Imports System.IO
Imports EgtUILib

Public Class SaveFileDialogWithListVM
   Inherits VMBase

   Private m_Title As String
   Public Property Title As String
      Get
         If IsNothing(m_Title) Then
            If IsFolder Then
               Return EgtMsg(MSG_EGTSAVEFILEDIALOG + 11)
            Else
               Return EgtMsg(MSG_EGTSAVEFILEDIALOG + 10)
            End If
         Else
            Return m_Title
         End If
      End Get
      Set(value As String)
         m_Title = value
      End Set
   End Property
   Private m_sDirectory As String
   Public Property Directory As String
      Get
         Return m_sDirectory
      End Get
      Set(value As String)
         m_sDirectory = value
      End Set
   End Property

   Private m_sExtension As String = String.Empty
   Public Property Extension As String
      Get
         Return m_sExtension
      End Get
      Set(value As String)
         m_sExtension = value
      End Set
   End Property

   Private m_FileName As String
   Public Property FileName As String
      Get
         Return m_FileName
      End Get
      Set(value As String)
         m_FileName = value
      End Set
   End Property

   Private m_IsFolder As Boolean = False
   Public Property IsFolder As Boolean
      Get
         Return m_IsFolder
      End Get
      Set(value As Boolean)
         m_IsFolder = value
      End Set
   End Property

   Private m_WriteFileName As String
   Public Property WriteFileName As String
      Get
         Return m_WriteFileName
      End Get
      Set(value As String)
         Dim TempName As String = value
         For Each cInvalid In Path.GetInvalidFileNameChars()
            TempName = TempName.Replace(cInvalid, "")
         Next
         If TempName.Length = value.Length Then
            m_WriteFileName = value
         Else
            MessageBox.Show(EgtMsg(MSG_MACHININGDBERRORS + 4),
                            EgtMsg(MSG_EGTSAVEFILEDIALOG + 7),
                            MessageBoxButton.OK, MessageBoxImage.Error)
         End If
         NotifyPropertyChanged("WriteFileName")
      End Set
   End Property

   Private m_sFilter As String
   Public Property Filter As String
      Get
         Return m_sFilter
      End Get
      Set(value As String)
         m_sFilter = value
      End Set
   End Property

   Private m_sFileNameFilter As Predicate(Of String)
   Public Property FileNameFilter As Predicate(Of String)
      Get
         Return m_sFileNameFilter
      End Get
      Set(value As Predicate(Of String))
         m_sFileNameFilter = value
      End Set
   End Property

   Private m_sExtensions As New List(Of String)
   Public ReadOnly Property Extensions As List(Of String)
      Get
         Return m_sExtensions
      End Get
   End Property

   Private m_FileList As New List(Of String)
   Public Property FileList As List(Of String)
      Get
         Return m_FileList
      End Get
      Set(value As List(Of String))
         m_FileList = value
         NotifyPropertyChanged("FileList")
      End Set
   End Property

   Private m_SelectedFile As String
   Public Property SelectedFile As String
      Get
         Return m_SelectedFile
      End Get
      Set(value As String)
         m_SelectedFile = value
         NotifyPropertyChanged("SelectedFile")

         If Not IsNothing(m_SelectedFile) Then
            m_WriteFileName = Path.GetFileNameWithoutExtension(SelectedFile)
            NotifyPropertyChanged("WriteFileName")
         End If
      End Set
   End Property

#Region "Messages"

   Public ReadOnly Property SaveMsg As String
      Get
         Return EgtMsg(MSG_EGTSAVEFILEDIALOG + 1)
      End Get
   End Property
   Public ReadOnly Property CancelMsg As String
      Get
         Return EgtMsg(MSG_EGTSAVEFILEDIALOG + 2)
      End Get
   End Property

#End Region

   Public Sub Initialize()
      ' se la cartella d'origine non è stata impostata, esco
      If String.IsNullOrWhiteSpace(m_sDirectory) Then
         Throw New Exception("Exception: Directory is null or white space!")
      End If
      ' se non esiste, esco
      If Not IO.Directory.Exists(m_sDirectory) Then
         Throw New Exception("Exception: Directory doesn't exist!")
      End If
      If String.IsNullOrWhiteSpace(m_sExtension) And Not IsFolder Then
         Throw New Exception("Exception: Extension is null or white space!")
      End If
      ' verifico se è impostato un nome di default
      If Not String.IsNullOrWhiteSpace(m_FileName) Then
         m_WriteFileName = m_FileName
      End If
      NotifyPropertyChanged("WriteFileName")
      If IsFolder Then m_sExtension = ""
      ' inizializzo la ListBox
      InitializeListBox()
   End Sub

   Public Function InitializeListBox() As Boolean?
      ' se esiste la stringa filtro estensioni
      If Not IsNothing(m_sFilter) Then
         ' creo la lista delle estensioni da considerare
         m_sFilter = m_sFilter.ToLower
         m_sFilter = m_sFilter.Replace("*", "")
         m_sExtensions = New List(Of String)(m_sFilter.Split(","c))
         For Index = m_sExtensions.Count - 1 To 0 Step -1
            If Not Path.HasExtension(m_sExtensions(Index)) Then
               m_sExtensions.RemoveAt(Index)
            End If
         Next
      End If
      ' leggo i file che contiene
      Dim AllFilesInDir() As String = IO.Directory.GetFiles(m_sDirectory)
      'Dim AllVerifiedFilesInDir As New List(Of String)
      For FileIndex = 0 To AllFilesInDir.Count - 1
         Dim CurrFile As String = AllFilesInDir(FileIndex)
         ' se esistono delle estensioni da verificare
         If m_sExtensions.Count > 0 Then
            ' verifico se ha una delle estensioni ricercate
            For ExtIndex = 0 To m_sExtensions.Count - 1
               If Path.GetExtension(CurrFile).ToLower = m_sExtensions(ExtIndex).ToLower Then
                  ' verifico se esiste la regola del filtro generico
                  If Not IsNothing(m_sFileNameFilter) Then
                     ' verifico che la regola del filtro generico sia rispettata
                     If m_sFileNameFilter(CurrFile) Then
                        ' aggiungo il file alla lista
                        m_FileList.Add(AllFilesInDir(FileIndex))
                     End If
                  Else
                     ' aggiungo il file alla lista
                     m_FileList.Add(AllFilesInDir(FileIndex))
                  End If

                  Exit For
               End If
            Next
         Else
            ' altrimenti verifico se esiste la regola del filtro generico
            If Not IsNothing(m_sFileNameFilter) Then
               ' verifico che la regola del filtro generico sia rispettata
               If m_sFileNameFilter(CurrFile) Then
                  ' aggiungo il file alla lista
                  m_FileList.Add(AllFilesInDir(FileIndex))
               End If
            Else
               ' aggiungo il file alla lista
               m_FileList.Add(AllFilesInDir(FileIndex))
            End If
         End If
      Next
      ' verifico se il nome file passatomi è presente nella lista
      If Not String.IsNullOrWhiteSpace(m_FileName) Then
         If Path.HasExtension(m_FileName) Then
            If m_FileList.Contains(m_FileName) Then
               SelectedFile = m_FileName
            ElseIf m_FileList.Contains(m_sDirectory & "\" & m_FileName) Then
               SelectedFile = m_sDirectory & "\" & m_FileName
            End If
         Else
            For FileIndex = 0 To m_FileList.Count - 1
               Dim CurrFile As String = AllFilesInDir(FileIndex)
               If CurrFile = m_FileName Then
                  SelectedFile = m_FileName
               ElseIf CurrFile = m_sDirectory & "\" & m_FileName Then
                  SelectedFile = m_sDirectory & "\" & m_FileName
               End If
            Next
         End If
      End If
   End Function

   Friend Function Save() As Boolean
      Dim sCompleteFileName As String = m_sDirectory & "\" & m_WriteFileName & If(IsFolder, "", m_sExtension)
      If String.IsNullOrWhiteSpace(m_WriteFileName) Then
         MessageBox.Show(EgtMsg(MSG_EGTSAVEFILEDIALOG + 8), EgtMsg(MSG_EGTSAVEFILEDIALOG + 7), MessageBoxButton.OK, MessageBoxImage.Error)
         Return False
      End If
      If IsFolder Then
         If System.IO.Directory.Exists(sCompleteFileName) Then
            If MessageBox.Show(m_WriteFileName & " " & EgtMsg(MSG_EGTSAVEFILEDIALOG + 3) & vbCrLf & EgtMsg(MSG_EGTSAVEFILEDIALOG + 4), EgtMsg(MSG_EGTSAVEFILEDIALOG + 9), MessageBoxButton.YesNo, MessageBoxImage.Exclamation) <> MessageBoxResult.Yes Then
               Return False
            End If
         End If
      Else
         If File.Exists(sCompleteFileName) Then
            If MessageBox.Show(m_WriteFileName & " " & EgtMsg(MSG_EGTSAVEFILEDIALOG + 3) & vbCrLf & EgtMsg(MSG_EGTSAVEFILEDIALOG + 4), EgtMsg(MSG_EGTSAVEFILEDIALOG + 9), MessageBoxButton.YesNo, MessageBoxImage.Exclamation) <> MessageBoxResult.Yes Then
               Return False
            End If
         End If
      End If
      m_FileName = sCompleteFileName
      Return True
   End Function

End Class