import Logger from "./logger";
import WxData from "./wxData";

let systemInfo;
export function getSystemInfo() {
  if (systemInfo) return systemInfo;
  systemInfo = wx.getSystemInfoSync();
  return systemInfo;
}

export function isIos() {
  const sys = getSystemInfo();
  return /iphone|ios/i.test(sys.platform);
}

class Gesture {
  /**
   * 左滑
   * @param {object} e 事件对象
   * @returns {boolean} 布尔值
   */
  isLeft(gesture = {}, touche = {}) {
    const { startX, startY } = gesture;
    const deltaX = touche.clientX - startX;
    const deltaY = touche.clientY - startY;
    if (deltaX < -60 && deltaY < 20 && deltaY > -20) {
      return true;
    } else {
      return false;
    }
  }
  /**
   * 右滑
   * @param {object} e 事件对象
   * @returns {boolean} 布尔值
   */
  isRight(gesture = {}, touche = {}) {
    const { startX, startY } = gesture;
    const deltaX = touche.clientX - startX;
    const deltaY = touche.clientY - startY;

    if (deltaX > 60 && deltaY < 20 && deltaY > -20) {
      return true;
    } else {
      return false;
    }
  }
}

class DateUtil {
  newDate(year, month, date) {
    let cur = `${+year}-${+month}-${+date}`;
    if (isIos()) {
      cur = `${+year}/${+month}/${+date}`;
    }
    return new Date(cur);
  }
  /**
   * 计算指定日期时间戳
   * @param {object} date
   */
  getTimeStamp(dateInfo) {
    if (typeof dateInfo === "string") {
      dateInfo = this.transformDateRow2Dict(dateInfo);
    }
    if (Object.prototype.toString.call(dateInfo) !== "[object Object]") return;
    const dateUtil = new DateUtil();
    return dateUtil.newDate(dateInfo.year, dateInfo.month, dateInfo.date).getTime();
  }
  /**
   * 计算指定月份共多少天
   * @param {number} year 年份
   * @param {number} month  月份
   */
  getDatesCountOfMonth(year, month) {
    return new Date(Date.UTC(year, month, 0)).getUTCDate();
  }
  /**
   * 计算指定月份第一天星期几
   * @param {number} year 年份
   * @param {number} month  月份
   */
  firstDayOfWeek(year, month) {
    return new Date(Date.UTC(year, month - 1, 1)).getUTCDay();
  }
  /**
   * 计算指定日期星期几
   * @param {number} year 年份
   * @param {number} month  月份
   * @param {number} date 日期
   */
  getDayOfWeek(year, month, date) {
    return new Date(Date.UTC(year, month - 1, date)).getUTCDay();
  }
  todayFMD() {
    const _date = new Date();
    const year = _date.getFullYear();
    const month = _date.getMonth() + 1;
    const date = _date.getDate();
    return {
      year: +year,
      month: +month,
      date: +date,
    };
  }
  todayTimestamp() {
    const { year, month, date } = this.todayFMD();
    const timestamp = this.newDate(year, month, date).getTime();
    return timestamp;
  }
  toTimeStr(dateInfo = {}) {
    return `${+dateInfo.year}-${+dateInfo.month}-${+dateInfo.date}`;
  }
  transformDateRow2Dict(dateStr) {
    if (typeof dateStr === "string" && dateStr.includes("-")) {
      const [year, month, date] = dateStr.split("-");
      return this.tranformStr2NumOfDate({
        year,
        month,
        date,
      });
    }
    return {};
  }
  tranformStr2NumOfDate(date = {}) {
    const target = { ...date };
    // 可能传入字符串
    target.year = +target.year;
    target.month = +target.month;
    target.date = +target.date;
    return target;
  }
  sortDatesByTime(dates = [], sortType) {
    return dates.sort((a, b) => {
      const at = this.getTimeStamp(a);
      const bt = this.getTimeStamp(b);
      if (at < bt && sortType !== "desc") {
        return -1;
      } else {
        return 1;
      }
    });
  }
  getPrevMonthInfo(date = {}) {
    const prevMonthInfo =
      Number(date.month) > 1
        ? {
            year: +date.year,
            month: Number(date.month) - 1,
          }
        : {
            year: Number(date.year) - 1,
            month: 12,
          };
    return prevMonthInfo;
  }
  getNextMonthInfo(date = {}) {
    const nextMonthInfo =
      Number(date.month) < 12
        ? {
            year: +date.year,
            month: Number(date.month) + 1,
          }
        : {
            year: Number(date.year) + 1,
            month: 1,
          };
    return nextMonthInfo;
  }
  getPrevYearInfo(date = {}) {
    return {
      year: Number(date.year) - 1,
      month: +date.month,
    };
  }
  getNextYearInfo(date = {}) {
    return {
      year: Number(date.year) + 1,
      month: +date.month,
    };
  }
  findDateIndexInArray(target, dates) {
    return dates.findIndex((item) => dateUtil.toTimeStr(item) === dateUtil.toTimeStr(target));
  }
  calcDates(year, month) {
    const datesCount = this.getDatesCountOfMonth(year, month);
    const dates = [];
    const today = dateUtil.todayFMD();
    for (let i = 1; i <= datesCount; i++) {
      const week = dateUtil.getDayOfWeek(+year, +month, i);
      const date = {
        year: +year,
        id: i - 1,
        month: +month,
        date: i,
        week,
        isToday: +today.year === +year && +today.month === +month && i === +today.date,
      };
      dates.push(date);
    }
    return dates;
  }
  /**
   * 日期数组根据日期去重
   * @param {array} array 数组
   */
  uniqueArrayByDate(array = []) {
    let uniqueObject = {};
    let uniqueArray = [];
    array.forEach((item) => {
      uniqueObject[dateUtil.toTimeStr(item)] = item;
    });
    for (let i in uniqueObject) {
      uniqueArray.push(uniqueObject[i]);
    }
    return uniqueArray;
  }
  /**
   * 筛选指定年月日期
   * @param {object} target 指定年月
   * @param {array} dates 待筛选日期
   */
  filterDatesByYM(target, dates) {
    if (target) {
      const { year, month } = target;
      const _dates = dates.filter((item) => +item.year === +year && +item.month === +month);
      return _dates;
    }
    return dates;
  }
  getWeekHeader(firstDayOfWeek) {
    let weeksCh = ["日", "一", "二", "三", "四", "五", "六"];
    if (firstDayOfWeek === "Mon") {
      weeksCh = ["一", "二", "三", "四", "五", "六", "日"];
    }
    return weeksCh;
  }
}

/**
 * 获取当前页面实例
 */
export function getCurrentPage() {
  const pages = getCurrentPages() || [];
  const last = pages.length - 1;
  return pages[last] || {};
}

export function getComponentById(componentId) {
  const logger = new Logger();
  let page = getCurrentPage() || {};
  if (page.selectComponent && typeof page.selectComponent === "function") {
    if (componentId) {
      return page.selectComponent(componentId);
    } else {
      logger.warn("请传入组件ID");
    }
  } else {
    logger.warn("该基础库暂不支持多个小程序日历组件");
  }
}

export const logger = new Logger();
export const calendarGesture = new Gesture();
export const dateUtil = new DateUtil();
export const getCalendarData = (key, component) => new WxData(component).getData(key);
export const setCalendarData = (data, component) => new WxData(component).setData(data);
export const getCalendarConfig = (component) => getCalendarData("config", component);
export const setCalendarConfig = (config, component) =>
  setCalendarData(
    {
      config,
    },
    component,
  );