#pragma once

#include <limits>
#include <cmath>





/** List of slot numbers, used for inventory-painting */
typedef std::vector<int> cSlotNums;






// tolua_begin

/** Experience Orb setup */
enum
{
	// Open to suggestion on naming convention here :)
	MAX_EXPERIENCE_ORB_SIZE = 2000
} ;





/** Block face constants, used in PlayerDigging and PlayerBlockPlacement packets and bbox collision calc */
enum eBlockFace
{
	BLOCK_FACE_NONE = -1,  // Interacting with no block face - swinging the item in the air
	BLOCK_FACE_XM   =  4,  // Interacting with the X- face of the block
	BLOCK_FACE_XP   =  5,  // Interacting with the X+ face of the block
	BLOCK_FACE_YM   =  0,  // Interacting with the Y- face of the block
	BLOCK_FACE_YP   =  1,  // Interacting with the Y+ face of the block
	BLOCK_FACE_ZM   =  2,  // Interacting with the Z- face of the block
	BLOCK_FACE_ZP   =  3,  // Interacting with the Z+ face of the block

	// Synonyms using the (deprecated) world directions:
	BLOCK_FACE_BOTTOM = BLOCK_FACE_YM,  // Interacting with the bottom   face of the block
	BLOCK_FACE_TOP    = BLOCK_FACE_YP,  // Interacting with the top      face of the block
	BLOCK_FACE_NORTH  = BLOCK_FACE_ZM,  // Interacting with the northern face of the block
	BLOCK_FACE_SOUTH  = BLOCK_FACE_ZP,  // Interacting with the southern face of the block
	BLOCK_FACE_WEST   = BLOCK_FACE_XM,  // Interacting with the western  face of the block
	BLOCK_FACE_EAST   = BLOCK_FACE_XP,  // Interacting with the eastern  face of the block

	// Bounds, used for range-checking:
	BLOCK_FACE_MIN = -1,
	BLOCK_FACE_MAX =  5,
} ;





/** PlayerDigging status constants */
enum
{
	DIG_STATUS_STARTED   = 0,
	DIG_STATUS_CANCELLED = 1,
	DIG_STATUS_FINISHED  = 2,
	DIG_STATUS_DROP_STACK= 3,
	DIG_STATUS_DROP_HELD = 4,
	DIG_STATUS_SHOOT_EAT = 5,
} ;





/** Individual actions sent in the WindowClick packet */
enum eClickAction
{
	// Sorted by occurrence in the 1.5 protocol
	caLeftClick,
	caRightClick,
	caShiftLeftClick,
	caShiftRightClick,
	caNumber1,
	caNumber2,
	caNumber3,
	caNumber4,
	caNumber5,
	caNumber6,
	caNumber7,
	caNumber8,
	caNumber9,
	caMiddleClick,
	caDropKey,
	caCtrlDropKey,
	caLeftClickOutside,
	caRightClickOutside,
	caLeftClickOutsideHoldNothing,
	caRightClickOutsideHoldNothing,
	caLeftPaintBegin,
	caRightPaintBegin,
	caLeftPaintProgress,
	caRightPaintProgress,
	caLeftPaintEnd,
	caRightPaintEnd,
	caDblClick,
	// Add new actions here
	caUnknown = 255,

	// Keep this list in sync with ClickActionToString() function below!
} ;





enum eGameMode
{
	eGameMode_NotSet    = -1,
	eGameMode_Survival  = 0,
	eGameMode_Creative  = 1,
	eGameMode_Adventure = 2,
	eGameMode_Spectator = 3,

	// Easier-to-use synonyms:
	gmNotSet    = eGameMode_NotSet,
	gmSurvival  = eGameMode_Survival,
	gmCreative  = eGameMode_Creative,
	gmAdventure = eGameMode_Adventure,
	gmSpectator = eGameMode_Spectator,

	// These two are used to check GameMode for validity when converting from integers.
	gmMax,  // Gets automatically assigned
	gmMin = 0,
} ;





enum eChatType
{
	ctChatBox        = 0,
	ctSystem         = 1,
	ctAboveActionBar = 2,
} ;





enum eWeather
{
	eWeather_Sunny        = 0,
	eWeather_Rain         = 1,
	eWeather_ThunderStorm = 2,

	// Easier-to-use synonyms:
	wSunny        = eWeather_Sunny,
	wRain         = eWeather_Rain,
	wThunderstorm = eWeather_ThunderStorm,
	wStorm        = wThunderstorm,
} ;





enum eMobHeadType
{
	SKULL_TYPE_SKELETON    = 0,
	SKULL_TYPE_WITHER      = 1,
	SKULL_TYPE_ZOMBIE      = 2,
	SKULL_TYPE_PLAYER      = 3,
	SKULL_TYPE_CREEPER     = 4,
} ;





enum eMobHeadRotation
{
	SKULL_ROTATION_NORTH = 0,
	SKULL_ROTATION_NORTH_NORTH_EAST = 1,
	SKULL_ROTATION_NORTH_EAST = 2,
	SKULL_ROTATION_EAST_NORTH_EAST = 3,
	SKULL_ROTATION_EAST = 4,
	SKULL_ROTATION_EAST_SOUTH_EAST = 5,
	SKULL_ROTATION_SOUTH_EAST = 6,
	SKULL_ROTATION_SOUTH_SOUTH_EAST = 7,
	SKULL_ROTATION_SOUTH = 8,
	SKULL_ROTATION_SOUTH_SOUTH_WEST = 9,
	SKULL_ROTATION_SOUTH_WEST = 10,
	SKULL_ROTATION_WEST_SOUTH_WEST = 11,
	SKULL_ROTATION_WEST = 12,
	SKULL_ROTATION_WEST_NORTH_WEST = 13,
	SKULL_ROTATION_NORTH_WEST = 14,
	SKULL_ROTATION_NORTH_NORTH_WEST = 15,
} ;





inline const char * ClickActionToString(eClickAction a_ClickAction)
{
	switch (a_ClickAction)
	{
		case caLeftClick:                    return "caLeftClick";
		case caRightClick:                   return "caRightClick";
		case caShiftLeftClick:               return "caShiftLeftClick";
		case caShiftRightClick:              return "caShiftRightClick";
		case caNumber1:                      return "caNumber1";
		case caNumber2:                      return "caNumber2";
		case caNumber3:                      return "caNumber3";
		case caNumber4:                      return "caNumber4";
		case caNumber5:                      return "caNumber5";
		case caNumber6:                      return "caNumber6";
		case caNumber7:                      return "caNumber7";
		case caNumber8:                      return "caNumber8";
		case caNumber9:                      return "caNumber9";
		case caMiddleClick:                  return "caMiddleClick";
		case caDropKey:                      return "caDropKey";
		case caCtrlDropKey:                  return "caCtrlDropKey";
		case caLeftClickOutside:             return "caLeftClickOutside";
		case caRightClickOutside:            return "caRightClickOutside";
		case caLeftClickOutsideHoldNothing:  return "caLeftClickOutsideHoldNothing";
		case caRightClickOutsideHoldNothing: return "caRightClickOutsideHoldNothing";
		case caLeftPaintBegin:               return "caLeftPaintBegin";
		case caRightPaintBegin:              return "caRightPaintBegin";
		case caLeftPaintProgress:            return "caLeftPaintProgress";
		case caRightPaintProgress:           return "caRightPaintProgress";
		case caLeftPaintEnd:                 return "caLeftPaintEnd";
		case caRightPaintEnd:                return "caRightPaintEnd";
		case caDblClick:                     return "caDblClick";

		case caUnknown:                      return "caUnknown";
	}
	ASSERT(!"Unknown click action");
	return "caUnknown";
}





/** Returns a blockface mirrored around the Y axis (doesn't change up / down). */
inline eBlockFace MirrorBlockFaceY(eBlockFace a_BlockFace)
{
	switch (a_BlockFace)
	{
		case BLOCK_FACE_XM: return BLOCK_FACE_XP;
		case BLOCK_FACE_XP: return BLOCK_FACE_XM;
		case BLOCK_FACE_ZM: return BLOCK_FACE_ZP;
		case BLOCK_FACE_ZP: return BLOCK_FACE_ZM;
		case BLOCK_FACE_NONE:
		case BLOCK_FACE_YM:
		case BLOCK_FACE_YP:
		{
			return a_BlockFace;
		};
	}
	#if !defined(__clang__)
		ASSERT(!"Unknown BLOCK_FACE");
		return a_BlockFace;
	#endif
}





/** Returns a blockface rotated around the Y axis counter-clockwise. */
inline eBlockFace RotateBlockFaceCCW(eBlockFace a_BlockFace)
{
	switch (a_BlockFace)
	{
		case BLOCK_FACE_XM: return BLOCK_FACE_ZP;
		case BLOCK_FACE_XP: return BLOCK_FACE_ZM;
		case BLOCK_FACE_ZM: return BLOCK_FACE_XM;
		case BLOCK_FACE_ZP: return BLOCK_FACE_XP;
		case BLOCK_FACE_NONE:
		case BLOCK_FACE_YM:
		case BLOCK_FACE_YP:
		{
			return a_BlockFace;
		}
	}
	#if !defined(__clang__)
		ASSERT(!"Unknown BLOCK_FACE");
		return a_BlockFace;
	#endif
}





inline eBlockFace RotateBlockFaceCW(eBlockFace a_BlockFace)
{
	switch (a_BlockFace)
	{
		case BLOCK_FACE_XM: return BLOCK_FACE_ZM;
		case BLOCK_FACE_XP: return BLOCK_FACE_ZP;
		case BLOCK_FACE_ZM: return BLOCK_FACE_XP;
		case BLOCK_FACE_ZP: return BLOCK_FACE_XM;
		case BLOCK_FACE_NONE:
		case BLOCK_FACE_YM:
		case BLOCK_FACE_YP:
		{
			return a_BlockFace;
		};
	}
	#if !defined(__clang__)
		ASSERT(!"Unknown BLOCK_FACE");
		return a_BlockFace;
	#endif
}





inline eBlockFace ReverseBlockFace(eBlockFace  a_BlockFace)
{
	switch (a_BlockFace)
	{
		case BLOCK_FACE_YP:   return BLOCK_FACE_YM;
		case BLOCK_FACE_XP:   return BLOCK_FACE_XM;
		case BLOCK_FACE_ZP:   return BLOCK_FACE_ZM;
		case BLOCK_FACE_YM:   return BLOCK_FACE_YP;
		case BLOCK_FACE_XM:   return BLOCK_FACE_XP;
		case BLOCK_FACE_ZM:   return BLOCK_FACE_ZP;
		case BLOCK_FACE_NONE: return a_BlockFace;
	}
	#if !defined(__clang__)
		ASSERT(!"Unknown BLOCK_FACE");
		return a_BlockFace;
	#endif
}





/** Returns the textual representation of the BlockFace constant. */
inline AString BlockFaceToString(eBlockFace a_BlockFace)
{
	switch (a_BlockFace)
	{
		case BLOCK_FACE_XM: return "BLOCK_FACE_XM";
		case BLOCK_FACE_XP: return "BLOCK_FACE_XP";
		case BLOCK_FACE_YM: return "BLOCK_FACE_YM";
		case BLOCK_FACE_YP: return "BLOCK_FACE_YP";
		case BLOCK_FACE_ZM: return "BLOCK_FACE_ZM";
		case BLOCK_FACE_ZP: return "BLOCK_FACE_ZP";
		case BLOCK_FACE_NONE: return "BLOCK_FACE_NONE";
	}
	// clang optimisises this line away then warns that it has done so.
	#if !defined(__clang__)
		return Printf("Unknown BLOCK_FACE: %d", a_BlockFace);
	#endif
}





inline bool IsValidBlock(int a_BlockType)
{
	if (
		(a_BlockType > -1) &&
		(a_BlockType <= E_BLOCK_MAX_TYPE_ID)
	)
	{
		return true;
	}
	return false;
}





inline bool IsValidItem(int a_ItemType)
{
	if (
		((a_ItemType >= E_ITEM_FIRST) && (a_ItemType <= E_ITEM_MAX_CONSECUTIVE_TYPE_ID)) ||  // Basic items range
		((a_ItemType >= E_ITEM_FIRST_DISC) && (a_ItemType <= E_ITEM_LAST_DISC))   // Music discs' special range
	)
	{
		return true;
	}

	if (a_ItemType == 0)
	{
		return false;
	}

	return IsValidBlock(a_ItemType);
}

// tolua_end





inline bool IsBlockWater(BLOCKTYPE a_BlockType)
{
	return ((a_BlockType == E_BLOCK_WATER) || (a_BlockType == E_BLOCK_STATIONARY_WATER));
}





inline bool IsBlockWaterOrIce(BLOCKTYPE a_BlockType)
{
	return (IsBlockWater(a_BlockType) || (a_BlockType == E_BLOCK_ICE));
}





inline bool IsBlockLava(BLOCKTYPE a_BlockType)
{
	return ((a_BlockType == E_BLOCK_LAVA) || (a_BlockType == E_BLOCK_STATIONARY_LAVA));
}





inline bool IsBlockLiquid(BLOCKTYPE a_BlockType)
{
	return IsBlockWater(a_BlockType) || IsBlockLava(a_BlockType);
}




inline bool IsBlockRail(BLOCKTYPE a_BlockType)
{
	switch (a_BlockType)
	{
		case E_BLOCK_RAIL:
		case E_BLOCK_ACTIVATOR_RAIL:
		case E_BLOCK_DETECTOR_RAIL:
		case E_BLOCK_POWERED_RAIL:
		{
			return true;
		}
		default: return false;
	}
}





inline bool IsBlockTypeOfDirt(BLOCKTYPE a_BlockType)
{
	switch (a_BlockType)
	{
		case E_BLOCK_DIRT:
		case E_BLOCK_GRASS:
		case E_BLOCK_FARMLAND:
		{
			return true;
		}
	}
	return false;
}




inline void AddFaceDirection(int & a_BlockX, int & a_BlockY, int & a_BlockZ, eBlockFace a_BlockFace, bool a_bInverse = false)  // tolua_export
{  // tolua_export
	if (!a_bInverse)
	{
		switch (a_BlockFace)
		{
			case BLOCK_FACE_YP: a_BlockY++; break;
			case BLOCK_FACE_YM: a_BlockY--; break;
			case BLOCK_FACE_ZM: a_BlockZ--; break;
			case BLOCK_FACE_ZP: a_BlockZ++; break;
			case BLOCK_FACE_XP: a_BlockX++; break;
			case BLOCK_FACE_XM: a_BlockX--; break;
			case BLOCK_FACE_NONE:
			{
				LOGWARNING("%s: Unknown face: %d", __FUNCTION__, a_BlockFace);
				ASSERT(!"AddFaceDirection(): Unknown face");
				break;
			}
		}
	}
	else
	{
		switch (a_BlockFace)
		{
			case BLOCK_FACE_YP: a_BlockY--; break;
			case BLOCK_FACE_YM: a_BlockY++; break;
			case BLOCK_FACE_ZM: a_BlockZ++; break;
			case BLOCK_FACE_ZP: a_BlockZ--; break;
			case BLOCK_FACE_XP: a_BlockX--; break;
			case BLOCK_FACE_XM: a_BlockX++; break;
			case BLOCK_FACE_NONE:
			{
				LOGWARNING("%s: Unknown inv face: %d", __FUNCTION__, a_BlockFace);
				ASSERT(!"AddFaceDirection(): Unknown face");
				break;
			}
		}
	}
}  // tolua_export





inline void AddFaceDirection(int & a_BlockX, unsigned char & a_BlockY, int & a_BlockZ, eBlockFace a_BlockFace, bool a_bInverse = false)
{
	int Y = a_BlockY;
	AddFaceDirection(a_BlockX, Y, a_BlockZ, a_BlockFace, a_bInverse);
	a_BlockY = Clamp<unsigned char>(static_cast<unsigned char>(Y), 0, 255);
}





inline void EulerToVector(double a_Pan, double a_Pitch, double & a_X, double & a_Y, double & a_Z)
{
	// 	a_X = sinf ( a_Pan / 180 * PI) * cosf ( a_Pitch / 180 * PI);
	// 	a_Y = -sinf ( a_Pitch / 180 * PI);
	// 	a_Z = -cosf ( a_Pan / 180 * PI) * cosf ( a_Pitch / 180 * PI);
	a_X = cos(a_Pan / 180 * M_PI) * cos(a_Pitch / 180 * M_PI);
	a_Y = sin(a_Pan / 180 * M_PI) * cos(a_Pitch / 180 * M_PI);
	a_Z = sin(a_Pitch / 180 * M_PI);
}





inline void VectorToEuler(double a_X, double a_Y, double a_Z, double & a_Pan, double & a_Pitch)
{
	double r = sqrt((a_X * a_X) + (a_Z * a_Z));
	if (r < std::numeric_limits<double>::epsilon())
	{
		a_Pan = 0;
	}
	else
	{
		a_Pan = atan2(a_Z, a_X) * 180 / M_PI - 90;
	}

	a_Pitch = atan2(a_Y, r) * 180 / M_PI;
}





inline float GetSignf(float a_Val)
{
	return (a_Val < 0.f) ? -1.f : 1.f;
}





inline float GetSpecialSignf( float a_Val)
{
	return (a_Val <= 0.f) ? -1.f : 1.f;
}





template <class T> inline T Diff(T a_Val1, T a_Val2)
{
	return std::abs(a_Val1 - a_Val2);
}





// tolua_begin

enum eMessageType
{
	// http://forum.mc-server.org/showthread.php?tid=1212
	// MessageType...

	mtCustom,          // Send raw data without any processing
	mtFailure,         // Something could not be done (i.e. command not executed due to insufficient privilege)
	mtInformation,     // Informational message (i.e. command usage)
	mtSuccess,         // Something executed successfully
	mtWarning,         // Something concerning (i.e. reload) is about to happen
	mtFatal,           // Something catastrophic occured (i.e. plugin crash)
	mtDeath,           // Denotes death of player
	mtPrivateMessage,  // Player to player messaging identifier
	mtJoin,            // A player has joined the server
	mtLeave,           // A player has left the server

	// Common aliases:
	mtFail  = mtFailure,
	mtError = mtFailure,
	mtInfo  = mtInformation,
	mtPM    = mtPrivateMessage,
};





/** Normalizes an angle in degrees to the [-180, +180) range: */
inline double NormalizeAngleDegrees(const double a_Degrees)
{
	double Norm = fmod(a_Degrees + 180, 360);
	if (Norm < 0)
	{
		Norm += 360;
	}
	return Norm - 180;
}





namespace ItemCategory
{
	inline bool IsPickaxe(short a_ItemID)
	{
		return (a_ItemID == E_ITEM_WOODEN_PICKAXE)
			|| (a_ItemID == E_ITEM_STONE_PICKAXE)
			|| (a_ItemID == E_ITEM_IRON_PICKAXE)
			|| (a_ItemID == E_ITEM_GOLD_PICKAXE)
			|| (a_ItemID == E_ITEM_DIAMOND_PICKAXE);
	}



	inline bool IsAxe(short a_ItemID)
	{
		return (a_ItemID == E_ITEM_WOODEN_AXE)
			|| (a_ItemID == E_ITEM_STONE_AXE)
			|| (a_ItemID == E_ITEM_IRON_AXE)
			|| (a_ItemID == E_ITEM_GOLD_AXE)
			|| (a_ItemID == E_ITEM_DIAMOND_AXE);
	}



	inline bool IsSword(short a_ItemID)
	{
		return (a_ItemID == E_ITEM_WOODEN_SWORD)
			|| (a_ItemID == E_ITEM_STONE_SWORD)
			|| (a_ItemID == E_ITEM_IRON_SWORD)
			|| (a_ItemID == E_ITEM_GOLD_SWORD)
			|| (a_ItemID == E_ITEM_DIAMOND_SWORD);
	}



	inline bool IsHoe(short a_ItemID)
	{
		return (a_ItemID == E_ITEM_WOODEN_HOE)
			|| (a_ItemID == E_ITEM_STONE_HOE)
			|| (a_ItemID == E_ITEM_IRON_HOE)
			|| (a_ItemID == E_ITEM_GOLD_HOE)
			|| (a_ItemID == E_ITEM_DIAMOND_HOE);
	}



	inline bool IsShovel(short a_ItemID)
	{
		return (a_ItemID == E_ITEM_WOODEN_SHOVEL)
			|| (a_ItemID == E_ITEM_STONE_SHOVEL)
			|| (a_ItemID == E_ITEM_IRON_SHOVEL)
			|| (a_ItemID == E_ITEM_GOLD_SHOVEL)
			|| (a_ItemID == E_ITEM_DIAMOND_SHOVEL);
	}



	inline bool IsTool(short a_ItemID)
	{
		return IsPickaxe( a_ItemID)
			|| IsAxe    ( a_ItemID)
			|| IsSword  ( a_ItemID)
			|| IsHoe    ( a_ItemID)
			|| IsShovel ( a_ItemID);
	}



	inline bool IsHelmet(short a_ItemType)
	{
		return (
			(a_ItemType == E_ITEM_LEATHER_CAP) ||
			(a_ItemType == E_ITEM_GOLD_HELMET) ||
			(a_ItemType == E_ITEM_CHAIN_HELMET) ||
			(a_ItemType == E_ITEM_IRON_HELMET) ||
			(a_ItemType == E_ITEM_DIAMOND_HELMET)
		);
	}



	inline bool IsChestPlate(short a_ItemType)
	{
		return (
			(a_ItemType == E_ITEM_LEATHER_TUNIC) ||
			(a_ItemType == E_ITEM_GOLD_CHESTPLATE) ||
			(a_ItemType == E_ITEM_CHAIN_CHESTPLATE) ||
			(a_ItemType == E_ITEM_IRON_CHESTPLATE) ||
			(a_ItemType == E_ITEM_DIAMOND_CHESTPLATE)
		);
	}



	inline bool IsLeggings(short a_ItemType)
	{
		return (
			(a_ItemType == E_ITEM_LEATHER_PANTS) ||
			(a_ItemType == E_ITEM_GOLD_LEGGINGS) ||
			(a_ItemType == E_ITEM_CHAIN_LEGGINGS) ||
			(a_ItemType == E_ITEM_IRON_LEGGINGS) ||
			(a_ItemType == E_ITEM_DIAMOND_LEGGINGS)
		);
	}



	inline bool IsBoots(short a_ItemType)
	{
		return (
			(a_ItemType == E_ITEM_LEATHER_BOOTS) ||
			(a_ItemType == E_ITEM_GOLD_BOOTS) ||
			(a_ItemType == E_ITEM_CHAIN_BOOTS) ||
			(a_ItemType == E_ITEM_IRON_BOOTS) ||
			(a_ItemType == E_ITEM_DIAMOND_BOOTS)
		);
	}



	inline bool IsArmor(short a_ItemType)
	{
		return (
			IsHelmet(a_ItemType) ||
			IsChestPlate(a_ItemType) ||
			IsLeggings(a_ItemType) ||
			IsBoots(a_ItemType)
		);
	}
}

// tolua_end