using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
using System.Linq;
using System.Xml.Linq;
using System.Diagnostics;

namespace libThermoControl
{
    public static class Configuration
    {
        private const string config_file = "config.xml";
        private const string temp_file = "current_temp.bin";
        
        
        public static int CurrentTemp { get { return ReadTemp(); } set { WriteTemp(value); } }

        public static readonly string THERMISTAT_DEVICE = ""; // 60
        public static readonly int MIN_TEMP = 0; // 60
        public static readonly int MAX_TEMP = 0; // 90
        public static readonly int DEFAULT_TEMP = 0; // 70
        public static readonly string DEFAULT_MODE = ""; // cool
        public static readonly string DEFAULT_FAN_SPEED = ""; // auto_fan

        [Conditional("CONFIG_UNITTEST")]
        public static void UnitTest()
        {
        }

        static Configuration()
        {
            // load configuration
            //using (FileStream fs = new FileStream(config_file, FileMode.Open, FileAccess.Read, FileShare.Read))
            //{
                
            //}
            XDocument xdoc = XDocument.Load(config_file);

            Type p = typeof(Configuration);
            var fields = new List<FieldInfo>(p.GetFields(BindingFlags.Public | BindingFlags.Static));
            foreach (var field in fields)
            {
                //Console.WriteLine("Name: '{0}' value: '{1}'", field.Name, xdoc);
                //var lv1s = from lv1 in xdoc.Descendants("level1")
                //           select lv1.Attribute("name").Value;
               //var t = xdoc.Root.DescendantNodesAndSelf().ToList();

                var o = xdoc.Root.Elements(field.Name);
                var list = o.ToList();
                if (list.Count == 0)
                {
                    Console.WriteLine("Name: '{0}' Default: '{1}' Configured: '{1}'", field.Name, field.GetValue(null).ToString());
                }
                else
                {
                    var t = xdoc.Root.Elements(field.Name).ToList().FirstOrDefault().Value;
                    Console.WriteLine("Name: '{0}' Default: '{1}' Configured: '{2}'", field.Name, field.GetValue(null).ToString(), t);
                    field.SetValue(null, Convert.ChangeType(t,field.FieldType));
                }
            }

            // get the current temp from file
            //ReadTemp();
        }

        static void WriteTemp(int temp)
        {
            using (FileStream fs = new FileStream(temp_file, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read))
            {
                using (BinaryWriter bw = new BinaryWriter(fs))
                {
                    bw.Write((byte)temp);
                    bw.Flush();
                    bw.Close();
                }
            }
        }
        static int ReadTemp()
        {
            int temp = 0;
            if (!File.Exists(temp_file))
            {
                WriteTemp(Configuration.DEFAULT_TEMP);
            }
            else
            {
                FileInfo fi = new FileInfo(temp_file);
                if (fi.Length == 0)
                {
                    WriteTemp(Configuration.DEFAULT_TEMP);
                }
            }


            using (FileStream fs = new FileStream(temp_file, FileMode.OpenOrCreate, FileAccess.Read, FileShare.Read))
            {
                using (BinaryReader br = new BinaryReader(fs))
                {
                    temp = br.ReadByte();
                    br.Close();
                }
            }
            return temp;
        }
    }
}