//   SparkleShare, a collaboration and sharing tool.
//   Copyright (C) 2010  Hylke Bons (hi@planetpeanut.uk)
//
//   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 copy of the GNU General Public License
//   along with this program. If not, see (http://www.gnu.org/licenses/).


using System;
using System.Xml;
using System.Xml.Linq;

using IO = System.IO;

namespace Sparkles {

    public class Preset : XmlDocument {

        public static string PresetsPath = "";

        public static string LocalPresetsPath = IO.Path.Combine (
            Environment.GetFolderPath (Environment.SpecialFolder.ApplicationData), "org.sparkleshare.SparkleShare", "presets");

        new public string Name { get { return GetValue ("info", "name"); } }
        public string Description { get { return GetValue ("info", "description"); } }
        public string Backend { get { return GetValue ("info", "backend"); } }
        public string Fingerprint { get { return GetValue ("info", "fingerprint"); } }
        public string AnnouncementsUrl { get { return GetValue ("info", "announcements_url"); } }
        public string Address { get { return GetValue ("address", "value"); } }
        public string AddressExample { get { return GetValue ("address", "example"); } }
        public string Path { get { return GetValue ("path", "value"); } }
        public string PathExample { get { return GetValue ("path", "example"); } }

        public string ImagePath {
            get {
                string image_file_name = GetValue ("info", "icon");
                string image_path = IO.Path.Combine (preset_directory, image_file_name);
                
                if (IO.File.Exists (image_path))
                    return image_path;
                
                return IO.Path.Combine (PresetsPath, image_file_name);
            }
        }
        
        public bool PathUsesLowerCase {
            get {
                string uses_lower_case = GetValue ("path", "uses_lower_case");
                
                if (!string.IsNullOrEmpty (uses_lower_case))
                    return uses_lower_case.Equals (bool.TrueString);
                else
                    return false;
            }
        }

        string preset_directory;


        public Preset (string preset_path)
        {
            preset_directory = IO.Path.GetDirectoryName (preset_path);
            Load (preset_path);
        }


        public static Preset Create (string name, string description, string address_value,
            string address_example, string path_value, string path_example)
        {
            string preset_path = IO.Path.Combine (LocalPresetsPath, name + ".xml");

            if (IO.File.Exists (preset_path))
                return null;

            string icon_name = "own-server.png";

            XElement xml =
                new XElement ("sparkleshare",
                    new XElement ("preset",
                        new XElement ("info",
                            new XElement ("name", name),
                            new XElement ("description", description),
                            new XElement ("icon", icon_name)
                        ),
                        new XElement ("address",
                            new XElement ("value", address_value),
                            new XElement ("example", address_example)
                        ),
                        new XElement ("path",
                            new XElement ("value", path_value),
                            new XElement ("example", path_example)
                        )
                    )
                );

            if (!IO.Directory.Exists (LocalPresetsPath))
                IO.Directory.CreateDirectory (LocalPresetsPath);

            IO.File.WriteAllText (preset_path, xml.ToString ());
            return new Preset (preset_path);
        }


        private string GetValue (string a, string b)
        {
            XmlNode node = SelectSingleNode ("/sparkleshare/preset/" + a + "/" + b + "/text()");

            if (node != null && !string.IsNullOrEmpty (node.Value))
                return node.Value;
            else
                return null;
        }
    }
}