using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using TradeIdeas.XML;
using System.IO;

namespace TradeIdeas.TIProGUI
{
    public partial class EditSymbolListDialog : Form
    {
        private List<XmlNode> _phrases;
        private string _fileNameSaved;
        private string _fileNameLoaded;
        //private XmlNode _commonPhrases;

        //Fonts
        private FontManager _fontManager;
        private const float DEFAULT_FONT_SIZE = 8.25F;
        public EditSymbolListDialog(HashSet<string> symbols, bool viewOnly = false)
        {
            InitializeComponent();
            Icon = GuiEnvironment.Icon;
            SetSymbols(symbols);
            _phrases = GuiEnvironment.XmlConfig.Node("EDIT_SYMBOL_LIST").Node("PHRASES");
            //_commonPhrases = GuiEnvironment.XmlConfig.Node("COMMON_PHRASES");
            CultureChanged();
            if (viewOnly)
                SetViewOnlyMode();
            _fontManager = new FontManager(this, DEFAULT_FONT_SIZE);
            _fontManager.selectTheFont();
        }
        private void SetViewOnlyMode()
        {
            loadButton.Enabled = false;
            insertButton.Enabled = false;
            symbolsTextBox.ReadOnly = true;
            Text = Text + " - View Only Mode";
        }
        private void CultureChanged()
        {
            Text = _phrases.Node("WINDOW_TITLE").PropertyForCulture("TEXT", "***");
            okButton.Text = _phrases.Node("OK").PropertyForCulture("TEXT", "***");
            cancelButton.Text = _phrases.Node("CANCEL").PropertyForCulture("TEXT", "***");
            loadButton.Text = _phrases.Node("LOAD_FROM_FILE").PropertyForCulture("TEXT", "***");
            insertButton.Text = _phrases.Node("INSERT_FROM_FILE").PropertyForCulture("TEXT", "***");
            saveButton.Text = _phrases.Node("SAVE_TO_FILE").PropertyForCulture("TEXT", "***");
        }
        public string[] Lines
        {
            get { return symbolsTextBox.Lines; }
        }
        // Without this it selects all the text in the textBox by default because it
        // is the first control and automatically receives focus.
        protected override void OnShown( EventArgs e )
        {
            symbolsTextBox.SelectionLength = 0;
            base.OnShown( e );
        }
        private void SetSymbols(HashSet<string> symbols)
        {
            // Make sure we don't have the empty string
            symbols.Remove("");
            string[] newLines = new string[symbols.Count];
            symbols.CopyTo(newLines);
            Array.Sort(newLines);
            symbolsTextBox.Lines = newLines;
        }
        private void AddSymbolsFromFileDialog(HashSet<string> symbols)
        {
            using (OpenFileDialog fileDialog = new OpenFileDialog())
            {
                fileDialog.Filter = _phrases.Node("TEXT_FILES_FILTER").PropertyForCulture("TEXT", "***") + "|*.txt";

                fileDialog.FileName = FileNameMethod.QuoteFileName(_fileNameLoaded);

                DialogResult result = fileDialog.ShowDialog();
                if (result == DialogResult.OK)
                {
                    try
                    {                       
                        string[] text = File.ReadAllLines(fileDialog.FileName);       
                        foreach (string symbol in text)
                        {
                            if (symbol.Length > 0)
                                symbols.Add(symbol);
                        }
                        _fileNameLoaded = Path.GetFileName(fileDialog.FileName);
                    }
                    catch (IOException ex)
                    {
                        MessageBox.Show(ex.Message,
                                        _phrases.Node("ERROR_READING_FILE").PropertyForCulture("TEXT", "***"),
                                        MessageBoxButtons.OK,
                                        MessageBoxIcon.Error,
                                        MessageBoxDefaultButton.Button1);
                    }
                }
            }
        }
        private void insertButton_Click(object sender, EventArgs e)
        {
            HashSet<string> allSymbols = new HashSet<string>(symbolsTextBox.Lines);
            AddSymbolsFromFileDialog(allSymbols);
            SetSymbols(allSymbols);
        }

        private void loadButton_Click(object sender, EventArgs e)
        {
            HashSet<string> newSymbols = new HashSet<string>();
            AddSymbolsFromFileDialog(newSymbols);
            SetSymbols(newSymbols);
        }

        private void saveButton_Click(object sender, EventArgs e)
        {
            using (SaveFileDialog fileDialog = new SaveFileDialog())
            {
                fileDialog.Filter = _phrases.Node("TEXT_FILES_FILTER").PropertyForCulture("TEXT", "***") + "|*.txt";

                string fileName = "";
                if (_fileNameSaved == null)
                {
                    fileName = Text;  // No file prefix required since title is static.
                }
                else
                {
                    fileName = _fileNameSaved;
                }
                fileDialog.FileName = FileNameMethod.QuoteFileName(fileName);

                DialogResult result = fileDialog.ShowDialog();                
                if (result == DialogResult.OK)
                {                    
                    try
                    {
                        using (StreamWriter file = File.CreateText(fileDialog.FileName))
                        {
                            // Remove duplicates and re-sort before saving.
                            HashSet<string> symbols = new HashSet<string>(symbolsTextBox.Lines);
                            SetSymbols(symbols);

                            foreach (string symbol in symbolsTextBox.Lines)
                            {
                                file.WriteLine(symbol.Trim());
                            }
                        }
                        _fileNameSaved = Path.GetFileName(fileDialog.FileName);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message,
                                         _phrases.Node("ERROR_READING_FILE").PropertyForCulture("TEXT", "***"),
                                        MessageBoxButtons.OK,
                                        MessageBoxIcon.Error,
                                        MessageBoxDefaultButton.Button1);
                    }
                }
            }
        }

        private void symbolsTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            // This is needed since textbox MultiLine is true causes the Ctrl-A Select All to stop working.
            if (e.Control && e.KeyCode == Keys.A)
            {
                symbolsTextBox.SelectAll();
                e.SuppressKeyPress = true; // Suppress ding
            }
         }
    }
}