/*
Copyright 2024 New Vector Ltd.
Copyright 2017 Vector Creations Ltd

SPDX-License-Identifier: AGPL-3.0-only
Please see LICENSE in the repository root for full details.
 */

#import "WidgetPickerViewController.h"

#import "WidgetManager.h"
#import "WidgetViewController.h"
#import "IntegrationManagerViewController.h"
#import "GeneratedInterface-Swift.h"

@interface WidgetPickerViewController () <ServiceTermsModalCoordinatorBridgePresenterDelegate>
{
    MXSession *mxSession;
    NSString *roomId;
}

@property (nonatomic, weak) UIViewController *presentingViewController;
@property (nonatomic, strong) ServiceTermsModalCoordinatorBridgePresenter *serviceTermsModalCoordinatorBridgePresenter;
@property (nonatomic, strong) MXKRoomDataSource *roomDataSource;
@property (nonatomic, strong) Widget *selectedWidget;

@end

@implementation WidgetPickerViewController

- (instancetype)initForMXSession:(MXSession*)theMXSession inRoom:(NSString*)theRoomId
{
    self = [super init];
    if (self)
    {
        mxSession = theMXSession;
        roomId = theRoomId;

        _alertController = [UIAlertController alertControllerWithTitle:[VectorL10n widgetPickerTitle]
                                                               message:nil
                                                        preferredStyle:UIAlertControllerStyleAlert];
    }
    return self;
}

- (void)showInViewController:(MXKViewController *)mxkViewController
{
    MXKRoomDataSourceManager *roomDataSourceManager = [MXKRoomDataSourceManager sharedManagerForMatrixSession:mxSession];
    [roomDataSourceManager roomDataSourceForRoom:roomId create:NO onComplete:^(MXKRoomDataSource *roomDataSource) {

        UIAlertAction *alertAction;

        NSArray<Widget*> *widgets = [[WidgetManager sharedManager] widgetsNotOfTypes:@[kWidgetTypeJitsiV1, kWidgetTypeJitsiV2]
                                                                              inRoom:roomDataSource.room
                                                                       withRoomState:roomDataSource.roomState];

        // List widgets
        for (Widget *widget in widgets)
        {
            alertAction = [UIAlertAction actionWithTitle:widget.name ? widget.name : widget.type
                                                   style:UIAlertActionStyleDefault
                                                 handler:^(UIAlertAction * _Nonnull action)
                           {
                // Hide back button title
                [mxkViewController vc_removeBackTitle];

                [self fetchWidgetURLAndDisplayUsingWidget:widget canPresentServiceTerms:YES];
            }];
            [self.alertController addAction:alertAction];
        }

        // Link to the integration manager
        if (RiotSettings.shared.roomInfoScreenShowIntegrations)
        {
            alertAction = [UIAlertAction actionWithTitle:[VectorL10n widgetPickerManageIntegrations]
                                                   style:UIAlertActionStyleDefault
                                                 handler:^(UIAlertAction * _Nonnull action)
                           {
                               IntegrationManagerViewController *modularVC = [[IntegrationManagerViewController alloc] initForMXSession:self->mxSession
                                                                                                                                 inRoom:self->roomId
                                                                                                                                 screen:kIntegrationManagerMainScreen
                                                                                                                               widgetId:nil];

                               [mxkViewController presentViewController:modularVC animated:NO completion:nil];
                           }];
            [self.alertController addAction:alertAction];
        }

        // Cancel
        alertAction = [UIAlertAction actionWithTitle:[VectorL10n cancel]
                                               style:UIAlertActionStyleCancel
                                             handler:nil];
        [self.alertController addAction:alertAction];

        // And show it
        [mxkViewController presentViewController:self.alertController animated:YES completion:nil];
        
        self.presentingViewController = mxkViewController;
    }];
 }

- (void)fetchWidgetURLAndDisplayUsingWidget:(Widget*)widget canPresentServiceTerms:(BOOL)canPresentServiceTerms
{
    [widget widgetUrl:^(NSString * _Nonnull widgetUrl) {
 
        // Display the widget
        
        WidgetViewController *widgetVC = [[WidgetViewController alloc] initWithUrl:widgetUrl forWidget:widget];
        
        widgetVC.roomDataSource = self.roomDataSource;
        
        [self.presentingViewController.navigationController pushViewController:widgetVC animated:YES];
        
    } failure:^(NSError * _Nonnull error) {
        
        MXLogDebug(@"[WidgetPickerVC] Get widget URL failed with error: %@", error);
        
        if (canPresentServiceTerms
            && [error.domain isEqualToString:WidgetManagerErrorDomain]
            && error.code == WidgetManagerErrorCodeTermsNotSigned)
        {
            [self presentTermsForWidget:widget];
        }
        else
        {
            [[AppDelegate theDelegate] showErrorAsAlert:error];
        }
    }];
}

#pragma mark - Service terms

- (void)presentTermsForWidget:(Widget*)widget
{
    if (self.serviceTermsModalCoordinatorBridgePresenter)
    {
        return;
    }
    
    WidgetManagerConfig *config =  [[WidgetManager sharedManager] configForUser:widget.mxSession.myUser.userId];
    
    MXLogDebug(@"[WidgetVC] presentTerms for %@", config.baseUrl);
    
    ServiceTermsModalCoordinatorBridgePresenter *serviceTermsModalCoordinatorBridgePresenter = [[ServiceTermsModalCoordinatorBridgePresenter alloc] initWithSession:widget.mxSession baseUrl:config.baseUrl
                                                                                                                                                        serviceType:MXServiceTypeIntegrationManager
                                                                                                                                                        accessToken:config.scalarToken];
    serviceTermsModalCoordinatorBridgePresenter.delegate = self;
    
    [serviceTermsModalCoordinatorBridgePresenter presentFrom:self.presentingViewController animated:YES];
    self.serviceTermsModalCoordinatorBridgePresenter = serviceTermsModalCoordinatorBridgePresenter;
}

- (void)serviceTermsModalCoordinatorBridgePresenterDelegateDidAccept:(ServiceTermsModalCoordinatorBridgePresenter * _Nonnull)coordinatorBridgePresenter
{
    MXWeakify(self);
    [coordinatorBridgePresenter dismissWithAnimated:YES completion:^{
        MXStrongifyAndReturnIfNil(self);
        
        if (self.selectedWidget)
        {
            [self fetchWidgetURLAndDisplayUsingWidget:self.selectedWidget canPresentServiceTerms:NO];
        }
    }];
    self.serviceTermsModalCoordinatorBridgePresenter = nil;
}

- (void)serviceTermsModalCoordinatorBridgePresenterDelegateDidDecline:(ServiceTermsModalCoordinatorBridgePresenter * _Nonnull)coordinatorBridgePresenter session:(MXSession * _Nonnull)session
{
    [coordinatorBridgePresenter dismissWithAnimated:YES completion:nil];
    self.serviceTermsModalCoordinatorBridgePresenter = nil;
}

- (void)serviceTermsModalCoordinatorBridgePresenterDelegateDidClose:(ServiceTermsModalCoordinatorBridgePresenter * _Nonnull)coordinatorBridgePresenter
{
    self.serviceTermsModalCoordinatorBridgePresenter = nil;
}

@end