//
//  YMCalendarUtils.m
//  MSYOUPAI
//
//  Created by YoMi on 2024/3/3.
//  Copyright © 2024 MS. All rights reserved.
//

#import "YMCalendarUtils.h"

@interface YMCalendarUtils ()
@property (nonatomic, strong) NSCalendar *calendar;
@property (nonatomic, strong) NSCalendar *currentCalendar;
@property (nonatomic, strong) NSCalendar *chineseCalendar;
@property (nonatomic, strong) NSCalendar *gregorianCalendar;

@end

@implementation YMCalendarUtils

#pragma mark -- 单例
static YMCalendarUtils *_instance;
+ (instancetype)allocWithZone:(struct _NSZone *)zone {
    
    // 也可以使用一次性代码
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        if (_instance == nil) {
            _instance = [super allocWithZone:zone];
        }
    });
    return _instance;
}

+ (instancetype)shareCalender {
    return [[self alloc]init];
}

- (id)copyWithZone:(NSZone *)zone {
    return _instance;
}

- (id)mutableCopyWithZone:(NSZone *)zone {
    return _instance;
}

- (NSCalendar *)gregorianCalendar {
    if (!_gregorianCalendar) {
        _gregorianCalendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    }
    return _gregorianCalendar;
}

- (NSCalendar *)currentCalendar {
    if (!_currentCalendar) {
        _currentCalendar = [NSCalendar currentCalendar];
    }
    return _currentCalendar;
}

- (NSCalendar *)chineseCalendar{
    if (!_chineseCalendar) {
        _chineseCalendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierChinese];
    }
    return _chineseCalendar;
}

#pragma mark --与农历相关
- (NSString *)calendarIdentifierChineseWithDate:(NSDate *)date {
    NSString *chineseDateStr = @"";
    NSCalendarUnit unit = NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear;
    NSDateComponents *com = [self.chineseCalendar components:unit fromDate:date];
    
    NSInteger day = com.day;
    NSInteger month = com.month;
    NSInteger year = com.year;
    
    chineseDateStr = [NSString stringWithFormat:@"%ld-%ld-%ld",(long)year,(long)month,(long)day];
    
    
    return chineseDateStr;
    
}


#pragma mark -- 与NSCalendar相关
// 获取当前月份的天数
- (NSInteger)getCurrentMonthForDays {
    NSInteger dayNumber = 0;
    
    NSRange range = [self.currentCalendar rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:[NSDate date]];
    
    dayNumber = range.length;
    
    return dayNumber;
}


// 获取目标月份的天数
- (NSInteger)getNextNMonthForDays:(NSDate *)date{
    NSCalendar * calendar = [NSCalendar currentCalendar];
    // 调用rangeOfUnit方法:(返回一样是一个结构体)两个参数一个大单位，一个小单位(.length就是天数，.location就是月)
    NSInteger monthNum = [calendar rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:date].length;
    return monthNum;
}

- (NSInteger)getSumOfDaysForYear:(NSString *)year month:(NSString *)month {
    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
    
    [formatter setDateFormat:@"yyyy-MM"]; // 年-月
    
    NSString * dateStr = [NSString stringWithFormat:@"%@-%@",year,month];
    
    NSDate * date = [formatter dateFromString:dateStr];
    
    //
    NSCalendar * calendar = self.gregorianCalendar;
    
    NSRange range = [calendar rangeOfUnit:NSCalendarUnitDay
                                   inUnit: NSCalendarUnitMonth
                                  forDate:date];
    return range.length;
}

// 获取某个月的1号的 date 对象
- (NSDate *)getAMonthframDate:(NSDate*)date {
    NSCalendar * calendar = [NSCalendar currentCalendar];
    
    // 指定日历单位，如日期和月份。(这里指定了年月日，还有其他字段添加单位.特别齐全 ：世纪，年月日时分秒等等等)
    NSCalendarUnit dayInfoUnits  = NSCalendarUnitEra | NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;
    
    // NSDateComponents封装了日期的组件,年月日时分秒等(个人感觉像是平时用的model模型)
    NSDateComponents *components = [calendar components: dayInfoUnits fromDate:date];
    // 指定1号
    components.day = 1;

    // 转成需要的date对象return
    NSDate * nextMonthDate =[calendar dateFromComponents:components];
    return nextMonthDate;
}

// 获取某个月的1号是星期几
- (NSString *)getFirstDayWeekForMonth:(NSDate *)date {
    NSInteger weekDay = 0;
    NSArray *weekStr = @[@"星期日",@"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六"];
    //获取公历日历
    NSCalendar *calendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];
    weekDay = components.weekday;
    
    weekDay--;
    
    return weekStr[weekDay];
    
    
}

// 获取某个月的某天是星期几
- (NSUInteger )getFirstDayWeekIntergerForMonth:(NSDate *)date{
    NSUInteger weekDay = 0;
//    NSArray *weekStr = @[@"星期日",@"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六"];
    //获取公历日历
    NSCalendar *calendar = self.gregorianCalendar;
    
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];
    weekDay = components.weekday;
    
    weekDay--;
    
    return weekDay;

}


#pragma mark -- 与时间NSDate相关
- (NSString *)getCurrentTimeWithHourMinSecond:(BOOL)flag{
    NSDateFormatter * formatter = [[NSDateFormatter alloc]init];
    // 格式化系统时间字符串</code>
    if (flag) {
        
        [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    } else {
        [formatter setDateFormat:@"yyyy-MM-dd"];

    }
    NSString * time = [formatter stringFromDate:[NSDate date]];
    return time;
}

- (int)getYear{
    NSCalendar *calendar = self.currentCalendar;
    NSUInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:[NSDate date]];
    return (int)dateComponent.year;
    
}

- (int)getMonth{
    NSCalendar *calendar = self.currentCalendar;
    NSUInteger unitFlags =  NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:[NSDate date]];
    return (int)dateComponent.month;
}

- (int)getDay{
    NSCalendar *calendar = self.currentCalendar;
    NSUInteger unitFlags =  NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:[NSDate date]];
    return (int)dateComponent.day;
}

- (int)getHour{
    NSCalendar *calendar = self.currentCalendar;
    NSUInteger unitFlags =  NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:[NSDate date]];
    return (int)dateComponent.hour;
}

- (int)getMinute{
    NSCalendar *calendar = self.currentCalendar;
    NSUInteger unitFlags =  NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:[NSDate date]];
    return (int)dateComponent.minute;
}

- (int)getSecond{
    NSCalendar *calendar = self.currentCalendar;
    NSUInteger unitFlags =  NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:[NSDate date]];
    return (int)dateComponent.second;
}

- (NSInteger)getYearWithDate:(NSDate *)date{
    NSCalendar *calendar = self.gregorianCalendar;
    
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];

    return components.year;
    
}

- (NSInteger)getMonthWithDate:(NSDate *)date{
    NSCalendar *calendar = self.gregorianCalendar;
    
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];
    
    return components.month;
}

- (NSInteger)getDayWithDate:(NSDate *)date{
    NSCalendar *calendar = self.gregorianCalendar;
    
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];
    
    return components.day;
}

- (NSInteger)getHourWithDate:(NSDate *)date{
    NSCalendar *calendar = self.gregorianCalendar;
    
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];
    
    return components.hour;
}

- (NSInteger)getMinuteWithDate:(NSDate *)date{
    NSCalendar *calendar = self.gregorianCalendar;
    
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];
    
    return components.minute;
}

- (NSInteger)getSecondWithDate:(NSDate *)date{
    NSCalendar *calendar = self.gregorianCalendar;
    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitWeekday;
    NSDateComponents *components = [calendar components:unit fromDate:date];
    return components.second;
}


- (NSTimeInterval )timeIntervalWithDateStr:(NSString *)dateStr dateStrFormatterStr:(NSString *)formatterStr {
    NSDate *date = [self dateWithDateStr:dateStr dateStrFormatterStr:formatterStr];
    NSTimeInterval timeInterval = [date timeIntervalSince1970];
    return timeInterval;
}

// 字符串时间 -->  NSDate
- (NSDate *)dateWithDateStr:(NSString *)dateStr dateStrFormatterStr:(NSString *)formatterStr {
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
    [formatter setDateFormat:formatterStr];
    NSDate *date = [formatter dateFromString:dateStr];
    
    return date;
    
}

// NSDate --> 字符串时间
- (NSString *)dateStrWithDate:(NSDate *)date dateStrFormatterStr:(NSString *)formatterStr {
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
    [formatter setDateFormat:formatterStr];
    NSString *dateStr = [formatter stringFromDate:date];
    
    return dateStr;
}

// 当前时间与指定时间的间隔
- (NSString *)getStandardTimeInterval:(NSTimeInterval)interval{

    //当前时间与1970时间戳(秒为单位)
    NSTimeInterval time = [[NSDate date] timeIntervalSince1970];
    
    // 当前时间戳-传入的时间戳=差值(比如朋友圈动态发表时间为10分钟前(当前时间-发表时间))
    NSTimeInterval timeInterval = time-interval;
    //计算出天、小时、分钟
    int day = timeInterval/(60*60*24);
    int hour = ((long)timeInterval%(60*60*24))/(60*60);
    int minite = ((long)timeInterval%(60*60*24))%(60*60)/60;
    NSMutableString * timeStr = [[NSMutableString alloc]init];
    // 逻辑判断
    if (day!=0) {
        [timeStr appendString:[NSString stringWithFormat:@"%d天",day]];
    }else{
        if (hour!=0) {
            [timeStr appendString:[NSString stringWithFormat:@"%d小时",hour]];
        }else{
            if (minite<1) {
                [timeStr appendString:@"刚刚"];
            }else{
                [timeStr appendString:[NSString stringWithFormat:@"%d分钟",minite]];
            }
        }
    }
    return timeStr;
}

// 当前时间与指定时间的间隔(返回分钟)
- (NSInteger )getDifferenceMinWithTimeInterval:(NSTimeInterval)interval{
    //当前时间与1970时间戳(秒为单位)
    NSTimeInterval time = [[NSDate date] timeIntervalSince1970];
    
    // 当前时间戳-传入的时间戳=差值(比如朋友圈动态发表时间为10分钟前(当前时间-发表时间))
    NSTimeInterval timeInterval = time - interval;
//    if (time > interval) {
//        timeInterval = fabs(time - interval);
//
//    } else {
//        timeInterval = fabs(interval - time);
//
//    }
    //计算分
    NSInteger minite = (long)timeInterval/60;
    
    return minite;
}



- (NSInteger)numberOfDaysWithFromDate:(NSDate *)fromDate toDate:(NSDate *)toDate{
       NSCalendar *calendar = self.gregorianCalendar;
  
    NSDateComponents *comp = [calendar components:NSCalendarUnitDay fromDate:fromDate toDate:toDate options:NSCalendarWrapComponents];
    
       return comp.day;
   }

/**
 计算当前日期的前一天或者后一天
 
 @param later 是否计算后一天
 @param currentDateStr 当期的日期
 @return 返回计算后的字符串
 */
- (NSString *)calculateMonthDay:(BOOL)later withCurrentDateStr:(NSString *)currentDateStr {
    NSInteger second = 0;
    if (later) {//后一天
        second = 24*60*60;
    } else {
        second = - 24* 60 * 60;
    }
    NSCalendar *calendar = self.currentCalendar;
    NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
    [inputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]];
    [inputFormatter setDateFormat:@"yyyy-MM-dd"];
    NSDate *inputDate = [inputFormatter dateFromString:currentDateStr];
    NSDate *nextDate = [NSDate dateWithTimeInterval:second sinceDate:inputDate];
    NSDateComponents *comps = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitWeekday|NSCalendarUnitDay fromDate:nextDate];
    
    NSString *month = comps.month > 9 ? [NSString stringWithFormat:@"%ld",(long)comps.month]:[NSString stringWithFormat:@"0%ld",(long)comps.month];
    NSString *day = comps.day > 9 ?[NSString stringWithFormat:@"%ld",(long)comps.day]:[NSString stringWithFormat:@"0%ld",(long)comps.day];
    NSString *currentDate = [NSString stringWithFormat:@"%ld-%@-%@",(long)comps.year,month,day];
    return currentDate;
}

/**
 计算前一天或者后一天
 
 @param later 是否是后一天
 @param currentDateStr 要计算的日期
 @return 返回的日期字典key:year、month、day
 */
- (NSDictionary *)calculateDate:(BOOL)later withCurrentDateStr:(NSString *)currentDateStr {
    NSInteger second = 0;
    if (later) {//后一天
        second = 24*60*60;
    } else {
        second = -24*60*60;
    }
    NSCalendar *calendar = self.currentCalendar;
    NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
    [inputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]];
    [inputFormatter setDateFormat:@"yyyy-MM-dd"];
    NSDate *inputDate = [inputFormatter dateFromString:currentDateStr];
    NSDate *nextDate = [NSDate dateWithTimeInterval:second sinceDate:inputDate];
    NSDateComponents *comps = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitWeekday|NSCalendarUnitDay fromDate:nextDate];
    
    NSString *month = comps.month > 9 ? [NSString stringWithFormat:@"%ld",(long)comps.month]:[NSString stringWithFormat:@"0%ld",(long)comps.month];
    NSString *day = comps.day > 9 ?[NSString stringWithFormat:@"%ld",(long)comps.day]:[NSString stringWithFormat:@"0%ld",(long)comps.day];
    NSDictionary *resultDic = @{@"year":@(comps.year),@"month":month,@"day":day};
    return resultDic;
}

- (BOOL)isTodayWithDate:(NSDate *)date{
    
    NSCalendar *calendar = [NSCalendar currentCalendar];
    
    int unit = NSCalendarUnitDay | NSCalendarUnitMonth |  NSCalendarUnitYear;
    
    
    
    // 1.获得当前时间的年月日
    
    NSDateComponents *nowCmps = [calendar components:unit fromDate:[NSDate date]];
    
    
    
    // 2.获得self的年月日
    
    NSDateComponents *selfCmps = [calendar components:unit fromDate:date];
    
    return
    
    (selfCmps.year == nowCmps.year) &&
    
    (selfCmps.month == nowCmps.month) &&
    
    (selfCmps.day == nowCmps.day);
    
}

/**
 获取 当前时间的时间戳
 @return 返回的时间戳
 */
- (NSTimeInterval )currentTimeInterval {
    
    
    return [self timeIntervalWithDateStr:[self getCurrentTimeWithHourMinSecond:YES] dateStrFormatterStr:@"yyyy-MM-dd HH:mm:ss"];
}


@end