#region Using Directives

using System;
using System.Globalization;
using System.IO;
using System.Windows.Forms;
using ScintillaNET;
using WeifenLuo.WinFormsUI.Docking;

#endregion Using Directives


namespace SCide
{
    internal sealed partial class DocumentForm : DockContent
    {
        #region Fields

        private string _filePath;
        
        // Indicates that calls to the StyleNeeded event
        // should use the custom INI lexer
        private bool _iniLexer;

        #endregion Fields


        #region Methods

        private void AddOrRemoveAsteric()
        {
            if (scintilla.Modified)
            {
                if (!Text.EndsWith(" *"))
                    Text += " *";
            }
            else
            {
                if (Text.EndsWith(" *"))
                    Text = Text.Substring(0, Text.Length - 2);
            }
        }


        private void DocumentForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (Scintilla.Modified)
            {
                // Prompt if not saved
                string message = String.Format(
                    CultureInfo.CurrentCulture,
                    "The _text in the {0} file has changed.{1}{2}Do you want to save the changes?",
                    Text.TrimEnd(' ', '*'),
                    Environment.NewLine,
                    Environment.NewLine);

                DialogResult dr = MessageBox.Show(this, message, Program.Title, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Exclamation);
                if (dr == DialogResult.Cancel)
                {
                    // Stop closing
                    e.Cancel = true;
                    return;
                }
                else if (dr == DialogResult.Yes)
                {
                    // Try to save before closing
                    e.Cancel = !Save();
                    return;
                }
            }

            // Close as normal
        }


        public bool ExportAsHtml()
        {
            using (SaveFileDialog dialog = new SaveFileDialog())
            {
                string fileName = (Text.EndsWith(" *") ? Text.Substring(0, Text.Length - 2) : Text);
                dialog.Filter = "HTML Files (*.html;*.htm)|*.html;*.htm|All Files (*.*)|*.*";
                dialog.FileName = fileName + ".html";
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    scintilla.Lexing.Colorize(); // Make sure the document is current
                    using (StreamWriter sw = new StreamWriter(dialog.FileName))
                        scintilla.ExportHtml(sw, fileName, false);

                    return true;
                }
            }

            return false;
        }


        public bool Save()
        {
            if (String.IsNullOrEmpty(_filePath))
                return SaveAs();

            return Save(_filePath);
        }


        public bool Save(string filePath)
        {
            using (FileStream fs = File.Create(filePath))
            using (BinaryWriter bw = new BinaryWriter(fs))
                bw.Write(scintilla.RawText, 0, scintilla.RawText.Length - 1); // Omit trailing NULL

            scintilla.Modified = false;
            return true;
        }


        public bool SaveAs()
        {
            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                _filePath = saveFileDialog.FileName;
                return Save(_filePath);
            }

            return false;
        }


        private void scintilla_ModifiedChanged(object sender, EventArgs e)
        {
            AddOrRemoveAsteric();
        }


        private void scintilla_StyleNeeded(object sender, StyleNeededEventArgs e)
        {
            // Style the _text
            if (_iniLexer)
                SCide.IniLexer.StyleNeeded((Scintilla)sender, e.Range);
        }

        #endregion Methods


        #region Properties

        public string FilePath
        {
            get { return _filePath; }
            set { _filePath = value; }
        }


        public bool IniLexer
        {
            get { return _iniLexer; }
            set { _iniLexer = value; }
        }


        public Scintilla Scintilla
        {
            get
            {
                return scintilla;
            }
        }

        #endregion Properties


        #region Constructors

        public DocumentForm()
        {
            InitializeComponent();
        }

        #endregion Constructors
    }
}