/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Copyright (C) 2009 Mounir Lamouri (volkmar) <mounir.lamouri@gmail.com>
 * Copyright (C) 2010-2013 Fabio Erculiani (lxnay) <lxnay@gentoo.org>
 *
 * 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 <pk-backend.h>
#include <pk-backend-spawn.h>

static PkBackendSpawn *spawn = 0;
static const gchar* BACKEND_FILE = "portageBackend.py";

/**
 * pk_backend_start_job:
 */
void
pk_backend_start_job (PkBackend *backend, PkBackendJob *job)
{
	if (pk_backend_spawn_is_busy (spawn)) {
		pk_backend_job_error_code (job,
					   PK_ERROR_ENUM_LOCK_REQUIRED,
					   "spawned backend requires lock");
		return;
	}
}

/**
 * pk_backend_initialize:
 * This should only be run once per backend load, i.e. not every transaction
 */
void
pk_backend_initialize (GKeyFile *conf, PkBackend *backend)
{
	g_debug ("backend: initialize");

	spawn = pk_backend_spawn_new (conf);
	pk_backend_spawn_set_name (spawn, "portage");
	/* allowing sigkill as long as no one complain */
	pk_backend_spawn_set_allow_sigkill (spawn, TRUE);
}

/**
 * pk_backend_destroy:
 * This should only be run once per backend load, i.e. not every transaction
 */
void
pk_backend_destroy (PkBackend *backend)
{
	g_debug ("backend: destroy");
	g_object_unref (spawn);
}

/**
 * pk_backend_get_groups:
 */
PkBitfield
pk_backend_get_groups (PkBackend *backend)
{
	return pk_bitfield_from_enums (
			PK_GROUP_ENUM_ACCESSIBILITY,
			PK_GROUP_ENUM_ACCESSORIES,
			PK_GROUP_ENUM_ADMIN_TOOLS,
			PK_GROUP_ENUM_COMMUNICATION,
			PK_GROUP_ENUM_DESKTOP_GNOME,
			PK_GROUP_ENUM_DESKTOP_KDE,
			PK_GROUP_ENUM_DESKTOP_OTHER,
			PK_GROUP_ENUM_DESKTOP_XFCE,
			//PK_GROUP_ENUM_EDUCATION,
			PK_GROUP_ENUM_FONTS,
			PK_GROUP_ENUM_GAMES,
			PK_GROUP_ENUM_GRAPHICS,
			PK_GROUP_ENUM_INTERNET,
			PK_GROUP_ENUM_LEGACY,
			PK_GROUP_ENUM_LOCALIZATION,
			//PK_GROUP_ENUM_MAPS,
			PK_GROUP_ENUM_MULTIMEDIA,
			PK_GROUP_ENUM_NETWORK,
			PK_GROUP_ENUM_OFFICE,
			PK_GROUP_ENUM_OTHER,
			PK_GROUP_ENUM_POWER_MANAGEMENT,
			PK_GROUP_ENUM_PROGRAMMING,
			//PK_GROUP_ENUM_PUBLISHING,
			PK_GROUP_ENUM_REPOS,
			PK_GROUP_ENUM_SECURITY,
			PK_GROUP_ENUM_SERVERS,
			PK_GROUP_ENUM_SYSTEM,
			PK_GROUP_ENUM_VIRTUALIZATION,
			PK_GROUP_ENUM_SCIENCE,
			PK_GROUP_ENUM_DOCUMENTATION,
			//PK_GROUP_ENUM_ELECTRONICS,
			//PK_GROUP_ENUM_COLLECTIONS,
			//PK_GROUP_ENUM_VENDOR,
			//PK_GROUP_ENUM_NEWEST,
			//PK_GROUP_ENUM_UNKNOWN,
			-1);
}

/**
 * pk_backend_get_filters:
 */
PkBitfield
pk_backend_get_filters (PkBackend *backend)
{
	return pk_bitfield_from_enums (
			PK_FILTER_ENUM_INSTALLED,
			PK_FILTER_ENUM_FREE,
			PK_FILTER_ENUM_NEWEST,
			-1);
	/*
	 * These filters are candidate for further add:
	 * PK_FILTER_ENUM_GUI	(need new PROPERTIES entry)
	 * PK_FILTER_ENUM_ARCH (need some work, see ML)
	 * PK_FILTER_ENUM_SOURCE (need some work/support, see ML)
	 * PK_FILTER_ENUM_COLLECTIONS (need new PROPERTIES entry)
	 * PK_FILTER_ENUM_APPLICATION (need new PROPERTIES entry)
	 */
}

/**
 * pk_backend_get_roles:
 */
PkBitfield
pk_backend_get_roles (PkBackend *backend)
{
    PkBitfield roles;
    roles = pk_bitfield_from_enums (
	PK_ROLE_ENUM_CANCEL,
	PK_ROLE_ENUM_DEPENDS_ON,
	PK_ROLE_ENUM_GET_DETAILS,
	PK_ROLE_ENUM_GET_FILES,
	PK_ROLE_ENUM_REQUIRED_BY,
	PK_ROLE_ENUM_GET_PACKAGES,
	//PK_ROLE_ENUM_WHAT_PROVIDES,
	PK_ROLE_ENUM_GET_UPDATES,
	PK_ROLE_ENUM_GET_UPDATE_DETAIL,
	PK_ROLE_ENUM_INSTALL_PACKAGES,
	//PK_ROLE_ENUM_INSTALL_FILES,
	//PK_ROLE_ENUM_INSTALL_SIGNATURE,
	PK_ROLE_ENUM_REFRESH_CACHE,
	PK_ROLE_ENUM_REMOVE_PACKAGES,
	//PK_ROLE_ENUM_DOWNLOAD_PACKAGES,
	PK_ROLE_ENUM_RESOLVE,
	PK_ROLE_ENUM_SEARCH_DETAILS,
	PK_ROLE_ENUM_SEARCH_FILE,
	PK_ROLE_ENUM_SEARCH_GROUP,
	PK_ROLE_ENUM_SEARCH_NAME,
	PK_ROLE_ENUM_UPDATE_PACKAGES,
	PK_ROLE_ENUM_GET_REPO_LIST,
	PK_ROLE_ENUM_REPO_ENABLE,
	//PK_ROLE_ENUM_REPO_SET_DATA,
	PK_ROLE_ENUM_GET_CATEGORIES,
	-1);

    return roles;
}

/**
 * pk_backend_cancel:
 */
void
pk_backend_cancel (PkBackend *backend, PkBackendJob *job)
{
	/* this feels bad... */
	pk_backend_spawn_kill (spawn);
}

/**
 * pk_backend_get_categories:
 */
void
pk_backend_get_categories (PkBackend *backend, PkBackendJob *job)
{
    pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "get-categories", NULL);
}

/**
 * pk_backend_depends_on:
 */
void
pk_backend_depends_on (PkBackend *backend, PkBackendJob *job, PkBitfield filters, gchar **package_ids, gboolean recursive)
{
	gchar *filters_text;
	gchar *package_ids_temp;

	package_ids_temp = pk_package_ids_to_string (package_ids);
	filters_text = pk_filter_bitfield_to_string (filters);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "depends-on", filters_text, package_ids_temp, pk_backend_bool_to_string (recursive), NULL);
	g_free (package_ids_temp);
	g_free (filters_text);
}

/**
 * pk_backend_get_details:
 */
void
pk_backend_get_details (PkBackend *backend, PkBackendJob *job, gchar **package_ids)
{
	gchar *package_ids_temp;

	package_ids_temp = pk_package_ids_to_string (package_ids);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "get-details", package_ids_temp, NULL);
	g_free (package_ids_temp);
}

/**
 * pk_backend_get_files:
 */
void
pk_backend_get_files (PkBackend *backend, PkBackendJob *job, gchar **package_ids)
{
	gchar *package_ids_temp;

	package_ids_temp = pk_package_ids_to_string (package_ids);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "get-files", package_ids_temp, NULL);
	g_free (package_ids_temp);
}

/**
 * pk_backend_get_update_detail:
 */
void
pk_backend_get_update_detail (PkBackend *backend, PkBackendJob *job, gchar **package_ids)
{
	gchar *package_ids_temp;

	package_ids_temp = pk_package_ids_to_string (package_ids);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "get-update-detail", package_ids_temp, NULL);
	g_free (package_ids_temp);
}

/**
 * pk_backend_get_updates:
 */
void
pk_backend_get_updates (PkBackend *backend, PkBackendJob *job, PkBitfield filters)
{
	gchar *filters_text;

	filters_text = pk_filter_bitfield_to_string (filters);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "get-updates", filters_text, NULL);
	g_free (filters_text);
}

/**
 * pk_backend_install_packages:
 */
void
pk_backend_install_packages (PkBackend *backend, PkBackendJob *job, PkBitfield transaction_flags, gchar **package_ids)
{
	gchar *package_ids_temp;
	gchar *transaction_flags_temp;

	/*
	 * TODO: portage manage to install when offline
	 * but maybe packagekit implementation will make this forbidden
	 * (because of download funcion dir)
	 * If needed, add something that will check for network _NOW_ (see yum)
	 */

	/* send the complete list as stdin */
	package_ids_temp = pk_package_ids_to_string (package_ids);
	transaction_flags_temp = pk_transaction_flag_bitfield_to_string (transaction_flags);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "install-packages", transaction_flags_temp, package_ids_temp, NULL);
	g_free(transaction_flags_temp);
	g_free (package_ids_temp);
}

/**
 * pk_backend_refresh_cache:
 */
void
pk_backend_refresh_cache (PkBackend *backend, PkBackendJob *job, gboolean force)
{ 
	/* check network state */
	if (!pk_backend_is_online (backend)) {
		pk_backend_job_error_code (job, PK_ERROR_ENUM_NO_NETWORK, "Cannot refresh cache whilst offline");
		pk_backend_job_finished (job);
		return;
	}

	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "refresh-cache", pk_backend_bool_to_string (force), NULL);
}

/**
 * pk_backend_remove_packages:
 */
void
pk_backend_remove_packages (PkBackend *backend, PkBackendJob *job, PkBitfield transaction_flags, gchar **package_ids, gboolean allow_deps, gboolean autoremove)
{
	gchar *package_ids_temp;
	gchar *transaction_flags_temp;

	package_ids_temp = pk_package_ids_to_string (package_ids);
	transaction_flags_temp = pk_transaction_flag_bitfield_to_string (transaction_flags);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "remove-packages", transaction_flags_temp, package_ids_temp, pk_backend_bool_to_string (allow_deps), pk_backend_bool_to_string (autoremove), NULL);
	g_free (transaction_flags_temp);
	g_free (package_ids_temp);
}

/**
 * pk_backend_repo_enable:
 */
void
pk_backend_repo_enable (PkBackend *backend, PkBackendJob *job, const gchar *rid, gboolean enabled)
{
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "repo-enable", rid, pk_backend_bool_to_string (enabled), NULL);
}

/**
 * pk_backend_resolve:
 */
void
pk_backend_resolve (PkBackend *backend, PkBackendJob *job, PkBitfield filters, gchar **package_ids)
{
	gchar *filters_text;
	gchar *package_ids_temp;

	filters_text = pk_filter_bitfield_to_string (filters);
	package_ids_temp = pk_package_ids_to_string (package_ids);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "resolve", filters_text, package_ids_temp, NULL);
	g_free (package_ids_temp);
	g_free (filters_text);
}

/**
 * pk_backend_search_details:
 */
void
pk_backend_search_details (PkBackend *backend, PkBackendJob *job, PkBitfield filters, gchar **values)
{
	gchar *filters_text;
	gchar *search;
	filters_text = pk_filter_bitfield_to_string (filters);
	search = g_strjoinv ("&", values);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "search-details", filters_text, search, NULL);
	g_free (filters_text);
	g_free (search);
}

/**
 * pk_backend_search_files:
 */
void
pk_backend_search_files (PkBackend *backend, PkBackendJob *job, PkBitfield filters, gchar **values)
{
	gchar *filters_text;
	gchar *search;
	filters_text = pk_filter_bitfield_to_string (filters);
	search = g_strjoinv ("&", values);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "search-file", filters_text, search, NULL);
	g_free (filters_text);
	g_free (search);
}

/**
 * pk_backend_search_groups:
 */
void
pk_backend_search_groups (PkBackend *backend, PkBackendJob *job, PkBitfield filters, gchar **values)
{ 
	gchar *filters_text;
	gchar *search;
	filters_text = pk_filter_bitfield_to_string (filters);
	search = g_strjoinv ("&", values);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "search-group", filters_text, search, NULL);
	g_free (filters_text);
	g_free (search);
}

/**
 * pk_backend_search_names:
 */
void
pk_backend_search_names (PkBackend *backend, PkBackendJob *job, PkBitfield filters, gchar **values)
{
	gchar *filters_text;
	gchar *search;
	filters_text = pk_filter_bitfield_to_string (filters);
	search = g_strjoinv ("&", values);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "search-name", filters_text, search, NULL);
	g_free (filters_text);
	g_free (search);
}

/**
 * pk_backend_update_packages:
 */
void
pk_backend_update_packages (PkBackend *backend, PkBackendJob *job, PkBitfield transaction_flags, gchar **package_ids)
{
	gchar *package_ids_temp;
	gchar *transaction_flags_temp;

	/* send the complete list as stdin */
	package_ids_temp = pk_package_ids_to_string (package_ids);
	transaction_flags_temp = pk_transaction_flag_bitfield_to_string (transaction_flags);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "update-packages", transaction_flags_temp, package_ids_temp, NULL);
	g_free(transaction_flags_temp);
	g_free (package_ids_temp);
}

/**
 * pk_backend_get_packages:
 */
void
pk_backend_get_packages (PkBackend *backend, PkBackendJob *job, PkBitfield filters)
{
	gchar *filters_text;

	filters_text = pk_filter_bitfield_to_string (filters);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "get-packages", filters_text, NULL);
	g_free (filters_text);
}

/**
 * pk_backend_get_repo_list:
 */
void
pk_backend_get_repo_list (PkBackend *backend, PkBackendJob *job, PkBitfield filters)
{
	gchar *filters_text;

	filters_text = pk_filter_bitfield_to_string (filters);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "get-repo-list", filters_text, NULL);
	g_free (filters_text);
}

/**
 * pk_backend_required_by:
 */
void
pk_backend_required_by (PkBackend *backend, PkBackendJob *job, PkBitfield filters, gchar **package_ids, gboolean recursive)
{ 
	gchar *package_ids_temp;
	gchar *filters_text;

	package_ids_temp = pk_package_ids_to_string (package_ids);
	filters_text = pk_filter_bitfield_to_string (filters);
	pk_backend_spawn_helper (spawn, job, BACKEND_FILE, "required-by", filters_text, package_ids_temp, pk_backend_bool_to_string (recursive), NULL);
	g_free (filters_text);
	g_free (package_ids_temp);
}

/**
 * pk_backend_get_description:
 */
const gchar *
pk_backend_get_description (PkBackend *backend)
{
    return "Portage";
}

/**
 * pk_backend_get_author:
 */
const gchar *
pk_backend_get_author (PkBackend *backend)
{
    return "Mounir Lamouri (volkmar) <mounir.lamouri@gmail.com>, Fabio Erculiani <lxnay@sabayon.org>";
}

/**
 * pk_backend_supports_parallelization:
 */
gboolean
pk_backend_supports_parallelization (PkBackend *backend)
{
	return TRUE;
}
