/* vim: set ts=8 sw=8 sts=8 noet tw=78:
 *
 * tup - A file-based build system
 *
 * Copyright (C) 2010-2015  Mike Shal <marfey@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <stdio.h>
#include <stdarg.h>
#include <windows.h>

int __wrap___mingw_vprintf(const char *format, va_list ap);
int __real___mingw_vprintf(const char *format, va_list ap);

int __wrap___mingw_vfprintf(FILE *stream, const char *format, va_list ap);
int __real___mingw_vfprintf(FILE *stream, const char *format, va_list ap);


static char * handle_color( HANDLE output, char *p )
{
	enum { fmask = FOREGROUND_BLUE + FOREGROUND_GREEN + FOREGROUND_RED + FOREGROUND_INTENSITY };
	enum { bmask = BACKGROUND_BLUE + BACKGROUND_GREEN + BACKGROUND_RED + BACKGROUND_INTENSITY };
	static DWORD color = FOREGROUND_BLUE + FOREGROUND_GREEN + FOREGROUND_RED;
	static int reverted = 0;

	int v = 0;
	while( *p >= '0' && *p <= '9' ) {
		v = v * 10 + *p++ - '0';
	}

	switch( v ) {
	case 0:
		reverted = 0;
		color = FOREGROUND_BLUE + FOREGROUND_GREEN + FOREGROUND_RED;
		break;
	case 7:
		reverted = 1;
		break;
	case 31:
		color = ( color & ~fmask ) | FOREGROUND_RED | FOREGROUND_INTENSITY;
		break;
	case 32:
		color = ( color & ~fmask ) | FOREGROUND_GREEN | FOREGROUND_INTENSITY;
		break;
	case 33:
		color = ( color & ~fmask ) | FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_INTENSITY;
		break;
	case 34:
		color = ( color & ~fmask ) | FOREGROUND_BLUE | FOREGROUND_INTENSITY;
		break;
	case 35:
		color = ( color & ~fmask ) | FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY;
		break;
	case 36:
		color = ( color & ~fmask ) | FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_INTENSITY;
		break;
	case 37:
		color = ( color & ~fmask ) | FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY;
		break;
	case 41:
		color = ( color & ~bmask ) | BACKGROUND_RED | BACKGROUND_INTENSITY;
		break;
	default:;
	}

	SetConsoleTextAttribute(
		output,
		reverted? ( ( color & fmask ) << 4 ) | ( ( color & bmask ) >> 4 ) : color );
	return p;
}

static void parse( HANDLE output, char *p )
{
	char *out = p;
	while( *p ) {
		if( *p++ != ''  )
			continue;

		DWORD dummy;
		WriteConsole( output, out, p - 1 - out, &dummy, NULL );

		if( *p == '[' )
			p++;

		p = handle_color( output, p );

		while( *p == ';' ) {
			p++;
			p = handle_color( output, p );
		}

		if( *p == 'm' )
			p++;

		out = p;
	}

	DWORD dummy;
	WriteConsole( output, out, p - out, &dummy, NULL );
}

int __wrap___mingw_vprintf(const char *format, va_list ap)
{
	return __wrap___mingw_vfprintf( stdout, format, ap );
}

int __wrap___mingw_vfprintf(FILE *stream, const char *format, va_list ap)
{
	int rc;
	DWORD dummy;
	union {
		HANDLE h;
		intptr_t v;
	} handle;
	handle.v = _get_osfhandle( fileno( stream ) );
	if( GetConsoleMode( handle.h, &dummy ) ) {
		char buf[32 * 1024];
		rc = vsnprintf( buf, sizeof( buf ), format, ap );
		parse( handle.h, buf );
		return rc;
	}
	else
		rc = __real___mingw_vfprintf(stream, format, ap);

	fflush(stream);
	return rc;
}
