/*
 * Portions of this file are copyright Rebirth contributors and licensed as
 * described in COPYING.txt.
 * Portions of this file are copyright Parallax Software and licensed
 * according to the Parallax license below.
 * See COPYING.txt for license details.

THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
*/

/*
 *
 * Header for wall.c
 *
 */

#pragma once
#include "segment.h"

#ifdef __cplusplus
#include "fwd-wall.h"
#include "pack.h"

namespace dcx {

#if defined(DXX_BUILD_DESCENT_I) || defined(DXX_BUILD_DESCENT_II)
struct WALL_IS_DOORWAY_mask_t
{
	unsigned value;
	template <unsigned F>
		constexpr WALL_IS_DOORWAY_mask_t(WALL_IS_DOORWAY_FLAG<F>) :
			value(F)
	{
	}
};

struct WALL_IS_DOORWAY_result_t
{
	unsigned value;
	template <unsigned F>
		constexpr WALL_IS_DOORWAY_result_t(WALL_IS_DOORWAY_sresult_t<F>) :
			value(F)
	{
	}
	template <unsigned F>
		unsigned operator&(WALL_IS_DOORWAY_FLAG<F>) const
		{
			return value & F;
		}
	template <unsigned F>
		WALL_IS_DOORWAY_result_t operator|=(WALL_IS_DOORWAY_FLAG<F>)
		{
			value |= F;
			return *this;
		}
	template <unsigned F>
	bool operator==(WALL_IS_DOORWAY_sresult_t<F>) const
	{
		return value == F;
	}
	bool operator&(WALL_IS_DOORWAY_mask_t m) const
	{
		return value & m.value;
	}
	bool operator==(WALL_IS_DOORWAY_result_t) const = delete;
	template <typename T>
		bool operator!=(const T &t) const
		{
			return !(*this == t);
		}
};
#endif

struct stuckobj : public prohibit_void_ptr<stuckobj>
{
	objnum_t objnum;
	wallnum_t wallnum;
	object_signature_t signature;
};

//Start old wall structures

struct v16_wall : public prohibit_void_ptr<v16_wall>
{
	sbyte   type;               // What kind of special wall.
	sbyte   flags;              // Flags for the wall.
	uint8_t   trigger;            // Which trigger is associated with the wall.
	fix     hps;                // "Hit points" of the wall.
	sbyte   clip_num;           // Which animation associated with the wall.
	sbyte   keys;
};

struct v19_wall : public prohibit_void_ptr<v19_wall>
{
	segnum_t     segnum;
	sbyte   type;               // What kind of special wall.
	sbyte   flags;              // Flags for the wall.
	int	sidenum;     // Seg & side for this wall
	fix     hps;                // "Hit points" of the wall.
	uint8_t   trigger;            // Which trigger is associated with the wall.
	sbyte   clip_num;           // Which animation associated with the wall.
	sbyte   keys;
	int linked_wall;            // number of linked wall
};

}

//End old wall structures

#ifdef dsx
namespace dsx {

struct wall : public prohibit_void_ptr<wall>
{
	segnum_t segnum;
	int8_t  sidenum;     // Seg & side for this wall
	uint8_t type;               // What kind of special wall.
	fix     hps;                // "Hit points" of the wall.
	wallnum_t linked_wall;        // number of linked wall
	ubyte   flags;              // Flags for the wall.
	ubyte   state;              // Opening, closing, etc.
	uint8_t   trigger;            // Which trigger is associated with the wall.
	sbyte   clip_num;           // Which animation associated with the wall.
	ubyte   keys;               // which keys are required
#if defined(DXX_BUILD_DESCENT_II)
	sbyte   controlling_trigger;// which trigger causes something to happen here.  Not like "trigger" above, which is the trigger on this wall.
                                //  Note: This gets stuffed at load time in gamemine.c.  Don't try to use it in the editor.  You will be sorry!
	sbyte   cloak_value;        // if this wall is cloaked, the fade value
#endif
};

}
#endif

namespace dcx {

struct active_door : public prohibit_void_ptr<active_door>
{
	unsigned n_parts;            // for linked walls
	array<wallnum_t, 2>   front_wallnum;   // front wall numbers for this door
	array<wallnum_t, 2>   back_wallnum;    // back wall numbers for this door
	fix     time;               // how long been opening, closing, waiting
};

}

#ifdef dsx
namespace dsx {
#if defined(DXX_BUILD_DESCENT_II)
struct cloaking_wall : public prohibit_void_ptr<cloaking_wall>
{
	wallnum_t       front_wallnum;  // front wall numbers for this door
	wallnum_t       back_wallnum;   // back wall numbers for this door
	array<fix, 4> front_ls;     // front wall saved light values
	array<fix, 4> back_ls;      // back wall saved light values
	fix     time;               // how long been cloaking or decloaking
};
#endif

DXX_VALPTRIDX_DEFINE_GLOBAL_FACTORIES(wall, wall);

struct wclip : public prohibit_void_ptr<wclip>
{
	fix     play_time;
	short   num_frames;
	union {
		array<int16_t, MAX_CLIP_FRAMES> frames;
		array<int16_t, MAX_CLIP_FRAMES_D1> d1_frames;
	};
	short   open_sound;
	short   close_sound;
	short   flags;
	array<char, 13> filename;
};

static inline ssize_t operator-(wall *w, array<wall, MAX_WALLS> &W)
{
	return w - static_cast<wall *>(&*W.begin());
}

static inline WALL_IS_DOORWAY_result_t WALL_IS_DOORWAY(const vcsegptr_t seg, const uint_fast32_t side)
{
	const auto child = seg->children[side];
	if (unlikely(child == segment_none))
		return WID_WALL;
	if (unlikely(child == segment_exit))
		return WID_EXTERNAL;
	const auto &s = seg->sides[side];
	if (likely(s.wall_num == wall_none))
		return WID_NO_WALL;
	return wall_is_doorway(s);
}
}
#endif
#endif