/*
** Copyright (C) 2011 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
**
** 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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**
*/

#include "mu-msg-attach-view.h"
#include "mu-widget-util.h"
#include <mu-msg-part.h>

enum {
	ICON_COL,
	NAME_COL,
	PARTNUM_COL,
	
	NUM_COL
};


/* 'private'/'protected' functions */
static void mu_msg_attach_view_class_init (MuMsgAttachViewClass *klass);
static void mu_msg_attach_view_init       (MuMsgAttachView *obj);
static void mu_msg_attach_view_finalize   (GObject *obj);

/* list my signals  */
enum {
	ATTACH_ACTIVATED,
	/* MY_SIGNAL_2, */
	LAST_SIGNAL
};

struct _MuMsgAttachViewPrivate {
	MuMsg *_msg;
};
#define MU_MSG_ATTACH_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
                                                MU_TYPE_MSG_ATTACH_VIEW, \
                                                MuMsgAttachViewPrivate))
/* globals */
static GtkIconViewClass *parent_class = NULL;

static guint signals[LAST_SIGNAL] = {0};

G_DEFINE_TYPE (MuMsgAttachView, mu_msg_attach_view, GTK_TYPE_ICON_VIEW);

static void
mu_msg_attach_view_class_init (MuMsgAttachViewClass *klass)
{
	GObjectClass *gobject_class;
	gobject_class = (GObjectClass*) klass;

	parent_class            = g_type_class_peek_parent (klass);
	gobject_class->finalize = mu_msg_attach_view_finalize;

	g_type_class_add_private (gobject_class, sizeof(MuMsgAttachViewPrivate));
	
	signals[ATTACH_ACTIVATED] =
		g_signal_new ("attach-activated",
			      G_TYPE_FROM_CLASS (gobject_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (MuMsgAttachViewClass,
					       attach_activated),
			      NULL, NULL,
			      g_cclosure_marshal_VOID__UINT_POINTER,
			      G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_POINTER);
}

static void
item_activated (MuMsgAttachView *self, GtkTreePath *tpath)
{
	GtkTreeModel *model;
	GtkTreeIter iter;
	guint partnum;
	
	model = gtk_icon_view_get_model (GTK_ICON_VIEW(self));
	if (!gtk_tree_model_get_iter (model, &iter, tpath)) {
		g_warning ("could not find path");
	}
	
	gtk_tree_model_get (model, &iter,
			    PARTNUM_COL, &partnum,
			    -1);
	
	g_signal_emit (G_OBJECT (self),
		       signals[ATTACH_ACTIVATED], 0,
		       partnum, self->_priv->_msg);
}


static void
mu_msg_attach_view_init (MuMsgAttachView *obj)
{
	GtkListStore *store;
 
	obj->_priv = MU_MSG_ATTACH_VIEW_GET_PRIVATE(obj);
	obj->_priv->_msg = NULL;
	
	store = gtk_list_store_new (NUM_COL,GDK_TYPE_PIXBUF,
				    G_TYPE_STRING, G_TYPE_UINT);
	gtk_icon_view_set_model (GTK_ICON_VIEW(obj), GTK_TREE_MODEL(store));
	g_object_unref (store);
	
	gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW(obj), ICON_COL);
	gtk_icon_view_set_text_column (GTK_ICON_VIEW(obj), NAME_COL);

	gtk_icon_view_set_margin (GTK_ICON_VIEW(obj), 0);
	gtk_icon_view_set_spacing (GTK_ICON_VIEW(obj), 0);
	gtk_icon_view_set_item_padding (GTK_ICON_VIEW(obj), 0);
	gtk_icon_view_set_item_orientation (GTK_ICON_VIEW(obj),
					    GTK_ORIENTATION_HORIZONTAL);
	
	g_signal_connect (G_OBJECT(obj), "item-activated",
			  G_CALLBACK(item_activated), NULL);
}	


static void
mu_msg_attach_view_finalize (GObject *obj)
{
	MuMsg *msg;

	msg = MU_MSG_ATTACH_VIEW(obj)->_priv->_msg;
	if (msg)
		mu_msg_unref (msg);
	
	G_OBJECT_CLASS(parent_class)->finalize (obj);
}

GtkWidget*
mu_msg_attach_view_new (void)
{
	return GTK_WIDGET(g_object_new(MU_TYPE_MSG_ATTACH_VIEW, NULL));
}

struct _CBData {
	GtkListStore *store;
	guint count;
};
typedef struct _CBData CBData;



static void
each_part (MuMsg *msg, MuMsgPart *part, CBData *cbdata)
{
	GtkTreeIter treeiter;
	GdkPixbuf *pixbuf;
	char ctype[128];
	
	/* not a real attachment */
	if (!mu_msg_part_file_name(part))
		return;

	if (!part->type || !part->subtype)
		snprintf (ctype, sizeof(ctype), "%s", "application/octet-stream");
	else
		snprintf (ctype, sizeof(ctype), "%s/%s", part->type, part->subtype);

	pixbuf = mu_widget_util_get_icon_pixbuf_for_content_type (ctype, 16);
	if (!pixbuf) {
		g_warning ("%s: could not get icon pixbuf for '%s'",
			   __FUNCTION__, ctype);
		pixbuf = mu_widget_util_get_icon_pixbuf_for_content_type
			("application/octet-stream", 16);
	}
	
	gtk_list_store_append (cbdata->store, &treeiter);
	gtk_list_store_set (cbdata->store, &treeiter,
			    NAME_COL, mu_msg_part_file_name (part),
			    ICON_COL, pixbuf,
			    PARTNUM_COL, part->index,
			    -1);
	if (pixbuf)
		g_object_unref (pixbuf);
	
	++cbdata->count;
}

gint
mu_msg_attach_view_set_message (MuMsgAttachView *self, MuMsg *msg)
{
	GtkListStore *store;
	CBData cbdata;
	
	g_return_val_if_fail (MU_IS_MSG_ATTACH_VIEW(self), -1);
	
	store = GTK_LIST_STORE (gtk_icon_view_get_model (GTK_ICON_VIEW(self)));
	gtk_list_store_clear (store);

	if (self->_priv->_msg)
		mu_msg_unref (self->_priv->_msg);
	
	if (!msg)
		return 0;

	
	self->_priv->_msg = mu_msg_ref (msg);
	
	cbdata.store = store;
	cbdata.count = 0;
	mu_msg_part_foreach (msg, (MuMsgPartForeachFunc)each_part, &cbdata);
	
	return cbdata.count;
}