#ifndef DisplaySpec_H
#define DisplaySpec_H

#include <set>

#include "RageTypes.h"

struct DisplayMode {
	// Width (in pixels) of the display in this mode
	unsigned int width;
	// Height (in pixels) of the display in this mode
	unsigned int height;
	/** Refresh rate, in hz, of the display for the given mode
	 * MacOS Quartz Display Services provides rate as double,
	 * winapi DEVMODE uses 32bit unsigned int (still gives rate as hz),
	 * RandR gives 32 bit pixel clock, which is then divided by width*height.
	 */
	double refreshRate;
	/*
	 * Bits-per-pixel is *not* a property of the DisplayMode for our purposes:
	 * bit-depth is going to be a property of the OpenGL/D3D context, not a display
	 * configuration
	 */

	bool operator<( const DisplayMode &other ) const
	{
/** @brief A quick way to compare the two DisplayResolutions. */
#define COMPARE(x) if( x != other.x ) return x < other.x;
		COMPARE( width );
		COMPARE( height );
		COMPARE( refreshRate );
#undef COMPARE
		return false;
	}

	// Lua
	void PushSelf( lua_State *L );
};

/** @brief The dimensions of the program. */
class DisplaySpec
{
public:
	/*
	 * Construct a specification for the display with the given ID, which supports the given modes,
	 * and is currently using the specified mode with the specified logical screen bounds
	 */
	DisplaySpec(const std::string &id,
				const std::string &name,
				const std::set<DisplayMode> &modes,
				const DisplayMode &curMode,
				const RectI &curBounds,
	            const bool isVirtual=false):
			m_sId( id ), m_sName( name ),
			m_sModes( modes ), m_bCurModeActive( true ), m_CurMode( curMode ),
			m_rectBounds( curBounds ), m_bIsVirtual( isVirtual )
	{
		if ( m_sModes.find( curMode ) == m_sModes.end() )
		{
			// This is an error, make a failing assertion with a descriptive error message
			std::stringstream msgStream;
			msgStream << "DisplaySpec current mode (" << curMode.width << "x" <<
				curMode.height << "@" << curMode.refreshRate << ") not in given list of supported modes: ";
			for ( auto &m : modes )
			{
				msgStream << m.width << "x" << m.height << "@" << m.refreshRate << ", ";
			}
			auto msg = msgStream.str();
			// Drop the trailing ", "
			msg.resize( msg.size() - 2 );

			ASSERT_M( false, msg.c_str() );
		}
	}

	/*
	 * Construct a specification for the display with the given ID, which supports the given modes,
	 * and is currently disabled (has no active mode)
	 */
	DisplaySpec(const std::string id,
				const std::string name,
				const std::set<DisplayMode> modes,
				const bool isVirtual=false):
		m_sId( id ), m_sName( name ),
		m_sModes( modes ), m_bCurModeActive( false ), m_CurMode( { } ),
		m_bIsVirtual( isVirtual )
	{

	}

	// Create a specification for a display supporting a single (and currently active) mode
	DisplaySpec(std::string id, std::string name, DisplayMode mode) : m_sId( id ), m_sName( name ), m_bIsVirtual( false ),
		m_bCurModeActive( true ), m_CurMode( mode )
	{
		m_sModes.insert( mode );
		m_rectBounds = RectI( 0, 0, mode.width, mode.height );
	}

	DisplaySpec( const DisplaySpec &other ) = default;

	std::string name() const
	{
		return m_sName;
	}

	std::string id() const
	{
		return m_sId;
	}

	const std::set<DisplayMode> &supportedModes() const
	{
		return m_sModes;
	}

	/*
	 * Return a pointer to the currently active display mode, or nullptr if
	 * display is inactive
	 *
	 * Note that inactive *does not* necessarily mean unusable. E.g., in X11,
	 * an output can be enabled/disabled by an application by connecting/disconnecting
	 * a crtc
	 */
	const DisplayMode *currentMode() const
	{
		return m_bCurModeActive ? &m_CurMode : nullptr;
	}

	const RectI &currentBounds() const
	{
		return m_rectBounds;
	}

	bool isVirtual() const
	{
		return m_bIsVirtual;
	}

	/**
	 * @brief Determine if one DisplaySpec compares less than the other.
	 *
	 * Used to enforce a consistent ordering of displays, e.g. for consistent option
	 * presentation. Also allows DisplaySpec to be placed in a std::set
	 *
	 * @param other the other DisplaySpec to check.
	 * @return true if this DisplaySpec is less than the other, or false otherwise. */
	bool operator<( const DisplaySpec &other ) const
	{
		return m_sId < other.id();
	}

	// Lua
	void PushSelf( lua_State *L );
private:
	// Unique identifier of the display
	std::string m_sId;
	// "Human-readable" display name
	std::string m_sName;
	// Modes supported by this display
	std::set<DisplayMode> m_sModes;
	// currently configured mode, if available
	bool m_bCurModeActive;
	DisplayMode m_CurMode;
	// The current bounds of this display in global display coordinate space
	RectI m_rectBounds;
	// Flag is "true" when display represents a logical display like an X screen
	// or the Win32 "Virtual screen"
	bool m_bIsVirtual;
};
/** @brief The collection of DisplaySpec available within the program. */
typedef std::set<DisplaySpec> DisplaySpecs;
//Lua
DisplaySpecs *pushDisplaySpecs(lua_State *L, const DisplaySpecs &specs);


#endif

/**
 * @file
 * @author Chris Danford (c) 2001-2005
 * @section LICENSE
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */