using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.ComponentModel.Composition;
using System.ComponentModel;
using System.Globalization;
using AirScout.PlaneFeeds.Plugin.MEFContract;
using System.Diagnostics;
using System.Net;
using System.IO;
using System.Web.Script.Serialization;
using System.Collections;
using System.Xml.Serialization;
using System.Xml.Linq;

namespace AirScout.PlaneFeeds.Plugin.RB24
{

    public class RB24Settings
    {

        [Browsable(false)]
        [DefaultValue("")]
        [XmlIgnore]
        public string DisclaimerAccepted { get; set; }

        [Browsable(true)]
        [CategoryAttribute("Web Feed")]
        [DescriptionAttribute("Save downloaded JSON to file")]
        [DefaultValue(false)]
        [XmlIgnore]
        public bool SaveToFile { get; set; }

        [Browsable(true)]
        [CategoryAttribute("Web Feed")]
        [DescriptionAttribute("Base URL for website.")]
        [DefaultValue("https://data.rb24.com/live?aircraft=&airport=&fn=&far=&fms=&zoom=6&flightid=&bounds=%MAXLAT%,%MAXLON%,%MINLAT%,%MINLON%&timestamp=%TIMESTAMP%&designator=iata&showLastTrails=true&ff=false&os=web&adsb=true&adsbsat=true&asdi=true&ocea=true&mlat=true&sate=true&uat=true&hfdl=true&esti=true&asdex=true&flarm=true&aust=true&diverted=false&delayed=false&isga=false&ground=true&onair=true&blocked=false&station=&class[]=?&class[]=A&class[]=B&class[]=C&class[]=G&class[]=H&class[]=M&airline=&route=&country=")]
        public string URL { get; set; }

        [Browsable(true)]
        [CategoryAttribute("Web Feed")]
        [DescriptionAttribute("Timeout for loading the site.")]
        [DefaultValue(30)]
        [XmlIgnore]
        public int Timeout { get; set; }


        public RB24Settings()
        {
            Default();
            Load(true);
        }


        /// <summary>
        /// Sets all properties to their default value according to the [DefaultValue=] attribute
        /// </summary>
        public void Default()
        {
            // set all properties to their default values according to definition in [DeafultValue=]
            foreach (var p in this.GetType().GetProperties())
            {
                try
                {
                    // initialize all properties with default value if set
                    if (Attribute.IsDefined(p, typeof(DefaultValueAttribute)))
                    {
                        p.SetValue(this, ((DefaultValueAttribute)Attribute.GetCustomAttribute(
                            p, typeof(DefaultValueAttribute)))?.Value, null);
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("[" + this.GetType().Name + "]: Cannot set default value of: " + p.Name + ", " + ex.Message);
                }
            }
        }

        /// <summary>
        /// Loads settings from a XML-formatted configuration file into settings.
        /// </summary>
        /// <param name="loadall">If true, ignore the [XmlIgnore] attribute, e.g. load all settings available in the file.<br>If false, load only settings without [XmlIgore] attrbute.</br></param>
        /// <param name="filename">The filename of the settings file.</param>
        public void Load(bool loadall, string filename = "")
        {
            // use standard filename if empty
            // be careful because Linux file system is case sensitive
            if (String.IsNullOrEmpty(filename))
                filename = new Uri(Assembly.GetExecutingAssembly().GetName().CodeBase.Replace(".dll", ".cfg").Replace(".DLL", ".CFG")).LocalPath;
            // do nothing if file not exists
            if (!File.Exists(filename))
                return;
            try
            {
                string xml = "";
                using (StreamReader sr = new StreamReader(File.OpenRead(filename)))
                {
                    xml = sr.ReadToEnd();
                }
                XDocument xdoc = XDocument.Parse(xml);
                PropertyInfo[] properties = this.GetType().GetProperties();
                foreach (PropertyInfo p in properties)
                {
                    if (!loadall)
                    {
                        // check on XmlIgnore attribute, skip if set
                        object[] attr = p.GetCustomAttributes(typeof(XmlIgnoreAttribute), false);
                        if (attr.Length > 0)
                            continue;
                    }
                    try
                    {
                        // get matching element
                        XElement typenode = xdoc.Element(this.GetType().Name);
                        if (typenode != null)
                        {
                            XElement element = typenode.Element(p.Name);
                            if (element != null)
                                p.SetValue(this, Convert.ChangeType(element.Value, p.PropertyType), null);
                        }
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("[" + this.GetType().Name + "]: Error while loading property[" + p.Name + " from " + filename + ", " + ex.Message);
                    }
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine("[" + this.GetType().Name + "]: Cannot load settings from " + filename + ", " + ex.Message);
            }
        }

        /// <summary>
        /// Saves settings from settings into a XML-formatted configuration file
        /// </summary>
        /// <param name="saveall">If true, ignore the [XmlIgnore] attribute, e.g. save all settings.<br>If false, save only settings without [XmlIgore] attrbute.</param>
        /// <param name="filename">The filename of the settings file.</param>
        public void Save(bool saveall, string filename = "")
        {
            // use standard filename if empty
            // be careful because Linux file system is case sensitive
            if (String.IsNullOrEmpty(filename))
                filename = new Uri(Assembly.GetExecutingAssembly().GetName().CodeBase.Replace(".dll", ".cfg").Replace(".DLL", ".CFG")).LocalPath;
            XmlAttributeOverrides overrides = new XmlAttributeOverrides();
            if (saveall)
            {
                // ovverride the XmlIgnore attributes to get all serialized
                PropertyInfo[] properties = this.GetType().GetProperties();
                foreach (PropertyInfo p in properties)
                {
                    XmlAttributes attribs = new XmlAttributes { XmlIgnore = false };
                    overrides.Add(this.GetType(), p.Name, attribs);
                }
            }
            try
            {
                using (StreamWriter sw = new StreamWriter(File.Create(filename)))
                {
                    XmlSerializer s = new XmlSerializer(this.GetType(), overrides);
                    s.Serialize(sw, this);
                }
            }
            catch (Exception ex)
            {
                throw new InvalidOperationException("[" + this.GetType().Name + "]: Cannot save settings to " + filename + ", " + ex.Message);
            }
        }
    }

    [Export(typeof(IPlaneFeedPlugin))]
    [ExportMetadata("Name", "PlaneFeedPlugin")]
    public class RB24Plugin : IPlaneFeedPlugin
    {
        private RB24Settings Settings = new RB24Settings();

        public string Name
        {
            get
            {
                return "[WebFeed]           www.radarbox24.com";
            }
        }

        public string Info
        {
            get
            {
                return "Web feed from www.radarbox24.com\n" +
                        "See https:///www.radarbox24.com\n\n" +
                        "(c)AirScout(www.airscout.eu)\n\n" +
                        "CAUTION: Radarbox24 does not provide HEX - values, the feed is getting the values only from internal database using plane registry values";
            }
        }

        public string Version
        {
            get
            {
                return Assembly.GetExecutingAssembly().GetName().Version.ToString();
            }
        }

        public bool HasSettings
        {
            get
            {
                return true;
            }
        }

        public bool CanImport
        {
            get
            {
                return false;
            }
        }

        public bool CanExport
        {
            get
            {
                return false;
            }
        }

        public string Disclaimer
        {
            get
            {
                return "This plane feed might fetch data from an Internet server via Deep Link\n" +
                        "technology(see http://en.wikipedia.org/wiki/Deep_link)\n." +
                        "The use is probably not intended by the website owners and could be changed in URL and data format frequently and without further notice.\n" +
                        "Furthermore, it might cause legal issues in some countries.\n" +
                        "By clicking on \"Accept\" you understand that you are\n\n" +
                        "DOING THAT ON YOUR OWN RISK\n\n" +
                        "The auhor of this software will not be responsible in any case.";
            }
        }

        public string DisclaimerAccepted
        {
            get
            {
                return Settings.DisclaimerAccepted;
            }
            set
            {
                Settings.DisclaimerAccepted = value;
            }
        }

        public void ResetSettings()
        {
            Settings.Default();
        }

        public void LoadSettings()
        {
            Settings.Load(true);
        }

        public void SaveSettings()
        {
            Settings.Save(true);
        }

        public object GetSettings()
        {
            return this.Settings;
        }

        public void ImportSettings()
        {
            // nothing to do
        }

        public void ExportSettings()
        {
            // nothing to do
        }

        public void Start(PlaneFeedPluginArgs args)
        {
            // nothing to do
        }

        public PlaneFeedPluginPlaneInfoList GetPlanes(PlaneFeedPluginArgs args)
        {
            // intialize variables
            VarConverter VC = new VarConverter();
            VC.AddVar("APPDIR", args.AppDirectory);
            VC.AddVar("DATADIR", args.AppDataDirectory);
            VC.AddVar("LOGDIR", args.LogDirectory);
            VC.AddVar("DATABASEDIR", args.DatabaseDirectory);
            VC.AddVar("MINLAT", args.MinLat);
            VC.AddVar("MAXLAT", args.MaxLat);
            VC.AddVar("MINLON", args.MinLon);
            VC.AddVar("MAXLON", args.MaxLon);
            VC.AddVar("MINALTM", args.MinAlt);
            VC.AddVar("MAXALTM", args.MaxAlt);
            VC.AddVar("MINALTFT", (int)UnitConverter.m_ft((double)args.MinAlt));
            VC.AddVar("MAXALTFT", (int)UnitConverter.m_ft((double)args.MaxAlt));
            VC.AddVar("TIMESTAMP", (long)DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds * 1000 - 30000);
            // initialize plane info list
            PlaneFeedPluginPlaneInfoList planes = new PlaneFeedPluginPlaneInfoList();
            string json = "";
            // calculate url and get json
            string url = VC.ReplaceAllVars(Settings.URL);
            Console.WriteLine("[" + this.GetType().Name + "]: Creating web request: " + url);
            HttpWebRequest webrequest = (HttpWebRequest)HttpWebRequest.Create(url);
            webrequest.Headers.Add("method: GET");
            webrequest.Headers.Add("authority: data.rb24.com");
            webrequest.Headers.Add("scheme: https");
            webrequest.Headers.Add("pragma: no-cache");
            webrequest.Headers.Add("cache-control: no-cache");
            webrequest.Headers.Add("sec-ch-ua: \"Google Chrome\";v=\"105\", \"Not)A; Brand\";v=\"8\", \"Chromium\";v=\"105\"");
            webrequest.Accept = "application/json, text/plain, */*";
            webrequest.Headers.Add("dnt: 1");
            webrequest.Headers.Add("sec-ch-ua-mobile: ?0");
            webrequest.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36";
            webrequest.Headers.Add("sec-ch-ua-platform: \"Windows\"");
            webrequest.Headers.Add("origin: https://www.radarbox.com");
            webrequest.Headers.Add("sec-fetch-site: cross-site");
            webrequest.Headers.Add("sec-fetch-mode: cors");
            webrequest.Headers.Add("sec-fetch-dest: empty");
            webrequest.Referer = "https://www.radarbox24.com/";
            //            webrequest.Headers.Add("accept-encoding: gzip, deflate, br");
            webrequest.Headers.Add("accept-language: de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7");
            Console.WriteLine("[" + this.GetType().Name + "]: Getting web response");
            HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();
            Console.WriteLine("[" + this.GetType().Name + "]: Reading stream");
            //            Thread.Sleep(1000);
            using (StreamReader sr = new StreamReader(webresponse.GetResponseStream()))
            {
                json = sr.ReadToEnd();
                Console.WriteLine(json);
            }
            // save raw data to file if enabled
            if (Settings.SaveToFile)
            {
                using (StreamWriter sw = new StreamWriter(args.TmpDirectory + Path.DirectorySeparatorChar + this.GetType().Name + "_" + DateTime.UtcNow.ToString("yyyy-MM-dd HH_mm_ss") + ".json"))
                {
                    sw.WriteLine(json);
                }
            }
            Console.WriteLine("[" + this.GetType().Name + "]: Analyzing data");
            JavaScriptSerializer js = new JavaScriptSerializer();
            dynamic root = js.Deserialize<dynamic>(json);
            try
            {
                // analyze json string for planes data
                // get the planes position list
                var aclist = root[0];
                foreach (var ac in aclist)
                {
                    try
                    {
                        // different handling of reading JSON between Windows (Array) & Linux (ArrayList)
                        // access to data values itself is the same
                        int len = 0;
                        if (ac.Value.GetType() == typeof(ArrayList))
                        {
                            len = ac.Value.Count;
                        }
                        else if (ac.Value.GetType() == typeof(Object[]))
                        {
                            len = ac.Value.Length;
                        }
                        // skip if too few fields in record
                        if (len < 14)
                            continue;
                        PlaneFeedPluginPlaneInfo plane = new PlaneFeedPluginPlaneInfo();
                        // get hex first
                        // Radarbox24 does not provide a HEX info
                        // leave it empty and let it fill by Reg in planefeed main thread
                        plane.Hex = "";
                        // get position
                        plane.Lat = ReadPropertyDouble(ac, 1);
                        plane.Lon = ReadPropertyDouble(ac, 2);
                        // get altitude
                        plane.Alt = ReadPropertyDouble(ac, 4);
                        // get callsign
                        plane.Call = ReadPropertyString(ac, 0);
                        // get registration
                        plane.Reg = ReadPropertyString(ac, 9);
                        // get track
                        plane.Track = ReadPropertyDouble(ac, 7);
                        // get speed
                        plane.Speed = ReadPropertyDouble(ac, 6);
                        // get position timestamp in msec
                        long l = ReadPropertyLong(ac, 3);
                        if (l != long.MinValue)
                        {
                            DateTime timestamp = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
                            timestamp = timestamp.AddMilliseconds(l);
                            plane.Time = timestamp;
                        }
                        else
                        {
                            // skip plane if no valid timestamp found
                            continue;
                        }

                        // skip plane if no reg
                        if (String.IsNullOrEmpty(plane.Reg) || (plane.Reg == "BLOCKED") || (plane.Reg == "VARIOUS"))
                            continue;

                        // get type info
                        plane.Type = ReadPropertyString(ac, 5);
                        planes.Add(plane);
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("[" + System.Reflection.MethodBase.GetCurrentMethod().Name + "]" + ex.Message);
                    }
                }
            }
            catch (Exception ex)
            {
                // do nothing if property is not found
            }
            Console.WriteLine("[" + this.GetType().Name + "]: Returning " + planes.Count + " planes");
            return planes;
        }

        public void Stop(PlaneFeedPluginArgs args)
        {
            Settings.Save(true);
        }

        // ************************************* End of interface ****************************************************


        // ************************************* Helpers ****************************************************

        [System.Diagnostics.DebuggerNonUserCode]
        private string ReadPropertyString(dynamic o, int propertyindex)
        {
            string s = null;
            try
            {
                s = o.Value[propertyindex];
            }
            catch
            {
                // do nothing if something went wrong
            }
            return s;
        }

        [System.Diagnostics.DebuggerNonUserCode]
        private int ReadPropertyInt(dynamic o, int propertyindex)
        {
            int i = int.MinValue;
            double d = ReadPropertyDouble(o, propertyindex);
            if ((d != double.MinValue) && (d >= int.MinValue) && (d <= int.MaxValue))
                i = (int)d;
            return i;
        }

        [System.Diagnostics.DebuggerNonUserCode]
        private double ReadPropertyDouble(dynamic o, int propertyindex)
        {
            double d = double.MinValue;
            try
            {
                string s = o.Value[propertyindex].ToString(CultureInfo.InvariantCulture);
                d = double.Parse(s, CultureInfo.InvariantCulture);
            }
            catch
            {
                // do nothing if something went wrong
            }
            return d;
        }

        [System.Diagnostics.DebuggerNonUserCode]
        private long ReadPropertyLong(dynamic o, int propertyindex)
        {
            long l = long.MinValue;
            try
            {
                l = long.Parse(o.Value[propertyindex].ToString());
            }
            catch
            {
                // do nothing if something went wrong
            }
            return l;
        }

        [System.Diagnostics.DebuggerNonUserCode]
        private bool ReadPropertyBool(dynamic o, int propertyindex)
        {
            bool b = false;
            try
            {
                string s = o.Value[propertyindex].ToString();
                b = s.ToLower() == "true";
            }
            catch
            {
                // do nothing if something went wrong
            }
            return b;
        }

    }


    /// <summary>
    /// //////////////////////////////////////////// Helpers ////////////////////////////////////////////
    /// </summary>

    public static class UnitConverter
    {
        public static double ft_m(double feet)
        {
            return feet / 3.28084;
        }

        public static double m_ft(double m)
        {
            return m * 3.28084;
        }

        public static double kts_kmh(double kts)
        {
            return kts * 1.852;
        }

        public static double kmh_kts(double kmh)
        {
            return kmh / 1.852;
        }

        public static double km_mi(double km)
        {
            return km * 1.609;
        }

        public static double mi_km(double mi)
        {
            return mi / 1.609;
        }
    }

    public class VarConverter : Dictionary<string, object>
    {
        public readonly char VarSeparator = '%';

        public void AddVar(string var, object value)
        {
            // adds a new var<>value pair to dictionary
            object o;
            if (this.TryGetValue(var, out o))
            {
                // item found --> update value
                o = value;
            }
            else
            {
                // item not found --> add new
                this.Add(var, value);
            }
        }

        public object GetValue(string var)
        {
            // finds a var in dictionary and returns its value
            object o;
            if (this.TryGetValue(var, out o))
            {
                // item found --> return value
                return o;
            }
            // item not found --> return null
            return null;
        }

        public string ReplaceAllVars(string s)
        {
            // check for var separotors first
            if (s.Contains(VarSeparator))
            {
                // OK, string is containing vars --> crack the string first and replace vars
                try
                {
                    string[] a = s.Split(VarSeparator);
                    // as we are always using a pair of separators the length of a[] must be odd
                    if (a.Length % 2 == 0)
                        throw new ArgumentException("Number of separators is not an even number.");
                    // create new string and replace all vars (on odd indices)
                    s = "";
                    for (int i = 0; i < a.Length; i++)
                    {
                        if (i % 2 == 0)
                        {
                            // cannot be not a var on that position
                            s = s + a[i];
                        }
                        else
                        {
                            // var identifier: upper the string and try to convert
                            a[i] = a[i].ToUpper();
                            object o;
                            if (this.TryGetValue(a[i], out o))
                            {
                                // convert floating points with invariant culture info
                                if (o.GetType() == typeof(double))
                                    s = s + ((double)o).ToString(CultureInfo.InvariantCulture);
                                else if (o.GetType() == typeof(float))
                                    s = s + ((float)o).ToString(CultureInfo.InvariantCulture);
                                else
                                    s = s + o.ToString();
                            }
                            else
                            {
                                throw new ArgumentException("Var identifier not found: " + a[i]);
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    // throw an excecption 
                    throw new ArgumentException("Error while parsing string for variables [" + ex.Message + "]: " + s);
                }
            }
            return s;
        }

    }

}