//
//  JivoSDK.m
//  JivoSupport
//
//  Created by Dimmetrius on 15.03.16.
//  Copyright © 2016 JivoSite. All rights reserved.
//

#include <objc/runtime.h>

#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

#import "JivoSdk.h"
#import <Foundation/Foundation.h>

@interface JivoSdk ()
{
  UIView* loadingView;
}
@end

@implementation JivoSdk

@synthesize delegate;

/* hackishFixClassName для открытия стандартной клавиатуры*/
static const char * const hackishFixClassName = "UIWebBrowserViewMinusAccessoryView";
static Class hackishFixClass = Nil;

- (UIView *)hackishlyFoundBrowserView {
  UIScrollView *scrollView = _webView.scrollView;
  
  UIView *browserView = nil;
  for (UIView *subview in scrollView.subviews) {
    if ([NSStringFromClass([subview class]) hasPrefix:@"UIWebBrowserView"]) {
      browserView = subview;
      break;
    }
  }
  return browserView;
}

- (id)methodReturningNil {
  return nil;
}

- (void)ensureHackishSubclassExistsOfBrowserViewClass:(Class)browserViewClass {
  if (!hackishFixClass) {
    Class newClass = objc_allocateClassPair(browserViewClass, hackishFixClassName, 0);
    IMP nilImp = [self methodForSelector:@selector(methodReturningNil)];
    class_addMethod(newClass, @selector(inputAccessoryView), nilImp, "@@:");
    objc_registerClassPair(newClass);
    
    hackishFixClass = newClass;
  }
}

- (BOOL) hackishlyHidesInputAccessoryView {
  UIView *browserView = [self hackishlyFoundBrowserView];
  return [browserView class] == hackishFixClass;
}

- (void) setHackishlyHidesInputAccessoryView:(BOOL)value {
  UIView *browserView = [self hackishlyFoundBrowserView];
  if (browserView == nil) {
    return;
  }
  [self ensureHackishSubclassExistsOfBrowserViewClass:[browserView class]];
  
  if (value) {
    object_setClass(browserView, hackishFixClass);
  }
  else {
    Class normalClass = objc_getClass("UIWebBrowserView");
    object_setClass(browserView, normalClass);
  }
  [browserView reloadInputViews];
}

- (void)removeBar {
  // убираем toolbar на клаве
  if (![self hackishlyHidesInputAccessoryView]){
    [self setHackishlyHidesInputAccessoryView: YES];
  }
  
}

- (void)keyboardWillShow:(NSNotification *)notification {
  NSLog(@"keyboardWillShow");
  //перед показом клавиатуры делаем ее стандартной
  [self performSelector:@selector(removeBar) withObject:nil afterDelay:0];
  
  //вычисляем высоту клавиатуры и передаем в виджет
  CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
  keyboardFrame = [_webView convertRect:keyboardFrame fromView:nil];
  
  NSString *script = [NSString stringWithFormat:@"window.onKeyBoard({visible:true, height:%@}); ", [@(keyboardFrame.size.height) stringValue]];
  [_webView stringByEvaluatingJavaScriptFromString:script];
  
}

- (void)keyboardDidShow:(NSNotification *)notification {
  NSLog(@"keyboardDidShow");
  
  //вычисляем высоту клавиатуры и передаем в виджет
  CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
  keyboardFrame = [_webView convertRect:keyboardFrame fromView:nil];
  
  [self execJs:[NSString stringWithFormat:@"window.scrollTo(0, %@);", [@(keyboardFrame.size.height) stringValue]]];
  
  
}

- (void)keyboardWillHide:(NSNotification *)notification {
  NSLog(@"keyboardWillHide");
  
  // анимация для скрытия клавиатуры
  CGRect frame = _webView.frame;
  frame.origin.y = 0;
  
  [UIView animateWithDuration:0.3 animations:^{
    _webView.frame = frame;
  }];
  
  [_webView stringByEvaluatingJavaScriptFromString:@"window.onKeyBoard({visible:false, height:0});"];
}

- (void)keyboardDidHide:(NSNotification *)notification {
  NSLog(@"keyboardDidHide");
}


/* Создание спиннера пока загружается webview*/
- (void)createLoader {
  loadingView = [[UIView alloc]initWithFrame:CGRectMake(100, 400, 80, 80)];
  loadingView.backgroundColor = [UIColor colorWithWhite:0. alpha:0.6];
  loadingView.layer.cornerRadius = 5;
  
  UIActivityIndicatorView *activityView=[[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
  activityView.center = CGPointMake(loadingView.frame.size.width / 2.0, 35);
  [activityView startAnimating];
  activityView.tag = 100;
  [loadingView addSubview:activityView];
  
  
  UILabel* lblLoading = [[UILabel alloc]initWithFrame:CGRectMake(0, 48, 80, 30)];
  lblLoading.text = [[NSBundle mainBundle] localizedStringForKey:(@"Loading") value:@"" table:nil];
  lblLoading.textColor = [UIColor whiteColor];
  lblLoading.font = [UIFont fontWithName:lblLoading.font.fontName size:15];
  lblLoading.textAlignment = NSTextAlignmentCenter;
  [loadingView addSubview:lblLoading];
  
  
  [_webView addSubview:loadingView];
  [loadingView setCenter : UIApplication.sharedApplication.keyWindow.center];
  
  
  
}

- (void)deregisterForKeyboardNotifications {
  NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
  [center removeObserver:self name:UIKeyboardWillShowNotification object:nil];
  [center removeObserver:self name:UIKeyboardDidShowNotification  object:nil];
  [center removeObserver:self name:UIKeyboardWillHideNotification object:nil];
  [center removeObserver:self name:UIKeyboardDidHideNotification  object:nil];
}

-(void)dealloc{
  [self deregisterForKeyboardNotifications];
}


- (NSString *)decodeString:(NSString *)encodedString {
  NSString *decodedString = [encodedString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
  
  return decodedString;
}

#pragma mark - UIWebViewDelegate

- (void)webViewDidStartLoad:(UIWebView *)webView {
  //onDidStartLoad
  //спиннер видим
  [loadingView setHidden:NO];
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
  //спиннер не видим
  [loadingView setHidden:YES];
  //for ios 7.1
  [self removeBar];
}

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
  NSURL *url = request.URL;
  //если загрузка по протоколу jivoapi://, то начинаем обработку
  if ([[[url scheme] lowercaseString] isEqualToString:@"jivoapi"]) {
    
    NSArray *components = [[[url absoluteString] stringByReplacingOccurrencesOfString:@"jivoapi://"
                                                                           withString:@""] componentsSeparatedByString:@"/"];
    NSString *apiKey = (NSString*)[components objectAtIndex:0];
    NSString *data = @"";
    if ([components count] > 1){
      data = [self decodeString: (NSString*)[components objectAtIndex:1]];
    }
    
    [delegate onEvent:apiKey :data];
    
    return YES;
  }
  return YES;
}

#pragma mark - JivoSdk

-(id) initWith:(UIWebView*)web;{
  self = [super init];
  if(self) {
    
    self.webView = web;
    self.language = @"";
    
  }
  return self;
}

- (id) initWith:(UIWebView*)web :(NSString*) lang; {
  
  self = [super init];
  if(self) {
    
    self.webView = web;
    self.language = lang;
    
  }
  return self;
}

- (void) prepare; {
  //подписываемся на уведомления клавиатуы
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(keyboardWillShow:)
                                               name:UIKeyboardWillShowNotification
                                             object:nil];
  
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(keyboardWillHide:)
                                               name:UIKeyboardWillHideNotification
                                             object:nil];
  
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(keyboardDidHide:)
                                               name:UIKeyboardDidHideNotification
                                             object:nil];
  
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(keyboardDidShow:)
                                               name:UIKeyboardDidShowNotification
                                             object:nil];
  
  //назначенее делегата
  _webView.delegate = self;
}

-(void) start;{
  
  //спиннер
  [self createLoader];
  
  //убираем нативный скролл
  _webView.scrollView.scrollEnabled = NO;
  _webView.scrollView.bounces = NO;
  
  //настройка скрытия клавиатуры
  _webView.scrollView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;
  
  NSString *indexFile;
  
  if(self.language.length > 0){
    indexFile = [NSString stringWithFormat:@"index_%@", self.language];
  }else{
    indexFile = @"index";
  }
  
  //загрузка кода виджета в webview
  NSString *htmlFile = [[NSBundle mainBundle] pathForResource:indexFile ofType:@"html" inDirectory:@"/html"];
  NSString* htmlString = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:nil];
  
  [_webView loadHTMLString:htmlString
                   baseURL:[NSURL fileURLWithPath:
                            [NSString stringWithFormat:@"%@/html/",
                             [[NSBundle mainBundle] bundlePath]]]];
  
  
}

-(void) stop; {
  
  [self deregisterForKeyboardNotifications];
}

-(NSString*) execJs : (NSString*) code;{
  return [_webView stringByEvaluatingJavaScriptFromString:code];
}

-(void) callApiMethod: (NSString*) methodName : (NSString*)data;{
  [_webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"window.jivo_api.%@(%@);",methodName,data]];
}

@end