using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
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 Microsoft.Win32;
using System.Xml.Linq;
using System.Diagnostics;

namespace HradlovaSit
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        OpenFileDialog ofdSit, ofdIn;
        Mode mode;
        public static Net net;

        public Window1()
        {
            InitializeComponent();
            ofdSit = new OpenFileDialog();
            ofdSit.Title = "Vyberte soubor s popisem sítě v XML";

            ofdIn = new OpenFileDialog();
            ofdIn.Title = "Vyberte soubor se vstupem.";
            mode = Mode.Evaluate;

        }

        public static void LoadFromXML(string path)
        {
                XDocument doc = XDocument.Load(path);
                var elem = (from c in doc.Descendants()
                            where c.NodeType == System.Xml.XmlNodeType.Element && c.Name.LocalName.ToLower() == "net"
                            select c).First();
                net = new Net();
                if (!net.LoadFromXML(elem)) throw new Exception();

            
        }

        private void SaveToXML(string path)
        {

        }

        private void Edit_Checked(object sender, RoutedEventArgs e)
        {
            if (this.InteractiveMode == null) return;
            this.InteractiveMode.IsChecked = false;
            this.EvaluateMode.IsChecked = false;
            this.mode = Mode.Edit;
        }

        private void Interactive_Checked(object sender, RoutedEventArgs e)
        {
            if (this.InteractiveMode == null) return;
            this.EditMode.IsChecked = false;
            this.EvaluateMode.IsChecked = false;
            this.mode = Mode.Interactive;

        }

        private void Evaluate_Checked(object sender, RoutedEventArgs e)
        {
            if (this.InteractiveMode == null) return;
            this.InteractiveMode.IsChecked = false;
            this.EditMode.IsChecked = false;
            this.mode = Mode.Evaluate;

        }

        private void Close_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }

        private void Draw()
        {

        }

        private void Open_Click(object sender, RoutedEventArgs e)
        {
            if (ofdSit.ShowDialog().Value)
            {
                if (mode == Mode.Edit || ofdIn.ShowDialog().Value)
                {
                    try
                    {
                        LoadFromXML(ofdSit.FileName);
                    }
                    catch (Exception)
                    {
                        MessageBox.Show("Nepodařilo se otevřít soubor s popisem.", "Chyba", MessageBoxButton.OK, MessageBoxImage.Error);
                        return;
                    }
                        if (mode != Mode.Edit) Evaluate(ofdIn.FileName, true);
                }
            }
        }

        public static string Evaluate(string inFile, bool showOutput)
        {
            StreamReader sr = null; StreamWriter sw = null;
            try
            {
                sr = File.OpenText(inFile);
                string outfile = inFile;
                if (outfile.Contains(".in"))
                {
                    outfile = outfile.Replace(".in", ".out");
                }
                try
                {
                    sw = File.CreateText(outfile);
                }
                catch (Exception)
                {
                    outfile = "C:" + outfile.Substring(outfile.LastIndexOf('\\'));
                    sw = File.CreateText(outfile);
                }
                string line;
                while (!sr.EndOfStream && (line = sr.ReadLine()) != null)
                {
                    if (net.InsertInputs(line.Trim()))
                    {
                        if (net.Evaluate())
                        {
                            sw.WriteLine(net.OutputsToString());
                        }
                        else MessageBox.Show("Při vyhodnocování nastala chyba.", "Chyba", MessageBoxButton.OK, MessageBoxImage.Error);
                    }
                    else MessageBox.Show("Špatný formát souboru se vstupními daty.", "Chyba", MessageBoxButton.OK, MessageBoxImage.Error);
                }
                if(showOutput) Process.Start(outfile);
                return outfile;
            }
            catch (Exception)
            {
                MessageBox.Show("Nepodařilo se otevřít soubor(y).", "Chyba", MessageBoxButton.OK, MessageBoxImage.Error);
                return null;
            }
            finally
            {
                if (sw != null) sw.Close();
                if (sr != null) sr.Close();
            }
        }

        public enum Mode
        {
            Evaluate, Interactive, Edit
        }
    }
}