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/*

 * Copyright (C) 2006 Ondrej Palkovsky

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <async.h>

#include <ipc/fb.h>

#include <ipc/ipc.h>

#include <libc.h>

#include <errno.h>

#include <string.h>

#include <libc.h>

#include <stdio.h>

#include "sysio.h"

/* Allow only 1 connection */

static int client_connected = 0;

static void sysput(char c)

{

	__SYSCALL3(SYS_IO, 1, (sysarg_t)&c, (sysarg_t) 1);

}

static void sysputs(char *s)

{

	__SYSCALL3(SYS_IO, 1, (sysarg_t)s, strlen(s));

}

/** Send clearscreen sequence to console */

static void clrscr(void)

{

	sysputs("\033[2J");

}

/** Send ansi sequence to console to change cursor position */

static void curs_goto(unsigned int row, unsigned int col)

{

	char control[20];

	if (row > 200 || col > 200)

		return;

	snprintf(control, 20, "\033[%d;%df",row+1, col+1);

	sysputs(control);

}

static void set_style(int mode)

{

	char control[20];

	snprintf(control, 20, "\033[%dm", mode);

	sysputs(control);

}

/** ANSI terminal emulation main thread */

static void sysio_client_connection(ipc_callid_t iid, ipc_call_t *icall)

{

	int retval;

	ipc_callid_t callid;

	ipc_call_t call;

	char c;

	int lastcol=0;

	int lastrow=0;

	int newcol,newrow;

	int fgcolor,bgcolor;

	if (client_connected) {

		ipc_answer_fast(iid, ELIMIT, 0,0);

		return;

	}

	client_connected = 1;

	ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */

	while (1) {

		callid = async_get_call(&call);

 		switch (IPC_GET_METHOD(call)) {

		case IPC_M_PHONE_HUNGUP:

			client_connected = 0;

			ipc_answer_fast(callid,0,0,0);

			return; /* Exit thread */

		case FB_PUTCHAR:

			c = IPC_GET_ARG1(call);

			newrow = IPC_GET_ARG2(call);

			newcol = IPC_GET_ARG3(call);

			if (lastcol != newcol || lastrow!=newrow) 

				curs_goto(newrow, newcol);

			lastcol = newcol + 1;

			lastrow = newrow;

			sysput(c);

			retval = 0;

			break;

 		case FB_CURSOR_GOTO:

			newrow = IPC_GET_ARG1(call);

			newcol = IPC_GET_ARG2(call);

			curs_goto(newrow, newcol);

			break;

		case FB_GET_CSIZE:

			ipc_answer_fast(callid, 0, 25, 80);

			continue;

		case FB_CLEAR:

			clrscr();

			retval = 0;

			break;

		case FB_SET_STYLE:

			fgcolor = IPC_GET_ARG1(call);

			bgcolor = IPC_GET_ARG2(call);

			if (fgcolor > bgcolor)

				set_style(0);

			else

				set_style(7);

			retval = 0;

			break;

		default:

			retval = ENOENT;

		}

		ipc_answer_fast(callid,retval,0,0);

	}

}

/** ANSI terminal emulation initialization */

void sysio_init(void)

{

	async_set_client_connection(sysio_client_connection);

	clrscr();

	curs_goto(0,0);

}