//
//  CodeVerificationViewController.m
//  Signal
//
//  Created by Dylan Bourgeois on 13/11/14.
//  Copyright (c) 2014 Open Whisper Systems. All rights reserved.
//

#import "CodeVerificationViewController.h"

#import "Environment.h"
#import "PhoneNumberDirectoryFilterManager.h"
#import "RPServerRequestsManager.h"
#import "LocalizableText.h"
#import "PushManager.h"
#import "TSAccountManager.h"

@interface CodeVerificationViewController ()

@end

@implementation CodeVerificationViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self initializeKeyboardHandlers];
    _headerLabel.text = NSLocalizedString(@"VERIFICATION_HEADER", @"");
    _challengeTextField.placeholder = NSLocalizedString(@"VERIFICATION_CHALLENGE_DEFAULT_TEXT", @"");
    [_challengeButton setTitle:NSLocalizedString(@"VERIFICATION_CHALLENGE_SUBMIT_CODE", @"")
                      forState:UIControlStateNormal];

    [_sendCodeViaSMSAgainButton setTitle:NSLocalizedString(@"VERIFICATION_CHALLENGE_SUBMIT_AGAIN", @"")
                                forState:UIControlStateNormal];
    [_sendCodeViaVoiceButton
        setTitle:[@"     " stringByAppendingString:NSLocalizedString(@"VERIFICATION_CHALLENGE_SEND_VIAVOICE", @"")]
        forState:UIControlStateNormal];
    [_changeNumberButton
        setTitle:[@"     " stringByAppendingString:NSLocalizedString(@"VERIFICATION_CHALLENGE_CHANGE_NUMBER", @"")]
        forState:UIControlStateNormal];
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self enableServerActions:YES];
    [_phoneNumberEntered setText:_formattedPhoneNumber];
    [self adjustScreenSizes];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}


- (IBAction)verifyChallengeAction:(id)sender
{
    [self enableServerActions:NO];
    [_challengeTextField resignFirstResponder];

    [self registerWithSuccess:^{
      [_submitCodeSpinner stopAnimating];
      [Environment.getCurrent.phoneDirectoryManager forceUpdate];
      [self.navigationController dismissViewControllerAnimated:YES completion:nil];
    } failure:^(NSError *error) {
      [self showAlertForError:error];
      [self enableServerActions:YES];
      [_submitCodeSpinner stopAnimating];
    }];
}


- (void)registerWithSuccess:(void (^)())success failure:(void (^)(NSError *))failure
{
    [_submitCodeSpinner startAnimating];
    [[RPServerRequestsManager sharedInstance] performRequest:[RPAPICall verifyVerificationCode:_challengeTextField.text]
        success:^(NSURLSessionDataTask *task, id responseObject) {

          [PushManager.sharedManager registrationAndRedPhoneTokenRequestWithSuccess:^(NSData *pushToken, NSData *voipToken, NSString *signupToken) {
              [TSAccountManager registerWithRedPhoneToken:signupToken
                pushToken:pushToken
             voipToken:voipToken
                success:^{
                  success();
                }
                failure:^(NSError *error) {
                  failure(error);
                }];
          } failure:^(NSError *error) {
            failure(error);
            [_submitCodeSpinner stopAnimating];
          }];
        }
        failure:^(NSURLSessionDataTask *task, NSError *error) {
          NSHTTPURLResponse *badResponse = (NSHTTPURLResponse *)task.response;
          NSError *responseError = [self errorForResponse:badResponse];

          failure(responseError);
          [_submitCodeSpinner stopAnimating];

        }];
}


// TODO: If useful, this could possibly go in a less-specific class
- (void)showAlertForError:(NSError *)error
{
    if (error == nil) {
        DDLogError(@"%@: Error condition, but no NSError to display", self.class);
        return;
    } else if (error.localizedDescription.length == 0) {
        DDLogError(@"%@: Unable to display error because localizedDescription was not set: %@", self.class, error);
        return;
    }

    NSString *alertBody = nil;
    if (error.localizedFailureReason.length > 0) {
        alertBody = error.localizedFailureReason;
    } else if (error.localizedRecoverySuggestion.length > 0) {
        alertBody = error.localizedRecoverySuggestion;
    }

    SignalAlertView(error.localizedDescription, alertBody);
}


- (NSError *)errorForResponse:(NSHTTPURLResponse *)badResponse
{
    NSString *description = NSLocalizedString(@"REGISTRATION_ERROR", @"");
    NSString *failureReason = nil;
    TSRegistrationFailure failureType;

    if (badResponse.statusCode == 401) {
        failureReason = REGISTER_CHALLENGE_ALERT_VIEW_BODY;
        failureType = kTSRegistrationFailureAuthentication;
    } else if (badResponse.statusCode == 413) {
        failureReason = NSLocalizedString(@"REGISTER_RATE_LIMITING_BODY", @"");
        failureType = kTSRegistrationFailureRateLimit;
    } else {
        failureReason = [NSString
            stringWithFormat:@"%@ %lu", NSLocalizedString(@"SERVER_CODE", @""), (unsigned long)badResponse.statusCode];
        failureType = kTSRegistrationFailureNetwork;
    }

    NSDictionary *userInfo =
        @{NSLocalizedDescriptionKey : description, NSLocalizedFailureReasonErrorKey : failureReason};
    NSError *error = [NSError errorWithDomain:TSRegistrationErrorDomain code:failureType userInfo:userInfo];

    return error;
}

#pragma mark - Send codes again
- (IBAction)sendCodeSMSAction:(id)sender
{
    [self enableServerActions:NO];

    [_requestCodeAgainSpinner startAnimating];
    [[RPServerRequestsManager sharedInstance] performRequest:[RPAPICall requestVerificationCode]
        success:^(NSURLSessionDataTask *task, id responseObject) {
          [self enableServerActions:YES];
          [_requestCodeAgainSpinner stopAnimating];

        }
        failure:^(NSURLSessionDataTask *task, NSError *error) {

          DDLogError(@"Registration failed with information %@", error.description);

          UIAlertView *registrationErrorAV = [[UIAlertView alloc] initWithTitle:REGISTER_ERROR_ALERT_VIEW_TITLE
                                                                        message:REGISTER_ERROR_ALERT_VIEW_BODY
                                                                       delegate:nil
                                                              cancelButtonTitle:REGISTER_ERROR_ALERT_VIEW_DISMISS
                                                              otherButtonTitles:nil, nil];

          [registrationErrorAV show];

          [self enableServerActions:YES];
          [_requestCodeAgainSpinner stopAnimating];
        }];
}

- (IBAction)sendCodeVoiceAction:(id)sender
{
    [self enableServerActions:NO];

    [_requestCallSpinner startAnimating];
    [[RPServerRequestsManager sharedInstance] performRequest:[RPAPICall requestVerificationCodeWithVoice]
        success:^(NSURLSessionDataTask *task, id responseObject) {

          [self enableServerActions:YES];
          [_requestCallSpinner stopAnimating];

        }
        failure:^(NSURLSessionDataTask *task, NSError *error) {

          DDLogError(@"Registration failed with information %@", error.description);

          UIAlertView *registrationErrorAV = [[UIAlertView alloc] initWithTitle:REGISTER_ERROR_ALERT_VIEW_TITLE
                                                                        message:REGISTER_ERROR_ALERT_VIEW_BODY
                                                                       delegate:nil
                                                              cancelButtonTitle:REGISTER_ERROR_ALERT_VIEW_DISMISS
                                                              otherButtonTitles:nil, nil];

          [registrationErrorAV show];
          [self enableServerActions:YES];
          [_requestCallSpinner stopAnimating];
        }];
}

- (void)enableServerActions:(BOOL)enabled
{
    [_challengeButton setEnabled:enabled];
    [_sendCodeViaSMSAgainButton setEnabled:enabled];
    [_sendCodeViaVoiceButton setEnabled:enabled];
}


#pragma mark - Keyboard notifications

- (void)initializeKeyboardHandlers
{
    UITapGestureRecognizer *outsideTabRecognizer =
        [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboardFromAppropriateSubView)];
    [self.view addGestureRecognizer:outsideTabRecognizer];
}

- (void)dismissKeyboardFromAppropriateSubView
{
    [self.view endEditing:NO];
}

- (void)adjustScreenSizes
{
    CGFloat screenHeight = [UIScreen mainScreen].bounds.size.height;
    CGFloat blueHeaderHeight;

    if (screenHeight < 667) {
        self.signalLogo.hidden = YES;
        blueHeaderHeight = screenHeight - 400;
    } else {
        blueHeaderHeight = screenHeight - 410;
    }

    _headerConstraint.constant = blueHeaderHeight;
}

@end