/*
	in_svgalib.c

	(description)

	Copyright (C) 1996-1997  Id Software, Inc.
	Copyright (C) 1999-2000  Marcus Sundberg [mackan@stacken.kth.se]
	Copyright (C) 1999,2000  contributors of the QuakeForge project
	Please see the file "AUTHORS" for a list of contributors

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <vga.h>
#include <vgakeyboard.h>
#include <vgamouse.h>

#include "cl_input.h"
#include "client.h"
#include "cmd.h"
#include "console.h"
#include "cvar.h"
#include "host.h"
#include "input.h"
#include "joystick.h"
#include "keys.h"
#include "qargs.h"
#include "sys.h"
#include "view.h"

static int  UseKeyboard = 1;
static int  UseMouse = 1;
static int  in_svgalib_inited = 0;

static unsigned char scantokey[128];
static int  mouse_buttons;
static int  mouse_buttonstate;
static int  mouse_oldbuttonstate;
static float mouse_x, mouse_y;
static float old_mouse_x, old_mouse_y;
static int  mx, my;

static void IN_InitKeyboard (void);
static void IN_InitMouse (void);

cvar_t		*_windowed_mouse;
cvar_t		*m_filter;

static void
keyhandler (int scancode, int state)
{
	int         sc;

	sc = scancode & 0x7f;
#if 0
	Con_Printf ("scancode=%x (%d%s)\n", scancode, sc,
				scancode & 0x80 ? "+128" : "");
#endif
	Key_Event (scantokey[sc], -1, state == KEY_EVENTPRESS);
}


static void
mousehandler (int buttonstate, int dx, int dy, int dz, int drx, int dry, int drz)
{
	mouse_buttonstate = buttonstate;
	mx += dx;
	my += dy;
	if (drx > 0) {
		Key_Event (K_MWHEELUP, 0, 1);
		Key_Event (K_MWHEELUP, 0, 0);
	} else if (drx < 0) {
		Key_Event (K_MWHEELDOWN, 0, 1);
		Key_Event (K_MWHEELDOWN, 0, 0);
	}
}


void
Force_CenterView_f (void)
{
	cl.viewangles[PITCH] = 0;
}


void
IN_Init (void)
{
	if (COM_CheckParm ("-nokbd"))
		UseKeyboard = 0;
	if (COM_CheckParm ("-nomouse"))
		UseMouse = 0;

	if (UseKeyboard)
		IN_InitKeyboard ();
	if (UseMouse)
		IN_InitMouse ();

	JOY_Init ();

	in_svgalib_inited = 1;
	return;
}

void
IN_Init_Cvars (void)
{
	JOY_Init_Cvars ();
	m_filter = Cvar_Get ("m_filter", "0", CVAR_NONE, NULL, "Toggle mouse input filtering.");
}

static void
IN_InitKeyboard (void)
{
	int         i;

	for (i = 0; i < 128; i++) {
		scantokey[i] = ' ';
	}

	scantokey[1] = K_ESCAPE;
	scantokey[2] = '1';
	scantokey[3] = '2';
	scantokey[4] = '3';
	scantokey[5] = '4';
	scantokey[6] = '5';
	scantokey[7] = '6';
	scantokey[8] = '7';
	scantokey[9] = '8';
	scantokey[10] = '9';
	scantokey[11] = '0';
	scantokey[12] = '-';
	scantokey[13] = '=';
	scantokey[14] = K_BACKSPACE;
	scantokey[15] = K_TAB;
	scantokey[16] = 'q';
	scantokey[17] = 'w';
	scantokey[18] = 'e';
	scantokey[19] = 'r';
	scantokey[20] = 't';
	scantokey[21] = 'y';
	scantokey[22] = 'u';
	scantokey[23] = 'i';
	scantokey[24] = 'o';
	scantokey[25] = 'p';
	scantokey[26] = '[';
	scantokey[27] = ']';
	scantokey[28] = K_ENTER;
	scantokey[29] = K_CTRL;				/* left */
	scantokey[30] = 'a';
	scantokey[31] = 's';
	scantokey[32] = 'd';
	scantokey[33] = 'f';
	scantokey[34] = 'g';
	scantokey[35] = 'h';
	scantokey[36] = 'j';
	scantokey[37] = 'k';
	scantokey[38] = 'l';
	scantokey[39] = ';';
	scantokey[40] = '\'';
	scantokey[41] = '`';
	scantokey[42] = K_SHIFT;			/* left */
	scantokey[43] = '\\';
	scantokey[44] = 'z';
	scantokey[45] = 'x';
	scantokey[46] = 'c';
	scantokey[47] = 'v';
	scantokey[48] = 'b';
	scantokey[49] = 'n';
	scantokey[50] = 'm';
	scantokey[51] = ',';
	scantokey[52] = '.';
	scantokey[53] = '/';
	scantokey[54] = K_SHIFT;			/* right */
	scantokey[55] = KP_MULTIPLY;
	scantokey[56] = K_ALT;				/* left */
	scantokey[57] = ' ';
	scantokey[58] = K_CAPSLOCK;
	scantokey[59] = K_F1;
	scantokey[60] = K_F2;
	scantokey[61] = K_F3;
	scantokey[62] = K_F4;
	scantokey[63] = K_F5;
	scantokey[64] = K_F6;
	scantokey[65] = K_F7;
	scantokey[66] = K_F8;
	scantokey[67] = K_F9;
	scantokey[68] = K_F10;
	scantokey[69] = KP_NUMLCK;
	scantokey[70] = K_SCRLCK;
	scantokey[71] = KP_HOME;
	scantokey[72] = KP_UPARROW;
	scantokey[73] = KP_PGUP;
	scantokey[74] = KP_MINUS;
	scantokey[75] = KP_LEFTARROW;
	scantokey[76] = KP_5;
	scantokey[77] = KP_RIGHTARROW;
	scantokey[79] = KP_END;
	scantokey[78] = KP_PLUS;
	scantokey[80] = KP_DOWNARROW;
	scantokey[81] = KP_PGDN;
	scantokey[82] = KP_INS;
	scantokey[83] = KP_DEL;
	/* 84 to 86 not used */
	scantokey[87] = K_F11;
	scantokey[88] = K_F12;
	/* 89 to 95 not used */
	scantokey[96] = KP_ENTER;			/* keypad enter */
	scantokey[97] = K_CTRL;				/* right */
	scantokey[98] = KP_DIVIDE;
	scantokey[99] = K_PRNTSCR;			/* print screen */
	scantokey[100] = K_ALT;				/* right */

	scantokey[101] = K_PAUSE;			/* break */
	scantokey[102] = K_HOME;
	scantokey[103] = K_UPARROW;
	scantokey[104] = K_PGUP;
	scantokey[105] = K_LEFTARROW;
	scantokey[106] = K_RIGHTARROW;
	scantokey[107] = K_END;
	scantokey[108] = K_DOWNARROW;
	scantokey[109] = K_PGDN;
	scantokey[110] = K_INS;
	scantokey[111] = K_DEL;
	scantokey[119] = K_PAUSE;

	if (keyboard_init ()) {
		Sys_Error ("keyboard_init() failed");
	}
	keyboard_seteventhandler (keyhandler);
}

static void
IN_InitMouse (void)
{
	int         mtype;
	char       *mousedev;
	int         mouserate = MOUSE_DEFAULTSAMPLERATE;

	Cmd_AddCommand ("force_centerview", Force_CenterView_f, "Force viewpoint of player to center");

	mouse_buttons = 3;

	mtype = vga_getmousetype ();

	mousedev = "/dev/mouse";
	if (getenv ("MOUSEDEV"))
		mousedev = getenv ("MOUSEDEV");
	if (COM_CheckParm ("-mdev")) {
		mousedev = com_argv[COM_CheckParm ("-mdev") + 1];
	}

	if (getenv ("MOUSERATE"))
		mouserate = atoi (getenv ("MOUSERATE"));
	if (COM_CheckParm ("-mrate")) {
		mouserate = atoi (com_argv[COM_CheckParm ("-mrate") + 1]);
	}
#if 0
	printf ("Mouse: dev=%s,type=%s,speed=%d\n",
			mousedev, mice[mtype].name, mouserate);
#endif
	if (mouse_init (mousedev, mtype, mouserate)) {
		Con_Printf ("No mouse found\n");
		UseMouse = 0;
	} else {
		mouse_seteventhandler ((void *) mousehandler);
	}
}

void
IN_Shutdown (void)
{
	JOY_Shutdown ();
	Con_Printf ("IN_Shutdown\n");

	if (UseMouse)
		mouse_close ();
	if (UseKeyboard)
		keyboard_close ();
	in_svgalib_inited = 0;
}


void
IN_SendKeyEvents (void)
{
	if (!in_svgalib_inited)
		return;

	if (UseKeyboard) {
		while ((keyboard_update ()));
	}
}


void
IN_Commands (void)
{
	JOY_Command ();
	if (UseMouse) {
		/* Poll mouse values */
		while (mouse_update ());

		/* Perform button actions */
		if ((mouse_buttonstate & MOUSE_LEFTBUTTON) &&
			!(mouse_oldbuttonstate & MOUSE_LEFTBUTTON))
				Key_Event (K_MOUSE1, 0, true);
		else if (!(mouse_buttonstate & MOUSE_LEFTBUTTON) &&
				 (mouse_oldbuttonstate & MOUSE_LEFTBUTTON))
			Key_Event (K_MOUSE1, 0, false);

		if ((mouse_buttonstate & MOUSE_RIGHTBUTTON) &&
			!(mouse_oldbuttonstate & MOUSE_RIGHTBUTTON))
				Key_Event (K_MOUSE2, 0, true);
		else if (!(mouse_buttonstate & MOUSE_RIGHTBUTTON) &&
				 (mouse_oldbuttonstate & MOUSE_RIGHTBUTTON))
			Key_Event (K_MOUSE2, 0, false);

		if ((mouse_buttonstate & MOUSE_MIDDLEBUTTON) &&
			!(mouse_oldbuttonstate & MOUSE_MIDDLEBUTTON))
				Key_Event (K_MOUSE3, 0, true);
		else if (!(mouse_buttonstate & MOUSE_MIDDLEBUTTON) &&
				 (mouse_oldbuttonstate & MOUSE_MIDDLEBUTTON))
			Key_Event (K_MOUSE3, 0, false);

		mouse_oldbuttonstate = mouse_buttonstate;
	}
}


void
IN_Move (usercmd_t *cmd)
{
	JOY_Move (cmd);
	if (!UseMouse)
		return;

	/* Poll mouse values */
	while (mouse_update ());

	if (m_filter->int_val) {
		mouse_x = (mx + old_mouse_x) * 0.5;
		mouse_y = (my + old_mouse_y) * 0.5;
	} else {
		mouse_x = mx;
		mouse_y = my;
	}
	old_mouse_x = mx;
	old_mouse_y = my;
	/* Clear for next update */
	mx = my = 0;

	mouse_x *= sensitivity->value;
	mouse_y *= sensitivity->value;

	/* Add mouse X/Y movement to cmd */
	if ((in_strafe.state & 1) || (lookstrafe->int_val && freelook)) {
		cmd->sidemove += m_side->value * mouse_x;
	} else {
		cl.viewangles[YAW] -= m_yaw->value * mouse_x;
	}

	if (freelook)
		V_StopPitchDrift ();

	if (freelook && !(in_strafe.state & 1)) {
		cl.viewangles[PITCH] += m_pitch->value * mouse_y;
		cl.viewangles[PITCH] = bound (-70, cl.viewangles[PITCH], 80);
	} else {
		if ((in_strafe.state & 1) && noclip_anglehack) {
			cmd->upmove -= m_forward->value * mouse_y;
		} else {
			cmd->forwardmove -= m_forward->value * mouse_y;
		}
	}
}