using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Reflection;
using System.Xml;
using System.Xml.Serialization;

namespace bsmd.AISService.AIS
{
    [Serializable]
    public class AIS_Configuration
    {
        private string filename;
        private string dbConnectionString;        
        private int dbUpdateInterval = 500; // milliseconds
        private int dbMinPosReportTimeDifference = 120; // seconds
        private int stationIsOfflineTimeDifferenceSecs = 180; // seconds
        private int targetStaleMins = 31; // minutes

        public List<SerialPort> SerialPorts = new List<SerialPort>();
        public List<TelnetConnection> TelnetConnections = new List<TelnetConnection>();

        #region Properties

        public string Configuration_Path
        {
            get { return this.filename; }
            set { this.filename = value; }
        }

        public string DBConnectionString
        {
            get { return this.dbConnectionString; }
            set { this.dbConnectionString = value; }
        }     

        /// <summary>
        /// timer interval for database updates
        /// </summary>
        public int DBUpdateInterval
        {
            get { return this.dbUpdateInterval; }
            set { this.dbUpdateInterval = value; }
        }

        /// <summary>
        /// minimum amount of minutes between two position reports to be
        /// written to database
        /// </summary>
        public int DBMinPosReportTimeDifference
        {
            get { return this.dbMinPosReportTimeDifference; }
            set { this.dbMinPosReportTimeDifference = value; }
        }

        /// <summary>
        /// number of seconds after which a station is marked offline since
        /// sending the last pos report
        /// </summary>
        public int StationIsOfflineTimeDifferenceSecs
        {
            get { return this.stationIsOfflineTimeDifferenceSecs; }
            set { this.stationIsOfflineTimeDifferenceSecs = value; }
        }

        /// <summary>
        /// if last update is older than this value then the target ist removed from
        /// the current target queue (target went offline or out of range)
        /// </summary>
        public int TargetStaleMins
        {
            get { return this.targetStaleMins; }
            set { this.targetStaleMins = value; }
        }

        /// <summary>
        /// Root path to where Viewer stores OSM tiles
        /// </summary>
        public string TilePath { get; set; }

        /// <summary>
        /// full path to logfile
        /// </summary>
        public string LogfilePath { get; set; }

        /// <summary>
        /// Delete positions after this many days
        /// </summary>
        public int PurgeDays { get; set; } = 30;

        /// <summary>
        /// outputs assembly version
        /// </summary>
        public static string VersionInfo
        {
            get
            {
                Version version = Assembly.GetExecutingAssembly().GetName().Version;
                return version.ToString();
            }
        }

        #endregion

        #region Load/Save

        public static AIS_Configuration Load(string filename)
        {
            if (!File.Exists(filename)) return null;

            // Create an instance of the XmlSerializer specifying type and namespace.
            XmlSerializer serializer = new XmlSerializer(typeof(AIS_Configuration));

            // A FileStream is needed to read the XML document.
            FileStream fs = new FileStream(filename, FileMode.Open);
            XmlReader reader = new XmlTextReader(fs);

            AIS_Configuration configuration = serializer.Deserialize(reader) as AIS_Configuration;
            reader.Close();
            configuration.filename = filename;


            return configuration;
        }

        public bool Save()
        {
            bool retval = true;
            try
            {
                XmlSerializer serializer = new XmlSerializer(typeof(AIS_Configuration));
                Stream fs = new FileStream(this.filename, FileMode.Create);
                XmlWriter writer = new XmlTextWriter(fs, new UTF8Encoding());                
                serializer.Serialize(writer, this);
                writer.Close();
            }
            catch (Exception e)
            {
                System.Diagnostics.Debug.Write("Error during Serialize: " + e.ToString());
                retval = false;
            }
            return retval;
        }

        #endregion        

        #region internal classes

        public class SerialPort
        {
            public string station;
            public string ComPort;
            public int BaudRate = 9600;
            public bool enabled = false;
        }

        public class TelnetConnection
        {
            public string ipAddress;
            public int port;
        }

        #endregion

    }
}