var hexoLog = require('hexo-log');

var log = typeof hexoLog["default"] === 'function' ? hexoLog["default"]({

  debug: false,

  silent: false

}) : hexoLog({

  debug: false,

  silent: false

});

const htmlparser2 = require("htmlparser2");

/**

 * md 文件返回 true

 * @param {*} data 

 */

function ignore(data) {

    // TODO: 好奇怪，试了一下，md 返回 true, 但却需要忽略 取反！

    var source = data.source;

    var ext = source.substring(source.lastIndexOf('.')).toLowerCase();

    return ['md',].indexOf(ext) > -1;

}

function random(length) { // generate random string

    res = ''

    letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']

    for (let i = 0; i < length; i++) {

        let index = Math.round(Math.random() * 25)

        res += letters[index];

    }

    return res

}

function transform(img, fileName) {

    img = htmlparser2.parseDocument(img, "text/html").children[0]

    src = img.attribs.src

    title = img.attribs.title ? img.attribs.title : ""

    alt = img.attribs.alt ? img.attribs.alt : ""

    style = img.attribs.style ? img.attribs.style : ""

    // 这里对原插件的正则匹配进行了修改

    imgFile = src.match(RegExp(".*?(.+?)$"))[1]

    className = random(12)

    imgTag = "

    // 原插件的路径

    // var regExp = RegExp("!\\[(.*?)\\]\\(<?" + fileName + '/(.+?)>?\\)', "g");

    // var imgExp = RegExp("(<img.*?src=\"" + fileName + "/.+?\".*?>)", "g")

    // 新路径

    var regExp = RegExp("!\\[(.*?)\\]\\((.+?)\\)", "g");

    var imgExp = RegExp("(<img.*?src=\".+?\".*?>)", "g")

    // hexo g

    data.content = data.content.replace(regExp, "", "g");

    data.content = data.content.replace(imgExp, (match, img) => {return transform(img, fileName)}, "g")

    // log.info(`hexo-asset-img: filename: ${fileName}, title: ${data.title.trim()}`);

    // log.info(data.content)

    return data;

}

hexo.extend.filter.register('before_post_render',(data)=>{

    if(!ignore(data)){

        action(data)

    }

}, 0);