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;
using libhtmlscrapper;

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 int ExternalTemp { get { return GetExternalTemp(); } }
        public static int GetTemperatureAdjustment()
        {
            int e_temp = Configuration.ExternalTemp;
            int d_temp = Configuration.DEFAULT_TEMP;
            int scale = 5;
            int s = (d_temp - e_temp) / scale;
            int offset = 2;
            int t = (d_temp + s) - offset;
            return t;
        }

        public static readonly string WEATHER_URL = ""; // 60
        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;
        }

        static int GetExternalTemp()
        {
            int temp = 0;
            List<string> BannedLinks = new List<string>();
            using (GenericScrapper scrapper = new GenericScrapper(WEATHER_URL, true, BannedLinks, false, true))
            {
                scrapper.BannedHTMLLinks = BannedLinks;
                scrapper.GetUrlsToDownload += scrapper_GetUrlsToDownload;
                scrapper.CreateDownloadUrls();
                if (scrapper.UrlsToDownload.Count > 0)
                {
                    var t = scrapper.UrlsToDownload.FirstOrDefault();
                    if (t != null && t.Tag != null)
                    {
                        try
                        {
                            int k = Convert.ToInt32(t.Tag);
                            temp = k;
                        }
                        catch (Exception)
                        {
                            temp = 0;
                        }
                    }
                }
            }
            return temp;
        }

        static void scrapper_GetUrlsToDownload(out List<URLLink> UrlsToDownload, GenericScrapper scrapper)
        {
            UrlsToDownload = new List<URLLink>();
            StreamReader sr = scrapper.HTMLReader;
            while (!sr.EndOfStream)
            {
                string line = sr.ReadLine();
                if (line.ToLower().Contains(string.Format("<tr class=\"pre\">").ToLower()))
                {
                    line = sr.ReadLine();
                    if (line.ToLower().Contains(string.Format("<th scope=\"row\">Now</th>").ToLower()))
                    {
                        line = sr.ReadLine();
                        if (line.ToLower().Contains(string.Format("<td>").ToLower()))
                        {
                            //Console.WriteLine("Found: {0}", line);
                            string raw_line = line;
                            raw_line = raw_line.Replace("<td>", "").Replace("</td>", "").Replace("&deg;","");
                            raw_line = raw_line.Trim();
                            //Console.WriteLine("Found Raw: {0}", line);
                            //Console.WriteLine("Found Parsed: {0}", raw_line);
                            UrlsToDownload.Add(new URLLink("Now", new Uri(scrapper.URL), raw_line));
                            break;
                        }
                    }
                }
            }
            sr.Close();
        }
    }
}