#pragma once
#include "ui-dialogs.hh"
#include "ui-mousectrl.hh"
#include "ui-actions.hh"

#include <ebcl/Sets.hh>


/*= WINDOW MANAGEMENT ========================================================*/

struct T_UIApp
{
	T_UIApp( );
	~T_UIApp( );

	//----------------------------------------------------------------------

	void pushDialog( P_ModalDialog dialog ) noexcept
		{ modals_.add( std::move( dialog ) ); }

	void msgbox( char const* title ,
			char const* text ,
			T_MessageBox::F_Handler handler = { } ,
			T_MessageBox::T_Buttons buttons = T_MessageBox::BT_OK )
		{ pushDialog( NewOwned< T_MessageBox >( title , text , handler , buttons ) ); }
	void msgbox( T_String const& title ,
			T_String const& text ,
			T_MessageBox::F_Handler handler = { } ,
			T_MessageBox::T_Buttons buttons = T_MessageBox::BT_OK )
		{ pushDialog( NewOwned< T_MessageBox >( title , text , handler , buttons ) ); }

	//----------------------------------------------------------------------

	void addAction( T_UIAction action ) noexcept;
	void actionMenu( T_String const& id ) const noexcept;
	void actionButton( T_String const& id ) const noexcept;

	//----------------------------------------------------------------------

	ImFont* defaultFont( ) const noexcept
		{ return defaultFont_; }
	ImFont* smallFont( ) const noexcept
		{ return smallFont_; }

	//----------------------------------------------------------------------

	void handleEvents( ) noexcept;

	void setMouseDelegate( A_MouseCtrl* const delegate ) noexcept
		{ mDelegate_ = delegate; }
	void clearMouseDelegate( ) noexcept
		{ mDelegate_ = nullptr; }

	bool exiting( ) const noexcept
		{ return exiting_; }

	//----------------------------------------------------------------------

	void render( ) noexcept;
	void swap( ) const noexcept;

    private:
	// Window and GL context
	SDL_Window* window_;
	SDL_GLContext gl_;

	// Fonts
	ImFont* defaultFont_;
	ImFont* smallFont_;

	// Do we need to quit?
	bool exiting_{ false };

	// Keyboard events / state
	T_KeyboardModifiers kbMods_;
	T_AutoArray< char , 32 > kbKeys_;

	// Mouse capture
	bool mCapture_{ false };
	ImVec2 mInitial_{ 0 , 0 };
	ImVec2 mMove_{ 0 , 0 };
	A_MouseCtrl* mDelegate_;

	// Stack of modal dialogs
	T_AutoArray< P_ModalDialog , 8 > modals_;

	// Actions and keyboard shortcuts
	T_ObjectTable< T_String , T_UIAction > actions_{
		[]( T_UIAction const& a ) -> T_String {
			return a.id;
		} };
	T_KeyValueTable< T_KeyboardShortcut , ebcl::T_Set< T_String > > shortcuts_;

	// Event handling
	void handleMouseCapture( ) noexcept;
	void handleKeyboardShortcuts( ) noexcept;

	// Modals
	void handleDialogs( ) noexcept;
};