using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;

using CLIPSNET;

namespace WineWPFExample
  {
   public partial class MainWindow : Window
     {
      private class WineRecommendation 
        {
         public string WineName { get; set; }
         public int Certainty { get; set; }
         public string CertaintyText { get; set; }
         public string CertaintyWidthTaken { get; set; }
         public string CertaintyWidthLeft { get; set; }
        }

      String [] preferredColorNames = { "Don't Care", "Red", "White" };
      String [] preferredBodyNames = { "Don't Care", "Light", "Medium", "Full" };
      String [] preferredSweetnessNames = { "Don't Care", "Dry", "Medium", "Sweet" };

      String [] mainCourseNames = { "Don't Know", "Beef", "Pork", "Lamb", "Turkey", "Chicken", "Duck", "Fish", "Other" };
      String [] sauceNames = { "Don't Know", "None", "Spicy", "Sweet", "Cream", "Other" };
      String [] flavorNames = { "Don't Know", "Delicate", "Average", "Strong" };

      String [] preferredColorChoices;
      String [] preferredBodyChoices;
      String [] preferredSweetnessChoices;

      String [] mainCourseChoices;
      String [] sauceChoices;
      String [] flavorChoices;

      private CLIPSNET.Environment clips;
      private bool formLoaded = false;

      public MainWindow()
        {
         Dispatcher.BeginInvoke(DispatcherPriority.Loaded, new Action(() => { OnLoad(); } ));
         InitializeComponent();
         clips = new CLIPSNET.Environment();
         clips.LoadFromResource("WineWPFExample","WineWPFExample.wine.clp");
        }

      private String [] GenerateChoices(
        String [] names)
        {
         String [] choices = new String[names.Count()];

         for (int i = 0; i < names.Count(); i++)
           { choices[i] = names[i]; }

         return choices;
        }

      private void OnLoad()
        {
         RunWine();
         formLoaded = true;       
        }
 
      private void ColorComboBox_Loaded(object sender, RoutedEventArgs e)
	    {
         preferredColorChoices = GenerateChoices(preferredColorNames);

         var colorComboBox = sender as ComboBox;

         colorComboBox.ItemsSource = preferredColorChoices;

	     colorComboBox.SelectedIndex = 0;
	    }

      private void BodyComboBox_Loaded(object sender, RoutedEventArgs e)
	    {
         preferredBodyChoices = GenerateChoices(preferredBodyNames);

         var bodyComboBox = sender as ComboBox;

         bodyComboBox.ItemsSource = preferredBodyChoices;

	     bodyComboBox.SelectedIndex = 0;
	    }

      private void SweetnessComboBox_Loaded(object sender, RoutedEventArgs e)
	    {
         preferredSweetnessChoices = GenerateChoices(preferredSweetnessNames);

         var sweetnessComboBox = sender as ComboBox;

         sweetnessComboBox.ItemsSource = preferredSweetnessChoices;

	     sweetnessComboBox.SelectedIndex = 0;
	    }

      private void MainCourseComboBox_Loaded(object sender, RoutedEventArgs e)
	    {
         mainCourseChoices = GenerateChoices(mainCourseNames);

         var mainCourseComboBox = sender as ComboBox;

         mainCourseComboBox.ItemsSource = mainCourseChoices;

	     mainCourseComboBox.SelectedIndex = 0;
	    }

      private void SauceComboBox_Loaded(object sender, RoutedEventArgs e)
	    {
         sauceChoices = GenerateChoices(sauceNames);

         var sauceComboBox = sender as ComboBox;

         sauceComboBox.ItemsSource = sauceChoices;

	     sauceComboBox.SelectedIndex = 0;
	    }

      private void FlavorComboBox_Loaded(object sender, RoutedEventArgs e)
	    {
         flavorChoices = GenerateChoices(flavorNames);

         var flavorComboBox = sender as ComboBox;

         flavorComboBox.ItemsSource = flavorChoices;

         flavorComboBox.SelectedIndex = 0;
	    }

      private void OnChange(object sender, SelectionChangedEventArgs e)
        {
         if (formLoaded)
           { RunWine(); }
        }

      private void RunWine()
        {
         clips.Reset();

         string item = (string) colorComboBox.SelectedValue;

         if (item.Equals("Red")) 
           { clips.AssertString("(attribute (name preferred-color) (value red))"); }
         else if (item.Equals("White"))
           { clips.AssertString("(attribute (name preferred-color) (value white))"); } 
         else
           { clips.AssertString("(attribute (name preferred-color) (value unknown))"); }

         item = (string) bodyComboBox.SelectedValue;

         if (item.Equals("Light")) 
           { clips.AssertString("(attribute (name preferred-body) (value light))"); } 
         else if (item.Equals("Medium")) 
           { clips.AssertString("(attribute (name preferred-body) (value medium))"); }
         else if (item.Equals("Full"))
           { clips.AssertString("(attribute (name preferred-body) (value full))"); } 
         else
           { clips.AssertString("(attribute (name preferred-body) (value unknown))"); }

         item = (string) sweetnessComboBox.SelectedValue;
         
         if (item.Equals("Dry")) 
           { clips.AssertString("(attribute (name preferred-sweetness) (value dry))"); } 
         else if (item.Equals("Medium")) 
           { clips.AssertString("(attribute (name preferred-sweetness) (value medium))"); } 
         else if (item.Equals("Sweet")) 
           { clips.AssertString("(attribute (name preferred-sweetness) (value sweet))"); } 
         else 
           { clips.AssertString("(attribute (name preferred-sweetness) (value unknown))"); }

         item = (string) mainCourseComboBox.SelectedValue;

         if (item.Equals("Beef") ||
             item.Equals("Pork") ||
             item.Equals("Lamb")) 
           {
            clips.AssertString("(attribute (name main-component) (value meat))");
            clips.AssertString("(attribute (name has-turkey) (value no))");
           }
         else if (item.Equals("Turkey"))
           {
            clips.AssertString("(attribute (name main-component) (value poultry))");
            clips.AssertString("(attribute (name has-turkey) (value yes))");
           }
         else if (item.Equals("Chicken") ||
                  item.Equals("Duck"))
           {
            clips.AssertString("(attribute (name main-component) (value poultry))");
            clips.AssertString("(attribute (name has-turkey) (value no))");
           } 
         else if (item.Equals("Fish")) 
           {
            clips.AssertString("(attribute (name main-component) (value fish))");
            clips.AssertString("(attribute (name has-turkey) (value no))");
           } 
         else if (item.Equals("Other")) 
           {
            clips.AssertString("(attribute (name main-component) (value unknown))");
            clips.AssertString("(attribute (name has-turkey) (value no))");
           }
         else
           {
            clips.AssertString("(attribute (name main-component) (value unknown))");
            clips.AssertString("(attribute (name has-turkey) (value unknown))");
           }

         item = (string) sauceComboBox.SelectedValue;

         if (item.Equals("None")) 
           { clips.AssertString("(attribute (name has-sauce) (value no))"); } 
         else if (item.Equals("Spicy")) 
           {
            clips.AssertString("(attribute (name has-sauce) (value yes))");
            clips.AssertString("(attribute (name sauce) (value spicy))");
           }
         else if (item.Equals("Sweet"))
           {
            clips.AssertString("(attribute (name has-sauce) (value yes))");
            clips.AssertString("(attribute (name sauce) (value sweet))");
           }
         else if (item.Equals("Cream"))
           {
            clips.AssertString("(attribute (name has-sauce) (value yes))");
            clips.AssertString("(attribute (name sauce) (value cream))");
           }
         else if (item.Equals("Other"))
           {
            clips.AssertString("(attribute (name has-sauce) (value yes))");
            clips.AssertString("(attribute (name sauce) (value unknown))");
           }
         else
           {
            clips.AssertString("(attribute (name has-sauce) (value unknown))");
            clips.AssertString("(attribute (name sauce) (value unknown))");
           }

         item = (string) flavorComboBox.SelectedValue;
         if (item.Equals("Delicate")) 
           { clips.AssertString("(attribute (name tastiness) (value delicate))"); } 
         else if (item.Equals("Average")) 
           { clips.AssertString("(attribute (name tastiness) (value average))"); } 
         else if (item.Equals("Strong")) 
           { clips.AssertString("(attribute (name tastiness) (value strong))"); } 
         else 
           { clips.AssertString("(attribute (name tastiness) (value unknown))"); }

         clips.Run();

         UpdateWines();
        }

      private void UpdateWines() 
        {
         string evalStr = "(WINES::get-wine-list)";
         List<WineRecommendation> wineList = new List<WineRecommendation>();

         foreach (FactAddressValue fv in clips.Eval(evalStr) as MultifieldValue)
           {
            int certainty = (int) (((NumberValue) fv["certainty"]));

            String wineName = ((LexemeValue) fv["value"]).Value;

            wineList.Add(new WineRecommendation() 
                                { WineName = wineName, 
                                  Certainty = certainty, 
                                  CertaintyText = certainty + "%",
                                  CertaintyWidthTaken = certainty + "*",
                                  CertaintyWidthLeft = (100 - certainty) + "*"
                                });
           }

         resultsDataGridView.ItemsSource = wineList;
        }
     }
  }