/* eslint-disable */

/**
 * Date对象的补充函数，包括类似Python中的strftime()
 * 阿债 https://gitee.com/azhai/datetime.js
 */

Date.prototype.toMidnight = function() {
  this.setHours(0);
  this.setMinutes(0);
  this.setSeconds(0);
  this.setMilliseconds(0);
  return this;
};

Date.prototype.daysAgo = function(days, midnight) {
  days = days ? days - 0 : 0;
  const date = new Date(this.getTime() - days * 8.64e7);
  return midnight ? date.toMidnight() : date;
};

Date.prototype.monthBegin = function(offset) {
  offset = offset ? offset - 0 : 0;
  const days = this.getDate() - 1 - offset;
  return this.daysAgo(days, true);
};

Date.prototype.quarterBegin = function() {
  const month = this.getMonth() - (this.getMonth() % 3);
  return new Date(this.getFullYear(), month, 1).toMidnight();
};

Date.prototype.yearBegin = function() {
  return new Date(this.getFullYear(), 0, 1).toMidnight();
};

Date.prototype.strftime = function(format, local) {
  if (!format) {
    const str = new Date(this.getTime() + 2.88e7).toISOString();
    return str.substr(0, 16).replace("T", " ");
  }
  local = local && local.startsWith("zh") ? "zh" : "en";
  const padZero = function(str, len) {
    const pads = len - str.toString().length;
    return (pads && pads > 0 ? "0".repeat(pads) : "") + str;
  };
  format = format.replace("%F", "%Y-%m-%d");
  format = format.replace(/%D|%x/, "%m/%d/%y");
  format = format.replace(/%T|%X/, "%H:%M:%S");
  format = format.replace("%R", "%H:%M");
  format = format.replace("%r", "%H:%M:%S %p");
  format = format.replace("%c", "%a %b %e %H:%M:%S %Y");
  const _this = this;
  return format.replace(/%[A-Za-z%]/g, function(f) {
    let ans = f;
    switch (f) {
      case "%%":
        ans = "%";
        break;

      case "%Y":
      case "%G":
        ans = _this.getFullYear();
        break;

      case "%y":
        ans = _this.getFullYear() % 100;
        break;

      case "%C":
        ans = _this.getFullYear() / 100;
        break;

      case "%m":
      case "%n":
        ans = _this.getMonth() + 1;
        break;

      case "%B":
        local = local.startsWith("en") ? "english" : local;

      case "%b":
        const m = _this.getMonth();
        ans = local_labels.monthes[local][m];
        break;

      case "%d":
      case "%e":
        ans = _this.getDate();
        break;

      case "%j":
        ans = _this.getDaysOfYear();
        break;

      case "%U":
      case "%W":
        const ws = _this.getWeeksOfYear(f === "%W");
        ans = padZero(ws, 2);
        break;

      case "%w":
        ans = _this.getDay();

      case "%u":
        ans = ans === 0 ? 7 : ans;
        break;

      case "%A":
        local = local.startsWith("en") ? "english" : local;

      case "%a":
        const d = _this.getDay();
        ans = local_labels.weekdays[local][d];
        break;

      case "%H":
      case "%k":
        ans = _this.getHours();
        break;

      case "%I":
      case "%l":
        ans = _this.getHours();
        ans = ans % 12;
        break;

      case "%M":
        ans = _this.getMinutes();
        break;

      case "%S":
        ans = _this.getSeconds();
        break;

      case "%s":
        ans = parseInt(_this.getTime() / 1e3);
        break;

      case "%f":
        const ms = _this.getMilliseconds();
        ans = padZero(ms * 1e3, 6);
        break;

      case "%P":
        local = local.startsWith("en") ? "english" : local;

      case "%p":
        const h = _this.getHours();
        ans = local_labels.meridians[local][h < 12 ? 0 : 1];
        break;

      case "%z":
        let tzo = _this.getTimezoneOffset();
        const sign = tzo < 0 ? "-" : "+";
        tzo = Math.abs(tzo);
        const ho = padZero(tzo / 60, 2);
        const mo = padZero(tzo % 60, 2);
        ans = sign + ho + mo;
        break;

      default:
        break;
    }
    if (
      f === "%C" ||
      f === "%y" ||
      f === "%m" ||
      f === "%d" ||
      f === "%H" ||
      f === "%M" ||
      f === "%S"
    ) {
      ans = padZero(ans, 2);
    }
    return ans.toString();
  });
};

Date.prototype.humanize = function(local) {
  local = local && local.startsWith("zh") ? "zh" : "en";
  const result = this.strftime("", local);
  const days = (Date.today() - this.toMidnight().getTime()) / 8.64e7;
  if (days <= -10 || days >= 10) {
    return result;
  }
  const labels = local_labels.dayagos[local];
  let lbl = "";
  if (days === 0 || days === 1) {
    lbl = labels[days];
  } else if (days === -1) {
    lbl = labels[2];
  } else if (days >= 2) {
    lbl = days + labels[3];
  } else {
    lbl = days + labels[4];
  }
  return lbl + result.substr(10, 6);
};

const local_labels = {
  monthes: {
    english: [
      "January",
      "February",
      "March",
      "April",
      "May",
      "June",
      "July",
      "August",
      "September",
      "October",
      "November",
      "December",
    ],
    en: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    zh: [
      "一月",
      "二月",
      "三月",
      "四月",
      "五月",
      "六月",
      "七月",
      "八月",
      "九月",
      "十月",
      "十一月",
      "十二月",
    ],
  },
  weekdays: {
    english: [
      "Sunday",
      "Monday",
      "Tuesday",
      "Wednesday",
      "Thursday",
      "Friday",
      "Saturday",
    ],
    en: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
    zh: ["日", "一", "二", "三", "四", "五", "六"],
  },
  meridians: {
    english: ["a.m.", "p.m."],
    en: ["AM", "PM"],
    zh: ["上午", "下午"],
  },
  dayagos: {
    english: ["Today", "Yesterday", "Tomorrow", " days ago", " days late"],
    en: ["Today", "Yesterday", "Tomorrow", " days ago", " days late"],
    zh: ["今天", "昨天", "明天", "天前", "天后"],
  },
};

export default Date;