/* Copyright 2009 Myhailo Danylenko

 *

 * This file is part of mcabber-templatecmd

 *

 * mcabber-templatecmd 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, see <http://www.gnu.org/licenses/>. */

#include <glib.h>

#include <stdlib.h>

#include <string.h>

#include <mcabber/compl.h>

#include <mcabber/commands.h>

#include <mcabber/utils.h>

#include <mcabber/logprint.h>

#include <mcabber/modules.h>

#include "config.h"

static void tcmd_init (void);

static void tcmd_uninit (void);

#define DESCRIPTION ( "Templated commands\nProvides command /templatecmd (and any commands, you define with it)" )

static module_info_t info_templatecmd_experimental = {

	.branch      = "experimental",

	.api         = 10,

	.version     = PROJECT_VERSION,

	.description = DESCRIPTION,

	.requires    = NULL,

	.init        = tcmd_init,

	.uninit      = tcmd_uninit,

	.next        = NULL,

};

module_info_t info_templatecmd = {

	.branch      = "dev",

	.api         = 11,

	.version     = PROJECT_VERSION,

	.description = DESCRIPTION,

	.requires    = NULL,

	.init        = tcmd_init,

	.uninit      = tcmd_uninit,

	.next        = &info_templatecmd_experimental,

};

typedef struct {

	gchar    *name;

	gchar    *template;

	int       maxarg;

	gboolean  stararg;

} tcmd_t;

static GSList *template_commands = NULL;

static void tcmd_callback (char *arg, gpointer udata)

{

	tcmd_t   *tcmd     = (tcmd_t *) udata;

	char    **args     = NULL;

	GString  *command  = g_string_new (NULL);

	char     *template = tcmd -> template;

	char     *p;

	if (tcmd -> maxarg > 0)

		args = split_arg (arg, tcmd -> maxarg, TRUE);

	for (p = template; *p; ++p) {

		if (*p != '$' || !*(p + 1) || !strchr ("*$0123456789", *(p + 1))) {

			g_string_append_c (command, *p);

			continue;

		}

		++p;

		if (*p == '*')

			g_string_append (command, arg);

		else if (*p == '$')

			g_string_append_c (command, '$');

		else {

			int argnum = atoi (p);

			if (argnum == 0)

				g_string_append (command, tcmd -> name);

			else if (args[argnum - 1])

				g_string_append (command, args[argnum - 1]);

			while (*(p + 1) && strchr ("0123456789", *(p + 1)))

				++p;

		}

	}

	{

		char *cmd = g_string_free (command, FALSE);

		process_command (cmd, 1);

		g_free (cmd);

	}

	if (args)

		free_arg_lst (args);

}

static void do_templatecmd (char *arg)

{

	if (!*arg) { // list tcmds

		GSList *tel;

		for (tel = template_commands; tel; tel = tel -> next) {

			tcmd_t *tcmd = (tcmd_t *) tel -> data;

			scr_log_print (LPRINT_NORMAL, "Templatecmd %s = %s", tcmd -> name, tcmd -> template);

		}

	} else {

		char *nend = strchr (arg, '=');

		if (!nend) { // show tcmd

			GSList *tel;

			for (tel = template_commands; tel; tel = tel -> next) {

				tcmd_t *tcmd = (tcmd_t *) tel -> data;

				if (!strcmp (arg, tcmd -> name)) {

					scr_log_print (LPRINT_NORMAL, "Templatecmd %s = %s", tcmd -> name, tcmd -> template);

					return;

				}

			}

			scr_log_print (LPRINT_NORMAL, "No template with such name.");

		} else if (nend == arg) // error

			scr_log_print (LPRINT_NORMAL, "You must specify command name.");

		else { // new/modify tcmd

			GSList *tel;

			tcmd_t *template_command = NULL;

			char   *astart           = nend + 1;

			int     len;

			for (--nend; nend > arg && *nend == ' '; --nend);

			len = nend + 1 - arg;

			for (tel = template_commands; tel; tel = tel -> next) {

				tcmd_t *tcmd = (tcmd_t *) tel -> data;

				if (!strncmp (arg, tcmd -> name, len)) {

					template_command = tcmd;

					break;

				}

			}

			for (;*astart && *astart == ' '; ++astart);

			if (!*astart) { // delete tcmd

				if (template_command) {

					cmd_del (template_command -> name);

					template_commands = g_slist_remove (template_commands, template_command);

					g_free (template_command -> name);

					g_free (template_command -> template);

					g_free (template_command);

				}

				return;

			}

			if (!template_command) {

				template_command = g_new (tcmd_t, 1);

				template_command -> name = g_strndup (arg, len);

			} else

				g_free (template_command -> template);

			template_command -> template = g_strdup (astart);

			{

				int      maxarg  = -1;

				gboolean stararg = FALSE;

				for (astart = strchr (astart, '$'); astart; astart = strchr (astart, '$')) {

					++astart;

					if (!*astart)

						break;

					if (strchr ("0123456789", *astart)) {

						int anum = atoi (astart);

						if (maxarg < anum)

							maxarg = anum;

					} else if (*astart == '*')

						stararg = TRUE;

				}

				template_command -> maxarg  = maxarg;

				template_command -> stararg = stararg;

			}

			template_commands = g_slist_append (template_commands, template_command);

			cmd_add (template_command -> name, "", 0, 0, (void (*) (char *arg)) tcmd_callback, template_command);

		}

	}

}

static void tcmd_init (void)

{

	cmd_add ("templatecmd", "", COMPL_CMD, COMPL_CMD, do_templatecmd, NULL);

}

static void tcmd_uninit (void)

{

	GSList *tel;

	cmd_del ("templatecmd");

	for (tel = template_commands; tel; tel = tel -> next) {

		tcmd_t *template_command = (tcmd_t *) tel -> data;

		cmd_del (template_command -> name);

		g_free (template_command -> name);

		g_free (template_command -> template);

		g_free (template_command);

	}

	g_slist_free (template_commands);

}

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