/*
 * 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:
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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

#include <libebook/libebook.h>

#include "e-addressbook-model.h"
#include "e-addressbook-table-adapter.h"
#include "eab-book-util.h"
#include "eab-contact-merging.h"
#include "eab-gui-util.h"
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/xmlmemory.h>

#define E_ADDRESSBOOK_TABLE_ADAPTER_GET_PRIVATE(obj) \
	(G_TYPE_INSTANCE_GET_PRIVATE \
	((obj), E_TYPE_ADDRESSBOOK_TABLE_ADAPTER, EAddressbookTableAdapterPrivate))

struct _EAddressbookTableAdapterPrivate {
	EAddressbookModel *model;

	gint create_contact_id, remove_contact_id, modify_contact_id, model_changed_id;

	GHashTable *emails;
};

/* Forward Declarations */
static void	e_addressbook_table_adapter_table_model_init
					(ETableModelInterface *interface);

G_DEFINE_TYPE_WITH_CODE (
	EAddressbookTableAdapter,
	e_addressbook_table_adapter,
	G_TYPE_OBJECT,
	G_IMPLEMENT_INTERFACE (
		E_TYPE_TABLE_MODEL,
		e_addressbook_table_adapter_table_model_init))

static void
unlink_model (EAddressbookTableAdapter *adapter)
{
	EAddressbookTableAdapterPrivate *priv = adapter->priv;

	g_signal_handler_disconnect (priv->model, priv->create_contact_id);
	g_signal_handler_disconnect (priv->model, priv->remove_contact_id);
	g_signal_handler_disconnect (priv->model, priv->modify_contact_id);
	g_signal_handler_disconnect (priv->model, priv->model_changed_id);

	priv->create_contact_id = 0;
	priv->remove_contact_id = 0;
	priv->modify_contact_id = 0;
	priv->model_changed_id = 0;

	g_object_unref (priv->model);

	priv->model = NULL;
}

static void
addressbook_finalize (GObject *object)
{
	EAddressbookTableAdapter *adapter;

	adapter = E_ADDRESSBOOK_TABLE_ADAPTER (object);

	unlink_model (adapter);

	g_hash_table_destroy (adapter->priv->emails);

	/* Chain up to parent's finalize() method. */
	G_OBJECT_CLASS (e_addressbook_table_adapter_parent_class)->finalize (object);
}

/* This function returns the number of columns in our ETableModel. */
static gint
addressbook_col_count (ETableModel *etc)
{
	return E_CONTACT_FIELD_LAST;
}

/* This function returns the number of rows in our ETableModel. */
static gint
addressbook_row_count (ETableModel *etc)
{
	EAddressbookTableAdapter *adapter = E_ADDRESSBOOK_TABLE_ADAPTER (etc);
	EAddressbookTableAdapterPrivate *priv = adapter->priv;

	return e_addressbook_model_contact_count (priv->model);
}

static void
addressbook_append_row (ETableModel *etm,
                        ETableModel *source,
                        gint row)
{
	EAddressbookTableAdapter *adapter = E_ADDRESSBOOK_TABLE_ADAPTER (etm);
	EAddressbookTableAdapterPrivate *priv = adapter->priv;
	EClientCache *client_cache;
	ESourceRegistry *registry;
	EBookClient *book_client;
	EContact *contact;
	gint col;

	contact = e_contact_new ();

	for (col = 1; col < E_CONTACT_LAST_SIMPLE_STRING; col++) {
		gconstpointer val = e_table_model_value_at (source, col, row);
		e_contact_set (contact, col, (gpointer) val);
	}

	client_cache =
		e_addressbook_model_get_client_cache (priv->model);
	book_client = e_addressbook_model_get_client (priv->model);

	registry = e_client_cache_ref_registry (client_cache);

	eab_merging_book_add_contact (
		registry, book_client, contact, NULL, NULL);

	g_object_unref (registry);

	g_object_unref (contact);
}

/* This function returns the value at a particular point in our ETableModel. */
static gpointer
addressbook_value_at (ETableModel *etc,
                      gint col,
                      gint row)
{
	EAddressbookTableAdapter *adapter = E_ADDRESSBOOK_TABLE_ADAPTER (etc);
	EAddressbookTableAdapterPrivate *priv = adapter->priv;
	EContact *contact;
	const gchar *value;

	if (col >= E_CONTACT_FIELD_LAST)
		return NULL;

	if (row >= e_addressbook_model_contact_count (priv->model))
		return NULL;

	contact = e_addressbook_model_contact_at (priv->model, row);
	value = e_contact_get_const (contact, col);

	if (value && *value && (col == E_CONTACT_EMAIL_1 ||
	    col == E_CONTACT_EMAIL_2 || col == E_CONTACT_EMAIL_3)) {
		gchar *val = g_hash_table_lookup (priv->emails, value);

		if (val) {
			/* we have this already cached, so use value from the cache */
			value = val;
		} else {
			gchar *name = NULL, *mail = NULL;

			if (eab_parse_qp_email (value, &name, &mail))
				val = g_strdup_printf ("%s <%s>", name, mail);
			else
				val = g_strdup (value);

			g_free (name);
			g_free (mail);

			g_hash_table_insert (priv->emails, g_strdup (value), val);
			value = val;
		}
	}

	return (gpointer)(value ? value : "");
}

/* This function sets the value at a particular point in our ETableModel. */
static void
contact_modified_cb (EBookClient *book_client,
                     const GError *error,
                     gpointer user_data)
{
	if (error)
		eab_error_dialog (NULL, _("Error modifying card"), error);
}

static void
addressbook_set_value_at (ETableModel *etc,
                          gint col,
                          gint row,
                          gconstpointer val)
{
	EAddressbookTableAdapter *adapter = E_ADDRESSBOOK_TABLE_ADAPTER (etc);
	EAddressbookTableAdapterPrivate *priv = adapter->priv;

	if (e_addressbook_model_get_editable (priv->model)) {
		EClientCache *client_cache;
		ESourceRegistry *registry;
		EBookClient *book_client;
		EContact *contact;

		if (col >= E_CONTACT_FIELD_LAST)
			return;

		if (row >= e_addressbook_model_contact_count (priv->model))
			return;

		contact = e_addressbook_model_get_contact (priv->model, row);
		if (!contact)
			return;

		e_table_model_pre_change (etc);

		if (col == E_CONTACT_EMAIL_1 ||
		    col == E_CONTACT_EMAIL_2 ||
		    col == E_CONTACT_EMAIL_3) {
			const gchar *old_value = e_contact_get_const (contact, col);

			/* remove old value from cache and use new one */
			if (old_value && *old_value)
				g_hash_table_remove (priv->emails, old_value);
		}

		client_cache =
			e_addressbook_model_get_client_cache (priv->model);
		book_client = e_addressbook_model_get_client (priv->model);

		registry = e_client_cache_ref_registry (client_cache);

		e_contact_set (contact, col, (gpointer) val);
		eab_merging_book_modify_contact (
			registry, book_client,
			contact, contact_modified_cb, etc);

		g_object_unref (registry);

		g_object_unref (contact);

		/* XXX Do we need this?  Shouldn't the commit_contact
		 *     generate a changed signal? */
		e_table_model_cell_changed (etc, col, row);
	}
}

/* This function returns whether a particular cell is editable. */
static gboolean
addressbook_is_cell_editable (ETableModel *etc,
                              gint col,
                              gint row)
{
	return FALSE;
}

/* This function duplicates the value passed to it. */
static gpointer
addressbook_duplicate_value (ETableModel *etc,
                             gint col,
                             gconstpointer value)
{
	return g_strdup (value);
}

/* This function frees the value passed to it. */
static void
addressbook_free_value (ETableModel *etc,
                        gint col,
                        gpointer value)
{
	g_free (value);
}

static gpointer
addressbook_initialize_value (ETableModel *etc,
                              gint col)
{
	return g_strdup ("");
}

static gboolean
addressbook_value_is_empty (ETableModel *etc,
                            gint col,
                            gconstpointer value)
{
	return !(value && *(gchar *) value);
}

static gchar *
addressbook_value_to_string (ETableModel *etc,
                             gint col,
                             gconstpointer value)
{
	return g_strdup (value);
}

static void
e_addressbook_table_adapter_class_init (EAddressbookTableAdapterClass *class)
{
	GObjectClass *object_class;

	g_type_class_add_private (
		class, sizeof (EAddressbookTableAdapterPrivate));

	object_class = G_OBJECT_CLASS (class);
	object_class->finalize = addressbook_finalize;
}

static void
e_addressbook_table_adapter_table_model_init (ETableModelInterface *interface)
{
	interface->column_count = addressbook_col_count;
	interface->row_count = addressbook_row_count;
	interface->append_row = addressbook_append_row;

	interface->value_at = addressbook_value_at;
	interface->set_value_at = addressbook_set_value_at;
	interface->is_cell_editable = addressbook_is_cell_editable;

	interface->duplicate_value = addressbook_duplicate_value;
	interface->free_value = addressbook_free_value;
	interface->initialize_value = addressbook_initialize_value;
	interface->value_is_empty = addressbook_value_is_empty;
	interface->value_to_string = addressbook_value_to_string;
}

static void
e_addressbook_table_adapter_init (EAddressbookTableAdapter *adapter)
{
	adapter->priv = E_ADDRESSBOOK_TABLE_ADAPTER_GET_PRIVATE (adapter);
}

static void
create_contact (EAddressbookModel *model,
                gint index,
                gint count,
                EAddressbookTableAdapter *adapter)
{
	e_table_model_pre_change (E_TABLE_MODEL (adapter));
	e_table_model_rows_inserted (E_TABLE_MODEL (adapter), index, count);
}

static void
remove_contacts (EAddressbookModel *model,
                gpointer data,
                EAddressbookTableAdapter *adapter)
{
	GArray *indices = (GArray *) data;
	gint count = indices->len;

	/* clear whole cache */
	g_hash_table_remove_all (adapter->priv->emails);

	e_table_model_pre_change (E_TABLE_MODEL (adapter));
	if (count == 1)
		e_table_model_rows_deleted (
			E_TABLE_MODEL (adapter),
			g_array_index (indices, gint, 0), 1);
	else
		e_table_model_changed (E_TABLE_MODEL (adapter));
}

static void
modify_contact (EAddressbookModel *model,
                gint index,
                EAddressbookTableAdapter *adapter)
{
	/* clear whole cache */
	g_hash_table_remove_all (adapter->priv->emails);

	e_table_model_pre_change (E_TABLE_MODEL (adapter));
	e_table_model_row_changed (E_TABLE_MODEL (adapter), index);
}

static void
model_changed (EAddressbookModel *model,
               EAddressbookTableAdapter *adapter)
{
	/* clear whole cache */
	g_hash_table_remove_all (adapter->priv->emails);

	e_table_model_pre_change (E_TABLE_MODEL (adapter));
	e_table_model_changed (E_TABLE_MODEL (adapter));
}

void
e_addressbook_table_adapter_construct (EAddressbookTableAdapter *adapter,
                                       EAddressbookModel *model)
{
	EAddressbookTableAdapterPrivate *priv = adapter->priv;

	priv->model = model;
	g_object_ref (priv->model);

	priv->create_contact_id = g_signal_connect (
		priv->model, "contact_added",
		G_CALLBACK (create_contact), adapter);

	priv->remove_contact_id = g_signal_connect (
		priv->model, "contacts_removed",
		G_CALLBACK (remove_contacts), adapter);

	priv->modify_contact_id = g_signal_connect (
		priv->model, "contact_changed",
		G_CALLBACK (modify_contact), adapter);

	priv->model_changed_id = g_signal_connect (
		priv->model, "model_changed",
		G_CALLBACK (model_changed), adapter);

	priv->emails = g_hash_table_new_full (
		g_str_hash, g_str_equal,
		(GDestroyNotify) g_free,
		(GDestroyNotify) g_free);
}

ETableModel *
e_addressbook_table_adapter_new (EAddressbookModel *model)
{
	EAddressbookTableAdapter *et;

	et = g_object_new (E_TYPE_ADDRESSBOOK_TABLE_ADAPTER, NULL);

	e_addressbook_table_adapter_construct (et, model);

	return E_TABLE_MODEL (et);
}