ABVolumeHUDManager.m

//
//  ABVolumeHUDManager.m
//  Ultrasound
//
//  Created by Ayden Panhuyzen on 8/27/18.
//  Copyright © 2018 Ayden Panhuyzen. All rights reserved.
//

#import "ABVolumeHUDManager.h"
#import "ABVolumeHUDContainerViewController.h"
#import "ABVolumeHUDThemeDark.h"
#import "ABVolumeHUDThemeExtraLight.h"

@implementation ABVolumeHUDManager {
    ABVolumeHUDContainerViewController *viewController;
    BOOL oledModeForHUDCreation;
}

+ (instancetype)sharedManager {
    static ABVolumeHUDManager *sharedManager = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedManager = [[self alloc] init];
    });
    return sharedManager;
}

- (void)createViewIfDoesntExist {
    if (![NSThread isMainThread]) return [self performSelectorOnMainThread:@selector(createViewIfDoesntExist) withObject:nil waitUntilDone:YES];
    if (viewController != nil || _targetView == nil) return;
    
    viewController = [[ABVolumeHUDContainerViewController alloc] init];
    viewController.containerView.effectiveOrientation = _orientation;
    viewController.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    
    [viewController.containerView setOLEDMode:oledModeForHUDCreation animated:NO];
    oledModeForHUDCreation = NO;
    
    if ([_targetView isKindOfClass:[UIWindow class]]) ((UIWindow *)_targetView).rootViewController = viewController;
    else [_targetView addSubview:viewController.view];
}

- (void)destroyView {
    if (viewController == nil) return;
    if ([_targetView isKindOfClass:[UIWindow class]]) ((UIWindow *)_targetView).rootViewController = nil;
    else [viewController.view removeFromSuperview];
    viewController = nil;
}

- (void)setTargetView:(UIView *)targetView {
    [self destroyView];
    _targetView = targetView;
}

- (ABVolumeHUDVisibilityManager *)visibilityManager {
    [self createViewIfDoesntExist];
    return viewController.containerView.visibilityManager;
}

- (void)volumeChangedTo:(CGFloat)volume withMode:(ABVolumeHUDVolumeMode)mode {
    [self createViewIfDoesntExist];
    // If the HUD view still doesn't exist, just cancel.
    if (viewController == nil) return;

    [viewController.containerView volumeChangedTo:volume withMode:mode];
}

- (void)volumeChangedTo:(CGFloat)volume {
    [self volumeChangedTo:volume withMode:0];
}

- (BOOL)oledMode {
    if (viewController == nil) return NO;
    return viewController.containerView.oledMode;
}

- (void)setOLEDMode:(BOOL)oledMode {
    if (viewController == nil) {
        oledModeForHUDCreation = oledMode;
        return;
    }
    viewController.containerView.oledMode = oledMode;
}

- (NSObject <ABVolumeHUDTheme>*)theme {
    if (@available(iOS 13.0, *)) {
        if ([UIScreen mainScreen].traitCollection.userInterfaceStyle == UIUserInterfaceStyleDark && _darkModeTheme) return _darkModeTheme;
    }
    if (!_lightModeTheme) _lightModeTheme = [[ABVolumeHUDThemeDark alloc] init];
    return _lightModeTheme;
}

- (void)setLightModeTheme:(NSObject<ABVolumeHUDTheme> *)theme {
    BOOL isChanged = _lightModeTheme != theme;
    _lightModeTheme = theme;
    [[NSNotificationCenter defaultCenter] postNotificationName:kThemeSettingsChangedNotification object:nil userInfo:@{@"animated": @(isChanged)}];
}

- (void)setDarkModeTheme:(NSObject<ABVolumeHUDTheme> *)theme {
    BOOL isChanged = _darkModeTheme != theme;
    _darkModeTheme = theme;
    [[NSNotificationCenter defaultCenter] postNotificationName:kThemeSettingsChangedNotification object:nil userInfo:@{@"animated": @(isChanged)}];
}

- (void)setOrientation:(UIInterfaceOrientation)orientation {
    _orientation = orientation;
    if (viewController) viewController.containerView.effectiveOrientation = orientation;
}

@end