//
//  BSAlertView.m
//  Unionpay
//
//  Created by Qing Xiubin on 13-8-7.
//  Copyright (c) 2013年 成都中信联通科技有限公司. All rights reserved.
//

#if !__has_feature(objc_arc)
#error This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
#endif

#define ALERT_TIME_DURATION     0.3f
#define ALERT_ALPHA_HIDE        0.0f
#define ALERT_ALPHA_SHOW        1.0f
#define ALERT_COLOR_HIDE        [UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:0.0f]
#define ALERT_COLOR_SHOW        [UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:0.3f]

#import "BSAlertView.h"
#import "IQKeyboardManager.h"

@interface AlertController : UIViewController

@end

@implementation AlertController

- (UIStatusBarStyle)preferredStatusBarStyle{
    return UIStatusBarStyleDefault;
}
- (BOOL)prefersStatusBarHidden{
    return NO;
}
- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation{
    return UIStatusBarAnimationFade;
}


-(BOOL)shouldAutorotate
{
    return YES;
}


-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}



@end


@interface BSAlertView ()
@property (assign, nonatomic) BOOL isShow;
@property (strong, nonatomic) UIWindow *alertWindow;
@property (strong, nonatomic) UIWindow *previousWindow;
@end

@implementation BSAlertView

- (instancetype)init{
    return [super initWithFrame:CGRectZero];
}

- (instancetype)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        [self awakeFromNib];
    }
    return self;
}

- (void)awakeFromNib{
    
    [super awakeFromNib];
    
    self.backgroundColor = [UIColor clearColor];
    self.autoresizingMask =
    UIViewAutoresizingFlexibleTopMargin|
    UIViewAutoresizingFlexibleBottomMargin|
    UIViewAutoresizingFlexibleLeftMargin|
    UIViewAutoresizingFlexibleRightMargin;
    
    //设置背景
    if (_bgImageView == nil) {
        _bgImageView = [[UIImageView alloc] initWithFrame:self.bounds];
        _bgImageView.autoresizingMask =
        UIViewAutoresizingFlexibleHeight|
        UIViewAutoresizingFlexibleWidth|
        UIViewAutoresizingFlexibleTopMargin|
        UIViewAutoresizingFlexibleBottomMargin|
        UIViewAutoresizingFlexibleLeftMargin|
        UIViewAutoresizingFlexibleRightMargin;
        [self insertSubview:_bgImageView atIndex:0];
    }
    _bgImageView.image = [UIImage stretchableImageNamed:@"common_middle_bg"];
    
    if (_gesture) {
        
    }
}

/**********************************************************************/
#pragma mark - Public Methods
/**********************************************************************/

- (void)show{
    return [self showWithAnimation:kAlertAnimationBottom];
}

- (void)bgViewTapAction:(UITapGestureRecognizer *)sender{
    [self dismiss];
}

- (void)showWithAnimation:(AlertAnimation)animation{
    if (_isShow == YES) {
        return;
    }
    _isShow = YES;
    
    //监听键盘
    [self observeKeyboard];
    
    //设置Window
    [self setPreviousWindow:[[UIApplication sharedApplication] keyWindow]];
    _alertWindow = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    [_alertWindow setWindowLevel:UIWindowLevelAlert];
    [_alertWindow setBackgroundColor:ALERT_COLOR_HIDE];
    
    AlertController *controller = [[AlertController alloc] init];
    [_alertWindow setRootViewController:controller];
	[_alertWindow.rootViewController.view addSubview:self];
    [_alertWindow makeKeyAndVisible];
    

    if (_gesture) {
        UIButton *bgButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [bgButton setFrame:controller.view.bounds];
        [bgButton setBackgroundColor:[UIColor clearColor]];
        [bgButton addTarget:self action:@selector(bgViewTapAction:) forControlEvents:UIControlEventTouchUpInside];
        [controller.view insertSubview:bgButton belowSubview:self];
    }
    
    
    //弹窗动画
    switch (animation) {
        case kAlertAnimationTop:
        case kAlertAnimationBottom:
        case kAlertAnimationLeft:
        case kAlertAnimationRight:{
            [self setAlpha:ALERT_ALPHA_SHOW];
            [self setCenter:[self centerWithAnimation:animation]];
            [UIView animateWithDuration:ALERT_TIME_DURATION delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
                [self setCenter:[self centerWithAnimation:kAlertAnimationNone]];
                [self.alertWindow setBackgroundColor:ALERT_COLOR_SHOW];
            } completion:nil];
        }break;
        case kAlertAnimationFade:{
            [self setAlpha:ALERT_ALPHA_HIDE];
            [self setCenter:[self centerWithAnimation:animation]];
            [UIView animateWithDuration:ALERT_TIME_DURATION delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
                [self setAlpha:ALERT_ALPHA_SHOW];
                [self.alertWindow setBackgroundColor:ALERT_COLOR_SHOW];
            } completion:nil];
        }break;
        case kAlertAnimationPop:{
            [self setAlpha:ALERT_ALPHA_HIDE];
            [self setCenter:[self centerWithAnimation:animation]];
            [UIView animateWithDuration:ALERT_TIME_DURATION delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
                [self setAlpha:ALERT_ALPHA_SHOW];
                [self.alertWindow setBackgroundColor:ALERT_COLOR_SHOW];
            } completion:nil];
            
            CAKeyframeAnimation *scaleAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];
            scaleAnimation.removedOnCompletion = YES;
            scaleAnimation.duration = ALERT_TIME_DURATION;
            scaleAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
            scaleAnimation.values = @[@0.01f,@1.1f,@0.9f,@1.0f];
            [self.layer addAnimation:scaleAnimation forKey:nil];
        }break;
        case kAlertAnimationNone:
        default:{
            [self setAlpha:ALERT_ALPHA_SHOW];
            [self setCenter:[self centerWithAnimation:kAlertAnimationNone]];
            [self.alertWindow setBackgroundColor:ALERT_COLOR_SHOW];
        }break;
    }
}

- (void)dismiss{
    return [self dismissWithAnimation:kAlertAnimationFade];
}
- (void)dismissWithAnimation:(AlertAnimation)animation{
    
    
    if (_isShow == NO) {
        return;
    }
    _isShow = NO;
    
    //隐藏键盘
    [self unObserveKeyboard];
	[self endEditing:YES];
    
    //恢复Window
    [self.previousWindow makeKeyWindow];
    
    //弹窗动画
    switch (animation) {
        case kAlertAnimationTop:
        case kAlertAnimationBottom:
        case kAlertAnimationLeft:
        case kAlertAnimationRight:{
            [UIView animateWithDuration:ALERT_TIME_DURATION delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
                [self setCenter:[self centerWithAnimation:animation]];
                [self.alertWindow setBackgroundColor:ALERT_COLOR_HIDE];
            } completion:^(BOOL finished) {
                [self removeFromSuperview];
            }];
        }break;
        case kAlertAnimationFade:
        case kAlertAnimationPop:{
            [UIView animateWithDuration:ALERT_TIME_DURATION delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
                [self setAlpha:ALERT_ALPHA_HIDE];
                [self.alertWindow setBackgroundColor:ALERT_COLOR_HIDE];
            } completion:^(BOOL finished) {
                [self removeFromSuperview];
            }];
        }break;
        case kAlertAnimationNone:
        default:{
            [self setAlpha:ALERT_ALPHA_HIDE];
            [self.alertWindow setBackgroundColor:ALERT_COLOR_HIDE];
            [self removeFromSuperview];
        }break;
    }
}

/**********************************************************************/
#pragma mark - Public Methods
/**********************************************************************/

- (BOOL)willShowKeyboard{
    if ([self firstResponder] == nil) {
        return NO;
    }
    return YES;
}

- (CGFloat)marginToBottom{
    return 255;
}

- (CGPoint)centerWithAnimation:(AlertAnimation)animation{
    CGRect bounds = self.window.rootViewController.view.bounds;
    CGPoint center = CGPointZero;
    switch (animation) {
        case kAlertAnimationTop:{
            center.x = bounds.size.width/2;
            center.y = 0-bounds.size.height/2;
        }break;
        case kAlertAnimationBottom:{
            center.x = bounds.size.width/2;
            center.y = bounds.size.height+self.bounds.size.height/2;
        }break;
        case kAlertAnimationLeft:{
            center.x = 0-bounds.size.width/2;
            if ([self willShowKeyboard]) {
                center.y = bounds.size.height-(self.bounds.size.height/2+[self marginToBottom]);
            } else {
                center.y = bounds.size.height/2;
            }
        }break;
        case kAlertAnimationRight:{
            center.x = bounds.size.width+bounds.size.width/2;
            if ([self willShowKeyboard]) {
                center.y = bounds.size.height-(self.bounds.size.height/2+[self marginToBottom]);
            } else {
                center.y = bounds.size.height/2;
            }
        }break;
        case kAlertAnimationFade:
        case kAlertAnimationPop:
        case kAlertAnimationNone:
        default:{
            center.x = bounds.size.width/2;
            if ([self willShowKeyboard]) {
                center.y = bounds.size.height-(self.bounds.size.height/2+[self marginToBottom]);
            } else {
                center.y = bounds.size.height/2;
            }
        }break;
    }
    
    return center;
}

/**********************************************************************/
#pragma mark - UIKeyboard
/**********************************************************************/

- (void)keyboardWillShow:(CGRect)frame duration:(NSTimeInterval)duration curve:(NSUInteger)curve{
    if (_isShow) {
        CGRect bounds = self.window.rootViewController.view.bounds;
        CGPoint center = self.center;
        center.y = bounds.size.height-(self.bounds.size.height/2+[self marginToBottom]);
        
        [UIView animateWithDuration:duration delay:0 options:curve animations:^{
            [self setCenter:center];
        } completion:nil];
    }
}

- (void)keyboardWillHide:(CGRect)frame duration:(NSTimeInterval)duration curve:(NSUInteger)curve{
    if (_isShow) {
        CGRect bounds = self.window.rootViewController.view.bounds;
        CGPoint center = self.center;
        center.y = bounds.size.height/2;
        
        [UIView animateWithDuration:duration delay:0 options:curve animations:^{
            [self setCenter:center];
        } completion:nil];
    }
}

@end