using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;
using System.IO;
using AT.STO.UI.Win;
using VEPROMS.CSLA.Library;

namespace Volian.Controls.Library
{
	public partial class DisplayLibDocs : UserControl
	{
		#region Properties
        private DocumentInfo _CurLibDoc;
        public DocumentInfo CurLibDoc
        {
            get { return _CurLibDoc; }
            set { _CurLibDoc = value; }
        }
        // selected index into listBoxLibDocs...
        private int _SelectedLibDoc = -1;
        private DocumentInfoList _LibDocList;
        public DocumentInfoList LibDocList
        {
            get { return _LibDocList; }
            set { _LibDocList = value; }
        }
		#endregion
		#region Constructors
		public DisplayLibDocs()
		{
			InitializeComponent();
            btnOpenLibDoc.Enabled = false;
            btnDelLibDoc.Enabled = false;
		}
        DisplayTabControl _DisplayTabControl;
		#endregion
		#region LoadControlData  
		private bool _InitializingLibDocList;       // used?  see if selectionchanged event (still coding)
        public void LibDocListFillIn(DisplayTabControl tc)
		{
            _InitializingLibDocList = true;
            listBoxLibDocs.Items.Clear();
            btnSave.Enabled = false;
            btnCancel.Enabled = false;
            LibDocList = DocumentInfoList.GetLibraries(true);
            for (int i = 0; i < LibDocList.Count; i++)
                listBoxLibDocs.Items.Add(((LibDocList[i].DocumentEntries == null || LibDocList[i].DocumentEntries.Count == 0) ? "0 " : LibDocList[i].DocumentEntries.Count.ToString() + " ") + LibDocList[i].DocumentTitle); // + LibDocList[i].DocumentEntries.Count);
            _DisplayTabControl = tc;
			listBoxUsages.Items.Clear();
            _InitializingLibDocList = false;
		}
		#endregion
		#region Events
		private void listBoxLibDocs_Click(object sender, EventArgs e)
		{
            if (listBoxLibDocs.SelectedIndex == _SelectedLibDoc) return;
            _SelectedLibDoc = listBoxLibDocs.SelectedIndex;
            listBoxUsages.Items.Clear();
            tbComment.Clear();
            tbName.Clear();
            btnSave.Enabled = false;
            btnCancel.Enabled = false;
            _InitializingLibDocList = true;     // need this so textchanged code doesn't turn save/cancel buttons on.
            tbName.Text = LibDocList[_SelectedLibDoc].LibTitle;

            DocumentConfig dc = new DocumentConfig(LibDocList[_SelectedLibDoc]);
            tbComment.Text = dc.LibDoc_Comment;
            _InitializingLibDocList = false;

            // If there are no usages, then enable delete & open button (open for docs with usages occurs
            // from usage list), otherwise disable buttons & list usages
            DocumentInfo dicnt = LibDocList[_SelectedLibDoc];
            ItemInfoList iil = dicnt.LibraryDocumentUsageList;
            if (iil == null)
            {
                btnDelLibDoc.Enabled = true;
                btnOpenLibDoc.Enabled = true;
                return;
            }
            // Put the usages in the usage list for the selected library document.
            btnDelLibDoc.Enabled = false;
            btnOpenLibDoc.Enabled = false;
            DocumentInfo di = LibDocList[_SelectedLibDoc];
            foreach (ItemInfo ii in di.LibraryDocumentUsageList)
            {
                listBoxUsages.Items.Add(ii.MyProcedure.ToString() + " - " + ii.MyContent.Number + " " + ii.MyContent.Text);
            }
		}
		private void btnDelLibDoc_Click(object sender, EventArgs e)
		{
            DocumentInfo di = LibDocList[_SelectedLibDoc];
            
            try
            {
                Document.Delete(di.DocID);
            }
            catch (Exception ex)
            {
                Console.WriteLine("error deleting doc = " + ex.Message);
            }
            LibDocListFillIn(_DisplayTabControl);
		}
        private void btnSave_Click(object sender, EventArgs e)
        {
            bool chg = false;
            DocumentInfo di = LibDocList[_SelectedLibDoc];
            Document doc = Document.Get(di.DocID);
            if (tbName.Text != LibDocList[_SelectedLibDoc].LibTitle)
            {
                chg = true;
                doc.LibTitle = tbName.Text;
            }
            DocumentConfig dc = new DocumentConfig(LibDocList[_SelectedLibDoc]);
            if (tbComment.Text != dc.LibDoc_Comment)
            {
                chg = true;
                dc.LibDoc_Comment = tbComment.Text;
                doc.Config = dc.ToString();
            }
            if (chg == true)
            {
                doc.Save();
                LibDocListFillIn(_DisplayTabControl);
            }
        }
        private void btnCancel_Click(object sender, EventArgs e)
        {
            DocumentInfo di = LibDocList[_SelectedLibDoc];
            Document doc = Document.Get(di.DocID);
            tbName.Text = doc.LibTitle;
            DocumentConfig dc = new DocumentConfig(LibDocList[_SelectedLibDoc]);
            tbComment.Text = dc.LibDoc_Comment;
            btnSave.Enabled = false;
            btnCancel.Enabled = false;
        }

        private void btnOpenLibDoc_Click(object sender, EventArgs e)
        {
            DocumentInfo di = LibDocList[_SelectedLibDoc];
            _DisplayTabControl.OpenDSOTabPage(di);
        }

        private void tbName_TextChanged(object sender, EventArgs e)
        {
            if (_InitializingLibDocList) return;
            btnSave.Enabled = true;
            btnCancel.Enabled = true;
        }

        private void tbComment_TextChanged(object sender, EventArgs e)
        {
            if (_InitializingLibDocList) return;
            btnSave.Enabled = true;
            btnCancel.Enabled = true;
        }
        

        private void btnImpLibDoc_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog();

            openFileDialog1.InitialDirectory = "c:\\";
            openFileDialog1.Filter = "Word files (*.doc;*.rtf)|*.doc;*.rtf|All files (*.*)|*.*";
            openFileDialog1.FilterIndex = 0;
            openFileDialog1.RestoreDirectory = true;

            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                int done = 0;
                int ntry = 0;
                while (done == 0 && ntry < 4)
                {
                    ntry++;
                    done = SaveTheDoc(openFileDialog1.FileName, openFileDialog1.SafeFileName.Substring(0,openFileDialog1.SafeFileName.LastIndexOf(".")));
                }
                if (done > 0)
                {
                    LibDocListFillIn(_DisplayTabControl);
                    // set selectedindex to the imported doc...
                    int indx = 0;
                    DocumentInfoList dil = DocumentInfoList.GetLibraries(true);
                    for(int i = 0; i<listBoxLibDocs.Items.Count; i++)
                    {
                        if (dil[i].DocID == done)
                        {
                            indx = i;
                            break;
                        }
                    }
                    listBoxLibDocs.SelectedIndex = indx;
                }
            }
        }
        private int SaveTheDoc(string temppath, string title)
        {
            try
            {
                FileStream fs = File.Open(temppath, FileMode.Open, FileAccess.Read, FileShare.None);
                long len = fs.Length + 1;
                byte[] ByteArray = new byte[len];
                int nBytesRead = fs.Read(ByteArray, 0, (int)len);
                fs.Close();
                string t1 = (title == null || title == "") ? null : title;
                Document doc = Document.MakeDocument(t1, ByteArray, null, null); //, DateTime.Now, "Migration");
                return doc.DocID;
            }
            // for an io exception, keep trying
            catch (IOException)
            {
                Wait(2);
                return 0;
            }
            catch (Exception ex)
            {
                MessageBox.Show(string.Format("Could not save the document, {0}, {1}", ex.Message, ex.InnerException));
                return -1;
            }

        }
        private void Wait(int n)
        {
            DateTime dtw = DateTime.Now.AddSeconds(n);
            while (DateTime.Now < dtw)
            {
                Application.DoEvents();
            }
        }
        private void listBoxUsages_SelectedValueChanged(object sender, EventArgs e)
        {
            if (!_InitializingLibDocList)
            {
                if (listBoxUsages.SelectedIndex == -1) return;
                DocumentInfo di = LibDocList[listBoxLibDocs.SelectedIndex];
                // see if the library document actually has data - data migration may have created a 'null' content within the
                // record for missing library documents.
                if (di.DocContent == null)
                {
                    MessageBox.Show("No Content in this document");
                    return;
                }
                MessageBox.Show("WARNING: All edits made to this Library Document will be applied to all uses of the Document");
                _DisplayTabControl.OpenItem(di.LibraryDocumentUsageList[listBoxUsages.SelectedIndex]);
            }
        }
        #endregion
    }
}