//
//  ToastUtils.m
//  vsfa
//
//  Created by long on 15/7/29.
//  Copyright © 2015年 long. All rights reserved.
//

#import "ToastUtils.h"
#import "ZLDefine.h"

@implementation ToastUtils

#pragma mark - 显示提示视图
+ (void)showAtTop:(NSString *)message
{
    [self show:message atTop:YES showTime:2.0];
}

+ (void)show:(NSString *)message
{
    [self show:message atTop:NO showTime:2.0];
}

+ (void)showLongAtTop:(NSString *)message
{
    [self show:message atTop:YES showTime:4.0];
}

+ (void)showLong:(NSString *)message
{
    [self show:message atTop:NO showTime:4.0];
}

static UILabel *toastView = nil;
+ (void)show:(NSString *)message atTop:(BOOL)atTop showTime:(float)showTime
{
    if (![[NSThread currentThread] isMainThread]) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [self show:message atTop:atTop showTime:showTime];
        });
        return;
    }
    @synchronized(self){
        if (toastView == nil) {
            toastView = [[UILabel alloc] init];
            toastView.backgroundColor = [UIColor darkGrayColor];
            toastView.textColor = [UIColor whiteColor];
            toastView.font = [UIFont systemFontOfSize:17];
            toastView.layer.masksToBounds = YES;
            toastView.layer.cornerRadius = 3.0f;
            toastView.textAlignment = NSTextAlignmentCenter;
            toastView.alpha = 0;
            toastView.numberOfLines = 0;
            toastView.lineBreakMode = NSLineBreakByCharWrapping;
            [[UIApplication sharedApplication].keyWindow addSubview:toastView];
        }
    }
    if (toastView.superview != [UIApplication sharedApplication].keyWindow) {
        [toastView removeFromSuperview];
        [[UIApplication sharedApplication].keyWindow addSubview:toastView];
    }
    
    CGFloat screenWidth = [[UIScreen mainScreen] bounds].size.width;
    
    CGFloat width = [self stringText:message font:18 isHeightFixed:YES fixedValue:30];
    CGFloat height = 30;
    if (width > screenWidth - 20) {
        width = screenWidth - 20;
        height = [self stringText:message font:18 isHeightFixed:NO fixedValue:width];
    }
    
    CGRect frame = CGRectMake(([UIScreen mainScreen].bounds.size.width-width)/2, atTop?[UIScreen mainScreen].bounds.size.height*0.15:[UIScreen mainScreen].bounds.size.height*0.85, width, height);
    toastView.alpha = 1;
    toastView.text = message;
    toastView.frame = frame;
    [UIView animateWithDuration:showTime animations:^{
        toastView.alpha = 0;
    } completion:^(BOOL finished) {
    }];
}

//根据字符串长度获取对应的宽度或者高度
+ (CGFloat)stringText:(NSString *)text font:(CGFloat)font isHeightFixed:(BOOL)isHeightFixed fixedValue:(CGFloat)fixedValue
{
    CGSize size;
    if (isHeightFixed) {
        size = CGSizeMake(MAXFLOAT, fixedValue);
    } else {
        size = CGSizeMake(fixedValue, MAXFLOAT);
    }
    
    CGSize resultSize;
    //返回计算出的size
    resultSize = [text boundingRectWithSize:size options:NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesFontLeading | NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:font]} context:nil].size;
    
    if (isHeightFixed) {
        return resultSize.width;
    } else {
        return resultSize.height;
    }
}

@end
