/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Copyright (C) 2007 Andreas Obergrusberger <tradiaz@yahoo.de>
 * Copyright (C) 2008-2010 Valeriy Lyasotskiy <onestep@ukr.net>
 * Copyright (C) 2010-2011 Jonathan Conder <jonno.conder@gmail.com>
 *
 * Licensed under the GNU General Public License Version 2
 *
 * 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 <alpm.h>
#include <pk-backend.h>

#include "pk-backend-alpm.h"
#include "pk-alpm-databases.h"
#include "pk-alpm-error.h"
#include "pk-alpm-transaction.h"

static gint
pk_alpm_install_add_file (PkBackendJob *job, const gchar *filename)
{
	PkBackend *backend = pk_backend_job_get_backend (job);
	PkBackendAlpmPrivate *priv = pk_backend_get_user_data (backend);
	alpm_pkg_t *pkg;
	alpm_siglevel_t level;

	g_return_val_if_fail (filename != NULL, -1);

	level = alpm_option_get_local_file_siglevel (priv->alpm);

	if (alpm_pkg_load (priv->alpm, filename, 1, level, &pkg) < 0)
		return -1;

	if (alpm_add_pkg (priv->alpm, pkg) < 0) {
		alpm_pkg_free (pkg);
		return -1;
	}

	return 0;
}

static gboolean
pk_alpm_transaction_add_targets (PkBackendJob *job, gchar** paths, GError **error)
{
	PkBackend *backend = pk_backend_job_get_backend (job);
	PkBackendAlpmPrivate *priv = pk_backend_get_user_data (backend);

	g_return_val_if_fail (paths != NULL, FALSE);

	for (; *paths != NULL; ++paths) {
		if (pk_alpm_install_add_file (job, *paths) < 0) {
			alpm_errno_t errno = alpm_errno (priv->alpm);
			g_set_error (error, PK_ALPM_ERROR, errno, "%s: %s",
				     *paths, alpm_strerror (errno));
			return FALSE;
		}
	}

	return TRUE;
}

static void
pk_backend_install_files_thread (PkBackendJob *job, GVariant* params, gpointer p)
{
	PkBackend *backend = pk_backend_job_get_backend (job);
	gboolean only_trusted;
	gchar** full_paths;
	PkBitfield flags;
	g_autoptr(GError) error = NULL;

	g_variant_get (params, "(t^a&s)",
				  &flags,
				  &full_paths);
	only_trusted = flags & PK_TRANSACTION_FLAG_ENUM_ONLY_TRUSTED;

	if (!only_trusted && !pk_alpm_disable_signatures (backend, &error))
		goto out;

	if (pk_alpm_transaction_initialize (job, 0, 0, &error) &&
	    pk_alpm_transaction_add_targets (job, full_paths, &error) &&
	    pk_alpm_transaction_simulate (job, &error)) {
		if (pk_bitfield_contain (flags, PK_TRANSACTION_FLAG_ENUM_SIMULATE)) { /* simulation */
			pk_alpm_transaction_packages (job);
		}
		else {
			pk_alpm_transaction_commit (job, &error);
		}
	}
out:
	pk_alpm_transaction_end (job, (error == NULL) ? &error : NULL);

	if (!only_trusted) {
		GError **e = (error == NULL) ? &error : NULL;
		pk_alpm_enable_signatures (backend, e);
	}

	pk_alpm_finish (job, error);
}

void
pk_backend_install_files (PkBackend *self,
			  PkBackendJob *job,
			  PkBitfield transaction_flags,
			  gchar      **full_paths)
{
	g_return_if_fail (full_paths != NULL);

	pk_alpm_run (job, PK_STATUS_ENUM_SETUP, pk_backend_install_files_thread, NULL);
}
