/*
 Copyright 2015 OpenMarket Ltd
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import "SettingsViewController.h"

#import "RageShakeManager.h"

#import "AppDelegate.h"

#import "VectorDesignValues.h"

#import "AvatarGenerator.h"

#define SETTINGS_SECTION_SIGN_OUT_INDEX                 0
#define SETTINGS_SECTION_USER_SETTINGS_INDEX            1
#define SETTINGS_SECTION_NOTIFICATIONS_SETTINGS_INDEX   2
#define SETTINGS_SECTION_OTHER_INDEX                    3
#define SETTINGS_SECTION_COUNT                          4


#define USER_SETTINGS_PROFILE_PICTURE_INDEX     0
#define USER_SETTINGS_DISPLAY_NAME_INDEX        1
#define USER_SETTINGS_FIRST_NAME_INDEX          2
#define USER_SETTINGS_SURNAME_INDEX             3
#define USER_SETTINGS_EMAIL_ADDRESS_INDEX       4
#define USER_SETTINGS_CHANGE_PASSWORD_INDEX     5
#define USER_SETTINGS_PHONE_NUMBER_INDEX        6
#define USER_SETTINGS_NIGHT_MODE_SEP_INDEX      7
#define USER_SETTINGS_NIGHT_MODE_INDEX          8
#define USER_SETTINGS_COUNT                     9

#define NOTIFICATION_SETTINGS_ENABLE_ALL_INDEX          0
#define NOTIFICATION_SETTINGS_CONTAINING_MY_NAME_INDEX  1
#define NOTIFICATION_SETTINGS_SENT_TO_ME_INDEX          2
#define NOTIFICATION_SETTINGS_INVITED_TO_ROOM_INDEX     3
#define NOTIFICATION_SETTINGS_PEOPLE_LEAVE_JOIN_INDEX   4
#define NOTIFICATION_SETTINGS_CALL_INVITATION_INDEX     5
#define NOTIFICATION_SETTINGS_COUNT                     6

#define OTHER_VERSION_INDEX         0
#define OTHER_TERM_CONDITIONS_INDEX 1
#define OTHER_PRIVACY_INDEX         2
#define OTHER_CLEAR_CACHE_INDEX     3
#define OTHER_COUNT                 4


@interface SettingsViewController ()
{
    // listener
    id removedAccountObserver;
    id accountUserInfoObserver;
    id apnsInfoUpdateObserver;
    
    id notificationCenterWillUpdateObserver;
    id notificationCenterDidUpdateObserver;
    id notificationCenterDidFailObserver;
    
    // picker
    MediaPickerViewController* mediaPicker;
    
    // temporary data
    UIImage* newThumbnailImage;
    NSURL* newThumbnailimageURL;
    
}

@end

@implementation SettingsViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    // Setup `MXKRoomMemberListViewController` properties
    self.rageShakeManager = [RageShakeManager sharedManager];
    
    self.tableView.backgroundColor = VECTOR_LIGHT_GRAY_COLOR;
    
    // Add observer to handle removed accounts
    removedAccountObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXKAccountManagerDidRemoveAccountNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notif) {
        
        MXKAccount *account = notif.object;
        if (account)
        {
            if (self.childViewControllers.count)
            {
                for (id viewController in self.childViewControllers)
                {
                    // Check whether details of this account was displayed
                    if ([viewController isKindOfClass:[MXKAccountDetailsViewController class]])
                    {
                        MXKAccountDetailsViewController *accountDetailsViewController = viewController;
                        if ([accountDetailsViewController.mxAccount.mxCredentials.userId isEqualToString:account.mxCredentials.userId])
                        {
                            // pop the account details view controller
                            [self.navigationController popToRootViewControllerAnimated:YES];
                            break;
                        }
                    }
                }
            }
        }
        
        // Refresh table to remove this account
        [self.tableView reloadData];
    }];
    
    // Add observer to handle accounts update
    accountUserInfoObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXKAccountUserInfoDidChangeNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notif) {
        
        [self stopActivityIndicator];
        [self.tableView reloadData];
    }];
    
    // Add observer to apns
    apnsInfoUpdateObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXKAccountAPNSActivityDidChangeNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notif) {
        
        [self stopActivityIndicator];
        [self.tableView reloadData];
    }];
    
    
    // Add each matrix session, to update the view controller appearance according to mx sessions state
    NSArray *sessions = [AppDelegate theDelegate].mxSessions;
    for (MXSession *mxSession in sessions)
    {
        [self addMatrixSession:mxSession];
    }
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)destroy
{
    [self reset];
    
    [super destroy];
}

- (void)onMatrixSessionStateDidChange:(NSNotification *)notif
{
    MXSession *mxSession = notif.object;
    
    // Check whether the concerned session is a new one which is not already associated with this view controller.
    if (mxSession.state == MXSessionStateInitialised && [self.mxSessions indexOfObject:mxSession] != NSNotFound)
    {
        // Store this new session
        [self addMatrixSession:mxSession];
    }
    else
    {
        [super onMatrixSessionStateDidChange:notif];
    }
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    if ([MXKAccountManager sharedManager].activeAccounts.count > 0)
    {
        MXKAccount* account = [MXKAccountManager sharedManager].activeAccounts.firstObject;
        
        // Refresh existing notification rules
        [account.mxSession.notificationCenter refreshRules:^{
            
            [self stopActivityIndicator];
            [self.tableView reloadData];
            
        } failure:^(NSError *error) {
            
            [self stopActivityIndicator];
            
        }];
        
        notificationCenterWillUpdateObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXNotificationCenterWillUpdateRules object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
            [self startActivityIndicator];
        }];
        
        notificationCenterDidUpdateObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXNotificationCenterDidUpdateRules object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
            [self stopActivityIndicator];
            [self.tableView reloadData];
        }];
        
        notificationCenterDidFailObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXNotificationCenterDidFailRulesUpdate object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
            [self stopActivityIndicator];
            
            // Notify MatrixKit user
            [[NSNotificationCenter defaultCenter] postNotificationName:kMXKErrorNotification object:note.userInfo[kMXNotificationCenterErrorKey]];
        }];
    }
    
    
    // Refresh display
    [self.tableView reloadData];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    if (notificationCenterWillUpdateObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:notificationCenterWillUpdateObserver];
        notificationCenterWillUpdateObserver = nil;
    }
    
    if (notificationCenterDidUpdateObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:notificationCenterDidUpdateObserver];
        notificationCenterDidUpdateObserver = nil;
    }
    
    if (notificationCenterDidFailObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:notificationCenterDidFailObserver];
        notificationCenterDidFailObserver = nil;
    }
    
}

#pragma mark - Internal methods

- (void)reset
{
    // Remove observers
    if (removedAccountObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:removedAccountObserver];
        removedAccountObserver = nil;
    }
    
    if (accountUserInfoObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:accountUserInfoObserver];
        accountUserInfoObserver = nil;
    }
    
    if (apnsInfoUpdateObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:apnsInfoUpdateObserver];
        apnsInfoUpdateObserver = nil;
    }
    
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (IBAction)onAccountToggleChange:(id)sender
{
    UISwitch *accountSwitchToggle = sender;
    
    NSArray *accounts = [[MXKAccountManager sharedManager] accounts];
    if (accountSwitchToggle.tag < accounts.count)
    {
        MXKAccount *account = [accounts objectAtIndex:accountSwitchToggle.tag];
        account.disabled = !accountSwitchToggle.on;
    }
    
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tableView reloadData];
    });
}

#pragma mark - Segues

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Keep ref on destinationViewController
    [super prepareForSegue:segue sender:sender];
    
    if ([[segue identifier] isEqualToString:@"showAccountDetails"])
    {
        //MXKAccountDetailsViewController *accountViewController = segue.destinationViewController;
        //accountViewController.mxAccount = selectedAccount;
        //selectedAccount = nil;
    }
}

#pragma mark - UITableView data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return SETTINGS_SECTION_COUNT;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSInteger count = 0;
    
    if (section == SETTINGS_SECTION_SIGN_OUT_INDEX)
    {
        count = 1;
    }
    else if (section == SETTINGS_SECTION_USER_SETTINGS_INDEX)
    {
        count = USER_SETTINGS_COUNT;
    }
    else if (section == SETTINGS_SECTION_NOTIFICATIONS_SETTINGS_INDEX)
    {
        count = NOTIFICATION_SETTINGS_COUNT;
    }
    else if (section == SETTINGS_SECTION_OTHER_INDEX)
    {
        count = OTHER_COUNT;
    }
    
    return count;
}

- (MXKTableViewCellWithLabelAndTextField*)getLabelAndTextFieldCell:(UITableView*)tableview
{
    MXKTableViewCellWithLabelAndTextField *cell = [tableview dequeueReusableCellWithIdentifier:[MXKTableViewCellWithLabelAndTextField defaultReuseIdentifier]];
    
    if (!cell)
    {
        cell = [[MXKTableViewCellWithLabelAndTextField alloc] init];
    }
    
    cell.mxkTextField.userInteractionEnabled = YES;
    cell.mxkTextField.borderStyle = UITextBorderStyleNone;
    cell.mxkTextField.textAlignment = NSTextAlignmentRight;
    cell.mxkTextField.textColor = [UIColor lightGrayColor];
    
    cell.accessoryType = UITableViewCellAccessoryNone;
    
    cell.alpha = 1.0f;
    cell.userInteractionEnabled = YES;
    
    return cell;
}

- (MXKTableViewCellWithLabelAndSwitch*)getLabelAndSwitchCell:(UITableView*)tableview
{
    MXKTableViewCellWithLabelAndSwitch *cell = [tableview dequeueReusableCellWithIdentifier:[MXKTableViewCellWithLabelAndSwitch defaultReuseIdentifier]];
    
    if (!cell)
    {
        cell = [[MXKTableViewCellWithLabelAndSwitch alloc] init];
    }
    
    return cell;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSInteger section = indexPath.section;
    NSInteger row = indexPath.row;

    // set the cell to a default value to avoid application crashes
    UITableViewCell *cell = [[UITableViewCell alloc] init];
    cell.backgroundColor = [UIColor redColor];
    
    // check if there is a valid session
    if (([AppDelegate theDelegate].mxSessions.count == 0) || ([MXKAccountManager sharedManager].activeAccounts.count == 0))
    {
        // else use a default cell
        return cell;
    }
    
    MXSession* session = [[AppDelegate theDelegate].mxSessions objectAtIndex:0];
    MXKAccount* account = [MXKAccountManager sharedManager].activeAccounts.firstObject;

    if (section == SETTINGS_SECTION_SIGN_OUT_INDEX)
    {
        MXKTableViewCellWithButton *signOutCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithButton defaultReuseIdentifier]];
        if (!signOutCell)
        {
            signOutCell = [[MXKTableViewCellWithButton alloc] init];
        }
        
        NSString* title = NSLocalizedStringFromTable(@"settings_sign_out", @"Vector", nil);
        
        [signOutCell.mxkButton setTitle:title forState:UIControlStateNormal];
        [signOutCell.mxkButton setTitle:title forState:UIControlStateHighlighted];
        [signOutCell.mxkButton setTintColor:VECTOR_GREEN_COLOR];
        signOutCell.mxkButton.titleLabel.font = [UIFont boldSystemFontOfSize:16];
        
        [signOutCell.mxkButton  removeTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
        [signOutCell.mxkButton addTarget:self action:@selector(onSignout:) forControlEvents:UIControlEventTouchUpInside];
        
        cell = signOutCell;
    }
    else if (section == SETTINGS_SECTION_USER_SETTINGS_INDEX)
    {
        MXMyUser* myUser = session.myUser;
        
        if (row == USER_SETTINGS_PROFILE_PICTURE_INDEX)
        {
            MXKTableViewCellWithLabelAndMXKImageView *profileCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithLabelAndMXKImageView defaultReuseIdentifier]];
            
            if (!profileCell)
            {
                profileCell = [[MXKTableViewCellWithLabelAndMXKImageView alloc] init];
            }
            
            profileCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_profile_picture", @"Vector", nil);
            
            // if the user defines a new avatar
            if (newThumbnailImage)
            {
                profileCell.mxkImageView.image = newThumbnailImage;
            }
            else
            {
                UIImage* avatarImage = [AvatarGenerator generateRoomMemberAvatar:myUser.userId displayName:myUser.displayname];
                
                if (myUser.avatarUrl)
                {
                    profileCell.mxkImageView.enableInMemoryCache = YES;
                    
                    [profileCell.mxkImageView setImageURL:[session.matrixRestClient urlOfContentThumbnail:myUser.avatarUrl toFitViewSize:profileCell.mxkImageView.frame.size withMethod:MXThumbnailingMethodCrop] withType:nil andImageOrientation:UIImageOrientationUp previewImage:avatarImage];
                }
                else
                {
                    profileCell.mxkImageView.image = avatarImage;
                }
            }
            
            [profileCell.mxkImageView.layer setCornerRadius:profileCell.mxkImageView.frame.size.width / 2];
            profileCell.mxkImageView.clipsToBounds = YES;
            
            cell = profileCell;
        }
        else if (row == USER_SETTINGS_DISPLAY_NAME_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *displaynameCell = [self getLabelAndTextFieldCell:tableView];
            
            displaynameCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_display_name", @"Vector", nil);
            displaynameCell.mxkTextField.text = myUser.displayname;
            
            cell = displaynameCell;
        }
        else if (row == USER_SETTINGS_FIRST_NAME_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *firstCell = [self getLabelAndTextFieldCell:tableView];
        
            firstCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_first_name", @"Vector", nil);
            firstCell.mxkTextField.userInteractionEnabled = NO;
            
            cell = firstCell;
        }
        else if (row == USER_SETTINGS_SURNAME_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *surnameCell = [self getLabelAndTextFieldCell:tableView];
            
            surnameCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_surname", @"Vector", nil);
            surnameCell.mxkTextField.userInteractionEnabled = NO;
            
            cell = surnameCell;
        }
        else if (row == USER_SETTINGS_EMAIL_ADDRESS_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *emailCell = [self getLabelAndTextFieldCell:tableView];
            
            emailCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_email_address", @"Vector", nil);
            emailCell.mxkTextField.userInteractionEnabled = NO;
            
            cell = emailCell;
        }
        else if (row == USER_SETTINGS_CHANGE_PASSWORD_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *passwordCell = [self getLabelAndTextFieldCell:tableView];
            
            passwordCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_change_password", @"Vector", nil);
            passwordCell.mxkTextField.userInteractionEnabled = NO;
            
            cell = passwordCell;
        }
        else if (row == USER_SETTINGS_PHONE_NUMBER_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *phonenumberCell = [self getLabelAndTextFieldCell:tableView];
            
            phonenumberCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_phone_number", @"Vector", nil);
            phonenumberCell.mxkTextField.userInteractionEnabled = NO;
            
            cell = phonenumberCell;
        }
        else if (row == USER_SETTINGS_NIGHT_MODE_SEP_INDEX)
        {
            UITableViewCell *sepCell = [[UITableViewCell alloc] init];
            sepCell.backgroundColor = VECTOR_LIGHT_GRAY_COLOR;
            
            cell = sepCell;
        }
        else if (row == USER_SETTINGS_NIGHT_MODE_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *nightModeCell = [self getLabelAndTextFieldCell:tableView];
                                                                    
            nightModeCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_night_mode", @"Vector", nil);
            nightModeCell.mxkTextField.userInteractionEnabled = NO;
            nightModeCell.mxkTextField.text = NSLocalizedStringFromTable(@"off", @"Vector", nil);
            nightModeCell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
            cell = nightModeCell;
        }
    }
    else if (section == SETTINGS_SECTION_NOTIFICATIONS_SETTINGS_INDEX)
    {
        
        MXPushRule *rule;
        
        if (row == NOTIFICATION_SETTINGS_ENABLE_ALL_INDEX)
        {
            MXKTableViewCellWithLabelAndSwitch* enableAllCell = [self getLabelAndSwitchCell:tableView];
    
            enableAllCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_enable_all_notif", @"Vector", nil);
            enableAllCell.mxkSwitch.on = account.pushNotificationServiceIsActive;
            
            cell = enableAllCell;
        }
        else if (row == NOTIFICATION_SETTINGS_CONTAINING_MY_NAME_INDEX)
        {
            MXKTableViewCellWithLabelAndSwitch* myNameCell = [self getLabelAndSwitchCell:tableView];
            
            myNameCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_messages_my_name", @"Vector", nil);
            rule = [session.notificationCenter ruleById:kMXNotificationCenterContainDisplayNameRuleID];
            cell = myNameCell;
        }
        else if (row == NOTIFICATION_SETTINGS_SENT_TO_ME_INDEX)
        {
            MXKTableViewCellWithLabelAndSwitch* sentToMeCell = [self getLabelAndSwitchCell:tableView];
            sentToMeCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_messages_sent_to_me", @"Vector", nil);
            rule = [session.notificationCenter ruleById:kMXNotificationCenterOneToOneRoomRuleID];
            cell = sentToMeCell;
        }
        else if (row == NOTIFICATION_SETTINGS_INVITED_TO_ROOM_INDEX)
        {
            MXKTableViewCellWithLabelAndSwitch* invitedToARoom = [self getLabelAndSwitchCell:tableView];
            invitedToARoom.mxkLabel.text = NSLocalizedStringFromTable(@"settings_invited_to_room", @"Vector", nil);
            rule = [session.notificationCenter ruleById:kMXNotificationCenterInviteMeRuleID];
            cell = invitedToARoom;
        }
        else if (row == NOTIFICATION_SETTINGS_PEOPLE_LEAVE_JOIN_INDEX)
        {
            MXKTableViewCellWithLabelAndSwitch* peopleJoinLeaveCell = [self getLabelAndSwitchCell:tableView];
            peopleJoinLeaveCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_join_leave_rooms", @"Vector", nil);
            rule = [session.notificationCenter ruleById:kMXNotificationCenterMemberEventRuleID];
            cell = peopleJoinLeaveCell;
        }
        else if (row == NOTIFICATION_SETTINGS_CALL_INVITATION_INDEX)
        {
            MXKTableViewCellWithLabelAndSwitch* callInvitationCell = [self getLabelAndSwitchCell:tableView];
            callInvitationCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_call_invitations", @"Vector", nil);
            rule = [session.notificationCenter ruleById:kMXNotificationCenterCallRuleID];
            cell = callInvitationCell;
        }
        
        // common management
        MXKTableViewCellWithLabelAndSwitch* switchCell = (MXKTableViewCellWithLabelAndSwitch*)cell;
        switchCell.mxkSwitch.tag = row;
        
        if (rule)
        {
            switchCell.mxkSwitch.on = rule.enabled;
        }
        
        [switchCell.mxkSwitch  removeTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
        [switchCell.mxkSwitch addTarget:self action:@selector(onRuleUpdate:) forControlEvents:UIControlEventTouchUpInside];
    
    }
    else if (section == SETTINGS_SECTION_OTHER_INDEX)
    {
        if (row == OTHER_VERSION_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *versionCell = [self getLabelAndTextFieldCell:tableView];
            
            NSString* appVersion = [AppDelegate theDelegate].appVersion;
            NSString* build = [AppDelegate theDelegate].build;
            
            versionCell.mxkLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"settings_version", @"Vector", nil), [NSString stringWithFormat:@"%@ %@", appVersion, build]];
            versionCell.mxkTextField.userInteractionEnabled = NO;
            versionCell.mxkTextField.text = nil;
            
            cell = versionCell;
        }
        else if (row == OTHER_TERM_CONDITIONS_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *termAndConditionCell = [self getLabelAndTextFieldCell:tableView];
            
            termAndConditionCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_term_conditions", @"Vector", nil);
            termAndConditionCell.mxkTextField.userInteractionEnabled = NO;
            termAndConditionCell.mxkTextField.text = nil;
            
            cell = termAndConditionCell;
        }
        else if (row == OTHER_PRIVACY_INDEX)
        {
            MXKTableViewCellWithLabelAndTextField *privacyPolicyCell = [self getLabelAndTextFieldCell:tableView];
            
            privacyPolicyCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_privacy_policy", @"Vector", nil);
            privacyPolicyCell.mxkTextField.userInteractionEnabled = NO;
            privacyPolicyCell.mxkTextField.text = nil;
            
            cell = privacyPolicyCell;
        }
        else if (row == OTHER_CLEAR_CACHE_INDEX)
        {
            MXKTableViewCellWithButton *clearCacheBtnCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithButton defaultReuseIdentifier]];
            if (!clearCacheBtnCell)
            {
                clearCacheBtnCell = [[MXKTableViewCellWithButton alloc] init];
            }
            
            NSString *btnTitle = [NSString stringWithFormat:@"%@", NSLocalizedStringFromTable(@"settings_clear_cache", @"Vector", nil)];
            [clearCacheBtnCell.mxkButton setTitle:btnTitle forState:UIControlStateNormal];
            [clearCacheBtnCell.mxkButton setTitle:btnTitle forState:UIControlStateHighlighted];
            
            [clearCacheBtnCell.mxkButton removeTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
            [clearCacheBtnCell.mxkButton addTarget:self action:@selector(onClearCache:) forControlEvents:UIControlEventTouchUpInside];
            
            cell = clearCacheBtnCell;
        }
    }
    
    return cell;
}

#pragma mark - UITableView delegate

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 50;
}

- (CGFloat) tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    if (section == SETTINGS_SECTION_SIGN_OUT_INDEX)
    {
        return 30;
    }
    
    return 60;
}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    UIView *sectionHeader = [[UIView alloc] initWithFrame:[tableView rectForHeaderInSection:section]];
    sectionHeader.backgroundColor = VECTOR_LIGHT_GRAY_COLOR;
    
    if (section == SETTINGS_SECTION_SIGN_OUT_INDEX)
    {
        return sectionHeader;
    }
    
    UILabel *sectionLabel = [[UILabel alloc] init];
    sectionLabel.font = [UIFont boldSystemFontOfSize:16];
    sectionLabel.backgroundColor = [UIColor clearColor];
    
    if (section == SETTINGS_SECTION_USER_SETTINGS_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"settings_user_settings", @"Vector", nil);
    }
    else if (section == SETTINGS_SECTION_NOTIFICATIONS_SETTINGS_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"settings_notifications_settings", @"Vector", nil);
    }
    else if (section == SETTINGS_SECTION_OTHER_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"settings_other", @"Vector", nil);
    }
    
    [sectionLabel sizeToFit];
    sectionLabel.frame = CGRectMake(10,  sectionHeader.frame.size.height - sectionLabel.frame.size.height - 5, sectionHeader.frame.size.width - 20, sectionLabel.frame.size.height);
    [sectionHeader addSubview:sectionLabel];

    return sectionHeader;
}

- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (self.tableView == aTableView)
    {
        NSInteger section = indexPath.section;
        NSInteger row = indexPath.row;
        
        if (section == SETTINGS_SECTION_OTHER_INDEX)
        {
           if (row == OTHER_TERM_CONDITIONS_INDEX)
           {
               UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:nil delegate:nil cancelButtonTitle:NSLocalizedStringFromTable(@"cancel", @"Vector", nil) otherButtonTitles:nil, nil];
               [alertView setMessage:NSLocalizedStringFromTable(@"settings_term_conditions", @"Vector", nil)];
               [alertView show];
           }
           else if (row == OTHER_PRIVACY_INDEX)
           {
                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:nil delegate:nil cancelButtonTitle:NSLocalizedStringFromTable(@"cancel", @"Vector", nil) otherButtonTitles:nil, nil];
                [alertView setMessage:NSLocalizedStringFromTable(@"settings_privacy_policy", @"Vector", nil)];
                [alertView show];
           }
        }
        else if (section == SETTINGS_SECTION_USER_SETTINGS_INDEX)
        {
            if (row == USER_SETTINGS_PROFILE_PICTURE_INDEX)
            {
                mediaPicker = [MediaPickerViewController mediaPickerViewController];
                mediaPicker.mediaTypes = @[(NSString *)kUTTypeImage];
                mediaPicker.multipleSelections = NO;
                mediaPicker.selectionButtonCustomLabel = NSLocalizedStringFromTable(@"media_picker_attach", @"Vector", nil);
                mediaPicker.delegate = self;
                UINavigationController *navigationController = [UINavigationController new];
                [navigationController pushViewController:mediaPicker animated:NO];
                
                [self presentViewController:navigationController animated:YES completion:nil];
            }
        }

        [aTableView deselectRowAtIndexPath:indexPath animated:YES];
    }
}

#pragma mark - actions

- (void)onSignout:(id)sender
{
   [[MXKAccountManager sharedManager] logout];
}

- (void)onClearCache:(id)sender
{
    [[AppDelegate theDelegate] reloadMatrixSessions:YES];
}

- (void)onRuleUpdate:(id)sender
{
    MXPushRule* pushRule = nil;
    MXSession* session = [[AppDelegate theDelegate].mxSessions objectAtIndex:0];
    MXKAccount* account = [MXKAccountManager sharedManager].activeAccounts.firstObject;
    
    NSInteger row = ((UIView*)sender).tag;
    
    if (row == NOTIFICATION_SETTINGS_ENABLE_ALL_INDEX)
    {
        [self startActivityIndicator];
        
        // toggle the pushes
        [account setEnablePushNotifications:!account.pushNotificationServiceIsActive];
    }
    else if (row == NOTIFICATION_SETTINGS_CONTAINING_MY_NAME_INDEX)
    {
        pushRule = [session.notificationCenter ruleById:kMXNotificationCenterContainDisplayNameRuleID];
    }
    else if (row == NOTIFICATION_SETTINGS_SENT_TO_ME_INDEX)
    {
        pushRule = [session.notificationCenter ruleById:kMXNotificationCenterOneToOneRoomRuleID];
    }
    else if (row == NOTIFICATION_SETTINGS_INVITED_TO_ROOM_INDEX)
    {
        pushRule = [session.notificationCenter ruleById:kMXNotificationCenterInviteMeRuleID];
    }
    else if (row == NOTIFICATION_SETTINGS_PEOPLE_LEAVE_JOIN_INDEX)
    {
        pushRule = [session.notificationCenter ruleById:kMXNotificationCenterMemberEventRuleID];
    }
    else if (row == NOTIFICATION_SETTINGS_CALL_INVITATION_INDEX)
    {
        pushRule = [session.notificationCenter ruleById:kMXNotificationCenterCallRuleID];
    }
    
    if (pushRule)
    {
        // toggle the rule
        [session.notificationCenter enableRule:pushRule isEnabled:!pushRule.enabled];
    }
}

#pragma mark - MediaPickerViewController Delegate

- (void)dismissMediaPicker
{
    if (mediaPicker)
    {
        [mediaPicker withdrawViewControllerAnimated:YES completion:nil];
        mediaPicker = nil;
    }
}

- (void)mediaPickerController:(MediaPickerViewController *)mediaPickerController didSelectImage:(UIImage*)image withURL:(NSURL *)imageURL
{
    [self dismissMediaPicker];
    
    newThumbnailImage = image;
    newThumbnailimageURL = imageURL;
    
    [self.tableView reloadData];
}

- (void)mediaPickerController:(MediaPickerViewController *)mediaPickerController didSelectVideo:(NSURL*)videoURL isCameraRecording:(BOOL)isCameraRecording
{
    // this method should not be called
    [self dismissMediaPicker];
}

- (void)mediaPickerController:(MediaPickerViewController *)mediaPickerController didSelectAssets:(NSArray *)assets
{
    // this method should not be called
    [self dismissMediaPicker];
}


@end