/*
 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"

#define SETTINGS_SECTION_ACCOUNTS_INDEX      0
#define SETTINGS_SECTION_CONTACTS_INDEX      1
#define SETTINGS_SECTION_ROOMS_INDEX         2
#define SETTINGS_SECTION_CONFIGURATION_INDEX 3
#define SETTINGS_SECTION_COMMANDS_INDEX      4
#define SETTINGS_SECTION_COUNT               5

#define SETTINGS_SECTION_ROOMS_DISPLAY_ALL_EVENTS_INDEX         0
#define SETTINGS_SECTION_ROOMS_SHOW_REDACTIONS_INDEX            1
#define SETTINGS_SECTION_ROOMS_SHOW_UNSUPPORTED_EVENTS_INDEX    2
#define SETTINGS_SECTION_ROOMS_SORT_MEMBERS_INDEX               3
#define SETTINGS_SECTION_ROOMS_DISPLAY_LEFT_MEMBERS_INDEX       4
#define SETTINGS_SECTION_ROOMS_SET_CACHE_SIZE_INDEX             5
#define SETTINGS_SECTION_ROOMS_CLEAR_CACHE_INDEX                6
#define SETTINGS_SECTION_ROOMS_INDEX_COUNT                      7

@interface SettingsViewController ()
{
    MXKAccount *selectedAccount;
    id removedAccountObserver;
    id accountUserInfoObserver;
    
    // Contacts
    UISwitch *contactsSyncSwitch;
    // Country codes management
    NSArray* countryCodes;
    NSString* countryCode;
    NSString* selectedCountryCode;
    BOOL isSelectingCountryCode;
    // Dynamic rows in Contacts section
    NSInteger syncLocalContactsRowIndex;
    NSInteger countryCodeRowIndex;
    
    // Rooms settings
    UISwitch *allEventsSwitch;
    UISwitch *redactionsSwitch;
    UISwitch *unsupportedEventsSwitch;
    UISwitch *sortMembersSwitch;
    UISwitch *displayLeftMembersSwitch;
    MXKTableViewCellWithLabelAndSlider* maxCacheSizeCell;
    NSUInteger minimumCacheSize;
    UIButton *clearCacheButton;
}

@end

@implementation SettingsViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    // Consider the standard settings by default
    _settings = [MXKAppSettings standardAppSettings];
    
    // Initialize the minimum cache size with the current value
    minimumCacheSize = self.minCachesSize;
    
    // country selection
    NSString *path = [[NSBundle mainBundle] pathForResource:@"countryCodes" ofType:@"plist"];
    countryCodes = [NSArray arrayWithContentsOfFile:path];
    isSelectingCountryCode = NO;
    
    // Setup `MXKRoomMemberListViewController` properties
    self.rageShakeManager = [RageShakeManager sharedManager];
    
    // 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) {
        
        // Refresh table to remove this account
        [self.tableView reloadData];
    }];
}

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

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

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    if (!_settings)
    {
        // Consider the standard settings by default
        _settings = [MXKAppSettings standardAppSettings];
    }
    
    selectedCountryCode = countryCode = [_settings phonebookCountryCode];
    
    // Update the minimum cache size with the current value
    // Dispatch this operation to not freeze the app
    dispatch_async(dispatch_get_main_queue(), ^{
        minimumCacheSize = self.minCachesSize;
    });
    
    // Refresh display
    [self.tableView reloadData];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    // if country has been updated
    // update the contact phonenumbers
    // and check if they match now to Matrix Users
    if (![countryCode isEqualToString:selectedCountryCode])
    {
        
        [_settings setPhonebookCountryCode:selectedCountryCode];
        countryCode = selectedCountryCode;
    }
    
    countryCode = [_settings phonebookCountryCode];
}

#pragma mark - Internal methods

- (void)reset
{
    // Remove observers
    if (removedAccountObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:removedAccountObserver];
        removedAccountObserver = nil;
    }
    
    if (accountUserInfoObserver)
    {
        [[NSNotificationCenter defaultCenter] removeObserver:accountUserInfoObserver];
        accountUserInfoObserver = nil;
    }
    
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    
    selectedAccount = nil;
    
    contactsSyncSwitch = nil;
    
    allEventsSwitch = nil;
    redactionsSwitch = nil;
    unsupportedEventsSwitch = nil;
    sortMembersSwitch = nil;
    displayLeftMembersSwitch = nil;
    maxCacheSizeCell = nil;
    clearCacheButton = nil;
}

- (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 - Actions

- (IBAction)addAccount:(id)sender
{
    [self performSegueWithIdentifier:@"addAccount" sender:self];
}

- (IBAction)logout:(id)sender
{
    [[AppDelegate theDelegate] logout];
}

- (IBAction)onButtonPressed:(id)sender
{
    if (sender == allEventsSwitch)
    {
        _settings.showAllEventsInRoomHistory = allEventsSwitch.on;
    }
    else if (sender == redactionsSwitch)
    {
        _settings.showRedactionsInRoomHistory = redactionsSwitch.on;
    }
    else if (sender == unsupportedEventsSwitch)
    {
        _settings.showUnsupportedEventsInRoomHistory = unsupportedEventsSwitch.on;
    }
    else if (sender == sortMembersSwitch)
    {
        _settings.sortRoomMembersUsingLastSeenTime = sortMembersSwitch.on;
    }
    else if (sender == displayLeftMembersSwitch)
    {
        _settings.showLeftMembersInRoomMemberList = displayLeftMembersSwitch.on;
    }
    else if (sender == contactsSyncSwitch)
    {
        _settings.syncLocalContacts = contactsSyncSwitch.on;
        isSelectingCountryCode = NO;
        
        dispatch_async(dispatch_get_main_queue(), ^{
            [self.tableView reloadData];
        });
    }
    else if (sender == clearCacheButton)
    {
        [[AppDelegate theDelegate] reloadMatrixSessions:YES];
    }
}

- (IBAction)onSliderValueChange:(id)sender
{
    if (sender == maxCacheSizeCell.mxkSlider)
    {
        UISlider* slider = maxCacheSizeCell.mxkSlider;
        
        // check if the upper bounds have been updated
        if (slider.maximumValue != self.maxAllowedCachesSize)
        {
            slider.maximumValue = self.maxAllowedCachesSize;
        }
        
        // check if the value does not exceed the bounds
        if (slider.value < minimumCacheSize)
        {
            slider.value = minimumCacheSize;
        }
        
        [self setCurrentMaxCachesSize:slider.value];
        
        maxCacheSizeCell.mxkLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"settings_max_cache_size", @"MatrixConsole", nil), [NSByteCountFormatter stringFromByteCount:self.currentMaxCachesSize countStyle:NSByteCountFormatterCountStyleFile]];
    }
}

#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_ACCOUNTS_INDEX)
    {
        count = [[MXKAccountManager sharedManager] accounts].count + 1; // Add one cell in this section to display "logout all" option.
    }
    else if (section == SETTINGS_SECTION_CONTACTS_INDEX)
    {
        countryCodeRowIndex = syncLocalContactsRowIndex = -1;
        
        // init row index
        syncLocalContactsRowIndex = count++;
        if ([_settings syncLocalContacts])
        {
            countryCodeRowIndex = count++;
        }
    }
    else if (section == SETTINGS_SECTION_ROOMS_INDEX)
    {
        count = SETTINGS_SECTION_ROOMS_INDEX_COUNT;
    }
    else if (section == SETTINGS_SECTION_CONFIGURATION_INDEX)
    {
        count = 1;
    }
    else if (section == SETTINGS_SECTION_COMMANDS_INDEX)
    {
        count = 1;
    }
    
    return count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = nil;
    
    if (indexPath.section == SETTINGS_SECTION_ACCOUNTS_INDEX)
    {
        NSArray *accounts = [[MXKAccountManager sharedManager] accounts];
        if (indexPath.row < accounts.count)
        {
            MXKAccountTableViewCell *accountCell = [tableView dequeueReusableCellWithIdentifier:[MXKAccountTableViewCell defaultReuseIdentifier]];
            if (!accountCell)
            {
                accountCell = [[MXKAccountTableViewCell alloc] init];
            }
            
            accountCell.mxAccount = [accounts objectAtIndex:indexPath.row];
            
            // Display switch toggle in case of multiple accounts
            if (accounts.count > 1 || accountCell.mxAccount.disabled)
            {
                accountCell.accountSwitchToggle.tag = indexPath.row;
                accountCell.accountSwitchToggle.hidden = NO;
                [accountCell.accountSwitchToggle addTarget:self action:@selector(onAccountToggleChange:) forControlEvents:UIControlEventValueChanged];
            }
            
            cell = accountCell;
        }
        else
        {
            MXKTableViewCellWithButton *logoutBtnCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithButton defaultReuseIdentifier]];
            if (!logoutBtnCell)
            {
                logoutBtnCell = [[MXKTableViewCellWithButton alloc] init];
            }
            [logoutBtnCell.mxkButton setTitle:NSLocalizedStringFromTable(@"account_logout_all", @"MatrixConsole", nil) forState:UIControlStateNormal];
            [logoutBtnCell.mxkButton setTitle:NSLocalizedStringFromTable(@"account_logout_all", @"MatrixConsole", nil) forState:UIControlStateHighlighted];
            
            [logoutBtnCell.mxkButton removeTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
            [logoutBtnCell.mxkButton addTarget:self action:@selector(logout:) forControlEvents:UIControlEventTouchUpInside];
            
            cell = logoutBtnCell;
        }
    }
    else if (indexPath.section == SETTINGS_SECTION_CONTACTS_INDEX)
    {
        if (indexPath.row  == syncLocalContactsRowIndex)
        {
            MXKTableViewCellWithLabelAndSwitch *contactsCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithLabelAndSwitch defaultReuseIdentifier]];
            if (!contactsCell)
            {
                contactsCell = [[MXKTableViewCellWithLabelAndSwitch alloc] init];
            }
            
            [contactsCell.mxkSwitch addTarget:self action:@selector(onButtonPressed:) forControlEvents:UIControlEventValueChanged];
            
            contactsCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_contact_sync", @"MatrixConsole", nil);
            contactsCell.mxkSwitch.on = [_settings syncLocalContacts];
            contactsSyncSwitch = contactsCell.mxkSwitch;
            cell = contactsCell;
        }
        else if (indexPath.row  == countryCodeRowIndex)
        {
            int index = 0;
            NSString* countryName = @"";
            
            for(NSDictionary* dict in countryCodes)
            {
                if ([[dict valueForKey:@"id"] isEqualToString:selectedCountryCode])
                {
                    countryName = [dict valueForKey:@"country"];
                    break;
                }
                
                index++;
            }
            
            // there is no country code selection
            if (!isSelectingCountryCode)
            {
                MXKTableViewCellWithLabelAndSubLabel *countryCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithLabelAndSubLabel defaultReuseIdentifier]];
                if (!countryCell)
                {
                    countryCell = [[MXKTableViewCellWithLabelAndSubLabel alloc] init];
                }
                
                countryCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_country_select", @"MatrixConsole", nil);
                countryCell.mxkSublabel.text = countryName;
                countryCell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
                cell = countryCell;
                
            }
            else
            {
                // there is a selection in progress
                MXKTableViewCellWithPicker *pickerCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithPicker defaultReuseIdentifier]];
                if (!pickerCell)
                {
                    pickerCell = [[MXKTableViewCellWithPicker alloc] init];
                }
                
                // display a picker
                pickerCell.mxkPickerView.delegate = self;
                pickerCell.mxkPickerView.dataSource = self;
                
                if (countryName.length > 0)
                {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        [pickerCell.mxkPickerView selectRow:index inComponent:0 animated:NO];
                    });
                }
                
                cell = pickerCell;
            }
        }
        
    }
    else if (indexPath.section == SETTINGS_SECTION_ROOMS_INDEX)
    {
        if (indexPath.row == SETTINGS_SECTION_ROOMS_CLEAR_CACHE_INDEX)
        {
            MXKTableViewCellWithButton *clearCacheBtnCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithButton defaultReuseIdentifier]];
            if (!clearCacheBtnCell)
            {
                clearCacheBtnCell = [[MXKTableViewCellWithButton alloc] init];
            }
            
            NSString *btnTitle = [NSString stringWithFormat:@"%@ (%@)", NSLocalizedStringFromTable(@"settings_clear_cache", @"MatrixConsole", nil), [NSByteCountFormatter stringFromByteCount:self.cachesSize countStyle:NSByteCountFormatterCountStyleFile]];
            [clearCacheBtnCell.mxkButton setTitle:btnTitle forState:UIControlStateNormal];
            [clearCacheBtnCell.mxkButton setTitle:btnTitle forState:UIControlStateHighlighted];
            
            clearCacheButton = clearCacheBtnCell.mxkButton;
            
            [clearCacheButton removeTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
            [clearCacheButton addTarget:self action:@selector(onButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
            
            cell = clearCacheBtnCell;
        }
        else if (indexPath.row == SETTINGS_SECTION_ROOMS_SET_CACHE_SIZE_INDEX)
        {
            maxCacheSizeCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithLabelAndSlider defaultReuseIdentifier]];
            if (!maxCacheSizeCell)
            {
                maxCacheSizeCell = [[MXKTableViewCellWithLabelAndSlider alloc] init];
            }
            
            maxCacheSizeCell.mxkSlider.minimumValue = 0;
            maxCacheSizeCell.mxkSlider.maximumValue = self.maxAllowedCachesSize;
            maxCacheSizeCell.mxkSlider.value = self.currentMaxCachesSize;
            
            [self onSliderValueChange:maxCacheSizeCell.mxkSlider];
            
            [maxCacheSizeCell.mxkSlider addTarget:self action:@selector(onSliderValueChange:) forControlEvents:UIControlEventValueChanged];
            cell = maxCacheSizeCell;
        }
        else
        {
            MXKTableViewCellWithLabelAndSwitch *roomsSettingCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithLabelAndSwitch defaultReuseIdentifier]];
            if (!roomsSettingCell)
            {
                roomsSettingCell = [[MXKTableViewCellWithLabelAndSwitch alloc] init];
            }
            
            [roomsSettingCell.mxkSwitch addTarget:self action:@selector(onButtonPressed:) forControlEvents:UIControlEventValueChanged];
            
            if (indexPath.row == SETTINGS_SECTION_ROOMS_DISPLAY_ALL_EVENTS_INDEX)
            {
                roomsSettingCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_display_all_events", @"MatrixConsole", nil);
                roomsSettingCell.mxkSwitch.on = [_settings showAllEventsInRoomHistory];
                allEventsSwitch = roomsSettingCell.mxkSwitch;
            }
            else if (indexPath.row == SETTINGS_SECTION_ROOMS_SHOW_REDACTIONS_INDEX)
            {
                roomsSettingCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_show_redactions", @"MatrixConsole", nil);
                roomsSettingCell.mxkSwitch.on = [_settings showRedactionsInRoomHistory];
                redactionsSwitch = roomsSettingCell.mxkSwitch;
            }
            else if (indexPath.row == SETTINGS_SECTION_ROOMS_SHOW_UNSUPPORTED_EVENTS_INDEX)
            {
                roomsSettingCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_show_unsupported_events", @"MatrixConsole", nil);
                roomsSettingCell.mxkSwitch.on = [_settings showUnsupportedEventsInRoomHistory];
                unsupportedEventsSwitch = roomsSettingCell.mxkSwitch;
            }
            else if (indexPath.row == SETTINGS_SECTION_ROOMS_SORT_MEMBERS_INDEX)
            {
                roomsSettingCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_sort_by_last_seen", @"MatrixConsole", nil);
                roomsSettingCell.mxkSwitch.on = [_settings sortRoomMembersUsingLastSeenTime];
                sortMembersSwitch = roomsSettingCell.mxkSwitch;
            }
            else if (indexPath.row == SETTINGS_SECTION_ROOMS_DISPLAY_LEFT_MEMBERS_INDEX)
            {
                roomsSettingCell.mxkLabel.text = NSLocalizedStringFromTable(@"settings_display_left_members", @"MatrixConsole", nil);
                roomsSettingCell.mxkSwitch.on = [_settings showLeftMembersInRoomMemberList];
                displayLeftMembersSwitch = roomsSettingCell.mxkSwitch;
            }
            
            cell = roomsSettingCell;
        }
    }
    else if (indexPath.section == SETTINGS_SECTION_CONFIGURATION_INDEX)
    {
        MXKTableViewCellWithTextView *configurationCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithTextView defaultReuseIdentifier]];
        if (!configurationCell)
        {
            configurationCell = [[MXKTableViewCellWithTextView alloc] init];
        }
        
        NSString* appVersion = [AppDelegate theDelegate].appVersion;
        NSString* build = [AppDelegate theDelegate].build;
        if (build.length)
        {
            build = [NSString stringWithFormat:NSLocalizedStringFromTable(@"settings_config_build_number", @"MatrixConsole", nil), build];
        }
        NSString *configurationFormatText = [NSString stringWithFormat:@"%@\n%@\n%@\n%@", NSLocalizedStringFromTable(@"settings_config_ios_console_version", @"MatrixConsole", nil), NSLocalizedStringFromTable(@"settings_config_ios_kit_version", @"MatrixConsole", nil), NSLocalizedStringFromTable(@"settings_config_ios_sdk_version", @"MatrixConsole", nil), @"%@"];
        configurationCell.mxkTextView.text = [NSString stringWithFormat:configurationFormatText, appVersion, MatrixKitVersion, MatrixSDKVersion, build];
        cell = configurationCell;
    }
    else if (indexPath.section == SETTINGS_SECTION_COMMANDS_INDEX)
    {
        MXKTableViewCellWithTextView *commandsCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCellWithTextView defaultReuseIdentifier]];
        if (!commandsCell)
        {
            commandsCell = [[MXKTableViewCellWithTextView alloc] init];
        }
        
        commandsCell.mxkTextView.text = NSLocalizedStringFromTable(@"settings_command_commands", @"MatrixConsole", nil);
        cell = commandsCell;
    }
    
    return cell;
}

#pragma mark - UITableView delegate

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.section == SETTINGS_SECTION_ACCOUNTS_INDEX)
    {
        return 50;
    }
    else if (indexPath.section == SETTINGS_SECTION_CONTACTS_INDEX)
    {
        
        if ((indexPath.row == countryCodeRowIndex) && isSelectingCountryCode)
        {
            
            return 164;
        }
    }
    else if (indexPath.section == SETTINGS_SECTION_ROOMS_INDEX)
    {
        if (indexPath.row == SETTINGS_SECTION_ROOMS_SET_CACHE_SIZE_INDEX)
        {
            return 88;
        }
    }
    else if (indexPath.section == SETTINGS_SECTION_CONFIGURATION_INDEX)
    {
        UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, MAXFLOAT)];
        textView.font = [UIFont systemFontOfSize:14];
        NSString* appVersion = [AppDelegate theDelegate].appVersion;
        NSString* build = [AppDelegate theDelegate].build;
        if (build.length)
        {
            build = [NSString stringWithFormat:NSLocalizedStringFromTable(@"settings_config_build_number", @"MatrixConsole", nil), build];
        }
        NSString *configurationFormatText = [NSString stringWithFormat:@"%@\n%@\n%@\n%@", NSLocalizedStringFromTable(@"settings_config_ios_console_version", @"MatrixConsole", nil), NSLocalizedStringFromTable(@"settings_config_ios_kit_version", @"MatrixConsole", nil), NSLocalizedStringFromTable(@"settings_config_ios_sdk_version", @"MatrixConsole", nil), @"%@"];
        textView.text = [NSString stringWithFormat:configurationFormatText, appVersion, MatrixKitVersion, MatrixSDKVersion, build];
        CGSize contentSize = [textView sizeThatFits:textView.frame.size];
        return contentSize.height + 1;
    }
    else if (indexPath.section == SETTINGS_SECTION_COMMANDS_INDEX)
    {
        UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, MAXFLOAT)];
        textView.font = [UIFont systemFontOfSize:14];
        textView.text = NSLocalizedStringFromTable(@"settings_command_commands", @"MatrixConsole", nil);
        CGSize contentSize = [textView sizeThatFits:textView.frame.size];
        return contentSize.height + 1;
    }
    
    return 44;
}

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

- (CGFloat) tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
    return 1;
}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    UIView *sectionHeader = [[UIView alloc] initWithFrame:[tableView rectForHeaderInSection:section]];
    sectionHeader.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1.0];
    UILabel *sectionLabel = [[UILabel alloc] initWithFrame:CGRectMake(5, 5, sectionHeader.frame.size.width - 10, sectionHeader.frame.size.height - 10)];
    sectionLabel.font = [UIFont boldSystemFontOfSize:16];
    sectionLabel.backgroundColor = [UIColor clearColor];
    [sectionHeader addSubview:sectionLabel];
    
    if (section == SETTINGS_SECTION_ACCOUNTS_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"accounts", @"MatrixConsole", nil);
        
        UIButton *addAccount = [UIButton buttonWithType:UIButtonTypeContactAdd];
        [addAccount addTarget:self action:@selector(addAccount:) forControlEvents:UIControlEventTouchUpInside];
        
        CGRect frame = addAccount.frame;
        frame.origin.x = sectionHeader.frame.size.width - frame.size.width - 8;
        frame.origin.y = (sectionHeader.frame.size.height - frame.size.height) / 2;
        addAccount.frame = frame;
        
        [sectionHeader addSubview:addAccount];
        addAccount.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin);
        
        sectionHeader.userInteractionEnabled = YES;
    }
    else if (section == SETTINGS_SECTION_CONTACTS_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"contacts", @"MatrixConsole", nil);
    }
    else if (section == SETTINGS_SECTION_ROOMS_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"settings_title_rooms", @"MatrixConsole", nil);
    }
    else if (section == SETTINGS_SECTION_CONFIGURATION_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"settings_title_config", @"MatrixConsole", nil);
    }
    else if (section == SETTINGS_SECTION_COMMANDS_INDEX)
    {
        sectionLabel.text = NSLocalizedStringFromTable(@"settings_title_commands", @"MatrixConsole", nil);
    }
    else
    {
        sectionHeader = nil;
    }
    return sectionHeader;
}

- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (self.tableView == aTableView)
    {
        if (indexPath.section == SETTINGS_SECTION_ACCOUNTS_INDEX)
        {
            NSArray *accounts = [[MXKAccountManager sharedManager] accounts];
            if (indexPath.row < accounts.count)
            {
                selectedAccount = [accounts objectAtIndex:indexPath.row];
                
                [self performSegueWithIdentifier:@"showAccountDetails" sender:self];
            }
        }
        else if (indexPath.section == SETTINGS_SECTION_CONTACTS_INDEX)
        {
            if (indexPath.row == countryCodeRowIndex)
            {
                isSelectingCountryCode = YES;
                
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.tableView reloadData];
                });
            }
        }
        [aTableView deselectRowAtIndexPath:indexPath animated:YES];
    }
}

#pragma mark - UIPickerViewDataSource

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return [countryCodes count];
}

#pragma mark - UIPickerViewDelegate

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return [[countryCodes objectAtIndex:row] valueForKey:@"country"];
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    // sanity check
    if ((row >= 0) && (row < countryCodes.count))
    {
        NSDictionary* dict = [countryCodes objectAtIndex:row];
        selectedCountryCode = [dict valueForKey:@"id"];
    }
    
    isSelectingCountryCode = NO;
    
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tableView reloadData];
    });
}

#pragma mark - Cache handling

// return the MX cache size in bytes
- (NSUInteger)MXCacheSize
{
    NSUInteger cacheSize = 0;
    
    NSArray *mxSessions = self.mxSessions;
    for (MXSession *mxSession in mxSessions)
    {
        if (mxSession.store && [mxSession.store isKindOfClass:[MXFileStore class]])
        {
            MXFileStore *fileStore = (MXFileStore*)mxSession.store;
            cacheSize += fileStore.diskUsage;
        }
    }
    
    return cacheSize;
}

// return the sum of the caches (MX cache + media cache ...) in bytes
- (NSUInteger)cachesSize
{
    return self.MXCacheSize + [MXKMediaManager cacheSize];
}

// defines the min allow cache size in bytes
- (NSUInteger)minCachesSize
{
    // add a 50MB margin to avoid cache file deletion
    return self.MXCacheSize + [MXKMediaManager minCacheSize] + 50 * 1024 * 1024;
}

// defines the current max caches size in bytes
- (NSUInteger)currentMaxCachesSize
{
    return self.MXCacheSize + [MXKMediaManager currentMaxCacheSize];
}

- (void)setCurrentMaxCachesSize:(NSUInteger)maxCachesSize
{
    [MXKMediaManager setCurrentMaxCacheSize:maxCachesSize - self.MXCacheSize];
}

// defines the max allowed caches size in bytes
- (NSUInteger) maxAllowedCachesSize
{
    return self.MXCacheSize + [MXKMediaManager maxAllowedCacheSize];
}

@end