/**
 * 
 */

function DateParser() {
  this.weekArr = ["周一", "周二", "周三", "周四", "周五"];
}

DateParser.prototype._padLeftZero = function (str) {
  str = String(str);
  return ("00" + str).substr(str.length);
};

DateParser.prototype.getLocalTime = function (nS) {
  //转化时间格式
  let targetDate;
  if (typeof parseInt(nS) != "number") {
    targetDate = new Date(nS);
  } else {
    targetDate = new Date(parseInt(nS) * 1000);
  }
  let str =
    targetDate.getFullYear() +
    "-" +
    this._padLeftZero(targetDate.getMonth() + 1) +
    "-" +
    this._padLeftZero(targetDate.getDate()) +
    " " +
    this._padLeftZero(targetDate.getHours()) +
    ":" +
    this._padLeftZero(targetDate.getMinutes() + 1);

  let currentDate = new Date();
  let $_time_day = currentDate.getDate();
  let $_time_month = currentDate.getMonth() + 1;
  let $_time_year = currentDate.getFullYear();
  // let $_time_week = currentDate.getDay();
  let timeText = "";

  let time = str.substr(11, 5);

  if (this.isYesterday(currentDate, targetDate) == 1) {
    timeText = "昨天";
    return timeText + " " + time;
  }

  //判断是不是同一个星期，如果是就排除 今天，昨天 这两天
  let isWeekFlag = this.isWeek(currentDate, targetDate);
  if (isWeekFlag.is) {
    if (isWeekFlag.cWeek - isWeekFlag.tWeek >= 2) {
      timeText = this.weekArr[isWeekFlag.tWeek - 1];
      return timeText + " " + time;
    }
  }
  if (str.substr(0, 4) == $_time_year) {
    //同一年份
    if (str.substr(5, 2) == $_time_month) {
      //同一月份
      if (str.substr(8, 2) == $_time_day) {
        return time;
      } else {
        timeText = str.substr(5, 5);
      }
    } else {
      timeText = str.substr(5, 5);
    }
  } else {
    timeText = str.substr(0, 7);
  }
  return timeText + " " + time;
};

//返回出相隔多少天，如果返回 1 就代表昨天
DateParser.prototype.isYesterday = function (currentDate, targetDate) {
  let t = new Date(
    targetDate.getFullYear() +
      "/" +
      (targetDate.getMonth() + 1) +
      "/" +
      targetDate.getDate()
  );
  let c = new Date(
    currentDate.getFullYear() +
      "/" +
      (currentDate.getMonth() + 1) +
      "/" +
      currentDate.getDate()
  );

  let dateNum = (c.getTime() - t.getTime()) / (24 * 3600 * 1000);
  return dateNum;
};

//判断你传进来的那个时间与当前时间是否为同一个星期
DateParser.prototype.isWeek = function (currentDate, targetDate) {
  let t = new Date(
    targetDate.getFullYear() +
      "/" +
      (targetDate.getMonth() + 1) +
      "/" +
      targetDate.getDate()
  );
  let c = new Date(
    currentDate.getFullYear() +
      "/" +
      (currentDate.getMonth() + 1) +
      "/" +
      currentDate.getDate()
  );

  let tWeek = t.getDay() == 0 ? 7 : t.getDay(); //星期天是0，手动改为 7
  let cWeek = c.getDay() == 0 ? 7 : c.getDay();
  let is = true;

  let dateNum = (c.getTime() - t.getTime()) / (24 * 3600 * 1000);
  if (dateNum >= 7) {
    //超出或等于7天就不是在同一个星期内
    is = false;
  } else {
    if (tWeek == cWeek) {
      //同一天，间隔小于7天 且星期相等为同一天
      is = true;
    } else {
      if (cWeek <= tWeek) {
        // 如果当前是星期2，而目标日期为星期5 则不同星期
        is = false;
      } else {
        //只有当 目标星期 小于当前日期 才有可能为同个星期
        //就是说 你传进来的时间是星期2，当前是星期5，他们的间隔小于7天就是同一个星期
        is = true;
      }
    }
  }

  return { is, cWeek, tWeek };
};
let dateParserTime = new DateParser();
export default dateParserTime.getLocalTime.bind(dateParserTime);