/***************************************************************************

  M.A.M.E.32  -  Multiple Arcade Machine Emulator for Win32
  Win32 Portions Copyright (C) 1997-2001 Michael Soderstrom and Chris Kirmse

  This file is part of MAME32, and may only be used, modified and
  distributed under the terms of the MAME license, in "readme.txt".
  By continuing to use, modify or distribute this file you indicate
  that you have read the license and understand and accept it fully.

 ***************************************************************************/

/***************************************************************************

  DIJoystick.c

 ***************************************************************************/

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <dinput.h>
#include <assert.h>
#include <stdio.h>
#include <math.h>
#include "MAME32.h"
#include "DirectInput.h"
#include "DIJoystick.h"
#include "M32Util.h"
#include "dxdecode.h"

/***************************************************************************
    function prototypes
 ***************************************************************************/

static int  DIJoystick_init(void);
static void DIJoystick_exit(void);
static void DIJoystick_poll_joysticks(void);
static int  DIJoystick_is_joy_pressed(int joycode);
static BOOL DIJoystick_Available(void);

static BOOL CALLBACK DIJoystick_EnumDeviceProc(LPDIDEVICEINSTANCE pdidi, LPVOID pv);

/***************************************************************************
    External variables
 ***************************************************************************/

struct OSDJoystick  DIJoystick = 
{
	DIJoystick_init,                /* init              */
	DIJoystick_exit,                /* exit              */
	DIJoystick_is_joy_pressed,      /* joy_pressed       */
	DIJoystick_poll_joysticks,      /* poll_joysticks    */
	DIJoystick_Available,           /* Available         */
};

/***************************************************************************
    Internal structures
 ***************************************************************************/

#define MAX_PHYSICAL_JOYSTICKS 20
#define MAX_AXES               20

typedef struct
{
	GUID guid;
	char *name;

	int offset; /* offset in dijoystate */
} axis_type;

typedef struct
{
	BOOL use_joystick;

	GUID guidDevice;
	char *name;

	BOOL is_light_gun;

	LPDIRECTINPUTDEVICE2 did;

	DWORD num_axes;
	axis_type axes[MAX_AXES];

	DWORD num_pov;
	DWORD num_buttons;

	DIJOYSTATE dijs;

} joystick_type;

struct tDIJoystick_private
{
	int   use_count; /* the gui and game can both init/exit us, so keep track */
	BOOL  m_bCoinSlot;

	DWORD num_joysticks;
	joystick_type joysticks[MAX_PHYSICAL_JOYSTICKS]; /* actual joystick data! */
};

/* internal functions needing our declarations */
static BOOL CALLBACK DIJoystick_EnumAxisObjectsProc(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef);
static BOOL CALLBACK DIJoystick_EnumPOVObjectsProc(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef);
static BOOL CALLBACK DIJoystick_EnumButtonObjectsProc(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef);
static void ClearJoyState(DIJOYSTATE *pdijs);

static void InitJoystick(joystick_type *joystick);
static void ExitJoystick(joystick_type *joystick);

/***************************************************************************
    Internal variables
 ***************************************************************************/

static struct tDIJoystick_private   This;

static const GUID guidNULL = {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0}};

/***************************************************************************
    External OSD functions  
 ***************************************************************************/
/*
    put here anything you need to do when the program is started. Return 0 if 
    initialization was successful, nonzero otherwise.
*/
static int DIJoystick_init(void)
{
	DWORD	i;
	HRESULT hr;

	This.use_count++;

	This.num_joysticks = 0;

	if (di == NULL)
	{
		ErrorMsg("DirectInput not initialized");
		return 0;
	}

	/* enumerate for joystick devices */
	hr = IDirectInput_EnumDevices(di, DIDEVTYPE_JOYSTICK,
				 (LPDIENUMDEVICESCALLBACK)DIJoystick_EnumDeviceProc,
				 NULL,
				 DIEDFL_ATTACHEDONLY);
	if (FAILED(hr))
	{
		ErrorMsg("DirectInput EnumDevices() failed: %s", DirectXDecodeError(hr));
		return 0;
	}

	/* create each joystick device, enumerate each joystick for axes, etc */
	for (i = 0; i < This.num_joysticks; i++)
	{
		InitJoystick(&This.joysticks[i]);
	}

	/* Are there any joysticks attached? */
	if (This.num_joysticks < 1)
	{
		/*ErrorMsg("DirectInput EnumDevices didn't find any joysticks");*/
		return 0;
	}
	
	return 0;
}

/*
	put here cleanup routines to be executed when the program is terminated.
*/
static void DIJoystick_exit(void)
{
	DWORD i;

	This.use_count--;

	if (This.use_count > 0)
		return;

	for (i = 0; i < This.num_joysticks; i++)
		ExitJoystick(&This.joysticks[i]);
	
	This.num_joysticks = 0;
}

static void DIJoystick_poll_joysticks(void)
{
	HRESULT hr;
	DWORD	i;
	
	This.m_bCoinSlot = 0;

	for (i = 0; i < This.num_joysticks; i++)
	{
		/* start by clearing the structure, then fill it in if possible */

		ClearJoyState(&This.joysticks[i].dijs);

		if (This.joysticks[i].did == NULL)
			continue;

		if (This.joysticks[i].use_joystick == FALSE)
			continue;

		hr = IDirectInputDevice2_Poll(This.joysticks[i].did);

		hr = IDirectInputDevice2_GetDeviceState(This.joysticks[i].did,sizeof(DIJOYSTATE),
												&This.joysticks[i].dijs);
		if (FAILED(hr))
		{
			if (hr == DIERR_INPUTLOST || hr == DIERR_NOTACQUIRED)
			{
				hr = IDirectInputDevice2_Acquire(This.joysticks[i].did);
			}
			continue;
		}
	}
}

/*
	check if the DIJoystick is moved in the specified direction, defined in
	osdepend.h. Return 0 if it is not pressed, nonzero otherwise.
*/

static int DIJoystick_is_joy_pressed(int joycode)
{
	int joy_num;
	int stick;
	int axis;
	int dir;

	DIJOYSTATE dijs;

	int value;
	int dz = 60;

	joy_num = GET_JOYCODE_JOY(joycode);

	/* do we have as many sticks? */
	if (joy_num == 0 || This.num_joysticks < joy_num)
		return 0;
	joy_num--;
	
	if (This.joysticks[joy_num].use_joystick == FALSE)
		return 0;

	dijs = This.joysticks[joy_num].dijs;

	stick = GET_JOYCODE_STICK(joycode);

	if (stick == JOYCODE_STICK_BTN)
	{
		/* buttons */
		int button;

		button = GET_JOYCODE_BUTTON(joycode);
		button--;

		if (button >= This.joysticks[joy_num].num_buttons
		||	GET_JOYCODE_DIR(joycode) != JOYCODE_DIR_BTN)
			return 0;

		return dijs.rgbButtons[button] != 0;
	}

	if (stick == JOYCODE_STICK_POV)
	{
		/* POV */
		int pov_value;
		int angle;
		int axis_value;

		int num_pov = GET_JOYCODE_BUTTON(joycode) / 4;
		int code	= GET_JOYCODE_BUTTON(joycode) % 4;
		axis = code / 2;
		dir  = code % 2;

		if (num_pov >= This.joysticks[joy_num].num_pov)
			return 0;

		pov_value = dijs.rgdwPOV[num_pov];
		if (LOWORD(pov_value) == 0xffff)
			return 0;

		angle = (pov_value + 27000) % 36000;
		angle = (36000 - angle) % 36000;
		angle /= 100;

		/* angle is now in degrees counterclockwise from x axis*/
		if (axis == 1)
			axis_value = 128 + (int)(127 * cos(2 * PI * angle / 360.0)); /* x */
		else
			axis_value = 128 + (int)(127 * sin(2 * PI * angle / 360.0)); /* y */

		if (dir == 1)
			return axis_value <= (128 - 128 * dz / 100);
		else
			return axis_value >= (128 + 128 * dz / 100);
	}

	/* sticks */
	
	axis = GET_JOYCODE_AXIS(joycode);
	dir  = GET_JOYCODE_DIR(joycode);
	
	if (axis == 0 || This.joysticks[joy_num].num_axes < axis)
		return 0;
	axis--;

	value = *(int *)(((byte *)&dijs) + This.joysticks[joy_num].axes[axis].offset);

	if (dir == JOYCODE_DIR_NEG)
		return value <= (128 - 128 * dz / 100);
	else
		return value >= (128 + 128 * dz / 100);
}

static BOOL DIJoystick_Available(void)
{
	static BOOL bBeenHere = FALSE;
	static BOOL bAvailable = FALSE;
	HRESULT 	hr;
	GUID		guidDevice = guidNULL;
	LPDIRECTINPUTDEVICE didTemp;
	LPDIRECTINPUTDEVICE didJoystick;

	if (di == NULL)
	{
		return FALSE;
	}

	if (bBeenHere == FALSE)
		bBeenHere = TRUE;
	else
		return bAvailable;

	/* enumerate for joystick devices */
	hr = IDirectInput_EnumDevices(di, DIDEVTYPE_JOYSTICK,
								  inputEnumDeviceProc,
								  &guidDevice,
								  DIEDFL_ATTACHEDONLY);
	if (FAILED(hr))
	{
		return FALSE;
	}

	/* Are there any joysticks attached? */
	if (IsEqualGUID(&guidDevice, &guidNULL))
	{
		return FALSE;
	}

	hr = IDirectInput_CreateDevice(di, &guidDevice, &didTemp, NULL);
	if (FAILED(hr))
	{
		return FALSE;
	}

	/* Determine if DX5 is available by a QI for a DX5 interface. */
	hr = IDirectInputDevice_QueryInterface(didTemp,
										   &IID_IDirectInputDevice2,
										   (void**)&didJoystick);
	if (FAILED(hr))
	{
		bAvailable = FALSE;
	}
	else
	{
		bAvailable = TRUE;
		IDirectInputDevice_Release(didJoystick);
	}

	/* dispose of the temp interface */
	IDirectInputDevice_Release(didTemp);

	return bAvailable;
}

int DIJoystick_GetNumPhysicalJoysticks()
{
	return This.num_joysticks;
}

char* DIJoystick_GetPhysicalJoystickName(int num_joystick)
{
	return This.joysticks[num_joystick].name;
}

int DIJoystick_GetNumPhysicalJoystickAxes(int num_joystick)
{
	return This.joysticks[num_joystick].num_axes;
}

char* DIJoystick_GetPhysicalJoystickAxisName(int num_joystick, int num_axis)
{
	return This.joysticks[num_joystick].axes[num_axis].name;
}

/***************************************************************************
	Internal functions
 ***************************************************************************/

BOOL CALLBACK DIJoystick_EnumDeviceProc(LPDIDEVICEINSTANCE pdidi, LPVOID pv)
{
	char buffer[5000];

	This.joysticks[This.num_joysticks].guidDevice = pdidi->guidInstance;

	sprintf(buffer, "%s (%s)", pdidi->tszProductName, pdidi->tszInstanceName);
	This.joysticks[This.num_joysticks].name = (char *)malloc(strlen(buffer) + 1);
	strcpy(This.joysticks[This.num_joysticks].name, buffer);

	This.num_joysticks++;

	return DIENUM_CONTINUE;
	}

static BOOL CALLBACK DIJoystick_EnumAxisObjectsProc(LPCDIDEVICEOBJECTINSTANCE lpddoi,
													LPVOID pvRef)
{
	joystick_type* joystick = (joystick_type*)pvRef;
	DIPROPRANGE diprg;
	HRESULT hr;

	joystick->axes[joystick->num_axes].guid = lpddoi->guidType;

	joystick->axes[joystick->num_axes].name = (char *)malloc(strlen(lpddoi->tszName) + 1);
	strcpy(joystick->axes[joystick->num_axes].name, lpddoi->tszName);

	joystick->axes[joystick->num_axes].offset = lpddoi->dwOfs;

	/*ErrorMsg("got axis %s, offset %i",lpddoi->tszName, lpddoi->dwOfs);*/

	diprg.diph.dwSize		= sizeof(diprg);
	diprg.diph.dwHeaderSize = sizeof(diprg.diph);
	diprg.diph.dwObj		= lpddoi->dwOfs;
	diprg.diph.dwHow		= DIPH_BYOFFSET;
	diprg.lMin				= 0;
	diprg.lMax				= 255;

	hr = IDirectInputDevice2_SetProperty(joystick->did, DIPROP_RANGE, &diprg.diph);
	if (FAILED(hr)) /* if this fails, don't use this axis */
	{
		free(joystick->axes[joystick->num_axes].name);
		joystick->axes[joystick->num_axes].name = NULL;
		return DIENUM_CONTINUE;
	}

#ifdef JOY_DEBUG
	if (FAILED(hr))
	{
		ErrorMsg("DirectInput SetProperty() joystick axis %s failed - %s\n",
				 joystick->axes[joystick->num_axes].name,
				 DirectXDecodeError(hr));
	}
#endif
	
	/* Set axis dead zone to 0; we need accurate #'s for analog joystick reading. */

	hr = SetDIDwordProperty(joystick->did, DIPROP_DEADZONE, lpddoi->dwOfs, DIPH_BYOFFSET, 0);

#ifdef JOY_DEBUG
	if (FAILED(hr))
	{
		ErrorMsg("DirectInput SetProperty() joystick axis %s dead zone failed - %s\n",
				 joystick->axes[joystick->num_axes].name,
				 DirectXDecodeError(hr));
	}
#endif

	joystick->num_axes++;

	return DIENUM_CONTINUE;
}

static BOOL CALLBACK DIJoystick_EnumPOVObjectsProc(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef)
{
	joystick_type* joystick = (joystick_type*)pvRef;
	joystick->num_pov++;

	return DIENUM_CONTINUE;
}

static BOOL CALLBACK DIJoystick_EnumButtonObjectsProc(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef)
{
	joystick_type* joystick = (joystick_type*)pvRef;
	joystick->num_buttons++;

	return DIENUM_CONTINUE;
}

static void ClearJoyState(DIJOYSTATE *pdijs)
{
	memset(pdijs, 0, sizeof(DIJOYSTATE));
	pdijs->lX			= 128;
	pdijs->lY			= 128;
	pdijs->lZ			= 128;
	pdijs->lRx			= 128;
	pdijs->lRy			= 128;
	pdijs->lRz			= 128;
	pdijs->rglSlider[0] = 128;
	pdijs->rglSlider[1] = 128;
	pdijs->rgdwPOV[0]	= -1;
	pdijs->rgdwPOV[1]	= -1;
	pdijs->rgdwPOV[2]	= -1;
	pdijs->rgdwPOV[3]	= -1;
}

static void InitJoystick(joystick_type *joystick)
{
	LPDIRECTINPUTDEVICE didTemp;
	HRESULT hr;

	joystick->use_joystick = FALSE;

	joystick->did	   = NULL;
	joystick->num_axes = 0;

	joystick->is_light_gun = (strcmp(joystick->name, "ACT LABS GS (ACT LABS GS)") == 0);

	/* get a did1 interface first... */
	hr = IDirectInput_CreateDevice(di, &joystick->guidDevice, &didTemp, NULL);
	if (FAILED(hr))
	{
		ErrorMsg("DirectInput CreateDevice() joystick failed: %s\n", DirectXDecodeError(hr));
		return;
	}
	
	/* get a did2 interface to work with polling (most) joysticks */
	hr = IDirectInputDevice_QueryInterface(didTemp,
										   &IID_IDirectInputDevice2,
										   (void**)&joystick->did);

	/* dispose of the temp interface */
	IDirectInputDevice_Release(didTemp);

	/* check result of getting the did2 */
	if (FAILED(hr))
	{
		/* no error message because this happens in dx3 */
		/* ErrorMsg("DirectInput QueryInterface joystick failed\n"); */
		joystick->did = NULL;
		return;
	}

	
	hr = IDirectInputDevice2_SetCooperativeLevel(joystick->did, GetMainWindow(),
												 DISCL_NONEXCLUSIVE | DISCL_BACKGROUND);
	if (FAILED(hr))
	{
		ErrorMsg("DirectInput SetCooperativeLevel() joystick failed: %s\n", DirectXDecodeError(hr));
		return;
	}


	hr = IDirectInputDevice2_SetDataFormat(joystick->did, &c_dfDIJoystick);
	if (FAILED(hr))
	{
		ErrorMsg("DirectInput SetDataFormat() joystick failed: %s\n", DirectXDecodeError(hr));
		return;
	}

	if (joystick->is_light_gun)
	{
		/* setup light gun to report raw screen pixel data */

		DIPROPDWORD diprop;
		memset(&diprop, 0, sizeof(diprop));
		diprop.diph.dwSize		 = sizeof(DIPROPDWORD);
		diprop.diph.dwHeaderSize = sizeof(DIPROPHEADER);
		diprop.diph.dwObj		 = 0;
		diprop.diph.dwHow		 = DIPH_DEVICE;
		diprop.dwData			 = DIPROPCALIBRATIONMODE_RAW;

		IDirectInputDevice2_SetProperty(joystick->did, DIPROP_CALIBRATIONMODE, &diprop.diph);
	}
	else
	{
		/* enumerate our axes */
		hr = IDirectInputDevice_EnumObjects(joystick->did,
											DIJoystick_EnumAxisObjectsProc,
											joystick,
											DIDFT_AXIS);
		if (FAILED(hr))
		{
			ErrorMsg("DirectInput EnumObjects() Axes failed: %s\n", DirectXDecodeError(hr));
			return;
		}

		/* enumerate our POV hats */
		joystick->num_pov = 0;
		hr = IDirectInputDevice_EnumObjects(joystick->did,
											DIJoystick_EnumPOVObjectsProc,
											joystick,
											DIDFT_POV);
		if (FAILED(hr))
		{
			ErrorMsg("DirectInput EnumObjects() POVs failed: %s\n", DirectXDecodeError(hr));
			return;
		}
	}

	/* enumerate our buttons */

	joystick->num_buttons = 0;
	hr = IDirectInputDevice_EnumObjects(joystick->did,
										DIJoystick_EnumButtonObjectsProc,
										joystick,
										DIDFT_BUTTON);
	if (FAILED(hr))
	{
		ErrorMsg("DirectInput EnumObjects() Buttons failed: %s\n", DirectXDecodeError(hr));
		return;
	}

	hr = IDirectInputDevice2_Acquire(joystick->did);
	if (FAILED(hr)) 
	{
		ErrorMsg("DirectInputDevice Acquire joystick failed!\n");
		return;
	}

	/* start by clearing the structures */

	ClearJoyState(&joystick->dijs);

	joystick->use_joystick = TRUE;
}

static void ExitJoystick(joystick_type *joystick)
{
	DWORD i;
	
	if (joystick->did != NULL)
	{
		IDirectInputDevice_Unacquire(joystick->did);
		IDirectInputDevice_Release(joystick->did);
		joystick->did = NULL;
	}
	
	for (i = 0; i < joystick->num_axes; i++)
	{
		if (joystick->axes[i].name)
			free(joystick->axes[i].name);
		joystick->axes[i].name = NULL;
	}
	
	if (joystick->name != NULL)
	{
		free(joystick->name);
		joystick->name = NULL;
	}
}

