//
//  NSDate+Extension.m
//  YZCCalender
//
//  Created by Jason on 2018/1/17.
//  Copyright © 2018年 jason. All rights reserved.
//

#import "NSDate+Extension.h"

@implementation NSDate (Extension)
#pragma mark -- 获取日
+ (NSInteger)day:(NSString *)date {
    NSDateFormatter  *dateFormatter = [[self class] setDataFormatter];
    NSDate           *startDate     = [dateFormatter dateFromString:date];
    NSDateComponents *components    = [[NSCalendar currentCalendar] components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:startDate];
    
    return components.day;
}

#pragma mark -- 获取月
+ (NSInteger)month:(NSString *)date {
    NSDateFormatter  *dateFormatter = [[self class] setDataFormatter];
    NSDate           *startDate     = [dateFormatter dateFromString:date];
    NSDateComponents *components    = [[NSCalendar currentCalendar] components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:startDate];
    
    return components.month;
}

#pragma mark -- 获取年
+ (NSInteger)year:(NSString *)date {
    NSDateFormatter  *dateFormatter = [[self class] setDataFormatter];
    NSDate           *startDate     = [dateFormatter dateFromString:date];
    NSDateComponents *components    = [[NSCalendar currentCalendar] components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:startDate];
    
    return components.year;
}

#pragma mark -- 获得当前月份第一天星期几
+ (NSInteger)firstWeekdayInThisMonth:(NSDate *)date {
    NSCalendar *calendar = [NSCalendar currentCalendar];
    
    //设置每周的第一天从周几开始,默认为1,从周日开始
    [calendar setFirstWeekday:1];//1.Sun. 2.Mon. 3.Thes. 4.Wed. 5.Thur. 6.Fri. 7.Sat.
    NSDateComponents *comp = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:date];
    [comp setDay:1];
    NSDate     *firstDayOfMonthDate = [calendar dateFromComponents:comp];
    NSUInteger firstWeekday         = [calendar ordinalityOfUnit:NSCalendarUnitWeekday inUnit:NSCalendarUnitWeekOfMonth forDate:firstDayOfMonthDate];
    //若设置从周日开始算起则需要减一,若从周一开始算起则不需要减
    return firstWeekday - 1;
}

#pragma mark -- 获取当前月共有多少天
+ (NSInteger)totaldaysInMonth:(NSDate *)date {
    NSRange daysInLastMonth = [[NSCalendar currentCalendar] rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:date];
    
    return daysInLastMonth.length;
}

#pragma mark -- 获取日期
+ (NSString *)timeStringWithInterval:(NSTimeInterval)timeInterval {
    NSDateFormatter *dateFormatter = [[self class] setDataFormatter];
    NSDate          *date          = [NSDate dateWithTimeIntervalSince1970:timeInterval];
    NSString        *dateString    = [dateFormatter stringFromDate:date];
    
    return dateString;
}

#pragma mark -- 设置日期格式
+ (NSDateFormatter *)setDataFormatter {
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];
    [dateFormatter setLocale:[NSLocale currentLocale]];
    return dateFormatter;
}

#pragma mark -- 计算两个日期之间相差天数
+ (NSDateComponents *)calcDaysbetweenDate:(NSString *)startDateStr endDateStr:(NSString *)endDateStr {
    NSDateFormatter *dateFormatter = [[self class] setDataFormatter];
    NSDate          *startDate     = [dateFormatter dateFromString:startDateStr];
    NSDate          *endDate       = [dateFormatter dateFromString:endDateStr];
    
    //利用NSCalendar比较日期的差异
    NSCalendar *calendar = [NSCalendar currentCalendar];
    /**
     * 要比较的时间单位,常用如下,可以同时传：
     *    NSCalendarUnitDay : 天
     *    NSCalendarUnitYear : 年
     *    NSCalendarUnitMonth : 月
     *    NSCalendarUnitHour : 时
     *    NSCalendarUnitMinute : 分
     *    NSCalendarUnitSecond : 秒
     */
    NSCalendarUnit unit = NSCalendarUnitDay | NSCalendarUnitMonth;
    
    NSDateComponents *delta = [calendar components:unit fromDate:startDate toDate:endDate options:0];
    
    return delta;
}

+ (NSTimeInterval)timeIntervalFromDateString:(NSString *)dateString {
    static NSDateFormatter *dateFormatter = nil;
    
    if (dateFormatter == nil) {
        dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
        [dateFormatter setLocale:[NSLocale currentLocale]];
    }
    
    NSDate         *date    = [dateFormatter dateFromString:dateString];
    NSTimeInterval interval = [date timeIntervalSince1970];
    
    return interval;
}


+ (BOOL)isToday:(NSString *)date {
    BOOL isToday = NO;
    NSString *today = [NSDate timeStringWithInterval:[NSDate date].timeIntervalSince1970];
    if ([date isEqualToString:today]) {
        isToday = YES;
    }
    return isToday;
}

+ (BOOL)isEqualBetweenWithDate:(NSString *)date toDate:(NSString *)toDate {
    BOOL isToday = NO;
    if ([toDate isEqualToString:date]) {
        isToday = YES;
    }
    return isToday;
}

+ (BOOL)isCurrenMonth:(NSString *)date {
    BOOL isCurrenMonth = NO;
    NSString *month = [[NSDate timeStringWithInterval:[NSDate date].timeIntervalSince1970] substringWithRange:NSMakeRange(0, 7)];
    
    if ([date isEqualToString:month]) {
        isCurrenMonth = YES;
    }
    return isCurrenMonth;
}
+ (BOOL)isCurrenYear:(NSString *)date{
    BOOL isCurrenYear = NO;
    NSString *year = [[NSDate timeStringWithInterval:[NSDate date].timeIntervalSince1970] substringWithRange:NSMakeRange(0, 4)];
    
    if ([date isEqualToString:year]) {
        isCurrenYear = YES;
    }
    return isCurrenYear;
}
+ (NSString *)getTimeWihtDate:(NSString *)date
{
    //    NSLog(@"日：%@",[date substringWithRange:NSMakeRange(11, 5)]);
    //    NSLog(@"月：%@",[date substringWithRange:NSMakeRange(5, 5)]);
    //    NSLog(@"年：%@",[date substringWithRange:NSMakeRange(0, 10)]);
    //    date = @"2017-11-10 09:11:11";
    if ([[date substringWithRange:NSMakeRange(0, 10)] isEqualToString:[NSDate timeStringWithInterval:[NSDate date].timeIntervalSince1970]]) {
        return [date substringWithRange:NSMakeRange(11, 5)];
    }else if([[date substringWithRange:NSMakeRange(0, 7)] isEqualToString:[[NSDate timeStringWithInterval:[NSDate date].timeIntervalSince1970] substringWithRange:NSMakeRange(0, 7)]]){
        return [date substringWithRange:NSMakeRange(5, 5)];
    }else{
        return [date substringWithRange:NSMakeRange(0, 10)];
    }
}
+ (NSString *)getTimeStringAutoShort2:(NSString *)date{
    if ([date isKindOfClass:[NSNull class]] || date == nil) {
        return @"";
    }else{
        if (date.length == 0) {
            return @"";
        }
    }
    NSDate * dt = [self getStringDate:date format:@"yyyy-MM-dd HH:mm:ss"];
    NSString * ret = nil;
    NSCalendar * calendar = [NSCalendar currentCalendar];
    // 当前时间
    NSDate * currentDate = [NSDate date];
    NSDateComponents * curComponents = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:currentDate];
    NSInteger currentYear = [curComponents year];
    NSInteger currentMonth = [curComponents month];
    NSInteger currentDay = [curComponents day];
    // 目标判断时间
    NSDateComponents*srcComponents = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:dt];
    NSInteger srcYear = [srcComponents year];
    NSInteger srcMonth = [srcComponents month];
    NSInteger srcDay = [srcComponents day];
    // 要额外显示的时间分钟
    if(currentYear == srcYear) {
        long currentTimestamp = [self getIOSTimeStamp:currentDate];
        long srcTimestamp = [self getIOSTimeStamp:dt];
        // 相差时间（单位：秒）
        long delta = currentTimestamp - srcTimestamp;
        // 当天（月份和日期一致才是）
        if(currentMonth == srcMonth && currentDay == srcDay) {
            // 时间相差60秒以内
            if(delta < 60){
                ret = @"刚刚";
            }else if (delta < 60 * 60){
                ret = [NSString stringWithFormat:@"%ld分钟前",(long)delta/60];
            }else{
                ret = [NSString stringWithFormat:@"%ld小时前",(long)delta/60/60];
            }
        }else{
            ret = [self getTimeString:dt format:@"MM-dd HH:mm"];
        }
    }else{/// 往年 2020-12-21
        ret = [self getTimeString:dt format:@"yyyy-MM-dd"];
    }
    return ret;
}
+ (NSString *)getTimeStringAutoShort3:(NSString *)date{
    if ([date isKindOfClass:[NSNull class]] || date == nil) {
        return @"";
    }else{
        if (date.length == 0) {
            return @"";
        }
    }
    NSDate * dt = [self getStringDate:date format:@"yyyy-MM-dd HH:mm:ss"];
    NSString * ret = [self getTimeString:dt format:@"yyyy-MM-dd"];
    return ret;
}
+ (NSString *)getTimeString:(NSDate *)dt format:(NSString *)fmt{
    NSDateFormatter* format = [[NSDateFormatter alloc] init];
    [format setDateFormat:fmt];
    return [format stringFromDate:[NSDate dateWithTimeIntervalSince1970:[dt timeIntervalSince1970]]];
}
+ (NSDate *)getStringDate:(NSString *)date format:(NSString *)fmt{
    NSDateFormatter* format = [[NSDateFormatter alloc] init];
    [format setDateFormat:fmt];
    return [format dateFromString:date];
}
+ (long)getIOSTimeStamp:(NSDate*)dat{
    long a = [dat timeIntervalSince1970];
    return a;
}

+ (long)getIOSTimeStamp_l:(NSDate*)dat{
    return[[NSNumber numberWithDouble:[self getIOSTimeStamp:dat]] longValue];
}
+ (NSString *)getCHtimeWihtDate:(NSString *)date
{
    NSDate * dt = [self getStringDate:date format:@"yyyy-MM-dd HH:mm:ss"];
    NSString * ret = nil;
    NSCalendar * calendar = [NSCalendar currentCalendar];
    // 当前时间
    NSDate * currentDate = [NSDate date];
    NSDateComponents * curComponents = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:currentDate];
    NSInteger currentYear = [curComponents year];
    // 目标判断时间
    NSDateComponents*srcComponents = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:dt];
    NSInteger srcYear = [srcComponents year];
    // 要额外显示的时间分钟
    // 当年
    if(currentYear == srcYear) {
        ret = [self getTimeString:dt format:@"MM-dd HH:mm"];
    }else{/// 往年 2020-12-21
        ret = [self getTimeString:dt format:@"yyyy-MM-dd HH:mm"];
    }
    return ret;
}
+ (NSString *)getDayWihtDate:(NSString *)date
{
    NSDate * dt = [self getStringDate:date format:@"yyyy-MM-dd HH:mm:ss"];
    NSString * ret = [self getTimeString:dt format:@"MM-dd"];
    return ret;
}
+ (NSString *)getMonthAndDayWihtDate:(NSString *)date
{
    NSDate * dt = [self getStringDate:date format:@"yyyy-MM-dd HH:mm:ss"];
    NSString * ret = nil;
    NSCalendar * calendar = [NSCalendar currentCalendar];
    // 当前时间
    NSDate * currentDate = [NSDate date];
    NSDateComponents * curComponents = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:currentDate];
    NSInteger currentYear = [curComponents year];
    NSInteger currentMonth = [curComponents month];
    NSInteger currentDay = [curComponents day];
    // 目标判断时间
    NSDateComponents*srcComponents = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday fromDate:dt];
    NSInteger srcYear = [srcComponents year];
    NSInteger srcMonth = [srcComponents month];
    NSInteger srcDay = [srcComponents day];
    // 要额外显示的时间分钟
    if(currentYear == srcYear) {
        long currentTimestamp = [self getIOSTimeStamp:currentDate];
        long srcTimestamp = [self getIOSTimeStamp:dt];
        // 相差时间（单位：秒）
        long delta = currentTimestamp - srcTimestamp;
        // 当天（月份和日期一致才是）
        if(currentMonth == srcMonth && currentDay == srcDay) {
            // 时间相差60秒以内
            ret = @"今天";
        }else if(delta > 60 * 60 * 24 && delta <  60 * 60 * 48) {
            ret = @"昨天";
        }else{
            ret = [self getTimeString:dt format:@"MM-dd"];
        }
    }else{/// 往年 2020-12-21
        ret = [self getTimeString:dt format:@"MM-dd"];
    }
    return ret;
}
@end