const fileHeader = {
  "/9j": { type: 'image', suffix: "JPG" },
  "iVB": { type: 'image', suffix: "PNG" },
  "Qk0": { type: 'image', suffix: "BMP" },
  "SUk": { type: 'image', suffix: "TIFF" },
  "JVB": { type: 'image', suffix: "PDF" },
  "UEs": { type: 'image', suffix: "OFD" },
  "IyF": { type: 'audio', suffix: "AMR" }
};
/**
 * 根据base64的前三个字符判断文件格式
 * @param base64
 * @returns base64 string
 */
export function addBase64head(base64) {
  if (base64.startsWith('data:/') || base64.startsWith('http')) {
    return base64;
  }
  const head = base64.substr(0, 3);
  if (fileHeader[head]) {
    return `data:${fileHeader[head].type}/${fileHeader[head].suffix.toLowerCase()};base64,${base64}`;
  }
  // 直接返回
  return base64;
}
// 格式化时间
export function formatTime(time, format, locale) {
  format = Object.assign({
    year: locale.message.year,
    month: locale.message.month,
    day: locale.message.day,
    hour: locale.message.hour,
    minute: locale.message.minute
  }, format || {});
  if (!time) {
    return null;
  }
  const date = new Date(time);
  const year = date.getFullYear();
  const month = date.getMonth() + 1;
  const day = date.getDate();
  let hour = date.getHours() + "";
  if (hour.length < 2) {
    hour = '0' + hour;
  }
  let minute = date.getMinutes() + "";
  if (minute.length < 2) {
    minute = '0' + minute;
  }
  const now = new Date();
  const dValue = judgeDay(date);
  if (dValue === -1) {
    // let yesterday = locale ? locale.conversation.yesterday : '';
    let yesterday = locale.conversation.yesterday;
    // return `${yesterday} ${hour}${format.hour}${minute}${format.minute}`;
    // return `${yesterday} ${hour}${format.hour}${minute}${format.minute}`;
    return `${yesterday}`;
  }
  if (now.getFullYear() === year) {
    if (now.toDateString() === date.toDateString()) {
      return `${hour}:${minute}`;
    }
    return `${month}/${day}`;
  }
  return locale.area === 'zh_CN' ? `${year}/${month}/${day}` : `${month}/${day}/${year}`;
  // else if (dValue === -2) {
  //   // let before = locale ? locale.conversation.before : '';
  //   let before = locale.conversation.before;
  //   return `${before} ${hour}${format.hour}${minute}${format.minute}`;
  // }
  // 同年
  // if (now.getFullYear() === year) {
  //   // 同月
  //   if (now.getMonth() + 1 === month) {
  //     // 同天
  //     if (now.toDateString() === date.toDateString()) {
  //       return `${hour}${format.hour}${minute}${format.minute}`;
  //     } else {
  //       return `${month}${format.month}${day}${format.day} ${hour}${format.hour}${minute}${format.minute}`;
  //     }
  //   } else {
  //     return `${month}${format.month}${day}${format.day} ${hour}${format.hour}${minute}${format.minute}`;
  //   }
  // }
  // return `${year}${format.year}${month}${format.month}`;
}
function judgeDay(sourceDate, targetDate = new Date()) {
  var year = sourceDate.getFullYear();
  var month = sourceDate.getMonth() + 1;
  var day = sourceDate.getDate();
  var d1 = new Date(year + '/' + month + '/' + day).getTime();
  var y = targetDate.getFullYear();
  var m = targetDate.getMonth() + 1;
  var d = targetDate.getDate();
  var d2 = new Date(y + '/' + m + '/' + d).getTime();
  var iday = (d1 - d2) / 1000 / 60 / 60 / 24;
  return iday;
}
export function getCursortPosition(element) {
  var caretOffset = 0;
  var doc = element.ownerDocument || element.document;
  var win = doc.defaultView || doc.parentWindow;
  var sel;
  if (typeof win.getSelection != "undefined") { //谷歌、火狐
    sel = win.getSelection();
    if (sel.rangeCount > 0) { //选中的区域
      var range = win.getSelection().getRangeAt(0);
      var preCaretRange = range.cloneRange(); //克隆一个选中区域
      preCaretRange.selectNodeContents(element); //设置选中区域的节点内容为当前节点
      preCaretRange.setEnd(range.endContainer, range.endOffset); //重置选中区域的结束位置
      caretOffset = preCaretRange.toString().length;
    }
  }
  else if ((sel = doc.selection) && sel.type != "Control") { //IE
    var textRange = sel.createRange();
    var preCaretTextRange = doc.body.createTextRange();
    preCaretTextRange.moveToElementText(element);
    preCaretTextRange.setEndPoint("EndToEnd", textRange);
    caretOffset = preCaretTextRange.text.length;
  }
  return caretOffset;
}
/**
 * 获取光标前的文本
 * @param containerEl
 * @returns
 */
export function getTextBeforeCursor(containerEl) {
  var precedingChar = '', sel, range, precedingRange;
  if (window.getSelection) {
    sel = window.getSelection();
    if (sel.rangeCount > 0) {
      range = sel.getRangeAt(0).cloneRange();
      range.collapse(true);
      range.setStart(containerEl, 0);
      precedingChar = range.cloneContents();
    }
  }
  else if ((sel = document.selection)) {
    range = sel.createRange();
    precedingRange = range.duplicate();
    precedingRange.moveToElementText(containerEl);
    precedingRange.setEndPoint("EndToStart", range);
    precedingChar = precedingRange.htmlText;
  }
  return [precedingChar, range];
}
export function delHtmlTag(str) {
  //正则去掉所有的html标记
  return str.replace(/<[^>]+>/g, '');
}
export function deepClone(target) {
  let result;
  if (typeof target === 'object') {
    if (Array.isArray(target)) {
      result = [];
      for (const i in target) {
        result.push(deepClone(target[i]));
      }
    }
    else if (target === null) {
      result = null;
    }
    else if (target instanceof RegExp) {
      result = target;
    }
    else {
      result = {};
      for (const i in target) {
        result[i] = deepClone(target[i]);
      }
    }
  }
  else {
    result = target;
  }
  return result;
}
export function formatTextMessage(content) {
  // const urlReg = new RegExp('(https?|ftp|file)://[-A-Za-z0-9+&@#/%?=~_|!:,.;]+[-A-Za-z0-9+&@#/%=~_|]', 'g');
  const urlReg = /(((^https?:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)$/g;
  // 简单的过滤
  content = content.replace('<', '&lt;');
  content = content.replace('>', '&gt;');
  if (urlReg.test(content)) {
    content = content.replace(urlReg, a => {
      let prefix = '';
      if (a.indexOf('http:') < 0 && a.indexOf('https:') < 0) {
        prefix = '//';
      }
      return `<a target="_blank" class="url-wrap" href="${prefix}${a}">${a}</a>`;
    });
  }
  return content;
}