using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;

namespace EDJournal {
    public class HumanReadableMissionName {
        private static Dictionary<string, string> humanreadable = null;

        private static void LoadMissions() {
            try {
                string dir = AppDomain.CurrentDomain.BaseDirectory;
                string file = Path.Combine(dir, "MissionNames.xml");

                XmlDocument document = new XmlDocument();

                using (FileStream stream = new FileStream(file, FileMode.Open)) {
                    document.Load(stream);
                    XmlNode missions = document.DocumentElement;

                    if (missions == null || missions.Name != "Missions") {
                        throw new ApplicationException("Invalid XML");
                    }

                    humanreadable = new Dictionary<string, string>();

                    foreach (XmlNode mission in missions.ChildNodes) {
                        string mission_key = mission.Attributes["Name"]?.Value;
                        string mission_name = mission.InnerText;

                        if (mission_key == null || mission_name == null) {
                            continue;
                        }

                        humanreadable.Add(mission_key, mission_name);
                    }
                }
            } catch (Exception) {
                humanreadable = null;
            }
        }

        public static string MakeHumanReadableName(string name) {
            LoadMissions();

            if (humanreadable == null || name == null) {
                return null;
            }

            if (humanreadable.ContainsKey(name)) {
                return humanreadable[name];
            }

            return null;
        }
    }
}