/*
 * $Id: awk.c 499 2008-12-16 09:42:48Z baconevi $
 */

#include <qse/awk/awk.h>
#include <qse/cmn/sll.h>
#include <qse/cmn/mem.h>
#include <qse/cmn/chr.h>
#include <qse/cmn/opt.h>

#include <qse/utl/stdio.h>
#include <qse/utl/main.h>

#include <string.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>

#define ABORT(label) goto label

#if defined(_WIN32)
	#include <windows.h>
	#include <tchar.h>
	#include <process.h>
	#pragma warning (disable: 4996)
	#pragma warning (disable: 4296)

	#if defined(_MSC_VER) && defined(_DEBUG)
		#define _CRTDBG_MAP_ALLOC
		#include <crtdbg.h>
	#endif
#else
	#include <unistd.h>
#endif

static qse_awk_t* app_awk = NULL;
static qse_awk_run_t* app_run = NULL;
static int app_debug = 0;

static void dprint (const qse_char_t* fmt, ...)
{
	if (app_debug)
	{
		va_list ap;
		va_start (ap, fmt);
		qse_vfprintf (stderr, fmt, ap);
		va_end (ap);
	}
}


#ifdef _WIN32
static BOOL WINAPI stop_run (DWORD ctrl_type)
{
	if (ctrl_type == CTRL_C_EVENT ||
	    ctrl_type == CTRL_CLOSE_EVENT)
	{
		qse_awk_stop (app_run);
		return TRUE;
	}

	return FALSE;
}
#else
static void stop_run (int sig)
{
	signal  (SIGINT, SIG_IGN);
	qse_awk_stop (app_run);
	signal  (SIGINT, stop_run);
}
#endif

static void on_run_start (qse_awk_run_t* run, void* custom)
{
	app_run = run;
	dprint (QSE_T("[AWK ABOUT TO START]\n"));
}

static qse_map_walk_t print_awk_value (
	qse_map_t* map, qse_map_pair_t* pair, void* arg)
{
	qse_awk_run_t* run = (qse_awk_run_t*)arg;
	qse_char_t* str;
	qse_size_t len;

	str = qse_awk_valtostr (run, QSE_MAP_VPTR(pair), 0, QSE_NULL, &len);
	if (str == QSE_NULL)
	{
		dprint (QSE_T("***OUT OF MEMORY***\n"));
	}
	else
	{
		dprint (QSE_T("%.*s = %.*s\n"), 
			(int)QSE_MAP_KLEN(pair), QSE_MAP_KPTR(pair), 
			(int)len, str);
		qse_awk_free (qse_awk_getrunawk(run), str);
	}

	return QSE_MAP_WALK_FORWARD;
}

static void on_run_statement (
	qse_awk_run_t* run, qse_size_t line, void* custom)
{
	/*dprint (L"running %d\n", (int)line);*/
}

static void on_run_return (
	qse_awk_run_t* run, qse_awk_val_t* ret, void* custom)
{
	qse_size_t len;
	qse_char_t* str;

	if (ret == qse_awk_val_nil)
	{
		dprint (QSE_T("[RETURN] - ***nil***\n"));
	}
	else
	{
		str = qse_awk_valtostr (run, ret, 0, QSE_NULL, &len);
		if (str == QSE_NULL)
		{
			dprint (QSE_T("[RETURN] - ***OUT OF MEMORY***\n"));
		}
		else
		{
			dprint (QSE_T("[RETURN] - [%.*s]\n"), (int)len, str);
			qse_awk_free (qse_awk_getrunawk(run), str);
		}
	}

	dprint (QSE_T("[NAMED VARIABLES]\n"));
	qse_map_walk (qse_awk_getrunnvmap(run), print_awk_value, run);
	dprint (QSE_T("[END NAMED VARIABLES]\n"));
}

static void on_run_end (qse_awk_run_t* run, int errnum, void* data)
{
	if (errnum != QSE_AWK_ENOERR)
	{
		dprint (QSE_T("[AWK ENDED WITH AN ERROR]\n"));
		qse_printf (QSE_T("RUN ERROR: CODE [%d] LINE [%u] %s\n"),
			errnum, 
			(unsigned int)qse_awk_getrunerrlin(run),
			qse_awk_getrunerrmsg(run));
	}
	else dprint (QSE_T("[AWK ENDED SUCCESSFULLY]\n"));

	app_run = NULL;
}

/* TODO: remove otab... */
static struct
{
	const qse_char_t* name;
	int opt;
} otab[] =
{
	{ QSE_T("implicit"),    QSE_AWK_IMPLICIT },
	{ QSE_T("explicit"),    QSE_AWK_EXPLICIT },
	{ QSE_T("bxor"),        QSE_AWK_BXOR },
	{ QSE_T("shift"),       QSE_AWK_SHIFT },
	{ QSE_T("idiv"),        QSE_AWK_IDIV },
	{ QSE_T("extio"),       QSE_AWK_EXTIO },
	{ QSE_T("rwpipe"),      QSE_AWK_RWPIPE },
	{ QSE_T("newline"),     QSE_AWK_NEWLINE },
	{ QSE_T("baseone"),     QSE_AWK_BASEONE },
	{ QSE_T("stripspaces"), QSE_AWK_STRIPSPACES },
	{ QSE_T("nextofile"),   QSE_AWK_NEXTOFILE },
	{ QSE_T("crfl"),        QSE_AWK_CRLF },
	{ QSE_T("argstomain"),  QSE_AWK_ARGSTOMAIN },
	{ QSE_T("reset"),       QSE_AWK_RESET },
	{ QSE_T("maptovar"),    QSE_AWK_MAPTOVAR },
	{ QSE_T("pablock"),     QSE_AWK_PABLOCK }
};

static void print_usage (const qse_char_t* argv0)
{
	int j;

	qse_printf (QSE_T("Usage: %s [options] -f sourcefile [ -- ] [datafile]*\n"), argv0);
	qse_printf (QSE_T("       %s [options] [ -- ] sourcestring [datafile]*\n"), argv0);
	qse_printf (QSE_T("Where options are:\n"));
	qse_printf (QSE_T(" -h                                print this message\n"));
	qse_printf (QSE_T(" -d                                show extra information\n"));
	qse_printf (QSE_T(" -f/--file            sourcefile   set the source script file\n"));
	qse_printf (QSE_T(" -o/--deparsed-file   deparsedfile set the deparsing output file\n"));
	qse_printf (QSE_T(" -F/--field-separator string       set a field separator(FS)\n"));

	qse_printf (QSE_T("\nYou may specify the following options to change the behavior of the interpreter.\n"));
	for (j = 0; j < QSE_COUNTOF(otab); j++)
	{
		qse_printf (QSE_T("    -%-20s -no%-20s\n"), otab[j].name, otab[j].name);
	}
}

static int bfn_sleep (
	qse_awk_run_t* run, const qse_char_t* fnm, qse_size_t fnl)
{
	qse_size_t nargs;
	qse_awk_val_t* a0;
	qse_long_t lv;
	qse_real_t rv;
	qse_awk_val_t* r;
	int n;

	nargs = qse_awk_getnargs (run);
	QSE_ASSERT (nargs == 1);

	a0 = qse_awk_getarg (run, 0);

	n = qse_awk_valtonum (run, a0, &lv, &rv);
	if (n == -1) return -1;
	if (n == 1) lv = (qse_long_t)rv;

#ifdef _WIN32
	Sleep ((DWORD)(lv * 1000));
	n = 0;
#else
	n = sleep (lv);	
#endif

	r = qse_awk_makeintval (run, n);
	if (r == QSE_NULL)
	{
		qse_awk_setrunerrnum (run, QSE_AWK_ENOMEM);
		return -1;
	}

	qse_awk_setretval (run, r);
	return 0;
}

static void out_of_memory (void)
{
	qse_fprintf (QSE_STDERR, QSE_T("Error: out of memory\n"));	
}

struct argout_t
{
	void*        isp;  /* input source files or string */
	int          ist;  /* input source type */
	qse_size_t   isfl; /* the number of input source files */
	qse_char_t*  osf;  /* output source file */
	qse_char_t** icf;  /* input console files */
	qse_size_t   icfl; /* the number of input console files */
	qse_map_t*   vm;   /* global variable map */
};

static int handle_args (int argc, qse_char_t* argv[], struct argout_t* ao)
{
	static qse_opt_lng_t lng[] = 
	{
		{ QSE_T("implicit"),         0 },
		{ QSE_T("explicit"),         0 },
		{ QSE_T("bxor"),             0 },
		{ QSE_T("shift"),            0 },
		{ QSE_T("idiv"),             0 },
		{ QSE_T("extio"),            0 },
		{ QSE_T("newline"),          0 },
		{ QSE_T("baseone"),          0 },
		{ QSE_T("stripspaces"),      0 },
		{ QSE_T("nextofile"),        0 },
		{ QSE_T("crlf"),             0 },
		{ QSE_T("argstomain"),       0 },
		{ QSE_T("reset"),            0 },
		{ QSE_T("maptovar"),         0 },
		{ QSE_T("pablock"),          0 },

		{ QSE_T(":main"),            QSE_T('m') },
		{ QSE_T(":file"),            QSE_T('f') },
		{ QSE_T(":field-separator"), QSE_T('F') },
		{ QSE_T(":deparsed-file"),   QSE_T('o') },
		{ QSE_T(":assign"),          QSE_T('v') },

		{ QSE_T("help"),             QSE_T('h') }
	};

	static qse_opt_t opt = 
	{
		QSE_T("hdm:f:F:o:v:"),
		lng
	};

	qse_cint_t c;

	qse_size_t isfc = 16; /* the capacity of isf */
	qse_size_t isfl = 0; /* number of input source files */

	qse_size_t icfc = 0; /* the capacity of icf */
	qse_size_t icfl = 0;  /* the number of input console files */

	qse_char_t** isf = QSE_NULL; /* input source files */
	qse_char_t* osf = QSE_NULL; /* output source file */
	qse_char_t** icf = QSE_NULL; /* input console files */

	qse_map_t* vm = QSE_NULL;  /* global variable map */

	isf = (qse_char_t**) malloc (QSE_SIZEOF(*isf) * isfc);
	if (isf == QSE_NULL)
	{
		out_of_memory ();
		ABORT (oops);
	}

	vm = qse_map_open (QSE_NULL, 0, 30, 70); 
	if (vm == QSE_NULL)
	{
		out_of_memory ();
		ABORT (oops);
	}
	qse_map_setcopier (vm, QSE_MAP_KEY, QSE_MAP_COPIER_INLINE);
	qse_map_setcopier (vm, QSE_MAP_VAL, QSE_MAP_COPIER_INLINE);
	qse_map_setscale (vm, QSE_MAP_KEY, QSE_SIZEOF(qse_char_t));
	qse_map_setscale (vm, QSE_MAP_VAL, QSE_SIZEOF(qse_char_t));

	while ((c = qse_getopt (argc, argv, &opt)) != QSE_CHAR_EOF)
	{
		switch (c)
		{
			case 0:
				qse_printf (QSE_T(">>> [%s] [%s]\n"), opt.lngopt, opt.arg);
				break;

			case QSE_T('h'):
				print_usage (argv[0]);
				if (isf != QSE_NULL) free (isf);
				if (vm != QSE_NULL) qse_map_close (vm);
				return 1;

			case QSE_T('d'):
			{
				app_debug = 1;
				break;
			}

			case QSE_T('f'):
			{
				if (isfl >= isfc-1) /* -1 for last QSE_NULL */
				{
					qse_char_t** tmp;
					tmp = (qse_char_t**) realloc (isf, QSE_SIZEOF(*isf)*(isfc+16));
					if (tmp == QSE_NULL)
					{
						out_of_memory ();
						ABORT (oops);
					}

					isf = tmp;
					isfc = isfc + 16;
				}

				isf[isfl++] = opt.arg;
				break;
			}

			case QSE_T('F'):
			{
				qse_printf  (QSE_T("[field separator] = %s\n"), opt.arg);
				break;
			}

			case QSE_T('o'):
			{
				osf = opt.arg;
				break;
			}

			case QSE_T('v'):
			{
				qse_char_t* eq = qse_strchr(opt.arg, QSE_T('='));
				if (eq == QSE_NULL)
				{
					/* INVALID VALUE... */
					ABORT (oops);
				}

				*eq = QSE_T('\0');

				if (qse_map_upsert (vm, opt.arg, qse_strlen(opt.arg)+1, eq, qse_strlen(eq)+1) == QSE_NULL)
				{
					out_of_memory ();
					ABORT (oops);
				}
				break;
			}

			case QSE_T('?'):
			{
				if (opt.lngopt)
				{
					qse_printf (QSE_T("Error: illegal option - %s\n"), opt.lngopt);
				}
				else
				{
					qse_printf (QSE_T("Error: illegal option - %c\n"), opt.opt);
				}

				ABORT (oops);
			}

			case QSE_T(':'):
			{
				if (opt.lngopt)
				{
					qse_printf (QSE_T("Error: bad argument for %s\n"), opt.lngopt);
				}
				else
				{
					qse_printf (QSE_T("Error: bad argument for %c\n"), opt.opt);
				}

				ABORT (oops);
			}

			default:
				ABORT (oops);
		}
	}

	isf[isfl] = QSE_NULL;

	if (isfl <= 0)
	{
		if (opt.ind >= argc)
		{
			/* no source code specified */
			ABORT (oops);
		}

		/* the source code is the string, not from the file */
		ao->ist = QSE_AWK_PARSE_STRING;
		ao->isp = argv[opt.ind++];

		free (isf);
	}
	else
	{
		ao->ist = QSE_AWK_PARSE_FILES;
		ao->isp = isf;
	}

	/* the remaining arguments are input console file names */
	icfc = (opt.ind >= argc)? 2: (argc - opt.ind + 1);
	icf = (qse_char_t**) malloc (QSE_SIZEOF(*icf)*icfc);
	if (icf == QSE_NULL)
	{
		out_of_memory ();
		ABORT (oops);
	}

	if (opt.ind >= argc)
	{
		/* no input(console) file names are specified.
		 * the standard input becomes the input console */
		icf[icfl++] = QSE_T("");
	}
	else
	{	
		do { icf[icfl++] = argv[opt.ind++]; } while (opt.ind < argc);
	}
	icf[icfl] = QSE_NULL;

	ao->osf = osf;
	ao->icf = icf;
	ao->icfl = icfl;
	ao->vm = vm;

	return 0;

oops:
	if (vm != QSE_NULL) qse_map_close (vm);
	if (icf != QSE_NULL) free (icf);
	if (isf != QSE_NULL) free (isf);
	return -1;
}

static qse_awk_t* open_awk (void)
{
	qse_awk_t* awk;

	awk = qse_awk_opensimple (0);
	if (awk == QSE_NULL)
	{
		qse_printf (QSE_T("ERROR: cannot open awk\n"));
		return QSE_NULL;
	}
	
	/* TODO: get depth from command line */
	qse_awk_setmaxdepth (
		awk, QSE_AWK_DEPTH_BLOCK_PARSE | QSE_AWK_DEPTH_EXPR_PARSE, 50);
	qse_awk_setmaxdepth (
		awk, QSE_AWK_DEPTH_BLOCK_RUN | QSE_AWK_DEPTH_EXPR_RUN, 500);

	/*
	qse_awk_seterrstr (awk, QSE_AWK_EGBLRED, 
		QSE_T("\uC804\uC5ED\uBCC0\uC218 \'%.*s\'\uAC00 \uC7AC\uC815\uC758 \uB418\uC5C8\uC2B5\uB2C8\uB2E4"));
	qse_awk_seterrstr (awk, QSE_AWK_EAFNRED, 
		QSE_T("\uD568\uC218 \'%.*s\'\uAC00 \uC7AC\uC815\uC758 \uB418\uC5C8\uC2B5\uB2C8\uB2E4"));
	*/
	/*qse_awk_setkeyword (awk, QSE_T("func"), 4, QSE_T("FX"), 2);*/

	if (qse_awk_addfunc (awk, 
		QSE_T("sleep"), 5, 0,
		1, 1, QSE_NULL, bfn_sleep) == QSE_NULL)
	{
		qse_awk_close (awk);
		qse_printf (QSE_T("ERROR: cannot add function 'sleep'\n"));
		return QSE_NULL;
	}

	return awk;
}

static int awk_main (int argc, qse_char_t* argv[])
{
	qse_awk_t* awk;

	qse_awk_runcbs_t runcbs;

	int i, file_count = 0;
	const qse_char_t* mfn = QSE_NULL;
	int mode = 0;
	int runarg_count = 0;
	qse_awk_runarg_t runarg[128];
	int deparse = 0;
	struct argout_t ao;
	int ret = 0;

	qse_memset (&ao, 0, QSE_SIZEOF(ao));

	i = handle_args (argc, argv, &ao);
	if (i == -1)
	{
		print_usage (argv[0]);
		return -1;
	}
	if (i == 1) return 0;

	runarg[runarg_count].ptr = NULL;
	runarg[runarg_count].len = 0;

	awk = open_awk ();
	if (awk == QSE_NULL) return -1;

	app_awk = awk;

	if (qse_awk_parsesimple (awk, ao.isp, ao.ist, ao.osf) == -1)
	{
		qse_printf (
			QSE_T("PARSE ERROR: CODE [%d] LINE [%u] %s\n"), 
			qse_awk_geterrnum(awk),
			(unsigned int)qse_awk_geterrlin(awk), 
			qse_awk_geterrmsg(awk)
		);

		ret = -1;
		goto oops;
	}

#ifdef _WIN32
	SetConsoleCtrlHandler (stop_run, TRUE);
#else
	signal (SIGINT, stop_run);
#endif

	runcbs.on_start = on_run_start;
	runcbs.on_statement = on_run_statement;
	runcbs.on_return = on_run_return;
	runcbs.on_end = on_run_end;
	runcbs.data = QSE_NULL;

	if (qse_awk_runsimple (awk, ao.icf, &runcbs) == -1)
	{
		qse_printf (
			QSE_T("RUN ERROR: CODE [%d] LINE [%u] %s\n"),
			qse_awk_geterrnum(awk),
			(unsigned int)qse_awk_geterrlin(awk),
			qse_awk_geterrmsg(awk)
		);

		ret = -1;
		goto oops;
	}

oops:
	qse_awk_close (awk);

	if (ao.ist == QSE_AWK_PARSE_FILES && ao.isp != QSE_NULL) free (ao.isp);
	/*if (ao.osf != QSE_NULL) free (ao.osf);*/
	if (ao.icf != QSE_NULL) free (ao.icf);
	if (ao.vm != QSE_NULL) qse_map_close (ao.vm);

	return ret;
}

int qse_main (int argc, qse_achar_t* argv[])
{
	int n;

#if defined(_WIN32) && defined(_DEBUG) && defined(_MSC_VER)
	_CrtSetDbgFlag (_CRTDBG_LEAK_CHECK_DF | _CRTDBG_ALLOC_MEM_DF);
#endif

	n = qse_runmain (argc, argv, awk_main);

#if defined(_WIN32) && defined(_DEBUG)
	/*#if defined(_MSC_VER)
	_CrtDumpMemoryLeaks ();
	#endif*/
#endif

	return n;
}