#import "RCCManagerModule.h"
#import "RCCManager.h"
#import <UIKit/UIKit.h>
#import "RCCNavigationController.h"
#import "RCCViewController.h"
#import "RCCDrawerController.h"
#import "RCCLightBox.h"
#import <React/RCTConvert.h>
#import "RCCTabBarController.h"
#import "RCCTheSideBarManagerViewController.h"
#import "RCCNotification.h"
#import "RCTHelpers.h"

#define kSlideDownAnimationDuration 0.35

typedef NS_ENUM(NSInteger, RCCManagerModuleErrorCode)
{
    RCCManagerModuleCantCreateControllerErrorCode   = -100,
    RCCManagerModuleCantFindTabControllerErrorCode  = -200,
    RCCManagerModuleMissingParamsErrorCode          = -300
};

@implementation RCTConvert (RCCManagerModuleErrorCode)

RCT_ENUM_CONVERTER(RCCManagerModuleErrorCode,
                   (@{@"RCCManagerModuleCantCreateControllerErrorCode": @(RCCManagerModuleCantCreateControllerErrorCode),
                      @"RCCManagerModuleCantFindTabControllerErrorCode": @(RCCManagerModuleCantFindTabControllerErrorCode),
                      }), RCCManagerModuleCantCreateControllerErrorCode, integerValue)
@end

@implementation RCTConvert (UIModalPresentationStyle)

RCT_ENUM_CONVERTER(UIModalPresentationStyle,
                   (@{@"fullScreen": @(UIModalPresentationFullScreen),
                      @"pageSheet": @(UIModalPresentationPageSheet),
                      @"formSheet": @(UIModalPresentationFormSheet),
                      @"currentContext": @(UIModalPresentationCurrentContext),
                      @"custom": @(UIModalPresentationCustom),
                      @"overFullScreen": @(UIModalPresentationOverFullScreen),
                      @"overCurrentContext": @(UIModalPresentationOverCurrentContext),
                      @"popover": @(UIModalPresentationPopover),
                      @"none": @(UIModalPresentationNone)
                      }), UIModalPresentationFullScreen, integerValue)

@end

@implementation RCCManagerModule

RCT_EXPORT_MODULE(RCCManager);

#pragma mark - constatnts export

- (NSDictionary *)constantsToExport
{
    return @{
             //Error codes
             @"RCCManagerModuleCantCreateControllerErrorCode" : @(RCCManagerModuleCantCreateControllerErrorCode),
             @"RCCManagerModuleCantFindTabControllerErrorCode" : @(RCCManagerModuleCantFindTabControllerErrorCode),
             @"PresentFullScreen": @"fullScreen",
             @"PresentPageSheet": @"pageSheet",
             @"PresentFormSheet": @"formSheet",
             @"PresentCurrentContext": @"currentContext",
             @"PresentCustom": @"custom",
             @"PresentOverFullScreen": @"overFullScreen",
             @"PresentOverCurrentContext": @"overCurrentContext",
             @"PresentPopover": @"popover",
             @"PresentNone": @"none"
             };
}

- (dispatch_queue_t)methodQueue
{
    return dispatch_get_main_queue();
}

#pragma mark - helper methods

+(UIViewController*)modalPresenterViewControllers:(NSMutableArray*)returnAllPresenters
{
    UIViewController *modalPresenterViewController = [UIApplication sharedApplication].delegate.window.rootViewController;
    if ((returnAllPresenters != nil) && (modalPresenterViewController != nil))
    {
        [returnAllPresenters addObject:modalPresenterViewController];
    }
    
    while (modalPresenterViewController.presentedViewController != nil)
    {
        modalPresenterViewController = modalPresenterViewController.presentedViewController;
        
        if (returnAllPresenters != nil)
        {
            [returnAllPresenters addObject:modalPresenterViewController];
        }
    }
    return modalPresenterViewController;
}

+(UIViewController*)lastModalPresenterViewController
{
    return [self modalPresenterViewControllers:nil];
}

+(NSError*)rccErrorWithCode:(NSInteger)code description:(NSString*)description
{
    NSString *safeDescription = (description == nil) ? @"" : description;
    return [NSError errorWithDomain:@"RCCControllers" code:code userInfo:@{NSLocalizedDescriptionKey: safeDescription}];
}

+(void)handleRCTPromiseRejectBlock:(RCTPromiseRejectBlock)reject error:(NSError*)error
{
    reject([NSString stringWithFormat: @"%lu", (long)error.code], error.localizedDescription, error);
}

+(void)cancelAllRCCViewControllerReactTouches
{
    [[NSNotificationCenter defaultCenter] postNotificationName:RCCViewControllerCancelReactTouchesNotification object:nil];
}

-(void)animateSnapshot:(UIView*)snapshot animationType:(NSString*)animationType resolver:(RCTPromiseResolveBlock)resolve
{
    [UIView animateWithDuration:kSlideDownAnimationDuration delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^()
     {
         if (animationType == nil || [animationType isEqualToString:@"slide-down"])
         {
             snapshot.transform = CGAffineTransformMakeTranslation(0, snapshot.frame.size.height);
         }
         else if ([animationType isEqualToString:@"fade"])
         {
             snapshot.alpha = 0;
         }
     }
                     completion:^(BOOL finished)
     {
         [snapshot removeFromSuperview];
         
         if (resolve != nil)
         {
             resolve(nil);
         }
     }];
}

-(void)dismissAllModalPresenters:(NSMutableArray*)allPresentedViewControllers resolver:(RCTPromiseResolveBlock)resolve
{
    UIViewController *rootViewController = [UIApplication sharedApplication].delegate.window.rootViewController;

    if (allPresentedViewControllers.count > 0)
    {
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0),^
                       {
                           __block NSUInteger counter = 0;
                           for (UIViewController *viewController in allPresentedViewControllers)
                           {
                               counter++;
                               
                               
                               if (viewController.presentedViewController != nil)
                               {
                                   dispatch_semaphore_t dismiss_sema = dispatch_semaphore_create(0);
                                   
                                   dispatch_async(dispatch_get_main_queue(), ^
                                                  {
                                                      [viewController dismissViewControllerAnimated:NO completion:^()
                                                       {
                                                           if (rootViewController != viewController) {
                                                               [[RCCManager sharedIntance] unregisterController:viewController];
                                                           }
                                                           
                                                           if (counter == allPresentedViewControllers.count && allPresentedViewControllers.count > 0)
                                                           {
                                                               [allPresentedViewControllers removeAllObjects];
                                                               
                                                               if (resolve != nil)
                                                               {
                                                                   resolve(nil);
                                                               }
                                                           }
                                                           dispatch_semaphore_signal(dismiss_sema);
                                                       }];
                                                  });
                                   
                                   dispatch_semaphore_wait(dismiss_sema, DISPATCH_TIME_FOREVER);
                               }
                               else if (counter == allPresentedViewControllers.count && allPresentedViewControllers.count > 0)
                               {
                                   [allPresentedViewControllers removeAllObjects];
                                   
                                   if (resolve != nil)
                                   {
                                       dispatch_async(dispatch_get_main_queue(), ^
                                                      {
                                                          resolve(nil);
                                                      });
                                   }
                               }
                           }
                       });
    }
    else if (resolve != nil)
    {
        resolve(nil);
    }
}

#pragma mark - RCT exported methods

RCT_EXPORT_METHOD(
                  setRootController:(NSDictionary*)layout animationType:(NSString*)animationType globalProps:(NSDictionary*)globalProps)
{
    if ([[RCCManager sharedInstance] getBridge].loading) {
        [self deferSetRootControllerWhileBridgeLoading:layout animationType:animationType globalProps:globalProps];
        return;
    }
    
    dispatch_async(dispatch_get_main_queue(), ^{
        [self performSetRootController:layout animationType:animationType globalProps:globalProps];
    });
}

/**
 * on RN31 there's a timing issue, we must wait for the bridge to finish loading
 */
-(void)deferSetRootControllerWhileBridgeLoading:(NSDictionary*)layout animationType:(NSString*)animationType globalProps:(NSDictionary*)globalProps
{
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.0001 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [self setRootController:layout animationType:animationType globalProps:globalProps];
    });
}

-(void)performSetRootController:(NSDictionary*)layout animationType:(NSString*)animationType globalProps:(NSDictionary*)globalProps
{
    
    NSMutableDictionary *modifiedGloablProps = [globalProps mutableCopy];
    modifiedGloablProps[GLOBAL_SCREEN_ACTION_COMMAND_TYPE] = COMMAND_TYPE_INITIAL_SCREEN;
    
    // first clear the registry to remove any refernece to the previous controllers
    [[RCCManager sharedInstance] clearModuleRegistry];
    [[RCCManager sharedInstance] setAppStyle:nil];
    
    NSDictionary *appStyle = layout[@"props"][@"appStyle"];
    if (appStyle) {
        [[RCCManager sharedIntance] setAppStyle:appStyle];
    }
    
    // create the new controller
    UIViewController *controller = [RCCViewController controllerWithLayout:layout globalProps:modifiedGloablProps bridge:[[RCCManager sharedInstance] getBridge]];
    if (controller == nil) return;
    
    id<UIApplicationDelegate> appDelegate = [UIApplication sharedApplication].delegate;
    BOOL animated = !((appDelegate.window.rootViewController == nil) || ([animationType isEqualToString:@"none"]));
    
    // if we're animating - add a snapshot now
    UIViewController *presentedViewController = nil;
    UIView *snapshot = nil;
    if (animated)
    {
        if(appDelegate.window.rootViewController.presentedViewController != nil)
            presentedViewController = appDelegate.window.rootViewController.presentedViewController;
        else
            presentedViewController = appDelegate.window.rootViewController;
        
        snapshot = [presentedViewController.view snapshotViewAfterScreenUpdates:NO];
        [appDelegate.window.rootViewController.view addSubview:snapshot];
    }
    
    // dismiss the modal controllers without animation just so they can be released
    [self dismissAllControllers:@"none" resolver:^(id result)
     {
         // set the new controller as the root
         appDelegate.window.rootViewController = controller;
         [appDelegate.window makeKeyAndVisible];
         [presentedViewController dismissViewControllerAnimated:NO completion:nil];
         
         if (animated)
         {
             // move the snaphot to the new root and animate it
             [appDelegate.window.rootViewController.view addSubview:snapshot];
             [self animateSnapshot:snapshot animationType:animationType resolver:nil];
         }
     } rejecter:nil];
}

RCT_EXPORT_METHOD(
                  NavigationControllerIOS:(NSString*)controllerId performAction:(NSString*)performAction actionParams:(NSDictionary*)actionParams)
{
    if (!controllerId || !performAction) return;
    RCCNavigationController* controller = [[RCCManager sharedInstance] getControllerWithId:controllerId componentType:@"NavigationControllerIOS"];
    if (!controller || ![controller isKindOfClass:[RCCNavigationController class]]) return;
    return [controller performAction:performAction actionParams:actionParams bridge:[[RCCManager sharedInstance] getBridge]];
}

RCT_EXPORT_METHOD(
                  DrawerControllerIOS:(NSString*)controllerId performAction:(NSString*)performAction actionParams:(NSDictionary*)actionParams)
{
    if (!controllerId || !performAction) return;
    
    id<RCCDrawerDelegate> controller = [[RCCManager sharedIntance] getControllerWithId:controllerId componentType:@"DrawerControllerIOS"];
    if (!controller || (![controller isKindOfClass:[RCCDrawerController class]] && ![controller isKindOfClass:[RCCTheSideBarManagerViewController class]])) return;
    return [controller performAction:performAction actionParams:actionParams bridge:[[RCCManager sharedIntance] getBridge]];
    
}

RCT_EXPORT_METHOD(
                  TabBarControllerIOS:(NSString*)controllerId performAction:(NSString*)performAction actionParams:(NSDictionary*)actionParams resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
    if (!controllerId || !performAction)
    {
        [RCCManagerModule handleRCTPromiseRejectBlock:reject
                                                error:[RCCManagerModule rccErrorWithCode:RCCManagerModuleMissingParamsErrorCode description:@"missing params"]];
        return;
    }
    
    RCCTabBarController* controller = [[RCCManager sharedInstance] getControllerWithId:controllerId componentType:@"TabBarControllerIOS"];
    if (!controller || ![controller isKindOfClass:[RCCTabBarController class]])
    {
        [RCCManagerModule handleRCTPromiseRejectBlock:reject
                                                error:[RCCManagerModule rccErrorWithCode:RCCManagerModuleCantFindTabControllerErrorCode description:@"could not find UITabBarController"]];
        return;
    }
    [controller performAction:performAction actionParams:actionParams bridge:[[RCCManager sharedInstance] getBridge] completion:^(){ resolve(nil); }];
}

RCT_EXPORT_METHOD(
                  modalShowLightBox:(NSDictionary*)params)
{
    [RCCLightBox showWithParams:params];
}

RCT_EXPORT_METHOD(
                  modalDismissLightBox)
{
    [RCCLightBox dismiss];
}

RCT_EXPORT_METHOD(
                  showController:(NSDictionary*)layout animationType:(NSString*)animationType globalProps:(NSDictionary*)globalProps resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{

    NSMutableDictionary *modifiedGlobalProps = [globalProps mutableCopy];
    modifiedGlobalProps[GLOBAL_SCREEN_ACTION_COMMAND_TYPE] = COMMAND_TYPE_SHOW_MODAL;
    
    UIViewController *controller = [RCCViewController controllerWithLayout:layout globalProps:modifiedGlobalProps bridge:[[RCCManager sharedInstance] getBridge]];
    if (controller == nil)
    {
        [RCCManagerModule handleRCTPromiseRejectBlock:reject
                                                error:[RCCManagerModule rccErrorWithCode:RCCManagerModuleCantCreateControllerErrorCode description:@"could not create controller"]];
        return;
    }
    
    if (layout[@"props"] && [layout[@"props"] isKindOfClass:[NSDictionary class]] && layout[@"props"][@"style"] && [layout[@"props"][@"style"] isKindOfClass: [NSDictionary class]]) {
        
        NSDictionary *style = layout[@"props"][@"style"];
        if (style[@"modalPresentationStyle"] && [style[@"modalPresentationStyle"] isKindOfClass:[NSString class]]) {
            
            NSString *presentationStyle = style[@"modalPresentationStyle"];
            UIModalPresentationStyle modalPresentationStyle = [RCTConvert UIModalPresentationStyle:presentationStyle];
            controller.modalPresentationStyle = modalPresentationStyle;
        }
    }
    
    [[RCCManagerModule lastModalPresenterViewController] presentViewController:controller
                                                                      animated:![animationType isEqualToString:@"none"]
                                                                    completion:^(){ resolve(nil); }];
}

- (UIViewController *) getVisibleViewControllerFor:(UIViewController *)vc
{
    if ([vc isKindOfClass:[UINavigationController class]])
    {
        return [self getVisibleViewControllerFor:[((UINavigationController*)vc) visibleViewController]];
    }
    else if ([vc isKindOfClass:[UITabBarController class]])
    {
        return [self getVisibleViewControllerFor:[((UITabBarController*)vc) selectedViewController]];
    }
    else if (vc.presentedViewController)
    {
        return [self getVisibleViewControllerFor:vc.presentedViewController];
    }
    else if ([vc isKindOfClass:[TheSidebarController class]]) {
        TheSidebarController *drawerController = (TheSidebarController*) vc;
        return [self getVisibleViewControllerFor:drawerController.contentViewController];
    }
    else if ([vc isKindOfClass:[MMDrawerController class]]) {
        MMDrawerController *drawerController = (MMDrawerController*) vc;
        return [self getVisibleViewControllerFor:drawerController.centerViewController];
    }
    else
    {
        return vc;
    }
}

RCT_EXPORT_METHOD(getCurrentlyVisibleScreenId:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
    UIViewController *rootVC = [UIApplication sharedApplication].delegate.window.rootViewController;
    UIViewController *visibleVC = [self getVisibleViewControllerFor:rootVC];
    NSString *controllerId = [[RCCManager sharedIntance] getIdForController:visibleVC];
    id result = (controllerId != nil) ? @{@"screenId": controllerId} : nil;
    resolve(result);
}

-(BOOL)viewControllerIsModal:(UIViewController*)viewController
{
    BOOL viewControllerIsModal = (viewController.presentingViewController.presentedViewController == viewController)
    || ((viewController.navigationController != nil) && (viewController.navigationController.presentingViewController.presentedViewController == viewController.navigationController) && (viewController == viewController.navigationController.viewControllers[0]))
    || ([viewController.tabBarController.presentingViewController isKindOfClass:[UITabBarController class]]);
    return viewControllerIsModal;
}

RCT_EXPORT_METHOD(
                  dismissController:(NSString*)animationType resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
    UIViewController* vc = [RCCManagerModule lastModalPresenterViewController];
    if ([self viewControllerIsModal:vc])
    {
        [[RCCManager sharedIntance] unregisterController:vc];
        
        [vc dismissViewControllerAnimated:![animationType isEqualToString:@"none"]
                               completion:^(){ resolve(nil); }];
    }
    else
    {
      resolve(nil);
    }
}

RCT_EXPORT_METHOD(
                  dismissAllControllers:(NSString*)animationType resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
    if([UIApplication sharedApplication].delegate.window.rootViewController.presentedViewController == nil)
    {//if there are no modal - do nothing
        resolve(nil);
        return;
    }
    
    NSMutableArray *allPresentedViewControllers = [NSMutableArray array];
    [RCCManagerModule modalPresenterViewControllers:allPresentedViewControllers];
    
    BOOL animated = ![animationType isEqualToString:@"none"];
    if (animated)
    {
        id<UIApplicationDelegate> appDelegate = [UIApplication sharedApplication].delegate;
        UIView *snapshot = [appDelegate.window snapshotViewAfterScreenUpdates:NO];
        [appDelegate.window addSubview:snapshot];
        
        [self dismissAllModalPresenters:allPresentedViewControllers resolver:^(id result)
         {
             [self animateSnapshot:snapshot animationType:animationType resolver:resolve];
         }];
    }
    else
    {
        [self dismissAllModalPresenters:allPresentedViewControllers resolver:resolve];
    }
}

RCT_EXPORT_METHOD(
                  showNotification:(NSDictionary*)params resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
    [RCCNotification showWithParams:params resolver:resolve rejecter:reject];
}

RCT_EXPORT_METHOD(
                  dismissNotification:(NSDictionary*)params resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
    [RCCNotification dismissWithParams:params resolver:resolve rejecter:reject];
}

RCT_EXPORT_METHOD(
                  cancelAllReactTouches)
{
    [RCCManagerModule cancelAllRCCViewControllerReactTouches];
}

@end