using System;
using System.Collections.Generic;
using System.IO;

namespace IDTF.Net
{
    // References:
    // http://jmol.svn.sourceforge.net/viewvc/jmol/trunk/Jmol/src/org/jmol/export/_IdtfExporter.java?revision=HEAD&view=markup
    // http://www2.iaas.msu.ru/tmp/u3d/

    public abstract class Node
    {
        public Node()
        {
            this.MetaData = new MetaData();
        }

        public string Name
        {
            get => name; 
            set
            {
                name = value.Replace("\"","\\\"");
            }
        }

        public NodeType Type { get; protected set; }

        private List<Parent> _parents;
        private string name;

        public List<Parent> Parents
        {
            get
            {
                if (_parents == null) { _parents = new List<Parent>(); }
                return _parents;
            }

            set
            {
                _parents = value;
            }
        }

        public MetaData MetaData { get; private set; }

        protected void WriteCommonOutputWithoutMetaData(StreamWriter toStream)
        {
            toStream.WriteLine(String.Format("\tNODE_NAME \"{0}\"", this.Name));
            if (_parents != null)
            {
                ListExtensions.ExportParentListToStream(_parents, toStream);
            }
        }

        protected void WriteMetaData(StreamWriter toStream)
        {
            this.MetaData.WriteOutput(toStream);
        }

    }


    public class Group : Node
   {
      public Group() : base()
      {
         
         this.Type = NodeType.GROUP;
      
      }

      public void WriteOutput(StreamWriter toStream)
      {
         toStream.WriteLine("NODE \"GROUP\" {");
         base.WriteCommonOutputWithoutMetaData(toStream);

         //Group nodes have no other content 

         base.WriteMetaData(toStream);

         toStream.WriteLine("}");
         toStream.WriteLine();
      }

   }

   public class Model : Node
   {
       public Model(): base()
      {
         this.Type = NodeType.MODEL;
      }

      public ModelResource Resource { get; set; }

      /// <summary>
      /// Determine wether faces in the model should be visible form front only, back only or both sides
      /// </summary>
      public ModelVisibility? Visibility { get; set; }

      public void WriteOutput(StreamWriter toStream)
      {
         toStream.WriteLine("NODE \"MODEL\" {");
         base.WriteCommonOutputWithoutMetaData(toStream);

         //TODO - Add Model data

         if (this.Resource != null)
         {
            toStream.WriteLine(String.Format("\tRESOURCE_NAME \"{0}\"", this.Resource.Name));
         }

         if (this.Visibility.HasValue)
         {
            toStream.WriteLine(String.Format("\tMODEL_VISIBILITY \"{0}\"", this.Visibility.Value.ToString()));
         }

         base.WriteMetaData(toStream);

         toStream.WriteLine("}");
         toStream.WriteLine();
      }

   }

   public class Light : Node
   {
       public Light() : base()
      {
         this.Type = NodeType.LIGHT;

      }

      public LightResource Resource { get; set; }

      public void WriteOutput(StreamWriter toStream)
      {
         toStream.WriteLine("NODE \"LIGHT\" {");
         base.WriteCommonOutputWithoutMetaData(toStream);

         //TODO - Add Light data

         if (this.Resource != null)
         {
            toStream.WriteLine(String.Format("\tRESOURCE_NAME \"{0}\"", this.Resource.Name));
         }
         
         base.WriteMetaData(toStream);

         toStream.WriteLine("}");
         toStream.WriteLine();
      }

   }

   public class View : Node
   {
       public View() : base()
      {
         this.Type = NodeType.VIEW;
         this.ViewData = new ViewData();
      }

      public ViewResource Resource { get; set; }
      public ViewData ViewData { get; set; }

      public void WriteOutput(StreamWriter toStream)
      {
         toStream.WriteLine("NODE \"VIEW\" {");
         base.WriteCommonOutputWithoutMetaData(toStream);

         
         if (this.Resource != null)
         {
            toStream.WriteLine(String.Format("\tRESOURCE_NAME \"{0}\"", this.Resource.Name));
         }

         //Add View data
         if (this.ViewData != null)
         {
            this.ViewData.WriteOutput(toStream);
         }

         base.WriteMetaData(toStream);
         toStream.WriteLine("}");
         toStream.WriteLine();
      }

   }

   public class ViewData
   {
      /// <summary>
      /// Create a default view with some basic settings
      /// </summary>
      /// <remarks>Createa  perspective view, in Pixel units with a 34.5 deg projection</remarks>
      public ViewData()
      {
         this.ViewType = ViewType.PERSPECTIVE;
         this.ViewAttributeScreenUnit = ViewAttributeScreenUnit.PIXEL;
         this.Projection = 34.515877;
      }

      public ViewType ViewType { get; set; }
      public ViewAttributeScreenUnit ViewAttributeScreenUnit { get; set; }
      public double Projection { get; set; }

      public void WriteOutput(StreamWriter toStream)
      {
         toStream.WriteLine("\tVIEW_DATA {");
         toStream.WriteLine("\t\tVIEW_ATTRIBUTE_SCREEN_UNIT \"{0}\"", this.ViewAttributeScreenUnit.ToString());
         toStream.WriteLine("\t\tVIEW_TYPE \"{0}\"", this.ViewType.ToString());
         toStream.WriteLine("\t\tVIEW_PROJECTION {0}", this.Projection.ToString(Format.SixDecPlFormat));
 
         //TODO - More View settings
         
         toStream.WriteLine("\t}");
         
      }
   }
}