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

  gbx.c

  (c) 2000-2009 Benoît Minisini <gambas@users.sourceforge.net>

  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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.

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

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "gb_common.h"
#include "gb_alloc.h"
#include "gb_error.h"

#include <dlfcn.h>
#include <stdarg.h>

#include "gbx_class.h"
#include "gbx_exec.h"
#include "gbx_stack.h"
#include "gbx_debug.h"
#include "gb_file.h"
#include "gbx_component.h"
#include "gbx_project.h"
#include "gbx_local.h"
#include "gbx_watch.h"
#include "gbx_event.h"
#include "gbx_extern.h"
#include "gbx_eval.h"
#include "gbx_subr.h"
#include "gbx_math.h"
#include "gb_common_buffer.h"

#include "gbx_api.h"

#include "gbx_c_file.h"
#include "gbx_c_application.h"

extern void _exit(int) NORETURN;
FILE *log_file;

static bool _welcome = FALSE;
static bool _quit_after_main = FALSE;

static void NORETURN my_exit(int ret)
{
  LOCAL_exit();
  COMPONENT_exit();
  EXTERN_exit();
	//fclose(log_file);
  exit(ret);
}

static void NORETURN fatal(const char *msg, ...)
{
	va_list args;

	va_start(args, msg);
	fputs(EXEC_arch ? "gbr" GAMBAS_VERSION_STRING : "gbx" GAMBAS_VERSION_STRING, stderr);
	fputs(": ", stderr);
	vfprintf(stderr, msg, args);
	va_end(args);
	putc('\n', stderr);
	my_exit(1);
} 

static void init(const char *file)
{
  COMPONENT_init();
  FILE_init();
  EXEC_init();
  CLASS_init();
  CFILE_init();
  WATCH_init();
  MATH_init();
	PROJECT_init(file);
  DEBUG_init();

	if (file)
	{
		if (PROJECT_load()) // Call STACK_init()
		{
			if (!strcmp(file, "."))
				fatal("no project file in current directory.");
			else
				fatal("no project file in '%s'.", file);
		}
	}
	else
		STACK_init();
		
 	LOCAL_init();

	if (EXEC_debug)
	{
		DEBUG.Welcome();
		DEBUG.Main(FALSE);
	}
	_welcome = TRUE;
}


static void main_exit(bool silent)
{
	// If the stack has not been initialized because the project could not be started, do it know
	if (!SP)
		STACK_init();
	
  EXTERN_release();
  STREAM_exit();
  OBJECT_exit();
	CLASS_clean_up(silent);
  SUBR_exit();
  DEBUG_exit();
  CFILE_exit();
  WATCH_exit();
  CLASS_exit();
  COMPONENT_exit();
  EXTERN_exit();
  PROJECT_exit();
  LOCAL_exit();
  EVENT_exit();
  FILE_exit();
  STACK_exit();
  ERROR_exit();
  STRING_exit();
	//fclose(log_file);
}

static bool is_option(const char *arg, char option)
{
	return (arg[0] == '-' && arg[1] == option && arg[2] == 0);
}

static bool is_long_option(const char *arg, char option, char *long_option)
{
	if (is_option(arg, option))
		return TRUE;
	else
		return (arg[0] == '-' && arg[1] == '-' && !strcmp(&arg[2], long_option));
}

int main(int argc, char **argv)
{
  //CLASS *class = NULL;
  CLASS_DESC_METHOD *startup = NULL;
  int i, n;
  char *file = NULL;
  bool nopreload = FALSE;

 	//char log_path[256];
 	//sprintf(log_path, "/tmp/gambas-%d.log", getuid());
	//log_file = freopen(log_path, "w+", stderr);
 	//fprintf(stderr, "Fichier log Gambas\n");

  MEMORY_init();
  COMMON_init();
  //STRING_init();

	EXEC_arch = (strcmp(FILE_get_name(argv[0]), "gbr" GAMBAS_VERSION_STRING) == 0);

	if (argc == 2)
	{
		if (is_long_option(argv[1], 'h', "help"))
		{
			if (EXEC_arch)
			{
				printf(
					"Usage: gbr" GAMBAS_VERSION_STRING " [options] <executable file> [<arguments>]\n\n"
					);
			}
			else
			{
				printf(
					"Usage: gbx" GAMBAS_VERSION_STRING " [options] [<project file>] [-- <arguments>]\n"
					"       gbx" GAMBAS_VERSION_STRING " -e <expression>\n\n"
					);
			}
			printf(
				"Options:\n"
				"  -V --version   display version\n"
				"  -h --help      display this help\n"
				"  -L --license   display license\n"
				"  -g             enter debugging mode\n"
	#if DO_PRELOADING          
				"  -p             disable preloading\n"
	#endif
				"  -k             do not unload shared libraries\n"
				);
			if (!EXEC_arch)
			{
				printf("  -e             evaluate an expression\n");
			}

			my_exit(0);
		}
		else if (is_long_option(argv[1], 'V', "version"))
		{
			printf(VERSION "\n");
			my_exit(0);
		}
		else if (is_long_option(argv[1], 'L', "license"))
		{
			printf(
				"Gambas interpreter version " VERSION " " __DATE__ " " __TIME__ "\n"
				COPYRIGHT
				);
			my_exit(0);
		}
	}
	
	if (!EXEC_arch && argc >= 2 && is_option(argv[1], 'e'))
	{
		if (argc < 3)
			fatal("-e option needs an expression.");
		
		TRY
		{
			init(NULL);
			EVAL_string(argv[2]);
		}
		CATCH
		{
			if (ERROR_current->info.code && ERROR_current->info.code != E_ABORT)
				ERROR_print_at(stderr, TRUE, TRUE);
			main_exit(TRUE);
			_exit(1);
		}
		END_TRY
		
		main_exit(FALSE);
		_exit(0);	
	}
	
	for (i = 1; i < argc; i++)
	{
		if (is_option(argv[i], 'g'))
		{
			EXEC_debug = TRUE;
		}
		else if (is_option(argv[i], 'f'))
		{
			EXEC_fifo = TRUE;
			if (i < (argc - 1) && *argv[i + 1] && *argv[i + 1] != '-')
			{
				EXEC_fifo_name = argv[i + 1];
				i++;
			}
		}
		else if (is_option(argv[i], 'p'))
		{
			nopreload = TRUE;
		}
		else if (is_option(argv[i], 'k'))
		{
			EXEC_keep_library = TRUE;
		}
		else if (is_option(argv[i], 'q'))
		{
			_quit_after_main = TRUE;
		}
		else if (is_option(argv[i], '-'))
		{
			i++;
			break;
		}
		else
		{
			if (file)
			{
				fatal("too many %s.", EXEC_arch ? "executable files" : "project directories");
				my_exit(1);
			}
			file = argv[i];
			
			if (EXEC_arch)
			{
				i++;
				break;
			}
		}
	}

	n = i;
	if (!file)
		file = ".";

	if (!nopreload)
		LIBRARY_preload(file, argv);

	if (EXEC_arch)
		argv[0] = file;
	
	for (i = 1; i <= (argc - n); i++)
		argv[i] = argv[i + n - 1];

	argc -= n - 1;
	
  TRY
  {
    init(file);
    
		if (!EXEC_arch)
			argv[0] = PROJECT_name;

    HOOK(main)(&argc, argv);
    EXEC_main_hook_done = TRUE;

		/* Startup class */
    CLASS_load(PROJECT_class);
    startup = (CLASS_DESC_METHOD *)CLASS_get_symbol_desc_kind(PROJECT_class, "main", CD_STATIC_METHOD, 0);
    if (startup == NULL)
      THROW(E_MAIN);

    CAPP_init(); /* needs startup class */
    CFILE_init_watch();

    PROJECT_argc = argc;
    PROJECT_argv = argv;
  }
  CATCH
  {
    if (EXEC_debug)
    {
    	if (!_welcome)
    		DEBUG.Main(TRUE);
      DEBUG.Main(TRUE);
      main_exit(FALSE);
      _exit(0);
		}
		else
		{
	    if (ERROR->info.code && ERROR->info.code != E_ABORT)
    		ERROR_print();
    	main_exit(TRUE);
    	_exit(1);
		}
  }
  END_TRY

  TRY
  {
		EXEC_public_desc(PROJECT_class, NULL, startup, 0);
		EXEC_release_return_value();
		
		if (_quit_after_main)
		{
			main_exit(TRUE);
			_exit(0);
		}
		
		HOOK_DEFAULT(loop, WATCH_loop)();
		EVENT_check_post();
  }
  CATCH
  {
    if (ERROR->info.code && ERROR->info.code != E_ABORT)
    {
			if (EXEC_debug)
			{
				DEBUG.Main(TRUE);
				main_exit(TRUE);
				_exit(0);
			}
			else
			{
				ERROR_print();
				main_exit(TRUE);
				_exit(1);
			}
    }
  }
  END_TRY

  main_exit(FALSE);

  MEMORY_exit();

  fflush(NULL);

  exit(EXEC_return_value);
}