export function formatJson (json) {
  let i = 0,
    il = 0,
    tab = "    ",
    newJson = "",
    indentLevel = 0,
    inString = false,
    currentChar = null;
  let flag = false;
  for (i = 0, il = json.length; i < il; i += 1) {
    currentChar = json.charAt(i);
    switch (currentChar) {
      case '{':
        if (i != 0 && json.charAt(i - 1) === '$') {
          newJson += currentChar;
          flag = true;
        } else if (!inString) {
          newJson += currentChar + "\n" + repeat(tab, indentLevel + 1);
          indentLevel += 1
        } else {
          newJson += currentChar
        }
        break;
      case '[':
        if (!inString) {
          newJson += currentChar + "\n" + repeat(tab, indentLevel + 1);
          indentLevel += 1
        } else {
          newJson += currentChar
        }
        break;
      case '}':
        if (flag) {
          newJson += currentChar;
          flag = false;
        } else if (!inString) {
          indentLevel -= 1;
          newJson += "\n" + repeat(tab, indentLevel) + currentChar
        } else {
          newJson += currentChar
        }
        break;
      case ']':
        if (!inString) {
          indentLevel -= 1;
          newJson += "\n" + repeat(tab, indentLevel) + currentChar
        } else {
          newJson += currentChar
        }
        break;
      case ',':
        if (!inString) {
          newJson += ",\n" + repeat(tab, indentLevel)
        } else {
          newJson += currentChar
        }
        break;
      case ':':
        if (!inString) {
          newJson += ": "
        } else {
          newJson += currentChar
        }
        break;
      case ' ':
      case "\n":
      case "\t":
        if (inString) {
          newJson += currentChar
        }
        break;
      case '"':
        if (i > 0 && json.charAt(i - 1) !== '\\') {
          inString = !inString
        }
        newJson += currentChar;
        break;
      default:
        newJson += currentChar;
        break
    }
  }
  return newJson;
}

function repeat(s, count) {
  return new Array(count + 1).join(s)
}



export function formatXml(text) {
  //去掉多余的空格
  text = '\n' + text.replace(/(<\w+)(\s.*?>)/g, function ($0, name, props) {
    return name + ' ' + props.replace(/\s+(\w+=)/g, " $1");
  });
  //把注释编码
  text = text.replace(/<!--(.+?)-->/g, function ($0, text) {
    var ret = '<!--' + escape(text) + '-->';
    //alert(ret);
    return ret;
  });
  //调整格式
  var rgx = /\n(<(([^\?]).+?)(?:\s|\s*?>|\s*?(\/)>)(?:.*?(?:(?:(\/)>)|(?:<(\/)\2>)))?)/mg;
  var nodeStack = [];
  var output = text.replace(rgx, function ($0, all, name, isBegin, isCloseFull1, isCloseFull2, isFull1, isFull2) {
    var isClosed = (isCloseFull1 == '/') || (isCloseFull2 == '/' ) || (isFull1 == '/') || (isFull2 == '/');
    //alert([all,isClosed].join('='));
    var prefix = '';
    if (isBegin == '!') {
      prefix = getPrefix(nodeStack.length);
    }
    else {
      if (isBegin != '/') {
        prefix = getPrefix(nodeStack.length);
        if (!isClosed) {
          nodeStack.push(name);
        }
      }
      else {
        nodeStack.pop();
        prefix = getPrefix(nodeStack.length);
      }
    }
    var ret = '\n' + prefix + all;
    return ret;
  });
  var prefixSpace = -1;
  var outputText = output.substring(1);
  //把注释还原并解码，调格式
  outputText = outputText.replace(/(\s*)<!--(.+?)-->/g, function ($0, prefix, text) {
    if (prefix.charAt(0) == '\r')
      prefix = prefix.substring(1);
    text = unescape(text).replace(/\r/g, '\n');
    var ret = '\n' + prefix + '<!--' + text.replace(/^\s*/mg, prefix) + '-->';
    //alert(ret);
    return ret;
  });
  return outputText.replace(/\s+$/g, '').replace(/\r/g, '\r\n');
}

/**
 * @param time 时间
 * @param cFormat 格式
 * @returns {string|null} 字符串
 * @example formatTime('2018-1-29', '{y}/{m}/{d} {h}:{i}:{s}') // -> 2018/01/29 00:00:00
 */
export function formatTime(time, cFormat) {
  if (arguments.length === 0) return null;
  if ((time + '').length === 10) {
    time = +time * 1000;
  }
  let format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}', date;
  if (typeof time === 'object') {
    date = time;
  } else {
    date = new Date(time);
  }
  let formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  };
  return format.replace(/{([ymdhisa])+}/g, (result, key) => {
    let value = formatObj[key];
    if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1];
    if (result.length > 0 && value < 10) {
      value = '0' + value;
    }
    return value || 0;
  });
}

function getPrefix(prefixIndex) {
  var span = ' ';
  var output = [];
  for (var i = 0; i < prefixIndex; ++i) {
    output.push(span);
  }
  return output.join('');
}