// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.

#include "FriendsAndChatPrivatePCH.h"
#include "FriendViewModel.h"

class FFriendViewModelImpl
	: public FFriendViewModel
{
public:

	virtual void EnumerateActions(TArray<EFriendActionType::Type>& Actions)
	{
		if(FriendItem->IsGameRequest())
		{
			if (FriendItem->IsGameJoinable())
			{
				Actions.Add(EFriendActionType::JoinGame);
			}
			Actions.Add(EFriendActionType::RejectGame);
		}
		else if(FriendItem->IsPendingAccepted())
		{
			Actions.Add(EFriendActionType::Updating);
		}
		else
		{
			switch (FriendItem->GetInviteStatus())
			{
				case EInviteStatus::Accepted :
				{
					if (FriendItem->IsGameJoinable())
					{
						Actions.Add(EFriendActionType::JoinGame);
					}
					if (FFriendsAndChatManager::Get()->IsInJoinableGameSession())
					{
						Actions.Add(EFriendActionType::InviteToGame);
					}
					if (FriendItem->IsOnline())
					{
						Actions.Add(EFriendActionType::Chat);
					}
					Actions.Add(EFriendActionType::RemoveFriend);
				}
				break;
				case EInviteStatus::PendingInbound :
				{
					Actions.Add(EFriendActionType::AcceptFriendRequest);
					Actions.Add(EFriendActionType::RejectFriendRequest);
				}
				break;
				case EInviteStatus::PendingOutbound :
				{
					Actions.Add(EFriendActionType::CancelFriendRequest);
				}
				break;
			default:
				Actions.Add(EFriendActionType::SendFriendRequest);
				break;
			}
		}
	}

	virtual void PerformAction(const EFriendActionType::Type ActionType)
	{
		switch(ActionType)
		{
			case EFriendActionType::AcceptFriendRequest : 
			{
				AcceptFriend();
				break;
			}
			case EFriendActionType::RemoveFriend :
			case EFriendActionType::IgnoreFriendRequest :
			case EFriendActionType::BlockFriend :
			case EFriendActionType::RejectFriendRequest:
			case EFriendActionType::CancelFriendRequest:
			{
				RemoveFriend();
				break;
			}
			case EFriendActionType::SendFriendRequest : 
			{
				SendFriendRequest();
				break;
			}
			case EFriendActionType::InviteToGame : 
			{
				InviteToGame();
				break;
			}
			case EFriendActionType::JoinGame : 
			{
				JoinGame();
				break;
			}
			case EFriendActionType::RejectGame:
			{
				RejectGame();
				break;
			}
			case EFriendActionType::Chat:
			{
				StartChat();
				break;
			}
		}
	}

	~FFriendViewModelImpl()
	{
		Uninitialize();
	}

	virtual FText GetFriendName() const override
	{
		return FText::FromString(FriendItem->GetName());
	}

	virtual FText GetFriendLocation() const override
	{
		return FriendItem.IsValid() ? FriendItem->GetFriendLocation() : FText::GetEmpty();
	}

	virtual bool IsOnline() const override
	{
		return FriendItem.IsValid() ? FriendItem->IsOnline() : false;
	}

	virtual EOnlinePresenceState::Type GetOnlineStatus() const override
	{
		return FriendItem.IsValid() ? FriendItem->GetOnlineStatus() : EOnlinePresenceState::Offline;
	}

	virtual FString GetClientId() const override
	{
		return FriendItem.IsValid() ? FriendItem->GetClientId() : FString();
	}

private:

	void RemoveFriend() const
	{
		FFriendsAndChatManager::Get()->DeleteFriend( FriendItem );
	}

	void AcceptFriend() const
	{
		FFriendsAndChatManager::Get()->AcceptFriend( FriendItem );
	}

	void SendFriendRequest() const
	{
		if (FriendItem.IsValid())
		{
			FFriendsAndChatManager::Get()->RequestFriend(FText::FromString(FriendItem->GetName()));
		}
	}

	void InviteToGame()
	{
		if (FriendItem.IsValid() && 
			FriendItem->GetOnlineFriend().IsValid())
		{
			FFriendsAndChatManager::Get()->SendGameInvite(FriendItem);
		}
	}

	void JoinGame()
	{
		if (FriendItem.IsValid() && 
			FriendItem->GetOnlineFriend().IsValid() && 
			(FriendItem->IsGameRequest() || FriendItem->IsGameJoinable()))
		{
			FFriendsAndChatManager::Get()->AcceptGameInvite(FriendItem);
		}
	}

	void RejectGame()
	{
		if (FriendItem.IsValid() &&
			FriendItem->GetOnlineFriend().IsValid() &&
			FriendItem->IsGameRequest())
		{
			FFriendsAndChatManager::Get()->RejectGameInvite(FriendItem);
		}
	}

	void StartChat()
	{
		if ( FriendItem.IsValid() && FriendItem->GetOnlineFriend().IsValid() )
		{
			FFriendsAndChatManager::Get()->GenerateChatWindow(FriendItem);
		}
	}

private:
	void Initialize()
	{
	}

	void Uninitialize()
	{
	}

	FFriendViewModelImpl(
		const TSharedRef<IFriendItem>& FriendItem
		)
		: FriendItem(FriendItem)
	{
	}

private:
	TSharedPtr<IFriendItem> FriendItem;

private:
	friend FFriendViewModelFactory;
};

TSharedRef< FFriendViewModel > FFriendViewModelFactory::Create(
	const TSharedRef<IFriendItem>& FriendItem
	)
{
	TSharedRef< FFriendViewModelImpl > ViewModel(new FFriendViewModelImpl(FriendItem));
	ViewModel->Initialize();
	return ViewModel;
}