// Copyright (c) 2023 - schick Informatik
// bsmd.AIS2Service [MonitorGroup.cs]: Daniel Schick
// Description: Group container for zones
// 
using log4net;
using System;
using System.Collections.Generic;
using System.IO;
using System.Xml.Linq;

namespace bsmd.AIS2Service
{
    #region class MonitorGroup

    public class MonitorGroup : DBEntity
    {

        private static readonly ILog _log = LogManager.GetLogger(typeof(MonitorGroup));

        #region fields

        private string _name;
        private readonly List<MonitorZone> _zones = new List<MonitorZone>();

        #endregion

        #region Construction

        public MonitorGroup(long id, string name) : base(id)
        {
            _name = name;
        }

        #endregion

        #region Properties

        public List<MonitorZone> Zones { get { return _zones; } }

        public string Name { get { return _name; } set { _name = value; } }

        #endregion

        #region public static methods

        /// <summary>
        /// Da Basti nun eine Datei mit allen Elementen exportiert gibt es eine einzelne Funktion, die alles 
        /// importiert
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>
        public static List<MonitorGroup> LoadGroups(string filename)
        {
            List<MonitorGroup> groups = new List<MonitorGroup>();
            try
            {
                if (File.Exists(filename))
                {
                    XDocument kml = XDocument.Load(filename);
                    XNamespace ns = "http://www.opengis.net/kml/2.2";

                    foreach (XElement rootFolderNode in kml.Root.Element(ns + "Document").Element(ns + "Folder").Elements(ns + "Folder"))
                    {
                        MonitorGroup mg = new MonitorGroup(-1, rootFolderNode.Element(ns + "name").Value);
                        int sequence = 1;
                        foreach (XElement placemark in rootFolderNode.Elements(ns + "Placemark"))
                        {
                            MonitorZone mz = new MonitorZone(-1, placemark.Element(ns + "name").Value);
                            mz.Active = true;
                            mz.Sequence = sequence;
                            // now add all vertices                    
                            string[] vertices = placemark.Element(ns + "Polygon").Element(ns + "outerBoundaryIs").Element(ns + "LinearRing").Element(ns + "coordinates").Value.Split(' ');
                            for (int i = 0; i < vertices.Length - 1; i++)
                            {
                                string[] pointElems = vertices[i].Trim().Split(',');
                                if (pointElems.Length != 3) continue;
                                GeoPoint gp = new GeoPoint(-1);
                                gp.Lon = Double.Parse(pointElems[0], System.Globalization.NumberFormatInfo.InvariantInfo);
                                gp.Lat = Double.Parse(pointElems[1], System.Globalization.NumberFormatInfo.InvariantInfo);
                                mz.Vertices.Add(gp);
                            }

                            mg.Zones.Add(mz);
                            sequence++;
                        }

                        groups.Add(mg);
                    }
                }
            }
            catch (Exception ex)
            {
                _log.Error(ex.ToString());
            }
            return groups;
        }

        #endregion

        #region public methods

        public override string ToString()
        {
            return this.Name;
        }

        #endregion

    }

    #endregion
}