'use strict';

// ==UserScript==
// @name translator
// @namespace https://lufei.so
// @supportURL https://github.com/intellilab/translator.user.js
// @description 划词翻译
// @version 1.5.8
// @run-at document-start
// @grant GM_addStyle
// @grant GM_xmlhttpRequest
// @downloadURL none
// ==/UserScript==

var styles = {"container":"_container_qygl2_1","panel":"_panel_qygl2_6","body":"_body_qygl2_11","header":"_header_qygl2_24","detail":"_detail_qygl2_35"};
GM_addStyle("._container_qygl2_1 {\n  margin: 0;\n  padding: 0;\n  box-sizing: border-box;\n}\n._panel_qygl2_6 {\n  position: fixed;\n  max-width: 300px;\n  z-index: 10000;\n}\n._body_qygl2_11 {\n  position: relative;\n  padding: 8px;\n  border-radius: 4px;\n  border: 1px solid #eaeaea;\n  line-height: 24px;\n  color: #555;\n  background-color: #fff;\n  font-family: monospace, consolas;\n  font-size: 14px;\n  text-align: left;\n  word-break: break-all;\n}\n._header_qygl2_24 {\n  padding: 0 0 8px;\n  border-bottom: 1px dashed #aaa;\n  color: #333;\n}\n._header_qygl2_24 > [data-type] {\n  margin-left: 8px;\n  color: #7cbef0;\n  cursor: pointer;\n  font-size: 13px;\n}\n._detail_qygl2_35 {\n  margin: 8px 0 0;\n  line-height: 22px;\n  list-style: none;\n  font-size: 13px;\n}\n._detail_qygl2_35 > li {\n  font-size: 13px;\n  line-height: 26px;\n}\n");
var translator = initialize();

var entities = {
  '<': '&lt;',
  '&': '&amp;'
};
function htmlEntities(str) {
  return str && str.replace(/[<&]/g, function (char) {
    return entities[char];
  });
}

function render(data) {
  var body = translator.body,
      audio = translator.audio;

  body.innerHTML = '';
  var basic = data.basic,
      query = data.query,
      translation = data.translation;

  if (basic) {
    var us = basic['us-phonetic'],
        uk = basic['uk-phonetic'],
        explains = basic.explains;

    var nosm = '&hearts;';
    var header = document.createElement('div');
    header.className = styles.header;
    header.innerHTML = [`<span>${htmlEntities(query)}</span>`, `<span data-type="1">uk:[${uk || nosm}]</span>`, `<span data-type="2">us:[${us || nosm}]</span>`].join('');
    body.appendChild(header);
    header.addEventListener('click', function (e) {
      var type = e.target.dataset.type;

      if (type) {
        audio.src = `https://dict.youdao.com/dictvoice?audio=${encodeURIComponent(query)}&type=${type}`;
      }
    });
    if (explains) {
      var ul = document.createElement('ul');
      ul.className = styles.detail;
      for (var i = 0; i < explains.length; i += 1) {
        var li = document.createElement('li');
        li.innerHTML = explains[i];
        ul.appendChild(li);
      }
      body.appendChild(ul);
    }
  } else if (translation) {
    var div = document.createElement('div');
    div.innerHTML = translation[0];
    body.appendChild(div);
  }
}

function translate(e) {
  var sel = window.getSelection();
  var text = sel.toString();
  if (/^\s*$/.test(text)) return;
  var _document = document,
      activeElement = _document.activeElement;

  if (['input', 'textarea'].indexOf(activeElement.tagName.toLowerCase()) < 0 && !activeElement.contains(sel.getRangeAt(0).startContainer)) return;
  GM_xmlhttpRequest({
    method: 'GET',
    url: `https://fanyi.youdao.com/openapi.do?relatedUrl=http%3A%2F%2Ffanyi.youdao.com%2Fopenapi%3Fpath%3Dweb-mode&keyfrom=test&key=null&type=data&doctype=json&version=1.1&q=${encodeURIComponent(text)}`,
    onload(res) {
      var data = JSON.parse(res.responseText);
      if (!data.errorCode) {
        render(data);
        var panel = translator.panel;
        var _window = window,
            innerWidth = _window.innerWidth,
            innerHeight = _window.innerHeight;

        if (e.clientY > innerHeight * 0.5) {
          panel.style.top = 'auto';
          panel.style.bottom = `${innerHeight - e.clientY + 10}px`;
        } else {
          panel.style.top = `${e.clientY + 10}px`;
          panel.style.bottom = 'auto';
        }
        if (e.clientX > innerWidth * 0.5) {
          panel.style.left = 'auto';
          panel.style.right = `${innerWidth - e.clientX}px`;
        } else {
          panel.style.left = `${e.clientX}px`;
          panel.style.right = 'auto';
        }
        document.body.appendChild(panel);
      }
    }
  });
}

function debounce(func, delay) {
  var timer = void 0;
  function exec() {
    timer = null;
    func.apply(undefined, arguments);
  }
  return function () {
    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    if (timer) clearTimeout(timer);
    timer = setTimeout.apply(undefined, [exec, delay].concat(args));
  };
}

function initialize() {
  var audio = document.createElement('audio');
  audio.autoplay = true;
  var panel = document.createElement('div');
  panel.className = styles.panel;
  var panelBody = document.createElement('div');
  panelBody.className = styles.body;
  panel.appendChild(panelBody);
  var debouncedTranslate = debounce(translate);
  var isSelecting = void 0;
  document.addEventListener('mousedown', function (e) {
    isSelecting = false;
    if (panel.contains(e.target)) return;
    if (panel.parentNode) panel.parentNode.removeChild(panel);
    panelBody.innerHTML = '';
  }, true);
  document.addEventListener('mousemove', function () {
    isSelecting = true;
  }, true);
  document.addEventListener('mouseup', function (e) {
    if (panel.contains(e.target) || !isSelecting) return;
    debouncedTranslate(e);
  }, true);
  document.addEventListener('dblclick', function (e) {
    if (panel.contains(e.target)) return;
    debouncedTranslate(e);
  }, true);

  return {
    audio,
    panel,
    body: panelBody
  };
}