import { isSupportWebp } from 'nw-detect';
/**
 * 解析url参数字符串，取得key对应的值
 * @param {String} _url    url字符串或hash串
 * @param {String} _key     key值
 * @param {String} _separator    分隔符
 * @return {String} key对应的value
 */
export function getParmvalByKey(url, _key, _separator) {
    let _url = url || '';
    _separator = _separator || '?';
    _url = _url.trim();
    var _separatorIndex = _url.indexOf(_separator);
    if (_separatorIndex < 0) {
        return '';
    }

    if (_separator != '#') {
        var _index = _url.indexOf('#') || 0;
        if (_index >= 0 && _separatorIndex < _index) {
            _url = _url.substring(0, _index);
        }
    }
    _url = _url.substr(_separatorIndex + 1);

    if (!_url) return '';
    _url = _url.split('&');
    for (var i = 0, l = _url.length, d; i < l; i++) {
        d = _url[i].indexOf('=');
        if (_url[i].substring(0, d) === _key) {
            return _url[i].substr(d + 1) || '';
        }
    }
    return '';
}

/**
 * 生成实时压缩图片地址
 * */
export function imgResize(_imgUrl: string, _width: number, _height: number, _crop?: number, _enlarge?: boolean, _qulity?: number) {
    if (!_imgUrl) return null;
    _crop = _crop || 0;
    _enlarge = _enlarge || false;

    if (_width >= 300) {
        _qulity = _qulity || 95;
    } else {
        _qulity = _qulity || 90;
    }

    //LOFTER-11583: 从网易摄影导入的图片，在dashboard转载时，页面不能正常显示图片，不正确
    //提取_imgUrl中真正的图片地址(剔除http://imgsize.ph.126.net/)
    if (_imgUrl.toLowerCase().indexOf('http://imgsize.ph.126.net') >= 0) {
        _imgUrl = getParmvalByKey(_imgUrl, 'imgurl', '?') || '';
        var _index = _imgUrl.lastIndexOf('_');
        if (!!_imgUrl && _index >= 0) {
            _imgUrl = _imgUrl.substring(0, _index);
        }

        if (!_imgUrl) return null;
    }

    if (!_width || _width < 0) return _imgUrl;
    if (!_height || _height < 0) _height = _width;
    _qulity = parseInt(_qulity) || 0;
    if (_qulity > 100) _qulity = 100;

    if (_imgUrl.indexOf('nos.netease.com') > 0 || _imgUrl.indexOf('nosdn.127.net') > 0 || _imgUrl.indexOf('nosdn0.126.net') > 0 || _imgUrl.indexOf('.lf126.net') > 0 || _imgUrl.indexOf('.lf127.net') > 0) {
        var resized = _imgUrl;
        var imageview = 'thumbnail=' + _width + (_crop == 1 ? 'y' : 'x') + _height + (!!_enlarge ? '&enlarge=1' : '');
        if (/\.gif/.test(_imgUrl)) {
            if (_width < 500) {
                imageview += '&type=jpg';
            }
        } else if (/\.png/.test(_imgUrl)) {
            //LOFTER-7537: PC端发布多图时解决PNG图片预览问题
            imageview += '&type=png';
        } else {
            imageview += '&type=jpg';
        }

        if (/thumbnail=\d+[xyz]\d+/.test(_imgUrl)) {
            resized = _imgUrl.replace(/thumbnail=\d+[xyz]\d+/, imageview);
        } else if (/imageView/.test(_imgUrl)) {
            resized = _imgUrl.replace(/imageView/, 'imageView&' + imageview);
        } else if (/\?/.test(_imgUrl) && /#/.test(_imgUrl)) {
            resized = _imgUrl.replace(/#/, '&imageView&' + imageview + "#");
        } else if (/\?/.test(_imgUrl) && !/#/.test(_imgUrl)) {
            resized = _imgUrl + '&imageView&' + imageview;
        } else {
            resized = _imgUrl + '?imageView&' + imageview;
        }

        //LOFTER-21319:修复专题中裁剪nos图片引起的水印大小异常
        if (/watermark&/.test(resized)) {
            var _dx = 8;
            var _dy = 10;
            var _fontsize = 240;
            if (_width >= 1680) {
                _dx = 32;
                _dy = 36;
                _fontsize = 680;
            } else if (_width > 500) {
                _dx = 16;
                _dy = 20;
                _fontsize = 360;
            } else if (_width >= 300) {
                _dx = 8;
                _dy = 10;
                _fontsize = 240;
            }

            resized = resized.replace(/dx=\d+/, 'dx=' + _dx);
            resized = resized.replace(/dy=\d+/, 'dy=' + _dy);
            resized = resized.replace(/fontsize=\d+/, 'fontsize=' + _fontsize);

        }

        return resized;
    } else if (_imgUrl.indexOf('img.alicdn.com') >= 0) {
        // console.log('_imgUrl', _imgUrl);
        // alicdn的裁剪参数暂未找到文档，全部转成400x400的jpg，png有几率404
        let resize = _imgUrl + '_400x400Q80.jpg'
        // console.log('resize', resize);
        return resize;
    } else {
        // ph.126.net 不在使用
        // return 'http://imgsize.ph.126.net/?' + (!!_enlarge ? 'enlarge=true&' : '') + 'imgurl=' + _imgUrl + '_' + _width + 'x' + _height + 'x' + _crop + (_qulity > 0 ? ('x' + _qulity) : '') + '.jpg';
        return _imgUrl;
    }
}

export const removeImgQuery = (url?: string) => {
    return url ? url.split('?')[0] : url
}

export const formatImage = (url: string, options: {
    width: number,
    height: number,
    crop?: boolean,
    enlarge?: boolean,
    quality?: number,
} = {
        width: 1125,
        height: 0,
        crop: false,
        enlarge: true,
        quality: 75
    }) => {
    if (!url) return url;
    const {
        width = 1125,
        height = 0,
        crop = false,
        enlarge = true,
        quality = 75,
    } = options;
    url = removeImgQuery(url);
    if (url.indexOf('nos.netease.com') > 0 || url.indexOf('nosdn.127.net') > 0 || url.indexOf('.lf126.net') > 0 || url.indexOf('.lf127.net') > 0) {
        // nos图片
        const isGif = /\.gif/.test(url);
        const webp = isSupportWebp();
        const size = `&thumbnail=${width}${(crop ? 'y' : 'x')}${height}${enlarge ? '&enlarge=1' : ''}`
        let type = '&typefallback=jpg';
        if (webp) {
            type += '&type=webp';
            if (isGif) {
                type += '&tostatic=0';
            }
        }
        url += `?imageView${size}${quality !== 75 ? '&quality=' + quality : ''}${type}`
    } else if (url.indexOf('img.alicdn.com') > 0) {
        // alicdn图片
        url += '_400x400Q80.jpg'
    }
    return url;
}