import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';
import 'dart:math';

class Utils {
  static Utils? _instance;

  Utils._internal();

  static Utils getInstance() {
    _instance ??= Utils._internal();

    return _instance!;
  }

  /// 关闭键盘
  static void hideKeyboard() {
    FocusScopeNode? currentFocus = Get.focusScope?.nearestScope;
    if (currentFocus == null) {
      return;
    }
    if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
      FocusManager.instance.primaryFocus?.unfocus();
    }
  }

  void setTimeOut(int seconds, call) => Future.delayed(Duration(seconds: seconds), call);
  Future<dynamic> setTimeOutMilliseconds(int milliseconds, call) => Future.delayed(Duration(milliseconds: milliseconds), call);

  // 是否是平板
  static bool isPad([double mobilePhoneScale = 1.2]) {
    return ScreenUtil().scaleWidth > mobilePhoneScale;
  }

  static String getDoubleRemoveZero(double? val, [String? defaultVal]) {
    try {
      if (val == null) throw Exception('数据为空');
      List<String> _valArr = val.toString().split('.');
      if (_valArr.length >= 2) {
        if (int.parse(_valArr[1]) == 0) {
          return val.toInt().toString();
        }
        return val.toString();
      }
      return val.toInt().toString();
    } catch (e) {
      return defaultVal ?? '';
    }
  }

  /// 去除小数点
  static String doubleToStringAsFixed(double val, {int fractionDigits = 2}) {
    return val.toStringAsFixed(fractionDigits).replaceAll(RegExp(r'\.0*$'), '');
  }

  static calcRate(int divisor, int dividend) {
    if (dividend != 0) {
      return ((100 * divisor) / dividend);
      // return ((100 * divisor) / dividend).toStringAsFixed(0);
    } else {
      return 0.0;
    }
  }

  /// 秒转时分秒
  static String second2HMS(int sec, {bool isEasy = false}) {
    String hms = "0";
    if (!isEasy) hms = "0秒";
    if (sec > 0) {
      int h = sec ~/ 3600;
      int m = (sec % 3600) ~/ 60;
      int s = sec % 60;
      if (h > 0) {
        hms = "$h时$m分$s秒";
      } else {
        if (m > 0) {
          hms = "$m分$s秒";
        } else {
          hms = "$s秒";
        }
      }
    }
    return hms;
  }

  static DateTime getWeekStartDate() {
    DateTime now = DateTime.now();
    int dayOfWeek = now.weekday; // 获取今天是周几（1代表周一，7代表周日）
    int diff = dayOfWeek - 1; // 计算今天距离周一的天数差
    if (diff < 0) {
      diff += 7; // 如果是周日，则需要加上一周的天数
    }
    return now.subtract(Duration(days: diff)); // 减去天数差，得到本周一的时间
  }

  static DateTime getWeekEndDate() {
    DateTime now = DateTime.now();
    int dayOfWeek = now.weekday; // 获取今天是周几
    int diff = 7 - dayOfWeek; // 计算今天距离周日的天数差
    if (diff == 0) {
      diff = 7; // 如果是周日，则加上一周的天数
    }
    return now.add(Duration(days: diff)); // 加上天数差减一，得到本周日的时间
  }

  static String getQuestionSource(int type) {
    var str = '';
    switch (type) {
      case 1:
        str = '预习';
        break;
      case 3:
        str = '复习';
        break;
      case 4:
        str = '作业';
        break;
      case 5:
        str = '考试';
        break;
    }
    return str;
  }
}

// 是否是平板
bool isPad([double mobilePhoneScale = 1.2]) {
  return ScreenUtil().scaleWidth > mobilePhoneScale;
}

void toUpState(Function(void Function()) setState, VoidCallback fn, bool mounted) {
  if (mounted) setState(fn);
}