/* -*- 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@sabayon.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 = "entropyBackend.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, "entropy");
	/* 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_get_mime_types:
 */
gchar **
pk_backend_get_mime_types(PkBackend *backend)
{
	const gchar *mime_types[] = {
				"application/entropy-package",
				"application/entropy-webinstall",
				NULL };
	return g_strdupv ((gchar **) mime_types);
}

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

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

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

/**
 * pk_backend_what_provides:
 */
void
pk_backend_what_provides(PkBackend *backend,
			 PkBackendJob *job,
			 PkBitfield filters,
			 gchar **search)
{
	gchar *filters_text;
	filters_text = pk_filter_bitfield_to_string(filters);
	pk_backend_spawn_helper(spawn, job, BACKEND_FILE,
				"what-provides", filters_text,
				"any", search, NULL);
	g_free(filters_text);
}

/**
 * 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_distro_upgrades:
 */
void
pk_backend_get_distro_upgrades(PkBackend *backend, PkBackendJob *job)
{
	pk_backend_spawn_helper(spawn, job, BACKEND_FILE,
				"get-distro-upgrades", NULL);
}

/**
 * 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;

	/* 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_install_files:
 */
void
pk_backend_install_files(PkBackend *backend,
			 PkBackendJob *job,
			 PkBitfield transaction_flags,
			 gchar **full_paths)
{
	gchar *package_ids_temp;
	gchar *transaction_flags_temp;

	/* send the complete list as stdin */
	package_ids_temp = g_strjoinv(PK_BACKEND_SPAWN_FILENAME_DELIM,
				      full_paths);
	transaction_flags_temp = pk_transaction_flag_bitfield_to_string (transaction_flags);
	pk_backend_spawn_helper(spawn, job, BACKEND_FILE,
				"install-files",
				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 "Entropy";
}

/**
 * pk_backend_get_author:
 */
const gchar *
pk_backend_get_author (PkBackend *backend)
{
	return "Fabio Erculiani (lxnay) <lxnay@sabayon.org>";
}

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