//
//  MPPasswordInputController.m
//  MacPass
//
//  Created by Michael Starke on 17.02.13.
//  Copyright (c) 2013 HicknHack Software GmbH. All rights reserved.
//

#import "MPPasswordInputController.h"
#import "MPAppDelegate.h"
#import "MPDocumentWindowController.h"
#import "MPDocument.h"
#import "MPSettingsHelper.h"
#import "MPKeyfilePathControlDelegate.h"

#import "HNHUi/HNHUi.h"

#import "NSError+Messages.h"

@interface MPPasswordInputController ()

@property (weak) IBOutlet HNHUIRoundedSecureTextField *passwordTextField;
@property (weak) IBOutlet NSPathControl *keyPathControl;
@property (strong) MPKeyfilePathControlDelegate *pathControlDelegate;
@property (weak) IBOutlet NSImageView *errorImageView;
@property (weak) IBOutlet NSTextField *errorInfoTextField;
@property (weak) IBOutlet NSButton *togglePasswordButton;
@property (weak) IBOutlet NSButton *enablePasswordCheckBox;

@property (assign) BOOL showPassword;
@property (nonatomic, assign) BOOL enablePassword;

@end

@implementation MPPasswordInputController

- (NSString *)nibName {
  return @"PasswordInputView";
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
  if(self) {
    _enablePassword = YES;
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_selectKeyURL) name:MPDidChangeStoredKeyFilesSettings object:nil];
  }
  return self;
}

- (void)dealloc {
  [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)didLoadView {
  [self.keyPathControl setDelegate:self.pathControlDelegate];
  [self.errorImageView setImage:[NSImage imageNamed:NSImageNameCaution]];
  [self.passwordTextField bind:@"showPassword" toObject:self withKeyPath:@"showPassword" options:nil];
  [self.togglePasswordButton bind:NSValueBinding toObject:self withKeyPath:@"showPassword" options:nil];
  [self.enablePasswordCheckBox bind:NSValueBinding toObject:self withKeyPath:@"enablePassword" options:nil];
  [self.togglePasswordButton bind:NSEnabledBinding toObject:self withKeyPath:@"enablePassword" options:nil];
  [self.passwordTextField bind:NSEnabledBinding toObject:self withKeyPath:@"enablePassword" options:nil];
  [self _reset];
}

- (NSResponder *)reconmendedFirstResponder {
  return self.passwordTextField;
}

- (void)requestPassword {
  // show warning if read-only mode!
  [self _reset];
}

#pragma mark Properties
- (void)setEnablePassword:(BOOL)enablePassword {
  if(_enablePassword != enablePassword) {
    _enablePassword = enablePassword;
    if(!_enablePassword) {
      [self.passwordTextField setStringValue:@""];
    }
  }
  NSString  *placeHolderString = _enablePassword ? NSLocalizedString(@"PASSWORD_INPUT_ENTER_PASSWORD", "") : NSLocalizedString(@"PASSWORD_INPUT_NO_PASSWORD", "");
  [[self.passwordTextField cell] setPlaceholderString:placeHolderString];
}


#pragma mark -
#pragma mark Private
- (IBAction)_decrypt:(id)sender {
  MPDocument *document = [[self windowController] document];
  if(document) {
    NSError *error = nil;
    /* No password is different than an empty password */
    NSString *password = self.enablePassword ? [self.passwordTextField stringValue] : nil;
    if(![document unlockWithPassword:password
                          keyFileURL:[self.keyPathControl URL]
                               error:&error]) {
      [self _showError:error];
      [[[self view] window] shakeWindow:nil];
    }
  }
}

- (IBAction)resetKeyFile:(id)sender {
  /* If the reset was triggered by ourselves we want to preselect the keyfile */
  if(sender == self) {
    [self _selectKeyURL];
  }
  else {
    [self.keyPathControl setURL:nil];
  }
}

- (void)_reset {
  self.showPassword = NO;
  self.enablePassword = YES;
  [self.passwordTextField setStringValue:@""];
  [self.errorInfoTextField setHidden:YES];
  [self.errorImageView setHidden:YES];
  [self resetKeyFile:self];
}

- (void)_selectKeyURL {
  MPDocument *document = [[self windowController] document];
  [self.keyPathControl setURL:document.suggestedKeyURL];
}

- (void)_showError:(NSError *)error {
  if(error) {
    NSString *errorMessage = [error descriptionForErrorCode];
    [self.errorInfoTextField setStringValue:errorMessage];
  }
  [self.errorImageView setHidden:NO];
  [self.errorInfoTextField setHidden:NO];
}

@end