// ==UserScript==
// @name  AC-有道取词+翻译
// @version 0.1
// @namespace youdao
// @author  AC -modified from ：Liu Yuyang(sa@linuxer.me)
// @description 一个可以在浏览器中自由使用的屏幕取词脚本-alt+鼠标翻译，或者选中按Q翻译
// @include *
// @note 2015-11-26 修改部分地方适合自己使用，选中文字，按下Q翻译，或者alt+鼠标选中，自动翻译
// @icon    https://coding.net/u/zb227/p/zbImg/git/raw/master/icon.jpg
// @grant GM_xmlhttpRequest
// @downloadURL none
// ==/UserScript==

window.document.body.addEventListener("mousemove", function(e){curX = e.clientX; curY = e.clientY;}, false);
window.document.body.addEventListener("keypress", callbackWrapper, false);
window.document.body.addEventListener("mouseup", callbackWrapper, false);

var curX;
var curY;
var timeout;
function callbackWrapper(e) {
    if(e.key == "q" || e.type == "mouseup"){
          // remove previous .youdaoPopup if exists
          var previous = document.querySelector(".youdaoPopup");
          if (previous) {
            document.body.removeChild(previous);
          }
          // quick fix. with ctrl key held
          if (e.type == "mouseup" && !e.altKey) {
            return;
          }
          // debouncing
          clearTimeout(timeout);
          timeout = setTimeout(function(){
            translate();
          }, 120);
  }
}

function translate() {
  //console.log("translate start");
  var selectObj = document.getSelection()

  // if #text node
  if (selectObj.anchorNode.nodeType == 3) {
    //GM_log(selectObj.anchorNode.nodeType.toString());
    var word = selectObj.toString();
    if (word == "") {
      return;
    }
    // linebreak wordwrap, optimize for pdf.js
    word = word.replace('-\n','');
    // multiline selection, optimize for pdf.js
    word = word.replace('\n', ' ');
    //console.log("word:", word);
    var ts = new Date().getTime();
    //console.log("time: ", ts);
    var mx = curX;
    var my = curY;
    translate(word, ts);

  }

  function popup(mx, my, result) {
    //console.log(mx)
    //console.log(my)
    //console.log("popup window!")
    var youdaoWindow = document.createElement('div');
    youdaoWindow.classList.toggle("youdaoPopup");
    // parse 
    var dictJSON = JSON.parse(result);
    console.log(dictJSON);
    var query = dictJSON['query'];
    var errorCode = dictJSON['errorCode'];
    if (dictJSON['basic']) {
      word();
    } else {
      sentence();
    }
    // main window
    // first insert into dom then there is offsetHeight！IMPORTANT！
    document.body.appendChild(youdaoWindow);
    youdaoWindow.style.color = "black";
    youdaoWindow.style.textAlign = "left";
    youdaoWindow.style.display = "block";
    youdaoWindow.style.position = "fixed";
    youdaoWindow.style.background = "lightblue";
    youdaoWindow.style.borderRadius = "5px";
    youdaoWindow.style.boxShadow = "0 0 5px 0"
    youdaoWindow.style.opacity = "0.9"
    youdaoWindow.style.width = "200px";
    youdaoWindow.style.wordWrap = "break-word";
    youdaoWindow.style.left = mx + 10 + "px";
    if (mx + 200 + 30 >= window.innerWidth) {
      youdaoWindow.style.left = parseInt(youdaoWindow.style.left) - 200 + "px";
    }
    if (my + youdaoWindow.offsetHeight + 30 >= window.innerHeight) {
      youdaoWindow.style.bottom = "20px";
    } else {
      youdaoWindow.style.top = my + 10 + "px";
    }
    youdaoWindow.style.padding = "5px";
    youdaoWindow.style.zIndex = '999999'

    function word() {

      function play(word) {
        //console.log("[DEBUG] PLAYOUND")

        function playSound(buffer) {
          var source = context.createBufferSource();
          source.buffer = buffer;
          source.connect(context.destination);
          source.start(0);
        }

        var context = new AudioContext()
        var soundUrl = `https://dict.youdao.com/dictvoice?type=2&audio=${word}`
        var p = new Promise(function(resolve, reject) {
          var ret = GM_xmlhttpRequest({
            method: "GET",
            url: soundUrl,
            responseType: 'arraybuffer',
            onload: function(res) {
              try {
                context.decodeAudioData(res.response, function(buffer) {
                  resolve(buffer);
                })
              } catch(e) {
                reject(e);
              }
            }
          });
        });
        p.then(playSound, function(e) {
          console.log(e);
        });
      }

      var basic = dictJSON['basic'];
      var header = document.createElement('p');
      // header 
      var span = document.createElement('span')
      span.innerHTML = query;
      header.appendChild(span)
      // phonetic if there is
      var phonetic = basic['phonetic'];
      if (phonetic) {
        var phoneticNode = document.createElement('span')
        phoneticNode.innerHTML = '[' + phonetic + ']'
        phoneticNode.style.cursor = "pointer";
        header.appendChild(phoneticNode);
        var playLogo = document.createElement('span');
        header.appendChild(phoneticNode);
        phoneticNode.addEventListener('mouseup', function(e){
          if (e.target === phoneticNode) {
          }
          e.stopPropagation();
          play(query)}, false);
      }
      header.style.color = "darkBlue";
      header.style.margin = "0";
      header.style.padding = "0";
      span.style.fontweight = "900";
      span.style.color = "black";

      youdaoWindow.appendChild(header);
      var hr = document.createElement('hr')
      hr.style.margin = "0";
      hr.style.padding = "0";
      hr.style.height = "1px";
      hr.style.borderTop = "dashed 1px black";
      youdaoWindow.appendChild(hr);
      var ul = document.createElement('ul');
      // ul style
      ul.style.margin = "0";
      ul.style.padding = "0";
      basic['explains'].map(function(trans) {
        var li = document.createElement('li');
        li.style.listStyle = "none";
        li.style.margin = "0";
        li.style.padding = "0";
        li.style.background = "none";
        li.style.color = "inherit";
        li.appendChild(document.createTextNode(trans));
        ul.appendChild(li);
      })
      youdaoWindow.appendChild(ul);

    }

    function sentence() {
      var ul = document.createElement('ul');
      // ul style
      ul.style.margin = "0";
      ul.style.padding = "0";
      dictJSON['translation'].map(function(trans) {
        var li = document.createElement('li');
        li.style.listStyle = "none";
        li.style.margin = "0";
        li.style.padding = "0";
        li.style.background = "none";
        li.style.color = "inherit";
        li.appendChild(document.createTextNode(trans));
        ul.appendChild(li);
      })
      youdaoWindow.appendChild(ul);
    }
  }


  function translate(word, ts) {
    var reqUrl = `http://fanyi.youdao.com/openapi.do?type=data&doctype=json&version=1.1&relatedUrl=http%3A%2F%2Ffanyi.youdao.com%2F%23&keyfrom=fanyiweb&key=null&translate=on&q=${word}&ts=${ts}`
    //console.log("request url: ", reqUrl);
    var ret = GM_xmlhttpRequest({
      method: "GET",
      url: reqUrl,
      headers: {"Accept": "application/json"},  // can be omitted...
      onreadystatechange: function(res) {
        //console.log("Request state changed to: " + res.readyState);
      },
      onload: function(res) {
        var retContent = res.response;
        //console.log(retContent)
        popup(mx, my, retContent);
      },
      onerror: function(res) {
        console.log("error");
      }
    });
  }
}