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#import <FPWCSApi2/FPWCSApi2.h>

- (FPWCSApi2Session *)connect {
    FPWCSApi2SessionOptions *options = [[FPWCSApi2SessionOptions alloc] init];
    options.urlServer = _connectUrl.text;
    options.appKey = @"clickToCallApp";
    NSError *error;
    session = [FPWCSApi2 createSession:options error:&error];
    if (error) {
        UIAlertController * alert = [UIAlertController
                                     alertControllerWithTitle:@"Failed to connect"
                                     message:error.localizedDescription
                                     preferredStyle:UIAlertControllerStyleAlert];
        
        UIAlertAction* okButton = [UIAlertAction
                                   actionWithTitle:@"Ok"
                                   style:UIAlertActionStyleDefault
                                   handler:^(UIAlertAction * action) {
                                       [self onDisconnected];
                                   }];
        
        [alert addAction:okButton];
        [self presentViewController:alert animated:YES completion:nil];
        return nil;
    }
    
    [session on:kFPWCSSessionStatusEstablished callback:^(FPWCSApi2Session *rSession){
        [self changeConnectionStatus:[rSession getStatus]];
        [self onConnected:rSession];
    }];
    
    [session on:kFPWCSSessionStatusDisconnected callback:^(FPWCSApi2Session *rSession){
        [self changeConnectionStatus:[rSession getStatus]];
        [self onDisconnected];
        session = nil;
    }];
    
    [session on:kFPWCSSessionStatusFailed callback:^(FPWCSApi2Session *rSession){
        [self changeConnectionStatus:[rSession getStatus]];
        [self onDisconnected];
        session = nil;
    }];
    
    [session connect];
    return session;
}

- (void)onConnected:(FPWCSApi2Session *)session {
    [self onHangup];
    [self call];
}

- (FPWCSApi2Call *)call {
    FPWCSApi2CallOptions *options = [[FPWCSApi2CallOptions alloc] init];
    options.callee = _callee.input.text;
    options.localConstraints = [[FPWCSApi2MediaConstraints alloc] initWithAudio:YES video:NO];
    NSError *error;
    call = [session createCall:options error:&error];
    if (!call) {
        UIAlertController * alert = [UIAlertController
                                     alertControllerWithTitle:@"Failed to create call"
                                     message:error.localizedDescription
                                     preferredStyle:UIAlertControllerStyleAlert];
        
        UIAlertAction* okButton = [UIAlertAction
                                   actionWithTitle:@"Ok"
                                   style:UIAlertActionStyleDefault
                                   handler:^(UIAlertAction * action) {
                                       [self onDisconnected];
                                   }];
        
        [alert addAction:okButton];
        [self presentViewController:alert animated:YES completion:nil];
        return nil;
    }

    [call on:kFPWCSCallStatusBusy callback:^(FPWCSApi2Call *call){
        [self changeCallStatus:call];
        [self onDisconnected];
    }];
    
    [call on:kFPWCSCallStatusFailed callback:^(FPWCSApi2Call *call){
        [self changeCallStatus:call];
        [self onDisconnected];
    }];
    
    [call on:kFPWCSCallStatusRing callback:^(FPWCSApi2Call *call){
        [self changeCallStatus:call];
        [self onHangup];
    }];
    
    [call on:kFPWCSCallStatusHold callback:^(FPWCSApi2Call *call){
        [self changeCallStatus:call];
    }];
    
    [call on:kFPWCSCallStatusEstablished callback:^(FPWCSApi2Call *call){
        [self changeCallStatus:call];
        [self onHangup];
    }];
    
    [call on:kFPWCSCallStatusFinish callback:^(FPWCSApi2Call *call){
        [self changeCallStatus:call];
        [self onDisconnected];
    }];
    
    [call call];
    return call;
}

- (void)callButton:(UIButton *)button {
    [self changeViewState:button enabled:NO];
    if ([button.titleLabel.text isEqualToString:@"HANGUP"]) {
        if (call) {
            [call hangup];
        }
    } else {
        if (session) {
            [self call];
        } else {
            [self connect];
        }
    }
}