using IniParser;
using IniParser.Model;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EmpathicQbt.ConsoleServer {

    public class Configuration {
        private readonly string CONFIG_FILE_NAME = "DragonbornSpeaksNaturally.ini";

        // NOTE: Relative to SkyrimVR.exe
        private static readonly string[] SEARCH_DIRECTORIES = {
            "Data\\Plugins\\Sumwunn\\",
            "..\\",
            ""
        };

        private string iniFilePath = null;

        private IniData global = null;
        private IniData local = null;
        private IniData merged = null;

        public Configuration() {
            iniFilePath = ResolveFilePath(CONFIG_FILE_NAME);

            loadLocal();
            loadGlobal();

            merged = new IniData();
            merged.Merge(global);
            merged.Merge(local);
        }

        public string GetIniFilePath() {
            return iniFilePath;
        }

        public string Get(string section, string key, string def) {
            string val = merged[section][key];
            if (val == null)
                return def;
            return val;
        }

        private void loadGlobal() {
            global = new IniData();
        }

        private void loadLocal() {
            local = loadIniFromFilePath(iniFilePath);
            if (local == null)
                local = new IniData();
        }

        public static string ResolveFilePath(string filename) {
            foreach (string directory in SEARCH_DIRECTORIES) {
                string filepath = directory + filename;
                if (File.Exists(filepath)) {
                    return Path.GetFullPath(filepath); ;
                }
            }
            return null;
        }

        private IniData loadIniFromFilePath(string filepath) {
            if (filepath != null) {
                Trace.TraceInformation("Loading ini from path " + filepath);
                try {
                    var parser = new FileIniDataParser();
                    return parser.ReadFile(filepath);
                } catch (Exception ex) {
                    Trace.TraceError("Failed to load ini file at " + filepath);
                    Trace.TraceError(ex.ToString());
                }
            }
            return null;
        }
    }
}