//
//  MessageComposeTableViewController.m
//
//
//  Created by Dylan Bourgeois on 02/11/14.
//
//

#import "MessageComposeTableViewController.h"
#import "Environment.h"
#import "NotificationManifest.h"
#import "PhoneNumberDirectoryFilterManager.h"

#import <MessageUI/MessageUI.h>

#import "ContactTableViewCell.h"
#import "UIColor+OWS.h"
#import "UIUtil.h"

@interface MessageComposeTableViewController () <UISearchBarDelegate, UISearchResultsUpdating, MFMessageComposeViewControllerDelegate>
{
    UIButton* sendTextButton;
    NSString* currentSearchTerm;
    NSArray* contacts;
    NSArray* searchResults;
}

@property (nonatomic, strong) UISearchController *searchController;
@property (nonatomic, strong) UIActivityIndicatorView *activityIndicator;
@property (nonatomic, strong) UIBarButtonItem *addGroup;
@property (nonatomic, strong) UIView *loadingBackgroundView;
@property (nonatomic, strong) UIView *emptyBackgroundView;

@end

@implementation MessageComposeTableViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.navigationController.navigationBar setTranslucent:NO];
    
    contacts = [[Environment getCurrent] contactsManager].signalContacts;
    searchResults = contacts;
    [self initializeSearch];
    
    self.searchController.searchBar.hidden = NO;
    self.searchController.searchBar.backgroundColor = [UIColor whiteColor];
    
    self.tableView.tableFooterView = [[UIView alloc]initWithFrame:CGRectZero];
    [self createLoadingAndBackgroundViews];
    self.title = NSLocalizedString(@"MESSAGE_COMPOSEVIEW_TITLE", @"");
}

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


-(void) viewDidAppear:(BOOL)animated  {
    [super viewDidAppear:animated];
    
    BOOL isRefreshing = [Environment getCurrent].phoneDirectoryManager.isRefreshing;
    if([contacts count]==0) {
        if([Environment getCurrent].phoneDirectoryManager.isRefreshing) {
            [self showLoadingBackgroundView:YES];
        }
        else {
            [self showEmptyBackgroundView:YES];
        }
    }
    else if(isRefreshing) {
        self.tableView.contentOffset = CGPointMake(0, -self.refreshControl.frame.size.height);
        [self.refreshControl beginRefreshing];
    }
}

-(UILabel*) createLabelWithFirstLine:(NSString*) firstLine andSecondLine:(NSString*)secondLine {
    UILabel *label = [[UILabel alloc] init];
    label.textColor = [UIColor grayColor];
    label.font = [UIFont ows_regularFontWithSize:18.f];
    label.textAlignment = NSTextAlignmentCenter;
    label.numberOfLines = 4;
    
    NSMutableAttributedString *fullLabelString = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@\n%@",firstLine,secondLine]];
    
    [fullLabelString addAttribute:NSFontAttributeName value:[UIFont ows_boldFontWithSize:15.f] range:NSMakeRange(0,firstLine.length)];
    [fullLabelString addAttribute:NSFontAttributeName value:[UIFont ows_regularFontWithSize:14.f] range:NSMakeRange(firstLine.length + 1, secondLine.length)];
    [fullLabelString addAttribute:NSForegroundColorAttributeName value:[UIColor blackColor] range:NSMakeRange(0,firstLine.length)];
    [fullLabelString addAttribute:NSForegroundColorAttributeName value:[UIColor ows_darkGrayColor] range:NSMakeRange(firstLine.length + 1, secondLine.length)];
    label.attributedText = fullLabelString;
    //250, 66, 140
    [label setFrame:CGRectMake([self marginSize], 100+140, [self contentWidth], 66)];
    return label;
}

-(UIButton*) createButtonWithTitle:(NSString*)title {
    NSDictionary* buttonTextAttributes = @{NSFontAttributeName:[UIFont ows_regularFontWithSize:15.0f],
                                           NSForegroundColorAttributeName:[UIColor ows_materialBlueColor]};
    UIButton* button = [[UIButton alloc] initWithFrame:CGRectMake(0,0,65,24)];
    NSMutableAttributedString *attributedTitle = [[NSMutableAttributedString alloc] initWithString:title];
    [attributedTitle setAttributes:buttonTextAttributes range:NSMakeRange(0, [attributedTitle length])];
    [button setAttributedTitle:attributedTitle forState:UIControlStateNormal];
    [button.titleLabel setTextAlignment:NSTextAlignmentCenter];
    return button;
}

-(void) createLoadingAndBackgroundViews {
    // This will be further tweaked per design recs. It must currently be hardcoded (or we can place in separate .xib I suppose) as the controller must be a TableViewController to have access to the native pull to refresh capabilities. That means we can't do a UIView in the storyboard
    _loadingBackgroundView = [[UIView alloc] initWithFrame:self.tableView.frame];
    UIImageView *loadingImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"uiEmpty"]];
    [loadingImageView setBackgroundColor:[UIColor whiteColor]];
    [loadingImageView setContentMode:UIViewContentModeCenter];
    [loadingImageView  setFrame:CGRectMake(self.tableView.frame.size.width/2.0f-115.0f/2.0f, 100, 115, 110)];
    loadingImageView.contentMode = UIViewContentModeCenter;
    loadingImageView.contentMode = UIViewContentModeScaleAspectFit;
    
    UIActivityIndicatorView *loadingProgressView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
    [loadingProgressView setFrame:CGRectMake(self.tableView.frame.size.width/2.0f-loadingProgressView.frame.size.width/2.0f, 100+110/2.0f-loadingProgressView.frame.size.height/2.0f, loadingProgressView.frame.size.width, loadingProgressView.frame.size.height)];
    [loadingProgressView setHidesWhenStopped:NO];
    [loadingProgressView startAnimating];
    UILabel *loadingLabel = [self createLabelWithFirstLine:NSLocalizedString(@"LOADING_CONTACTS_LABEL_LINE1", @"") andSecondLine:NSLocalizedString(@"LOADING_CONTACTS_LABEL_LINE2" , @"")];
    [_loadingBackgroundView addSubview:loadingImageView];
    [_loadingBackgroundView addSubview:loadingProgressView];
    [_loadingBackgroundView addSubview:loadingLabel];
    
    _emptyBackgroundView = [[UIView alloc] initWithFrame:self.tableView.frame];
    UIImageView *emptyImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"uiEmptyContact"]];
    [emptyImageView setBackgroundColor:[UIColor whiteColor]];
    [emptyImageView setContentMode:UIViewContentModeCenter];
    [emptyImageView setFrame:CGRectMake(self.tableView.frame.size.width/2.0f-115.0f/2.0f, 100, 115, 110)];
    emptyImageView.contentMode = UIViewContentModeCenter;
    emptyImageView.contentMode = UIViewContentModeScaleAspectFit;
    UILabel *emptyLabel = [self createLabelWithFirstLine:NSLocalizedString(@"EMPTY_CONTACTS_LABEL_LINE1", @"") andSecondLine:NSLocalizedString(@"EMPTY_CONTACTS_LABEL_LINE2" , @"")];
    
    UIButton *inviteContactButton = [self createButtonWithTitle:NSLocalizedString(@"EMPTY_CONTACTS_INVITE_BUTTON", @"")];
    
    [inviteContactButton addTarget:self action:@selector(sendText) forControlEvents:UIControlEventTouchUpInside];
    [inviteContactButton setFrame:CGRectMake([self marginSize], self.tableView.frame.size.height - 200, [self contentWidth],60)];
    [inviteContactButton.titleLabel setTextAlignment:NSTextAlignmentCenter];
    
    [_emptyBackgroundView addSubview:emptyImageView];
    [_emptyBackgroundView addSubview:emptyLabel];
    [_emptyBackgroundView addSubview:inviteContactButton];
    
}


-(void) showLoadingBackgroundView:(BOOL)show {
    if(show) {
        _addGroup =  self.navigationItem.rightBarButtonItem!=nil ? _addGroup : self.navigationItem.rightBarButtonItem;
        self.navigationItem.rightBarButtonItem = nil;
        self.searchController.searchBar.hidden = YES;
        self.tableView.backgroundView =  _loadingBackgroundView;
        self.refreshControl = nil;
        self.tableView.backgroundView.opaque = YES;
    }
    else {
        [self initializeRefreshControl];
        self.navigationItem.rightBarButtonItem =  self.navigationItem.rightBarButtonItem!=nil ? self.navigationItem.rightBarButtonItem : _addGroup;
        self.searchController.searchBar.hidden = NO;
        self.tableView.backgroundView = nil;
    }
}


-(void) showEmptyBackgroundView:(BOOL)show {
    
    if(show) {
        self.refreshControl = nil;
        _addGroup =  self.navigationItem.rightBarButtonItem!=nil ? _addGroup : self.navigationItem.rightBarButtonItem;
        self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed:@"btnRefresh--white"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] style:UIBarButtonItemStylePlain target:self action:@selector(refreshContacts)];
        self.navigationItem.rightBarButtonItem.imageInsets = UIEdgeInsetsMake(8,8,8,8);
        
        
        self.searchController.searchBar.hidden = YES;
        self.tableView.backgroundView = _emptyBackgroundView;
        self.tableView.backgroundView.opaque = YES;
    }
    else {
        [self initializeRefreshControl];
        self.refreshControl.enabled = YES;
        self.navigationItem.rightBarButtonItem =  self.navigationItem.rightBarButtonItem!=nil ? self.navigationItem.rightBarButtonItem : _addGroup;
        self.searchController.searchBar.hidden = NO;
        self.tableView.backgroundView = nil;
    }
}

#pragma mark - Initializers

-(void)initializeSearch
{
    self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
    
    self.searchController.searchResultsUpdater = self;
    
    self.searchController.dimsBackgroundDuringPresentation = NO;
    
    self.searchController.hidesNavigationBarDuringPresentation = NO;
    
    self.searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);
    
    self.tableView.tableHeaderView = self.searchController.searchBar;
    
    
    self.searchController.searchBar.searchBarStyle = UISearchBarStyleMinimal;
    self.searchController.searchBar.delegate = self;
    self.searchController.searchBar.placeholder = NSLocalizedString(@"SEARCH_BYNAMEORNUMBER_PLACEHOLDER_TEXT", @"");
    
    sendTextButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [sendTextButton setBackgroundColor:[UIColor ows_materialBlueColor]];
    [sendTextButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    sendTextButton.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y + 44.0, self.searchController.searchBar.frame.size.width, 44.0);
    [self.view addSubview:sendTextButton];
    sendTextButton.hidden = YES;
    
    [sendTextButton addTarget:self action:@selector(sendText) forControlEvents:UIControlEventTouchUpInside];
    [self initializeObservers];
    [self initializeRefreshControl];
    
}

-(void)initializeObservers
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(contactsDidRefresh) name:NOTIFICATION_DIRECTORY_WAS_UPDATED object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(contactRefreshFailed) name:NOTIFICATION_DIRECTORY_FAILED object:nil];
}

-(void)initializeRefreshControl {
    UIRefreshControl *refreshControl = [[UIRefreshControl alloc]init];
    [refreshControl addTarget:self action:@selector(refreshContacts) forControlEvents:UIControlEventValueChanged];
    self.refreshControl = refreshControl;
    [self.tableView addSubview:self.refreshControl];
    
}

#pragma mark - UISearchResultsUpdating

-(void)updateSearchResultsForSearchController:(UISearchController *)searchController {
    
    NSString *searchString = [self.searchController.searchBar text];
    
    [self filterContentForSearchText:searchString scope:nil];
    
    [self.tableView reloadData];
}


#pragma mark - UISearchBarDelegate

- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope {
    [self updateSearchResultsForSearchController:self.searchController];
    
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
    sendTextButton.hidden = YES;
}


#pragma mark - Filter

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    // search by contact name or number
    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"(fullName contains[c] %@) OR (allPhoneNumbers contains[c] %@)", searchText, searchText];
    searchResults = [contacts filteredArrayUsingPredicate:resultPredicate];
    if (!searchResults.count && _searchController.searchBar.text.length == 0) {
        searchResults = contacts;
    }
    NSString *formattedNumber = [PhoneNumber tryParsePhoneNumberFromUserSpecifiedText:searchText].toE164;
    
    // text to a non-signal number if we have no results and a valid phone #
    if (searchResults.count == 0 && searchText.length > 8 && formattedNumber) {
        NSString *sendTextTo = NSLocalizedString(@"SEND_SMS_BUTTON", @"");
        sendTextTo = [sendTextTo stringByAppendingString:formattedNumber];
        [sendTextButton setTitle:sendTextTo forState:UIControlStateNormal];
        sendTextButton.hidden = NO;
        currentSearchTerm = formattedNumber;
    } else {
        sendTextButton.hidden = YES;
    }
    
}


#pragma mark - Send Normal Text to Unknown Contact

- (void)sendText {
    NSString *confirmMessage = NSLocalizedString(@"SEND_SMS_CONFIRM_TITLE", @"");
    if([currentSearchTerm length]>0) {
        confirmMessage =  NSLocalizedString(@"SEND_SMS_INVITE_TITLE", @"");
        confirmMessage = [confirmMessage stringByAppendingString:currentSearchTerm];
        confirmMessage = [confirmMessage stringByAppendingString:NSLocalizedString(@"QUESTIONMARK_PUNCTUATION", @"")];
    }
    
    UIAlertController *alertController = [UIAlertController
                                          alertControllerWithTitle:NSLocalizedString(@"CONFIRMATION_TITLE", @"")
                                          message:confirmMessage
                                          preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *cancelAction = [UIAlertAction
                                   actionWithTitle:NSLocalizedString(@"Cancel", @"")
                                   style:UIAlertActionStyleCancel
                                   handler:^(UIAlertAction *action)
                                   {
                                       DDLogDebug(@"Cancel action");
                                   }];
    
    UIAlertAction *okAction = [UIAlertAction
                               actionWithTitle:NSLocalizedString(@"OK", @"")
                               style:UIAlertActionStyleDefault
                               handler:^(UIAlertAction *action) {
                                   [self.searchController setActive:NO];
                                   
                                   UIDevice *device = [UIDevice currentDevice];
                                   if ([[device model] isEqualToString:@"iPhone"]) {
                                       MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init];
                                       picker.messageComposeDelegate = self;
                                       
                                       picker.recipients = [currentSearchTerm length]> 0 ? [NSArray arrayWithObject:currentSearchTerm] : nil;
                                       picker.body = [NSLocalizedString(@"SMS_INVITE_BODY", @"") stringByAppendingString:@" https://itunes.apple.com/us/app/signal-private-messenger/id874139669?mt=8"];
                                       [self presentViewController:picker animated:YES completion:[UIUtil modalCompletionBlock]];
                                   } else {
                                       // TODO: better backup for iPods (just don't support on)
                                       UIAlertView *notPermitted=[[UIAlertView alloc] initWithTitle:@"" message:NSLocalizedString(@"UNSUPPORTED_FEATURE_ERROR", @"") delegate:nil cancelButtonTitle:NSLocalizedString(@"OK", @"") otherButtonTitles:nil];
                                       [notPermitted show];
                                   }
                               }];
    
    [alertController addAction:cancelAction];
    [alertController addAction:okAction];
    sendTextButton.hidden = YES;
    self.searchController.searchBar.text = @"";
    
    [self dismissViewControllerAnimated:YES
                             completion:nil];
    
    [self presentViewController:alertController
                       animated:YES
                     completion:[UIUtil modalCompletionBlock]];
}

#pragma mark - SMS Composer Delegate

// called on completion of message screen
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult) result
{
    switch (result) {
        case MessageComposeResultCancelled:
            break;
        case MessageComposeResultFailed: {
            UIAlertView *warningAlert = [[UIAlertView alloc] initWithTitle:@"" message:NSLocalizedString(@"SEND_SMS_INVITE_FAILURE", @"") delegate:nil cancelButtonTitle:NSLocalizedString(@"OK", @"") otherButtonTitles:nil];
            [warningAlert show];
            break;
        }
        case MessageComposeResultSent: {
            [self dismissViewControllerAnimated:NO completion:^{
                DDLogDebug(@"view controller dismissed");
            }];
            UIAlertView *successAlert = [[UIAlertView alloc] initWithTitle:@"" message:NSLocalizedString(@"SEND_SMS_INVITE_SUCCESS", @"") delegate:nil cancelButtonTitle:NSLocalizedString(@"OK", @"") otherButtonTitles:nil];
            [successAlert show];
            break;
        }
        default:
            break;
    }
    
    [self dismissViewControllerAnimated:YES completion:nil];
}

#pragma mark - Table View Data Source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    
    if (self.searchController.active) {
        return (NSInteger)[searchResults count];
    } else {
        return (NSInteger)[contacts count];
    }
}


- (ContactTableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    ContactTableViewCell *cell = (ContactTableViewCell*)[tableView dequeueReusableCellWithIdentifier:@"ContactTableViewCell"];
    
    if (cell == nil) {
        cell = [[ContactTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"ContactTableViewCell"];
    }
    
    cell.shouldShowContactButtons = NO;
    
    [cell configureWithContact:[self contactForIndexPath:indexPath]];
    
    tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];
    
    return cell;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 52.0f;
}

#pragma mark - Table View delegate
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    Contact *person = [self contactForIndexPath:indexPath];
    return person.isTextSecureContact ? indexPath : nil;
}


-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *identifier = [[[self contactForIndexPath:indexPath] textSecureIdentifiers] firstObject];
    
    [self dismissViewControllerAnimated:YES completion:^(){
        [Environment messageIdentifier:identifier withCompose:YES];
    }];
}


-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
    ContactTableViewCell * cell = (ContactTableViewCell*)[tableView cellForRowAtIndexPath:indexPath];
    cell.accessoryType = UITableViewCellAccessoryNone;
}

-(Contact*)contactForIndexPath:(NSIndexPath*)indexPath
{
    Contact *contact = nil;
    
    if (self.searchController.active) {
        contact = [searchResults objectAtIndex:(NSUInteger)indexPath.row];
    } else {
        contact = [contacts objectAtIndex:(NSUInteger)indexPath.row];
    }
    
    return contact;
}

#pragma mark Refresh controls

- (void)contactRefreshFailed {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:TIMEOUT message:TIMEOUT_CONTACTS_DETAIL delegate:nil cancelButtonTitle:NSLocalizedString(@"OK", @"") otherButtonTitles:nil];
    [alert show];
    [self updateAfterRefreshTry];
}

- (void)contactsDidRefresh {
    contacts = [[Environment getCurrent] contactsManager].signalContacts;
    [self updateSearchResultsForSearchController:self.searchController];
    [self.tableView reloadData];
    [self updateAfterRefreshTry];
}

- (void) updateAfterRefreshTry {
    [self.refreshControl endRefreshing];
    
    [self showLoadingBackgroundView:NO];
    if([contacts count]==0) {
        [self showEmptyBackgroundView:YES];
    }
    else {
        [self showEmptyBackgroundView:NO];
    }
}

- (void)refreshContacts {
    Environment *env = [Environment getCurrent];
    PhoneNumberDirectoryFilterManager *manager = [env phoneDirectoryManager];
    [manager forceUpdate];
    if([contacts count]==0) {
        [self showLoadingBackgroundView:YES];
    }
}

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    self.searchController.active = NO;
}

- (IBAction)closeAction:(id)sender
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (CGFloat)contentWidth {
    return [UIScreen mainScreen].bounds.size.width - 2*[self marginSize];
}

- (CGFloat)marginSize {
    return 20;
}

@end