/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>  
 *
 *
 * Authors:
 *		Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <string.h>
#include <sys/types.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>

#include <libedataserver/e-sexp.h>

#include "e-util/e-error.h"

#include "filter-file.h"

#define d(x)

static gboolean validate (FilterElement *fe);
static int file_eq (FilterElement *fe, FilterElement *cm);
static void xml_create (FilterElement *fe, xmlNodePtr node);
static xmlNodePtr xml_encode (FilterElement *fe);
static int xml_decode (FilterElement *fe, xmlNodePtr node);
static GtkWidget *get_widget (FilterElement *fe);
static void build_code (FilterElement *fe, GString *out, struct _FilterPart *ff);
static void format_sexp (FilterElement *, GString *);

static void filter_file_class_init (FilterFileClass *klass);
static void filter_file_init (FilterFile *ff);
static void filter_file_finalise (GObject *obj);


static FilterElementClass *parent_class = NULL;


GType
filter_file_get_type (void)
{
	static GType type = 0;

	if (!type) {
		static const GTypeInfo info = {
			sizeof (FilterFileClass),
			NULL, /* base_class_init */
			NULL, /* base_class_finalize */
			(GClassInitFunc) filter_file_class_init,
			NULL, /* class_finalize */
			NULL, /* class_data */
			sizeof (FilterFile),
			0,    /* n_preallocs */
			(GInstanceInitFunc) filter_file_init,
		};

		type = g_type_register_static (FILTER_TYPE_ELEMENT, "FilterFile", &info, 0);
	}

	return type;
}

static void
filter_file_class_init (FilterFileClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);
	FilterElementClass *fe_class = FILTER_ELEMENT_CLASS (klass);

	parent_class = g_type_class_ref (FILTER_TYPE_ELEMENT);

	object_class->finalize = filter_file_finalise;

	/* override methods */
	fe_class->validate = validate;
	fe_class->eq = file_eq;
	fe_class->xml_create = xml_create;
	fe_class->xml_encode = xml_encode;
	fe_class->xml_decode = xml_decode;
	fe_class->get_widget = get_widget;
	fe_class->build_code = build_code;
	fe_class->format_sexp = format_sexp;
}

static void
filter_file_init (FilterFile *ff)
{
	;
}

static void
filter_file_finalise (GObject *obj)
{
	FilterFile *ff = (FilterFile *) obj;

	xmlFree (ff->type);
	g_free (ff->path);

        G_OBJECT_CLASS (parent_class)->finalize (obj);
}

/**
 * filter_file_new:
 *
 * Create a new FilterFile object.
 *
 * Return value: A new #FilterFile object.
 **/
FilterFile *
filter_file_new (void)
{
	return (FilterFile *) g_object_new (FILTER_TYPE_FILE, NULL, NULL);
}


FilterFile *
filter_file_new_type_name (const char *type)
{
	FilterFile *file;

	file = filter_file_new ();
	file->type = (char *)xmlStrdup ((xmlChar *)type);

	return file;
}

void
filter_file_set_path (FilterFile *file, const char *path)
{
	g_free (file->path);
	file->path = g_strdup (path);
}

static gboolean
validate (FilterElement *fe)
{
	FilterFile *file = (FilterFile *) fe;

	if (!file->path) {
		/* FIXME: FilterElement should probably have a
                   GtkWidget member pointing to the value gotten with
                   ::get_widget() so that we can get the parent window
                   here. */
		e_error_run(NULL, "filter:no-file", NULL);

		return FALSE;
	}

	/* FIXME: do more to validate command-lines? */

	if (strcmp (file->type, "file") == 0) {
		if (!g_file_test (file->path, G_FILE_TEST_IS_REGULAR)) {
			/* FIXME: FilterElement should probably have a
			   GtkWidget member pointing to the value gotten with
			   ::get_widget() so that we can get the parent window
			   here. */
			e_error_run(NULL, "filter:bad-file", file->path, NULL);

			return FALSE;
		}
	} else if (strcmp (file->type, "command") == 0) {
		/* only requirements so far is that the command can't
		   be an empty string */
		return file->path[0] != '\0';
	}

	return TRUE;
}

static int
file_eq (FilterElement *fe, FilterElement *cm)
{
	FilterFile *ff = (FilterFile *)fe, *cf = (FilterFile *)cm;

        return FILTER_ELEMENT_CLASS (parent_class)->eq (fe, cm)
		&& ((ff->path && cf->path && strcmp (ff->path, cf->path) == 0)
		    || (ff->path == NULL && cf->path == NULL))
		&& ((ff->type && cf->type && strcmp (ff->type, cf->type) == 0)
		    || (ff->type == NULL && cf->type == NULL));
}

static void
xml_create (FilterElement *fe, xmlNodePtr node)
{
	/* parent implementation */
        FILTER_ELEMENT_CLASS (parent_class)->xml_create (fe, node);
}

static xmlNodePtr
xml_encode (FilterElement *fe)
{
	FilterFile *file = (FilterFile *) fe;
	xmlNodePtr cur, value;
	const gchar *type;

	type = file->type ? file->type : "file";

	d(printf ("Encoding %s as xml\n", type));

	value = xmlNewNode (NULL, (const unsigned char *)"value");
	xmlSetProp (value, (const unsigned char *)"name", (unsigned char *)fe->name);
	xmlSetProp (value, (const unsigned char *)"type", (unsigned char *)type);

	cur = xmlNewChild (value, NULL, (unsigned char *)type, NULL);
	xmlNodeSetContent (cur, (unsigned char *)file->path);

	return value;
}

static int
xml_decode (FilterElement *fe, xmlNodePtr node)
{
	FilterFile *file = (FilterFile *)fe;
	char *name, *str, *type;
	xmlNodePtr n;

	name = (char *)xmlGetProp (node, (const unsigned char *)"name");
	type = (char *)xmlGetProp (node, (const unsigned char *)"type");

	d(printf("Decoding %s from xml %p\n", type, fe));
	d(printf ("Name = %s\n", name));

	xmlFree (fe->name);
	fe->name = name;
	xmlFree (file->type);
	file->type = type;

	g_free (file->path);
	file->path = NULL;

	n = node->children;
	while (n != NULL) {
		if (!strcmp ((char *)n->name, type)) {
			str = (char *)xmlNodeGetContent (n);
			file->path = g_strdup (str ? str : "");
			xmlFree (str);

			d(printf ("  '%s'\n", file->path));
			break;
		} else if (n->type == XML_ELEMENT_NODE) {
			g_warning ("Unknown node type '%s' encountered decoding a %s\n", n->name, type);
		}

		n = n->next;
	}

	return 0;
}

static void
filename_changed (GtkWidget *widget, FilterElement *fe)
{
	FilterFile *file = (FilterFile *) fe;
	const char *new;

	new = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (widget));
	g_free (file->path);
	file->path = g_strdup (new);
}

static GtkWidget *
get_widget (FilterElement *fe)
{
	FilterFile *file = (FilterFile *) fe;
	GtkWidget *filewidget;

	filewidget = (GtkWidget *) gtk_file_chooser_button_new (_("Choose a file"), GTK_FILE_CHOOSER_ACTION_OPEN);
	gtk_file_chooser_set_filename (GTK_FILE_CHOOSER (filewidget), file->path);
	g_signal_connect (GTK_FILE_CHOOSER_BUTTON (filewidget), "selection-changed",
			G_CALLBACK (filename_changed), fe);
	return filewidget;
}

static void
build_code (FilterElement *fe, GString *out, struct _FilterPart *ff)
{
	return;
}

static void
format_sexp (FilterElement *fe, GString *out)
{
	FilterFile *file = (FilterFile *) fe;

	e_sexp_encode_string (out, file->path);
}