/******************************************************************************/
#include "stdafx.h"
#include "../Platforms/iOS/iOS.h"
namespace EE{
/******************************************************************************/
Facebook FB;
#if IOS
enum GET_FLAG
{
   GET_ME     =1<<0,
   GET_FRIENDS=1<<1,
};
static Byte Get;
static void GetMe()
{
#if 0 // this doesn't support email
   [FBSDKProfile loadCurrentProfileWithCompletion:^(FBSDKProfile *profile, NSError *error)
   {
      if(profile)
      {
         FB._me.id  =[profile.userID longLongValue];
         FB._me.name= profile.name;
      }
   }];
#else
   if(FBSDKGraphRequest *graph_req=[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields":@"id,name,email"}])
   {
      [graph_req startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error)
      {
         if(NSDictionary *dict=result)
         {
            // this is called on the main thread, so no need for 'SyncLock'
            if(NSString *s=[dict objectForKey:@"id"   ])FB._me.id   =[s longLongValue];
            if(NSString *s=[dict objectForKey:@"name" ])FB._me.name =s;
            if(NSString *s=[dict objectForKey:@"email"])FB._me.email=s;
         }
      }];
      [graph_req release];
   }
#endif
}
static void GetFriends()
{
   if(FBSDKGraphRequest *graph_req=[[FBSDKGraphRequest alloc] initWithGraphPath:@"me/friends" parameters:@{@"fields":@"id,name"} HTTPMethod:@"GET"])
   {
      [graph_req startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error)
      {
         if(NSArray *friends=[result objectForKey:@"data"])
         {
            // this is called on the main thread, so no need for 'SyncLock'
            FB._friends.setNum([friends count]); REPA(FB._friends) // go from the end as we may remove users below
            {
               if(NSDictionary *dict=[friends objectAtIndex:i])
               {
                  Facebook::User &user=FB._friends[i];
                  if(NSString *s=[dict objectForKey:@"id"  ])user.id  =[s longLongValue];else user.id=0;
                  if(NSString *s=[dict objectForKey:@"name"])user.name= s               ;else user.name.clear();
               }else FB._friends.remove(i, true);
            }
         }
      }];
      [graph_req release];
   }
}
static void FBUpdate()
{
   if(FB.loggedIn())
   {
      if(Get&GET_ME     ){FlagDisable(Get, GET_ME     ); GetMe     ();}
      if(Get&GET_FRIENDS){FlagDisable(Get, GET_FRIENDS); GetFriends();}
   }
}
#endif
/******************************************************************************/
Facebook::Facebook()
{
#if 0 // there's only one 'Facebook' global 'FB' and it doesn't need clearing members to zero
  _me.clear();
#endif
}
Bool Facebook::loggedIn()C
{
#if ANDROID
   JNI jni;
   if(jni && ActivityClass)
   if(JMethodID facebookLoggedIn=jni->GetStaticMethodID(ActivityClass, "facebookLoggedIn", "()Z"))
      return jni->CallStaticBooleanMethod(ActivityClass, facebookLoggedIn);
#elif IOS
   return [FBSDKAccessToken currentAccessToken]!=null;
#endif
   return false;
}
Facebook& Facebook::logIn()
{
#if ANDROID
   JNI jni;
   if(jni && ActivityClass && Activity)
   if(JMethodID facebookLogIn=jni->GetMethodID(ActivityClass, "facebookLogIn", "()V"))
      jni->CallVoidMethod(Activity, facebookLogIn);
#elif IOS
   if(FBSDKLoginManager *login=[[FBSDKLoginManager alloc] init])
   {
      [login logInWithReadPermissions: @[@"public_profile", @"email", @"user_friends"] fromViewController:ViewController handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)
      {
         if(error)
         {
            // error
         }else
         if(result && result.isCancelled)
         {
            // cancelled
         }else
         {
            // logged in
            FBUpdate();
         }
     }];
     [login release];
   }
#endif
   return T;
}
Facebook& Facebook::logOut()
{
#if ANDROID
   JNI jni;
   if(jni && ActivityClass)
   if(JMethodID facebookLogOut=jni->GetStaticMethodID(ActivityClass, "facebookLogOut", "()V"))
      jni->CallStaticVoidMethod(ActivityClass, facebookLogOut);
#elif IOS
   #if 0
      if(FBSDKLoginManager *login=[[FBSDKLoginManager alloc] init])
      {
         [login logOut ];
         [login release];
      }
   #else
      [FBSDKAccessToken setCurrentAccessToken:nil];
      [FBSDKProfile     setCurrentProfile    :nil];
   #endif
#endif
  _me     .clear();
  _friends.clear();
   return T;
}
Facebook& Facebook::getMe()
{
#if ANDROID
   JNI jni;
   if(jni && ActivityClass && Activity)
   if(JMethodID facebookGetMe=jni->GetMethodID(ActivityClass, "facebookGetMe", "()V"))
      jni->CallVoidMethod(Activity, facebookGetMe);
#elif IOS
   if(loggedIn())GetMe();else{FlagEnable(Get, GET_ME); logIn();}
#endif
   return T;
}
Facebook& Facebook::getFriends()
{
#if ANDROID
   JNI jni;
   if(jni && ActivityClass && Activity)
   if(JMethodID facebookGetFriends=jni->GetMethodID(ActivityClass, "facebookGetFriends", "()V"))
      jni->CallVoidMethod(Activity, facebookGetFriends);
#elif IOS
   if(loggedIn())GetFriends();else{FlagEnable(Get, GET_FRIENDS); logIn();}
#endif
   return T;
}
Str Facebook::userImageURL(ULong user_id, Int width, Int height)C
{
   Str  url=S+"http://graph.facebook.com/"+user_id+"/picture";
   Char par='?';
   if(width >0){url+=par; par='&'; url+= "width="; url+=width ;}
   if(height>0){url+=par; par='&'; url+="height="; url+=height;}
   return url;
}
void Facebook::openPage(C Str &page_name, C Str &page_id)
{
#if ANDROID
   if(!page_id.is() || !Explore(S+"fb://page/"+page_id))
#elif IOS
   if(!page_id.is() || !Explore(S+"fb://profile/"+page_id))
#endif
      if(page_name.is())Explore(S+"https://www.facebook.com/"+page_name);else
      if(page_id  .is())Explore(S+"https://www.facebook.com/profile.php?id="+page_id);
}
void Facebook::post(C Str &message, C Str &url, C Str &image_url, C Str &title, C Str &desc, C Str &caption)
{
#if ANDROID
   JNI jni;
   if(jni && ActivityClass && Activity)
   if(JMethodID facebookPost=jni->GetMethodID(ActivityClass, "facebookPost", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V"))
   if(JString   j_message  =JString(jni, message  ))
   if(JString   j_url      =JString(jni, url      ))
   if(JString   j_image_url=JString(jni, image_url))
   if(JString   j_title    =JString(jni, title    ))
   if(JString   j_desc     =JString(jni, desc     ))
   if(JString   j_caption  =JString(jni, caption  ))
      jni->CallVoidMethod(Activity, facebookPost, j_message(), j_url(), j_image_url(), j_title(), j_desc(), j_caption());
#elif IOS
   if(FBSDKShareLinkContent *content=[[FBSDKShareLinkContent alloc] init])
   {
      NSURLAuto ns_url=url; content.contentURL=ns_url; // !! keep 'ns_url' as temp to be deleted later, in case 'content.contentURL' is a weak reference reusing its or NSString's memory
                            content.quote     =NSStringAuto(title.is() ? title : desc.is() ? desc : caption);
      if(FBSDKShareDialog *dialog=[[FBSDKShareDialog alloc] init])
      {
         dialog.fromViewController=ViewController;
         dialog.shareContent=content;
         dialog.delegate=GetAppDelegate();
         [dialog show];
         [dialog release];
      }
      [content release]; // release 'content' after 'dialog' finished, in case it has a weak reference
   }
#endif
}
/******************************************************************************/
} // namespace EE
/******************************************************************************/
#if ANDROID
static      Facebook::UserEmail Me;
static Mems<Facebook::User >    Friends;
static Byte                     Result;
static SyncLock                 Lock;
static void UpdateMe     () {SyncLocker locker(Lock); Swap(FB._me     , Me     );}
static void UpdateFriends() {SyncLocker locker(Lock); Swap(FB._friends, Friends);}
static void CallCallback () {if(void (*callback)(Facebook::RESULT result)=FB.callback)callback(Facebook::RESULT(Result));}
extern "C" JNIEXPORT void JNICALL Java_com_esenthel_Native_facebookMe(JNIEnv *env, jclass clazz, jstring id, jstring name, jstring email)
{
   JNI jni(env);
   SyncLocker locker(Lock);
   Me.id   =TextULong(jni(id   ));
   Me.name =          jni(name ) ;
   Me.email=          jni(email) ;
   App._callbacks.include(UpdateMe);
}
extern "C" JNIEXPORT void JNICALL Java_com_esenthel_Native_facebookFriends(JNIEnv *env, jclass clazz, jobject ids, jobject names)
{
   JNI jni(env);
   Mems<Facebook::User> friends;
   if(JClass ArrayList=JClass(jni, ids))
   if(JMethodID size=jni->GetMethodID(ArrayList, "size", "()I"))
   if(JMethodID get =jni->GetMethodID(ArrayList, "get" , "(I)Ljava/lang/Object;"))
   {
      Int ids_elms=jni->CallIntMethod(ids  , size),
        names_elms=jni->CallIntMethod(names, size);
      if( ids_elms==names_elms)
      {
         friends.setNum(ids_elms);
         REPA(friends)
            if(JString id  =JString(jni, jni->CallObjectMethod(ids  , get, jint(i))))
            if(JString name=JString(jni, jni->CallObjectMethod(names, get, jint(i))))
         {  
            Facebook::User &f=friends[i];
            f.id  =TextULong(id  .str());
            f.name=          name.str() ;
         }
      }
   }
   {
      SyncLocker locker(Lock);
      Swap(Friends, friends);
      App._callbacks.include(UpdateFriends);
   }
}
extern "C" JNIEXPORT void JNICALL Java_com_esenthel_Native_facebookPost(JNIEnv *env, jclass clazz, jint result)
{
   if(FB.callback)
   {
      Result=result;
      App._callbacks.include(CallCallback);
   }
}
#endif
/******************************************************************************/