/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2003-2007 Imendio AB
 * Copyright (C) 2007-2008 Collabora Ltd.
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors: Xavier Claessens <xclaesse@gmail.com>
 *          Jonny Lamb <jonny.lamb@collabora.co.uk>
 */

#include <config.h>

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <glib/gstdio.h>

#include "empathy-log-manager.h"
#include "empathy-log-source-empathy.h"
#include "empathy-utils.h"

#define DEBUG_FLAG EMPATHY_DEBUG_OTHER
#include "empathy-debug.h"

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyLogManager)
typedef struct {
	GList *sources;
} EmpathyLogManagerPriv;

G_DEFINE_TYPE (EmpathyLogManager, empathy_log_manager, G_TYPE_OBJECT);

static EmpathyLogManager * manager_singleton = NULL;

static void
empathy_log_manager_init (EmpathyLogManager *manager)
{
	EmpathyLogManagerPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (manager,
		EMPATHY_TYPE_LOG_MANAGER, EmpathyLogManagerPriv);
	manager->priv = priv;
}

static void
log_manager_finalize (GObject *object)
{
	EmpathyLogManagerPriv *priv;
	GList *l;

	priv = GET_PRIV (object);

	for (l = priv->sources; l; l = l->next) {
		g_slice_free (EmpathyLogSource, l->data);
	}

	g_list_free (priv->sources);
}

static GObject *
log_manager_constructor (GType type,
			 guint n_props,
			 GObjectConstructParam *props)
{
	GObject *retval;

	if (manager_singleton) {
		retval = g_object_ref (manager_singleton);
	} else {
		retval = G_OBJECT_CLASS (empathy_log_manager_parent_class)->constructor
			(type, n_props, props);

		manager_singleton = EMPATHY_LOG_MANAGER (retval);
		g_object_add_weak_pointer (retval, (gpointer) &manager_singleton);
	}

	return retval;
}

static void
empathy_log_manager_class_init (EmpathyLogManagerClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	object_class->finalize = log_manager_finalize;
	object_class->constructor = log_manager_constructor;

	g_type_class_add_private (object_class, sizeof (EmpathyLogManagerPriv));
}

EmpathyLogManager *
empathy_log_manager_dup_singleton (void)
{
	return g_object_new (EMPATHY_TYPE_LOG_MANAGER, NULL);
}

void
empathy_log_manager_add_message (EmpathyLogManager *manager,
				 const gchar       *chat_id,
				 gboolean           chatroom,
				 EmpathyMessage     *message)
{
	EmpathyLogManagerPriv *priv;
	GList *l;

	g_return_if_fail (EMPATHY_IS_LOG_MANAGER (manager));
	g_return_if_fail (chat_id != NULL);
	g_return_if_fail (EMPATHY_IS_MESSAGE (message));

	priv = GET_PRIV (manager);

	for (l = priv->sources; l; l = l->next) {
		EmpathyLogSource *source = (EmpathyLogSource *) l->data;

		if (!source->add_message)
			continue;

		source->add_message (manager, chat_id, chatroom, message);
	}
}

gboolean
empathy_log_manager_exists (EmpathyLogManager *manager,
			    McAccount         *account,
			    const gchar       *chat_id,
			    gboolean           chatroom)
{
	GList *l;
	EmpathyLogManagerPriv *priv;

	g_return_val_if_fail (EMPATHY_IS_LOG_MANAGER (manager), FALSE);
	g_return_val_if_fail (MC_IS_ACCOUNT (account), FALSE);
	g_return_val_if_fail (chat_id != NULL, FALSE);

	priv = GET_PRIV (manager);

	for (l = priv->sources; l; l = l->next) {
		EmpathyLogSource *source = (EmpathyLogSource *) l->data;

		if (!source->exists)
			continue;

		if (source->exists (manager, account, chat_id, chatroom)) {
			return TRUE;
		}
	}

	return FALSE;
}

GList *
empathy_log_manager_get_dates (EmpathyLogManager *manager,
			       McAccount         *account,
			       const gchar       *chat_id,
			       gboolean           chatroom)
{
	GList *l, *out = NULL;
	EmpathyLogManagerPriv *priv;

	g_return_val_if_fail (EMPATHY_IS_LOG_MANAGER (manager), NULL);
	g_return_val_if_fail (MC_IS_ACCOUNT (account), NULL);
	g_return_val_if_fail (chat_id != NULL, NULL);

	priv = GET_PRIV (manager);

	for (l = priv->sources; l; l = l->next) {
		EmpathyLogSource *source = (EmpathyLogSource *) l->data;

		if (!source->get_dates)
			continue;

		if (!out) {
			out = source->get_dates (manager, account, chat_id, chatroom);
		} else {
			/* TODO fix this */
			out = g_list_concat (out, source->get_dates (manager, account, chat_id, chatroom));
		}
	}

	return out;
}

GList *
empathy_log_manager_get_messages_for_date (EmpathyLogManager *manager,
					   McAccount         *account,
					   const gchar       *chat_id,
					   gboolean           chatroom,
					   const gchar       *date)
{
	GList *l, *out = NULL;
	EmpathyLogManagerPriv *priv;

	g_return_val_if_fail (EMPATHY_IS_LOG_MANAGER (manager), NULL);
	g_return_val_if_fail (MC_IS_ACCOUNT (account), NULL);
	g_return_val_if_fail (chat_id != NULL, NULL);

	priv = GET_PRIV (manager);

	for (l = priv->sources; l; l = l->next) {
		EmpathyLogSource *source = (EmpathyLogSource *) l->data;

		if (!source->get_messages_for_date)
			continue;

		if (!out) {
			out = source->get_messages_for_date (manager, account, chat_id, chatroom, date);
		} else {
			out = g_list_concat (out, source->get_messages_for_date (manager, account, chat_id, chatroom, date));
		}
	}

	return out;
}

GList *
empathy_log_manager_get_last_messages (EmpathyLogManager *manager,
				       McAccount         *account,
				       const gchar       *chat_id,
				       gboolean           chatroom)
{
	GList *l, *out = NULL;
	EmpathyLogManagerPriv *priv;

	g_return_val_if_fail (EMPATHY_IS_LOG_MANAGER (manager), NULL);
	g_return_val_if_fail (MC_IS_ACCOUNT (account), NULL);
	g_return_val_if_fail (chat_id != NULL, NULL);

	priv = GET_PRIV (manager);

	for (l = priv->sources; l; l = l->next) {
		EmpathyLogSource *source = (EmpathyLogSource *) l->data;

		if (!source->get_last_messages)
			continue;

		if (!out) {
			out = source->get_last_messages (manager, account, chat_id, chatroom);
		} else {
			out = g_list_concat (out, source->get_last_messages (manager, account, chat_id, chatroom));
		}
	}

	return out;
}

GList *
empathy_log_manager_get_chats (EmpathyLogManager *manager,
			       McAccount         *account)
{
	GList *l, *out = NULL;
	EmpathyLogManagerPriv *priv;

	g_return_val_if_fail (EMPATHY_IS_LOG_MANAGER (manager), NULL);
	g_return_val_if_fail (MC_IS_ACCOUNT (account), NULL);

	priv = GET_PRIV (manager);

	DEBUG ("size of sources is %i", g_list_length (priv->sources));

	for (l = priv->sources; l; l = l->next) {
		EmpathyLogSource *source = (EmpathyLogSource *) l->data;

		if (!source->get_chats)
			continue;

		if (!out) {
			out = source->get_chats (manager, account);
		} else {
			out = g_list_concat (out, source->get_chats (manager, account));
		}
	}

	return out;
}

GList *
empathy_log_manager_search_new (EmpathyLogManager *manager,
				const gchar       *text)
{
	GList *l, *out = NULL;
	EmpathyLogManagerPriv *priv;

	g_return_val_if_fail (EMPATHY_IS_LOG_MANAGER (manager), NULL);
	g_return_val_if_fail (!EMP_STR_EMPTY (text), NULL);

	priv = GET_PRIV (manager);

	for (l = priv->sources; l; l = l->next) {
		EmpathyLogSource *source = (EmpathyLogSource *) l->data;

		if (!source->search_new)
			continue;

		if (!out) {
			out = source->search_new (manager, text);
		} else {
			out = g_list_concat (out, source->search_new (manager, text));
		}
	}

	return out;
}

void
empathy_log_manager_search_hit_free (EmpathyLogSearchHit *hit)
{
	if (hit->account) {
		g_object_unref (hit->account);
	}

	g_free (hit->date);
	g_free (hit->filename);
	g_free (hit->chat_id);

	g_slice_free (EmpathyLogSearchHit, hit);
}

void
empathy_log_manager_search_free (GList *hits)
{
	GList *l;

	for (l = hits; l; l = l->next) {
		empathy_log_manager_search_hit_free (l->data);
	}
	
	g_list_free (hits);
}

/* Format is just date, 20061201. */
gchar *
empathy_log_manager_get_date_readable (const gchar *date)
{
	time_t t;

	t = empathy_time_parse (date);

	return empathy_time_to_string_local (t, "%a %d %b %Y");
}