// 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.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;


namespace RSSWeatherLayer
{
  /// <summary>
  /// Add a new weather item given a zipCode.
  /// </summary>
  /// <remarks>Should the weather item exist, it will be updated</remarks>
  [ClassInterface(ClassInterfaceType.None)]
  [Guid("D19CA1E0-FC77-4d2a-8FAA-EC74683FA991")]
  [ProgId("RSSWeatherLayer.AddWeatherItemCmd")]
  [ComVisible(true)]
  public sealed class AddWeatherItemCmd: BaseCommand
  {
    #region COM Registration Function(s)
    [ComRegisterFunction()]
    [ComVisible(false)]
    static void RegisterFunction(Type registerType)
    {
      // Required for ArcGIS Component Category Registrar support
      ArcGISCategoryRegistration(registerType);

      //
      // TODO: Add any COM registration code here
      //
    }

    [ComUnregisterFunction()]
    [ComVisible(false)]
    static void UnregisterFunction(Type registerType)
    {
      // Required for ArcGIS Component Category Registrar support
      ArcGISCategoryUnregistration(registerType);

      //
      // TODO: Add any COM unregistration code here
      //
    }

    #region ArcGIS Component Category Registrar generated code
    /// <summary>
    /// Required method for ArcGIS Component Category registration -
    /// Do not modify the contents of this method with the code editor.
    /// </summary>
    private static void ArcGISCategoryRegistration(Type registerType)
    {
      string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
      MxCommands.Register(regKey);
      ControlsCommands.Register(regKey);
    }
    /// <summary>
    /// Required method for ArcGIS Component Category unregistration -
    /// Do not modify the contents of this method with the code editor.
    /// </summary>
    private static void ArcGISCategoryUnregistration(Type registerType)
    {
      string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
      MxCommands.Unregister(regKey);
      ControlsCommands.Unregister(regKey);
    }

    #endregion
    #endregion

    //class members
    private IHookHelper               m_hookHelper = null;
    private RSSWeatherLayerClass      m_weatherLayer    = null;

    /// <summary>
    /// CTor
    /// </summary>
    public AddWeatherItemCmd()
    {
      base.m_category = "Weather";
      base.m_caption = "Add Weather item by zipcode";
      base.m_message = "Add weather item by zipcode";
      base.m_toolTip = "Add by zipcode";
      base.m_name = base.m_category + "_" + base.m_caption;

      try
      {
        base.m_bitmap = new Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "AddWeatherItemCmd.bmp"));
      }
      catch (Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap");
      }
    }

    #region Overriden Class Methods

    /// <summary>
    /// Occurs when this command is created
    /// </summary>
    /// <param name="hook">Instance of the application</param>
    public override void OnCreate(object hook)
    {
      //Instantiate the hook helper
      if (m_hookHelper == null)
        m_hookHelper = new HookHelperClass();

      //set the hook
      m_hookHelper.Hook = hook;
    }

    /// <summary>
    /// Occurs when this command is clicked
    /// </summary>
    public override void OnClick()
    {
      try
      {
        if (0 == m_hookHelper.FocusMap.LayerCount)
          return;

        //get the weather layer
        IEnumLayer layers = m_hookHelper.FocusMap.get_Layers(null, false);
        layers.Reset();
        ILayer layer = layers.Next();
        while(layer != null)
        {
          if(layer is RSSWeatherLayerClass)
          {
            m_weatherLayer = (RSSWeatherLayerClass)layer;
            break;
          }
          layer = layers.Next();
        }

        //in case that the layer exists
        if(null != m_weatherLayer)
        {
          //launch the zipCode input dialog
          ZipCodeDlg dlg = new ZipCodeDlg();
          if(DialogResult.OK == dlg.ShowDialog())
          {
            long zipCode = dlg.ZipCode;
            if(0 != zipCode)
            {
              //add the weather item to the layer
              m_weatherLayer.AddItem(zipCode);    

              //if the user checked the 'ZoomTo' checkbox, zoom to the item
              if(dlg.ZoomToItem)
              {
                m_weatherLayer.ZoomTo(zipCode);
              }
            }
          }
        }
      }
      catch(Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message);
      }
    }

    #endregion
  }
}