using System;
using System.Windows.Forms;
using Laj.FileUtils;
using Laj.FileUtils.ReadWrite;

namespace Laj.BabbelFisken
{
    // Last modified: 2002-08-24
    // Version: 0.49 ID:LAJGAIS44
    // Compiles with Microsoft Visual C# .NET 7.0.9466 on Windows 95.
    // The source code is free. It is not under any kind of license.
    // If this code works, it was written by Lars Johansson, Göteborg. 
    // If not, I don't know who wrote it.

    internal class Backend
    {       
        public enum KindOfLegacyCode {Delphi, VBNET, VB6, VB6Form, VB6Class, Text, DOS, All};
        static public KindOfLegacyCode CurrentLegacyCode = KindOfLegacyCode.Delphi;

        class OpenFileDialogParameters
        {
            static public readonly string Filter = 
                "Delphi Source Code (*.pas)|*.pas|VB.NET Source Code (*.vb)|*.vb|" +
                "VB6 Source Code (*.bas)|*.bas|VB6 Form Class Code (*.frm)|*.frm|" +
                "VB6 Class Source Code (*.cls)|*.cls|" +
                "Text Files (*.txt)|*.txt|DOS-Text Files (*.*)|*.*|All Files (*.*)|*.*";
            static public string InitialDirectory = "";
            static public int FilterIndex = 1;
            private OpenFileDialogParameters() {}
        }

        class OpenFileDialogRememberThis
        {
            public string InitialDirectory = "";
            public OpenFileDialogRememberThis() {}
        }

        static OpenFileDialogRememberThis[] openFileMemory = new OpenFileDialogRememberThis[(int)KindOfLegacyCode.All+1];

        static public bool ShowOpenFileDialog(out string fileName)
        {
            fileName = "";
            OpenSaveDialogs.TheOpenFileDialog.FileName = fileName;
            OpenSaveDialogs.TheOpenFileDialog.InitialDirectory = openFileMemory[(int)CurrentLegacyCode].InitialDirectory;
            OpenSaveDialogs.TheOpenFileDialog.FilterIndex      = (int)CurrentLegacyCode +1; // The first filter is at index one.

            bool ok = (OpenSaveDialogs.TheOpenFileDialog.ShowDialog() == DialogResult.OK);
            if (!ok) return false;

            fileName = OpenSaveDialogs.TheOpenFileDialog.FileName;
            CurrentLegacyCode = (KindOfLegacyCode)OpenSaveDialogs.TheOpenFileDialog.FilterIndex -1;
            openFileMemory[(int)CurrentLegacyCode].InitialDirectory = System.IO.Directory.GetCurrentDirectory();
            return true;
        }

        static public void OpenFile(string fileName, out string[] theFileAsRows)
        {
            if (CurrentLegacyCode != KindOfLegacyCode.DOS)
                TextFile.Read(fileName, out theFileAsRows);
            else
                TextFile.Read(fileName, out theFileAsRows, 850);
        }

        static void SetDefaultOpenFileValues()
        {
            //GAIS Read a Config file ????
            foreach (KindOfLegacyCode k in Enum.GetValues(typeof(KindOfLegacyCode) ) )
            {
                openFileMemory[(int)k] = new OpenFileDialogRememberThis();
            }
        }

        class SaveFileDialogParameters
        {
            static public readonly string Filter = "C# Files (*.cs)|*.cs|" +
                "Text Files (*.txt)|*.txt|All Files (*.*)|*.*";
            private SaveFileDialogParameters() {}
        }

        static public bool ShowSaveFileDialog(string theFileAsString)
        {
            OpenSaveDialogs.TheSaveFileDialog.FileName = "";

            bool ok = (OpenSaveDialogs.TheSaveFileDialog.ShowDialog() == DialogResult.OK);
            if (!ok) return false;

            OpenSaveDialogs.TheSaveFileDialog.InitialDirectory = System.IO.Directory.GetCurrentDirectory();
            try
            {
                 TextFile.Write(OpenSaveDialogs.TheSaveFileDialog.FileName, theFileAsString);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, OpenSaveDialogs.TheSaveFileDialog.Title, 
                    MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                return false;
            }
            return true;
        }

        private Backend() {}
        static Backend()
        {
            OpenSaveDialogs.TheOpenFileDialog.Filter = OpenFileDialogParameters.Filter;
            SetDefaultOpenFileValues();
            OpenSaveDialogs.TheSaveFileDialog.Filter = SaveFileDialogParameters.Filter;
        }          
    }
}