/*
 *  pamac-vala
 *
 *  Copyright (C) 2017 Chris Cromer <cromer@cromnix.org>
 *  Copyright (C) 2014-2017 Guillaume Benoit <guillaume@manjaro.org>
 *
 *  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 3 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 get of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace Pamac {
	class Config {
		string conf_path;
		HashTable<string,string> _environment_variables;

		public bool recurse { get; private set; }
		public uint64 refresh_period { get; private set; }
		public bool no_update_hide_icon { get; private set; }
#if DISABLE_AUR
#else
		public bool enable_aur { get; private set; }
		public bool search_aur { get; private set; }
		public string aur_build_dir { get; private set; }
		public bool check_aur_updates { get; private set; }
#endif
		public uint64 keep_num_pkgs { get; private set; }
		public bool rm_only_uninstalled { get; private set; }
		public unowned HashTable<string,string> environment_variables {
			get {
				return _environment_variables;
			}
		}

		public Config (string path) {
			conf_path = path;
			//get environment variables
			_environment_variables = new HashTable<string,string> (str_hash, str_equal);
			var utsname = Posix.utsname();
			_environment_variables.insert ("HTTP_USER_AGENT", "pamac (%s %s)".printf (utsname.sysname, utsname.machine));
			unowned string? variable = Environment.get_variable ("http_proxy");
			if (variable != null) {
				_environment_variables.insert ("http_proxy", variable);
			}
			variable = Environment.get_variable ("https_proxy");
			if (variable != null) {
				_environment_variables.insert ("https_proxy", variable);
			}
			variable = Environment.get_variable ("ftp_proxy");
			if (variable != null) {
				_environment_variables.insert ("ftp_proxy", variable);
			}
			variable = Environment.get_variable ("socks_proxy");
			if (variable != null) {
				_environment_variables.insert ("socks_proxy", variable);
			}
			variable = Environment.get_variable ("no_proxy");
			if (variable != null) {
				_environment_variables.insert ("no_proxy", variable);
			}
			// set default option
			refresh_period = 6;
			reload ();
		}

		public void reload () {
			// set default options
			recurse = false;
			no_update_hide_icon = false;
#if DISABLE_AUR
#else
			enable_aur = false;
			search_aur = false;
			aur_build_dir = "/tmp";
			check_aur_updates = false;
#endif
			keep_num_pkgs = 3;
			rm_only_uninstalled = false;
			parse_file (conf_path);
		}

		void parse_file (string path) {
			var file = GLib.File.new_for_path (path);
			if (file.query_exists ()) {
				try {
					// Open file for reading and wrap returned FileInputStream into a
					// DataInputStream, so we can read line by line
					var dis = new DataInputStream (file.read ());
					string? line;
					// Read lines until end of file (null) is reached
					while ((line = dis.read_line ()) != null) {
						if (line.length == 0) {
							continue;
						}
						// ignore whole line and end of line comments
						string[] splitted = line.split ("#", 2);
						line = splitted[0].strip ();
						if (line.length == 0) {
							continue;
						}
						splitted = line.split ("=", 2);
						unowned string key = splitted[0]._strip ();
						if (key == "RemoveUnrequiredDeps") {
							recurse = true;
						} else if (key == "RefreshPeriod") {
							if (splitted.length == 2) {
								unowned string val = splitted[1]._strip ();
								refresh_period = uint64.parse (val);
							}
						} else if (key == "NoUpdateHideIcon") {
							no_update_hide_icon = true;
#if DISABLE_AUR
#else
						} else if (key == "EnableAUR") {
							enable_aur = true;
						} else if (key == "SearchInAURByDefault") {
							search_aur = true;
						} else if (key == "BuildDirectory") {
							if (splitted.length == 2) {
								aur_build_dir = splitted[1]._strip ();
							}
						} else if (key == "CheckAURUpdates") {
							check_aur_updates = true;
#endif
						} else if (key == "KeepNumPackages") {
							if (splitted.length == 2) {
								unowned string val = splitted[1]._strip ();
								keep_num_pkgs = uint64.parse (val);
							}
						} else if (key == "OnlyRmUninstalled") {
							rm_only_uninstalled = true;
						}
					}
				} catch (GLib.Error e) {
					GLib.stderr.printf("%s\n", e.message);
				}
			} else {
				GLib.stderr.printf ("File '%s' doesn't exist.\n", path);
			}
		}
	}
}