static.yhbimg.com',
            'img13.static.yhbimg.com'
        ),
        'yhb-head' => 'head.static.yhbimg.com'
    );
    private static $staticDomain = array(
        'bucket' => ''
    );
    private static $qiniuDomain = 'yhfair.qiniudn.com';

    /**
     * 缩略图模板
     * @param $fileName
     * @param $bucket
     * @param string $position ()
     * @param string $background
     * @return string
     */
    static function template($fileName, $bucket = 'yhfair', $mode = 1)
    {
        return self::url($fileName, $bucket, $mode);
    }

    /**
     * 
     * @param unknown $fileName
     * @param string $bucket
     * @return string
     */
    public static function getSourceUrl($fileName, $bucket = 'yhfair')
    {
        if (stripos($fileName, 'http://') === 0) {
            return $fileName;
        }
        $domain = self::getDomain($bucket, $fileName);
        return 'http://' . $domain . '/' . $bucket . $fileName;
    }

    /**
     * 根据尺寸获得图片url
     * @param unknown $fileName
     * @param unknown $width
     * @param unknown $height
     * @param number $mode
     * @param string $bucket
     * @return mixed
     */
    public static function getImageUrl($fileName, $width, $height, $mode = 2, $bucket = 'goodsimg')
    {
        if (!is_string($fileName)) {
            return self::template(self::$default_image, $bucket, $mode);
        }
        if (stripos($fileName, 'http://') !== 0) {
            $fileName = self::template($fileName, $bucket, $mode);
        }
        return strtr($fileName, array('{width}' => $width, '{height}' => $height, '{mode}' => $mode));
    }

    /**
     * 获取图片URL模板
     * @param $fileName
     * @param int $mode
     * @param string $bucket
     * @return string
     */
    public static function url($fileName, $bucket = 'yhfair', $mode = 1)
    {
        $domain = self::getDomain($bucket, $fileName);
        return self::getImgTemplateUrl($bucket . $fileName, $mode, $domain);
    }

    public static function getDomain($bucket, $fileName)
    {
        $domain = '';
        if (!empty(self::$domainList[$bucket])) {
            $domain = self::$domainList[$bucket];
        } else {
            $node = mb_substr($fileName, 15, 2);
            if (!empty(self::$domainList[$node])) {
                $domainList = self::$domainList[$node];
                $nodeNum = sprintf('%u', crc32($fileName)) % count($domainList);
                $domain = $domainList[$nodeNum];
            }
        }
        return $domain;
    }

    /**
     * 获取模板的图片地址
     * @param $fileName
     * @param int $width
     * @param int $height
     * @param int $mode
     * @param null $domain
     * @return string
     */
    private static function getImgTemplateUrl($fileName, $mode = 1, $domain = null)
    {
        if ($domain == null) {
            $domain = self::$qiniuDomain;
        }
        $baseUrl = self::MakeBaseUrl($domain, $fileName);
        return self::MakeTemplateRequest($baseUrl);
    }

    private static function MakeBaseUrl($domain, $key) // => $baseUrl
    {
        $keyEsc = str_replace("%2F", "/", rawurlencode($key));
        return "http://$domain/$keyEsc";
    }

    private static function MakeTemplateRequest($url)
    {
        $ops = array();
        $ops[] = '{mode}';
        $ops[] = 'w/{width}';
        $ops[] = 'h/{height}';

        if (empty($ops)) {
            return $url;
        }

        return $url . "?imageView/" . implode('/', $ops);
    }

}