// Copyright 2010 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Reflection;
using System.ComponentModel;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;

/// <summary>
/// Utility methods for working with parameter values, and other shared utilities in setting up
/// these custom subset evaluators.
/// </summary>

namespace SubsetNetworkEvaluators
{
  [Flags]
  public enum VarType
  {
    Empty = 0x0000,    //VT_EMPTY
    Null = 0x0001,    //VT_NULL
    Short = 0x0002,    //VT_I2
    Integer = 0x0003,  //VT_I4
    Float = 0x0004,    //VT_R4
    Double = 0x0005,  //VT_R8
    Date = 0x0007,    //VT_DATE
    String = 0x0008,    //VT_BSTR
    Bool = 0x000B,    //VT_BOOL
    ComObject = 0x000D,  //VT_UNKNOWN
    Array = 0x2000      //VT_ARRAY
  }; // enum VarType

  public class SubsetHelper
  {
    public static int FindParameter(IArray netAttributeParams, string searchName)
    {
      if (netAttributeParams == null || searchName.Length <= 0)
        return -1;

      string compareName;
      INetworkAttributeParameter netAttributeParam;
      int count = netAttributeParams.Count;
      for (int i = 0; i < count; ++i)
      {
        netAttributeParam = netAttributeParams.get_Element(i) as INetworkAttributeParameter;
        if (netAttributeParam != null)
        {
          compareName = netAttributeParam.Name;
          if (String.Compare(searchName, compareName, true) == 0)
            return i;
        }
      }

      return -1;
    }

    public static List<string> GetSourceNames(List<INetworkSource> netSources)
    {
      List<string> sourceNames = new List<string>();
      if (netSources == null)
        return sourceNames;

      foreach (INetworkSource netSource in netSources)
        sourceNames.Add(netSource.Name);

      return sourceNames;
    }

    public static List<INetworkSource> GetSourceList(IArray netSourcesArray)
    {
      List<INetworkSource> netSources = new List<INetworkSource>();
      int count = netSourcesArray.Count;
      INetworkSource netSource;
      for (int i = 0; i < count; ++i)
      {
        netSource = netSourcesArray.get_Element(i) as INetworkSource;
        if (netSource != null)
          netSources.Add(netSource);
      }
      return netSources;
    }

    public static List<INetworkSource> GetSourceList(List<INetworkSource> netSources, esriNetworkElementType eType)
    {
      List<esriNetworkElementType> eTypes = new List<esriNetworkElementType>();
      eTypes.Add(eType);
      return GetSourceList(netSources, eTypes);
    }

    public static List<INetworkSource> GetSourceList(List<INetworkSource> netSources, List<esriNetworkElementType> eTypes)
    {
      List<INetworkSource> subList = new List<INetworkSource>();
      if (netSources == null || eTypes == null)
        return subList;

      foreach (INetworkSource netSource in netSources)
      {
        foreach (esriNetworkElementType eType in eTypes)
        {
          if (netSource.ElementType == eType)
          {
            subList.Add(netSource);
            break;
          }
        }
      }
      return subList;
    }

    public static IArray RemoveAttributeByName(IArray netAttributes, string name)
    {
      return RemoveAttributesByKeyName(netAttributes, name, true);
    }

    public static IArray RemoveAttributesByPrefix(IArray netAttributes, string prefix)
    {
      return RemoveAttributesByKeyName(netAttributes, prefix, true);
    }

    public static IArray RemoveAttributesBySuffix(IArray netAttributes, string suffix)
    {
      return RemoveAttributesByKeyName(netAttributes, suffix, false);
    }

    public static IArray RemoveAttributesByKeyName(IArray netAttributes, string keyName, bool keyIsPrefix)
    {
      IArray preservedNetAttributes = new ArrayClass();

      int keyNameLen = keyName.Length;
      int netAttributeNameLen;
      INetworkAttribute netAttribute;
      string netAttributeName;
      bool isKeyAttribute;
      bool ignoreCase = true;

      int count = netAttributes.Count;
      for (int i = 0; i < count; ++i)
      {
        netAttribute = netAttributes.get_Element(i) as INetworkAttribute;
        if (netAttribute == null)
          continue;

        netAttributeName = netAttribute.Name;
        netAttributeNameLen = netAttributeName.Length;

        isKeyAttribute = false;
        if (keyNameLen == 0)
          isKeyAttribute = false;
        else if (netAttributeNameLen < keyNameLen)
          isKeyAttribute = false;
        else
        {
          int startIndex = 0;
          if (!keyIsPrefix)
            startIndex = netAttributeNameLen - keyNameLen;

          if (String.Compare(netAttributeName.Substring(startIndex, keyNameLen), keyName, ignoreCase) == 0)
            isKeyAttribute = true;
        }

        if (!isKeyAttribute)
          preservedNetAttributes.Add(netAttribute);
      }

      return preservedNetAttributes;
    }

    public static List<int> FindAttributeIndexes(IArray netAttributes, esriNetworkAttributeUsageType usage, esriNetworkAttributeDataType dataType, bool searchTimeUnits, bool ignoreDataType)
    {
      INetworkAttribute2 netAttribute = null;
      esriNetworkAttributeUnits units = esriNetworkAttributeUnits.esriNAUUnknown;
      bool isSearchUnits = false;
      bool isUnknownUnits = false;
      bool isTimeUnits = false;

      List<int> netAttributeIndexes = new List<int>();
      int count = netAttributes.Count;

      for (int i = 0; i < count; ++i)
      {
        netAttribute = netAttributes.get_Element(i) as INetworkAttribute2;
        if (netAttribute == null)
          continue;

        if (netAttribute.UsageType == usage && (ignoreDataType || netAttribute.DataType == dataType))
        {
          units = netAttribute.Units;
          isSearchUnits = false;

          if (usage != esriNetworkAttributeUsageType.esriNAUTCost)
            isSearchUnits = true;
          else
          {
            isUnknownUnits = false;
            if (units == esriNetworkAttributeUnits.esriNAUUnknown)
              isUnknownUnits = true;

            isTimeUnits = false;
            if (!isUnknownUnits)
            {
              if (units == esriNetworkAttributeUnits.esriNAUMinutes ||
                units == esriNetworkAttributeUnits.esriNAUSeconds ||
                units == esriNetworkAttributeUnits.esriNAUHours ||
                units == esriNetworkAttributeUnits.esriNAUDays)
              {
                isTimeUnits = true;
              }

              if (searchTimeUnits)
                isSearchUnits = isTimeUnits;
              else
                isSearchUnits = !isTimeUnits;
            }
          }
          if (isSearchUnits)
            netAttributeIndexes.Add(i);
        }
      }

      return netAttributeIndexes;
    }

    public static List<INetworkAttribute2> FindAttributes(IArray netAttributesArray, List<int> netAttributeIndexes)
    {
      List<INetworkAttribute2> netAttributes = new List<INetworkAttribute2>();
      foreach (int i in netAttributeIndexes)
      {
        INetworkAttribute2 netAttribute = netAttributesArray.get_Element(i) as INetworkAttribute2;
        if (netAttribute != null)
          netAttributes.Add(netAttribute);
      }

      return netAttributes;
    }

    public static void SetDefaultEvaluator(IEvaluatedNetworkAttribute netAttribute, object defaultValue, esriNetworkElementType eType)
    {
      INetworkConstantEvaluator constEvaluator = new NetworkConstantEvaluatorClass();
      constEvaluator.ConstantValue = defaultValue;
      INetworkEvaluator eval = constEvaluator as INetworkEvaluator;
      netAttribute.set_DefaultEvaluator(eType, eval);
    }

    public static void SetEvaluators(IEvaluatedNetworkAttribute netAttribute, INetworkSource netSource, Type t)
    {
      esriNetworkElementType eType = netSource.ElementType;
      if (eType == esriNetworkElementType.esriNETEdge)
      {
        SetEvaluator(netAttribute, netSource, t, esriNetworkEdgeDirection.esriNEDAlongDigitized);
        SetEvaluator(netAttribute, netSource, t, esriNetworkEdgeDirection.esriNEDAgainstDigitized);
      }
      else
      {
        SetEvaluator(netAttribute, netSource, t, esriNetworkEdgeDirection.esriNEDNone);
      }
    }

    public static void SetEvaluator(IEvaluatedNetworkAttribute netAttribute, INetworkSource netSource, Type t, esriNetworkEdgeDirection dirType)
    {
      object obj = Activator.CreateInstance(t);
      INetworkEvaluator eval = obj as INetworkEvaluator;
      netAttribute.set_Evaluator(netSource, dirType, eval);
    }
  }
}