//
//  FLEXManager.m
//  Flipboard
//
//  Created by Ryan Olson on 4/4/14.
//  Copyright (c) 2020 FLEX Team. All rights reserved.
//

#import "FLEXManager.h"
#import "FLEXUtility.h"
#import "FLEXExplorerViewController.h"
#import "FLEXWindow.h"
#import "FLEXObjectExplorerViewController.h"
#import "FLEXFileBrowserController.h"
#import "NSObject+FLEX_Reflection.h"

@interface FLEXManager () <FLEXWindowEventDelegate, FLEXExplorerViewControllerDelegate>

@property (nonatomic, readonly, getter=isHidden) BOOL hidden;

@property (nonatomic) FLEXWindow *explorerWindow;
@property (nonatomic) FLEXExplorerViewController *explorerViewController;

@property (nonatomic, readonly) NSMutableArray<FLEXGlobalsEntry *> *userGlobalEntries;
@property (nonatomic, readonly) NSMutableDictionary<NSString *, FLEXCustomContentViewerFuture> *customContentTypeViewers;

@end

@implementation FLEXManager

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

- (instancetype)init {
    self = [super init];
    if (self) {
        _userGlobalEntries = [NSMutableArray new];
        _customContentTypeViewers = [NSMutableDictionary new];
    }
    return self;
}

- (FLEXWindow *)explorerWindow {
    NSAssert(NSThread.isMainThread, @"You must use %@ from the main thread only.", NSStringFromClass([self class]));
    
    if (!_explorerWindow) {
        _explorerWindow = [[FLEXWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
        _explorerWindow.eventDelegate = self;
        _explorerWindow.rootViewController = self.explorerViewController;
    }
    
    return _explorerWindow;
}

- (void)showHintsIfNecessary {
    BOOL dontShowHints = [[NSUserDefaults standardUserDefaults] boolForKey:@"DontShowHintsOnLaunch"];
    if (!dontShowHints){
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [self showHintsAlert];
        });
    }
}

- (void)showHintsAlert {
    
    UIAlertController *alertController = [UIAlertController
                                          alertControllerWithTitle:@"Usage Guide"
                                          message:@"Triple tap 'Play/Pause' to toggle explorer view visibility.\nIn selection mode 'Menu' will re-enable the toolbar, and a long press on 'Select', 'Play/Pause' or a 'Right siri tap' triggers a contextual menu for view info & movement.\nBrowsing object details long press on 'Select' or a 'Right siri tap' triggers a detail editor.\nInjecting into HeadBoard BREAKS SIRI REMOTE. Suggest AirMagic to navigate."
                                          preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *hideForeverAction = [UIAlertAction
                                        actionWithTitle:@"Don't Show This Again"
                                        style:UIAlertActionStyleDestructive
                                        handler:^(UIAlertAction *action)
                                        {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"DontShowHintsOnLaunch"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        [self showExplorer];
    }];
    UIAlertAction *showForeverAction = [UIAlertAction
                                        actionWithTitle:@"Always Show On Launch"
                                        style:UIAlertActionStyleDestructive
                                        handler:^(UIAlertAction *action)
                                        {
        [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"DontShowHintsOnLaunch"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        [self showExplorer];
    }];
    UIAlertAction *cancelAction = [UIAlertAction
                                   actionWithTitle:@"Dismiss"
                                   style:UIAlertActionStyleCancel
                                   handler:^(UIAlertAction *action)
                                   {
        [self showExplorer];
    }];
    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"DontShowHintsOnLaunch"]) {
        [alertController addAction:showForeverAction];
    }
    else {
        [alertController addAction:hideForeverAction];
    }
    [alertController addAction:cancelAction];
    
    #if TARGET_OS_TV
    [[self topViewController] presentViewController:alertController animated:YES completion:nil];
    #endif
}

- (void)tripleTap:(UITapGestureRecognizer *)tapRecognizer {
    FXLog(@"triple tap!");
    if ([self isHidden]){
        [self showExplorer];
    } else {
        [self hideExplorer];
    }
}


- (void)_addTVOSGestureRecognizer:(UIViewController *)explorer {
    UITapGestureRecognizer *tripleTaps = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tripleTap:)];
    tripleTaps.allowedPressTypes = @[[NSNumber numberWithInteger:UIPressTypePlayPause]];
    tripleTaps.numberOfTapsRequired = 3;
    [explorer.view addGestureRecognizer:tripleTaps];
}

- (FLEXExplorerViewController *)explorerViewController {
    if (!_explorerViewController) {
        _explorerViewController = [FLEXExplorerViewController new];
        _explorerViewController.delegate = self;
        #if TARGET_OS_TV
                [self _addTVOSGestureRecognizer:_explorerViewController];
        #endif
    }

    return _explorerViewController;
}

- (void)showExplorer {
    UIWindow *flex = self.explorerWindow;
    flex.hidden = NO;
    #if TARGET_OS_TV
    FLEXWindow *exp = [self explorerWindow];
    [exp makeKeyWindow];
    #endif
#if FLEX_AT_LEAST_IOS13_SDK
    if (@available(iOS 13.0, *)) {
        // Only look for a new scene if we don't have one
        if (!flex.windowScene) {
            flex.windowScene = FLEXUtility.activeScene;
        }
    }
#endif
}

- (void)hideExplorer {
    self.explorerWindow.hidden = YES;
}

- (void)toggleExplorer {
    if (self.explorerWindow.isHidden) {
        [self showExplorer];
    } else {
        [self hideExplorer];
    }
}

- (void)showExplorerFromScene:(UIWindowScene *)scene {
    #if FLEX_AT_LEAST_IOS13_SDK
    if (@available(iOS 13.0, *)) {
        self.explorerWindow.windowScene = scene;
    }
    #endif
    self.explorerWindow.hidden = NO;
}

- (BOOL)isHidden {
    return self.explorerWindow.isHidden;
}

- (FLEXExplorerToolbar *)toolbar {
    return self.explorerViewController.explorerToolbar;
}


#pragma mark - FLEXWindowEventDelegate

- (BOOL)shouldHandleTouchAtPoint:(CGPoint)pointInWindow {
    // Ask the explorer view controller
    return [self.explorerViewController shouldReceiveTouchAtWindowPoint:pointInWindow];
}

- (BOOL)canBecomeKeyWindow {
    // Only when the explorer view controller wants it because
    // it needs to accept key input & affect the status bar.
    return self.explorerViewController.wantsWindowToBecomeKey;
}


#pragma mark - FLEXExplorerViewControllerDelegate

- (void)explorerViewControllerDidFinish:(FLEXExplorerViewController *)explorerViewController {
    [self hideExplorer];
}

@end