/*

 * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>

 * Copyright (C) 2010  J. Ali Harlow <ali@juiblex.co.uk>

 *

 * 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 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, write to the Free Software Foundation, Inc.,

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

#include "config.h"

#include <stdlib.h>

#include <string.h>

#include <glib-object.h>

#include <gtk/gtk.h>

#include <razor.h>

#include "plover/plover.h"

#include "plover/package.h"

#include "plover-gtk/packagestore.h"

#define VALID_ITER(iter,store) ((iter) && (iter)->user_data && \

	PLOVER_PACKAGE_STORE_GET_PRIVATE(store)->stamp==(iter)->stamp && \

	!g_sequence_iter_is_end((iter)->user_data) && \

	g_sequence_iter_get_sequence((iter)->user_data)== \

	PLOVER_PACKAGE_STORE_GET_PRIVATE(store)->seq)

static GType column_types[PLOVER_PACKAGE_STORE_NO_COLUMNS];

static void plover_package_store_tree_model_init(GtkTreeModelIface *iface);

G_DEFINE_TYPE_WITH_CODE(PloverPackageStore,plover_package_store,G_TYPE_OBJECT,

  G_IMPLEMENT_INTERFACE(GTK_TYPE_TREE_MODEL,

  plover_package_store_tree_model_init));

typedef struct _PloverPackageStorePrivate {

    GSList *sets;

    GSequence *seq;

    int stamp;

} PloverPackageStorePrivate;

#define PLOVER_PACKAGE_STORE_GET_PRIVATE(obj)\

				G_TYPE_INSTANCE_GET_PRIVATE(obj,\

				  PLOVER_TYPE_PACKAGE_STORE,\

				  PloverPackageStorePrivate)

static void plover_package_store_finalize(GObject *obj)

{

    PloverPackageStorePrivate *priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(obj);

    g_sequence_free(priv->seq);

    if (G_OBJECT_CLASS(plover_package_store_parent_class)->finalize)

	G_OBJECT_CLASS(plover_package_store_parent_class)->finalize(obj);

}

static void plover_package_store_dispose(GObject *obj)

{

    PloverPackageStorePrivate *priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(obj);

    g_slist_foreach(priv->sets,(GFunc)g_object_unref,NULL);

    g_slist_free(priv->sets);

    priv->sets=NULL;

    g_sequence_free(priv->seq);

    priv->seq=g_sequence_new(NULL);

    if (G_OBJECT_CLASS(plover_package_store_parent_class)->dispose)

	G_OBJECT_CLASS(plover_package_store_parent_class)->dispose(obj);

}

static void plover_package_store_class_init(PloverPackageStoreClass *klass)

{

    GObjectClass *oclass=G_OBJECT_CLASS(klass);

    oclass->finalize=plover_package_store_finalize;

    oclass->dispose=plover_package_store_dispose;

    g_type_class_add_private(klass,sizeof(PloverPackageStorePrivate));

    column_types[PLOVER_PACKAGE_STORE_OBJ_COLUMN]=PLOVER_TYPE_PACKAGE;

    column_types[PLOVER_PACKAGE_STORE_INSTALLED_COLUMN]=G_TYPE_BOOLEAN;

    column_types[PLOVER_PACKAGE_STORE_ICON_COLUMN]=GDK_TYPE_PIXBUF;

    column_types[PLOVER_PACKAGE_STORE_NAME_COLUMN]=G_TYPE_STRING;

    column_types[PLOVER_PACKAGE_STORE_VERSION_COLUMN]=G_TYPE_STRING;

    column_types[PLOVER_PACKAGE_STORE_SUMMARY_COLUMN]=G_TYPE_STRING;

}

static GtkTreeModelFlags

plover_package_store_get_flags(GtkTreeModel *tree_model)

{

    return GTK_TREE_MODEL_ITERS_PERSIST|GTK_TREE_MODEL_LIST_ONLY;

}

static gint plover_package_store_get_n_columns(GtkTreeModel *tree_model)

{

    return PLOVER_PACKAGE_STORE_NO_COLUMNS;

}

static GType

  plover_package_store_get_column_type(GtkTreeModel *tree_model,gint indx)

{

    g_return_val_if_fail(indx>=0 && indx<PLOVER_PACKAGE_STORE_NO_COLUMNS,

      G_TYPE_INVALID);

    return column_types[indx];

}

static gboolean plover_package_store_get_iter(GtkTreeModel *tree_model,

  GtkTreeIter *iter,GtkTreePath *path)

{

    int i;

    PloverPackageStorePrivate *priv;

    PloverPackageStore *store=(PloverPackageStore *)tree_model;

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(store);

    i=gtk_tree_path_get_indices(path)[0];

    if (i>=g_sequence_get_length(priv->seq))

	return FALSE;

    iter->stamp=priv->stamp;

    iter->user_data=g_sequence_get_iter_at_pos(priv->seq,i);

    return TRUE;

}

static GtkTreePath *

  plover_package_store_get_path(GtkTreeModel *tree_model,GtkTreeIter *iter)

{

    GtkTreePath *path;

    g_return_val_if_fail(VALID_ITER(iter,tree_model),NULL);

    if (g_sequence_iter_is_end(iter->user_data))

	return NULL;

    path=gtk_tree_path_new();

    gtk_tree_path_append_index(path,

      g_sequence_iter_get_position(iter->user_data));

    return path;

}

static void plover_package_store_get_value(GtkTreeModel *tree_model,

  GtkTreeIter *iter,gint column,GValue *value)

{

    gchar *s;

    const char *summary;

    PloverPackageStore *store=(PloverPackageStore *)tree_model;

    PloverPackage *package;

    GInputStream *stream;

    GdkPixbuf *icon;

    g_return_if_fail(column>=0 && column<PLOVER_PACKAGE_STORE_NO_COLUMNS);

    g_return_if_fail(VALID_ITER(iter,store));

    package=PLOVER_PACKAGE(g_sequence_get(iter->user_data));

    g_value_init(value,column_types[column]);

    switch((PloverPackageStoreColumn)column)

    {

	case PLOVER_PACKAGE_STORE_OBJ_COLUMN:

	    g_value_set_object(value,package);

	    break;

	case PLOVER_PACKAGE_STORE_INSTALLED_COLUMN:

	    break;

	case PLOVER_PACKAGE_STORE_ICON_COLUMN:

	    stream=plover_package_read_icon(package,NULL);

	    if (stream)

	    {

		icon=gdk_pixbuf_new_from_stream(stream,NULL,NULL);

		g_object_unref(stream);

	    }

	    else

		icon=NULL;

	    g_value_set_object(value,icon);

	    break;

	case PLOVER_PACKAGE_STORE_NAME_COLUMN:

	    g_value_set_string(value,plover_package_get_name(package));

	    break;

	case PLOVER_PACKAGE_STORE_VERSION_COLUMN:

	    g_value_set_string(value,plover_package_get_version(package));

	    break;

	case PLOVER_PACKAGE_STORE_SUMMARY_COLUMN:

	    summary=plover_package_get_summary(package);

	    if (*summary)

		g_value_set_string(value,summary);

	    else

	    {

		s=g_strconcat("The ",plover_package_get_name(package),

		  " package",NULL);

		g_value_set_string(value,s);

		g_free(s);

	    }

	    break;

	case PLOVER_PACKAGE_STORE_NO_COLUMNS:

	    /* Quieten compiler warning */

	    break;

    }

}

static gboolean

  plover_package_store_iter_next(GtkTreeModel *tree_model,GtkTreeIter *iter)

{

    g_return_val_if_fail(VALID_ITER(iter,tree_model),FALSE);

    iter->user_data=g_sequence_iter_next(iter->user_data);

    return !g_sequence_iter_is_end(iter->user_data);

}

static gboolean plover_package_store_iter_children(GtkTreeModel *tree_model,

  GtkTreeIter *iter,GtkTreeIter *parent)

{

    PloverPackageStorePrivate *priv;

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(tree_model);

    /* this is a list, nodes have no children */

    if (parent)

	return FALSE;

    if (g_sequence_get_length(priv->seq)>0)

    {

	iter->stamp=priv->stamp;

	iter->user_data=g_sequence_get_begin_iter(priv->seq);

	return TRUE;

    }

    else

	return FALSE;

}

static gboolean plover_package_store_iter_has_child(GtkTreeModel *tree_model,

  GtkTreeIter *iter)

{

    return FALSE;

}

static gint plover_package_store_iter_n_children(GtkTreeModel *tree_model,

  GtkTreeIter *iter)

{

    PloverPackageStorePrivate *priv;

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(tree_model);

    if (!iter)

	return g_sequence_get_length(priv->seq);

    g_return_val_if_fail(VALID_ITER(iter,tree_model),-1);

    return 0;

}

static gboolean plover_package_store_iter_nth_child(GtkTreeModel *tree_model,

  GtkTreeIter *iter,GtkTreeIter *parent,gint n)

{

    PloverPackageStorePrivate *priv;

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(tree_model);

    GSequenceIter *child;

    if (parent)

	return FALSE;

    child=g_sequence_get_iter_at_pos(priv->seq,n);

    if (g_sequence_iter_is_end(child))

	return FALSE;

    iter->stamp=priv->stamp;

    iter->user_data=child;

    return TRUE;

}

static gboolean plover_package_store_iter_parent(GtkTreeModel *tree_model,

  GtkTreeIter *iter,GtkTreeIter *child)

{

    return FALSE;

}

static void plover_package_store_tree_model_init(GtkTreeModelIface *iface)

{

    iface->get_flags=plover_package_store_get_flags;

    iface->get_n_columns=plover_package_store_get_n_columns;

    iface->get_column_type=plover_package_store_get_column_type;

    iface->get_iter=plover_package_store_get_iter;

    iface->get_path=plover_package_store_get_path;

    iface->get_value=plover_package_store_get_value;

    iface->iter_next=plover_package_store_iter_next;

    iface->iter_children=plover_package_store_iter_children;

    iface->iter_has_child=plover_package_store_iter_has_child;

    iface->iter_n_children=plover_package_store_iter_n_children;

    iface->iter_nth_child=plover_package_store_iter_nth_child;

    iface->iter_parent=plover_package_store_iter_parent;

}

static void plover_package_store_init(PloverPackageStore *store)

{

    PloverPackageStorePrivate *priv;

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(store);

    priv->seq=g_sequence_new(NULL);

    priv->stamp=g_random_int();

}

PloverPackageStore *plover_package_store_new(void)

{

    return g_object_new(PLOVER_TYPE_PACKAGE_STORE,NULL);

}

GSList *plover_package_store_get_sets(PloverPackageStore *store)

{

    PloverPackageStorePrivate *priv;

    g_return_val_if_fail(PLOVER_IS_PACKAGE_STORE(store),NULL);

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(store);

    return priv->sets;

}

static gint

  plover__package_compar(gconstpointer a,gconstpointer b,gpointer user_data)

{

    PloverPackage *pa=PLOVER_PACKAGE(a);

    PloverPackage *pb=PLOVER_PACKAGE(b);

    return strcmp(plover_package_get_name(pa),plover_package_get_name(pb));

}

void plover_package_store_add_set(PloverPackageStore *store,

  PloverPackageSet *set)

{

    GSList *packages,*link;

    GSequenceIter *si;

    GtkTreeIter ti;

    GtkTreePath *path;

    gint *indices;

    PloverPackageStorePrivate *priv;

    g_return_if_fail(PLOVER_IS_PACKAGE_STORE(store));

    g_return_if_fail(PLOVER_IS_PACKAGE_SET(set));

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(store);

    g_return_if_fail(g_slist_find(priv->sets,set) == NULL);

    g_object_ref(set);

    path=gtk_tree_path_new();

    gtk_tree_path_append_index(path,0);

    indices=gtk_tree_path_get_indices(path);

    packages=plover_package_set_get_packages(set);

    for(link=packages;link;link=link->next)

    {

	si=g_sequence_insert_sorted(priv->seq,link->data,

	  plover__package_compar,NULL);

	*indices=g_sequence_iter_get_position(si);

	ti.stamp=priv->stamp;

	ti.user_data=si;

	gtk_tree_model_row_inserted(GTK_TREE_MODEL(store),path,&ti);

    }

    gtk_tree_path_free(path);

    priv->sets=g_slist_prepend(priv->sets,set);

}

void plover_package_store_remove_set(PloverPackageStore *store,

  PloverPackageSet *set)

{

    GSList *packages,*link;

    GSequence *seq;

    GSequenceIter *iter,*prev,*remove;

    GtkTreePath *path;

    gint *indices;

    PloverPackageStorePrivate *priv;

    g_return_if_fail(PLOVER_IS_PACKAGE_STORE(store));

    g_return_if_fail(PLOVER_IS_PACKAGE_SET(set));

    priv=PLOVER_PACKAGE_STORE_GET_PRIVATE(store);

    g_return_if_fail(g_slist_find(priv->sets,set) != NULL);

    seq=g_sequence_new(NULL);

    path=gtk_tree_path_new();

    gtk_tree_path_append_index(path,0);

    indices=gtk_tree_path_get_indices(path);

    packages=plover_package_set_get_packages(set);

    for(link=packages;link;link=link->next)

	g_sequence_insert_sorted(seq,link->data,plover__package_compar,NULL);

    prev=NULL;

    iter=g_sequence_get_begin_iter(priv->seq);

    remove=g_sequence_get_begin_iter(seq);

    while(!g_sequence_iter_is_end(iter) && !g_sequence_iter_is_end(remove))

    {

	if (g_sequence_get(iter)==g_sequence_get(remove))

	{

	    *indices=g_sequence_iter_get_position(iter);

	    g_sequence_remove(iter);

	    remove=g_sequence_iter_next(remove);

	    gtk_tree_model_row_deleted(GTK_TREE_MODEL(store),path);

	}

	else

	    prev=iter;

	if (prev)

	    iter=g_sequence_iter_next(prev);

	else

	    iter=g_sequence_get_begin_iter(priv->seq);

    }

    gtk_tree_path_free(path);

    g_sequence_free(seq);

    priv->sets=g_slist_remove(priv->sets,set);

    g_object_unref(set);

    priv->stamp++;

}