/*
 * keyboard.c
 * MACT library -to- JonoF's Build Port Keyboard Glue
 *
 * by Jonathon Fowler
 *
 * Since we don't have the source to the MACT library I've had to
 * concoct some magic to glue its idea of controllers into that of
 * my Build port.
 *
 */
//-------------------------------------------------------------------------
/*
Duke Nukem Copyright (C) 1996, 2003 3D Realms Entertainment

This file is part of Duke Nukem 3D version 1.5 - Atomic Edition

Duke Nukem 3D 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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
//-------------------------------------------------------------------------

#include "compat.h"

#include "keyboard.h"
#include "control.h"


kb_scancode KB_LastScan;

static int32_t numpad = 0;

// translation table for taking key names to scancodes and back again
static struct
{
    const char *key;
    kb_scancode sc;
} sctokeylut[] =
{
    { "Escape", 0x1 },
    { "1", 0x2 },
    { "2", 0x3 },
    { "3", 0x4 },
    { "4", 0x5 },
    { "5", 0x6 },
    { "6", 0x7 },
    { "7", 0x8 },
    { "8", 0x9 },
    { "9", 0xa },
    { "0", 0xb },
    { "-", 0xc },
    { "=", 0xd },
    { "BakSpc", 0xe },
    { "Tab", 0xf },
    { "Q", 0x10 },
    { "W", 0x11 },
    { "E", 0x12 },
    { "R", 0x13 },
    { "T", 0x14 },
    { "Y", 0x15 },
    { "U", 0x16 },
    { "I", 0x17 },
    { "O", 0x18 },
    { "P", 0x19 },
    { "[", 0x1a },
    { "]", 0x1b },
    { "Enter", 0x1c },
    { "LCtrl", 0x1d },
    { "A", 0x1e },
    { "S", 0x1f },
    { "D", 0x20 },
    { "F", 0x21 },
    { "G", 0x22 },
    { "H", 0x23 },
    { "J", 0x24 },
    { "K", 0x25 },
    { "L", 0x26 },
    { ";", 0x27 },
    { "'", 0x28 },
    { "`", 0x29 },
    { "LShift", 0x2a },
    { "\\", 0x2b },
    { "Z", 0x2c },
    { "X", 0x2d },
    { "C", 0x2e },
    { "V", 0x2f },
    { "B", 0x30 },
    { "N", 0x31 },
    { "M", 0x32 },
    { ",", 0x33 },
    { ".", 0x34 },
    { "/", 0x35 },
    { "RShift", 0x36 },
    { "Kpad*", 0x37 },
    { "LAlt", 0x38 },
    { "Space", 0x39 },
    { "CapLck", 0x3a },
    { "F1", 0x3b },
    { "F2", 0x3c },
    { "F3", 0x3d },
    { "F4", 0x3e },
    { "F5", 0x3f },
    { "F6", 0x40 },
    { "F7", 0x41 },
    { "F8", 0x42 },
    { "F9", 0x43 },
    { "F10", 0x44 },
    { "NumLck", 0x45 },
    { "ScrLck", 0x46 },
    { "Kpad7", 0x47 },
    { "Kpad8", 0x48 },
    { "Kpad9", 0x49 },
    { "Kpad-", 0x4a },
    { "Kpad4", 0x4b },
    { "Kpad5", 0x4c },
    { "Kpad6", 0x4d },
    { "Kpad+", 0x4e },
    { "Kpad1", 0x4f },
    { "Kpad2", 0x50 },
    { "Kpad3", 0x51 },
    { "Kpad0", 0x52 },
    { "Kpad.", 0x53 },
    { "F11", 0x57 },
    { "F12", 0x58 },
    { "KpdEnt", 0x9c },
    { "RCtrl", 0x9d },
    { "Kpad/", 0xb5 },
    { "RAlt", 0xb8 },
    { "PrtScn", 0xb7 },
    { "Pause", 0xc5 },
    { "Home", 0xc7 },
    { "Up", 0xc8 },
    { "PgUp", 0xc9 },
    { "Left", 0xcb },
    { "Right", 0xcd },
    { "End", 0xcf },
    { "Down", 0xd0 },
    { "PgDn", 0xd1 },
    { "Insert", 0xd2 },
    { "Delete", 0xd3 },
};

// translation table for turning scancode into ascii characters
/*
static char sctoasc[2][256] = {
	{
//      0    1    2    3    4    5    6    7    8    9    a    b    c    d    e    f
	0,   27,  '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 8,   9,   // 0x00
	'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', 13,  0,   'a', 's', // 0x10
	'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'','`', 0,   '\\','z', 'x', 'c', 'v', // 0x20
	'b', 'n', 'm', ',', '.', '/', 0,   '*', 0,   ' ', 0,   0,   0,   0,   0,   0,   // 0x30
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   '-', 0,   0,   0,   '+', 0,   // 0x40
	0,   0,   0,   '.', 0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x50
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x60
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x70
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x80
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   13,  0,   0,   0,   // 0x90
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xa0
	0,   0,   0,   0,   0,   '/', 0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xb0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xc0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xd0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xe0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0    // 0xf0
	},
	{
//      0    1    2    3    4    5    6    7    8    9    a    b    c    d    e    f
	0,   27,  '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 8,   9,   // 0x00
	'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', 13,  0,   'A', 'S', // 0x10
	'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~', 0,   '|', 'Z', 'X', 'C', 'V', // 0x20
	'B', 'N', 'M', '<', '>', '?', 0,   '*', 0,   ' ', 0,   0,   0,   0,   0,   0,   // 0x30
	0,   0,   0,   0,   0,   0,   0,   '7', '8', '9', '-', '4', '5', '6', '+', '1', // 0x40
	'2', '3', '0', '.', 0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x50
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x60
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x70
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0x80
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   13,  0,   0,   0,   // 0x90
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xa0
	0,   0,   0,   0,   0,   '/', 0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xb0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xc0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xd0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   // 0xe0
	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0    // 0xf0
	}
};
*/

int32_t KB_KeyWaiting(void)
{
    return bkbhit();
//	return (keyfifoplc != keyfifoend);
}

char KB_Getch(void)
{
    /*
    	uint8_t ch;
    	char shifted;
    	if (keyfifoplc == keyfifoend) return 0;
    	ch = keyfifo[keyfifoplc];
    	keyfifoplc = ((keyfifoplc+2)&(KEYFIFOSIZ-1));

    	shifted = ((keystatus[0x2a]!=0)||(keystatus[0x36]!=0));
    	if (ch >= 0x47 && ch <= 0x52) shifted = numpad;

    	return sctoasc[shifted][ch];
    */
    return (char)bgetchar();
}

void KB_FlushKeyboardQueue(void)
{
    //keyfifoplc = keyfifoend = 0;
    bflushchars();
}

void KB_ClearKeysDown(void)
{
    KB_LastScan = 0;
    memset(keystatus, 0, sizeof(keystatus));
    //keyfifoplc = keyfifoend = 0;
    //bflushchars();
}

const char *KB_ScanCodeToString(kb_scancode scancode)
{
    uint32_t s;

    for (s=0; s < (sizeof(sctokeylut)/sizeof(sctokeylut[0])); s++)
        if (sctokeylut[s].sc == scancode) return sctokeylut[s].key;

    return "";
}

kb_scancode KB_StringToScanCode(const char * string)
{
    uint32_t s;

    for (s=0; s < (sizeof(sctokeylut)/sizeof(sctokeylut[0])); s++)
        if (!Bstrcasecmp(sctokeylut[s].key, string)) return sctokeylut[s].sc;

    return 0;
}

void KB_TurnKeypadOn(void)
{
    numpad = 1;
}

void KB_TurnKeypadOff(void)
{
    numpad = 0;
}

int32_t KB_KeypadActive(void)
{
    return numpad;
}

static void KB_KeyEvent(int32_t scancode, int32_t keypressed)
{
    if (keypressed) KB_LastScan = scancode;
}

void KB_Startup(void)
{
    numpad = 0;
    setkeypresscallback(KB_KeyEvent);
}

void KB_Shutdown(void)
{
    setkeypresscallback((void(*)(int32_t,int32_t))NULL);
}