Public Class FindReplace
	Dim StartBounds, EndBounds As Integer
	Dim FindOptions As RichTextBoxFinds
	Public Property npu As NPUWindow

	Private Sub HighlightAllButton_Click(sender As Object, e As EventArgs) Handles HighlightAllButton.Click
		'StartBounds = 0
		'EndBounds = npu.TextFileHolder.TextLength
		Dim LastFound As Integer = 0
		Try
			While True
				npu.TextFileHolder.[Select](npu.TextFileHolder.Find(FindMe.Text, LastFound, npu.TextFileHolder.TextLength, RichTextBoxFinds.None), FindMe.Text.Length)
				npu.TextFileHolder.SelectionFont = New Font(npu.TextFileHolder.Font, FontStyle.Bold)
				npu.TextFileHolder.SelectionBackColor = Color.Yellow
				LastFound = npu.TextFileHolder.Find(FindMe.Text, LastFound, npu.TextFileHolder.TextLength, RichTextBoxFinds.None) + 1
			End While
		Catch ex As Exception
			Dim FindMeCountable As String() = New String(0) {FindMe.Text.ToLower}
			FindStatus.Text = ("Found " & npu.TextFileHolder.Text.ToString.ToLower.Split(FindMeCountable, StringSplitOptions.None).Length - 1 & " results").Replace("1 results", "1 result")
		End Try

	End Sub

	Private Sub Button2_Click(sender As Object, e As EventArgs) Handles ViewNextButton.Click
		'this code shares a lot with find.vb. in fact it pretty much IS just the find code from find.vb
		If EndBounds = 0 Then EndBounds = npu.TextFileHolder.TextLength
		If ForwardsRadio.Checked Then
			FindOptions = RichTextBoxFinds.None Or GetFindSettings()
			StartBounds += 1
			EndBounds = npu.TextFileHolder.TextLength
		Else
			FindOptions = RichTextBoxFinds.Reverse Or GetFindSettings()
			StartBounds = 0
			EndBounds -= 1
		End If
		FindStatus.Text = ("Found " & CountFindMeAppearances() & " results").Replace("1 results", "1 result")
		ResetFormatting()
		If FindStatus.Text = "Found 0 results" Then
			Beep()
		Else
			Dim findResult As Integer = npu.TextFileHolder.Find(FindMe.Text, StartBounds, EndBounds, FindOptions)
			If findResult = -1 Then
				FindStatus.Text = "Reached last instance, looping"
				StartBounds = 0
				EndBounds = npu.TextFileHolder.TextLength
			End If
			npu.TextFileHolder.[Select](npu.TextFileHolder.Find(FindMe.Text, StartBounds, EndBounds, FindOptions), FindMe.Text.Length)
			npu.TextFileHolder.SelectionFont = New Font(npu.TextFileHolder.Font, FontStyle.Bold)
			npu.TextFileHolder.SelectionBackColor = Color.Yellow
			If StartBounds < 0 Then StartBounds = 0
			If EndBounds < 0 Then EndBounds = npu.TextFileHolder.TextLength
			StartBounds = npu.TextFileHolder.Find(FindMe.Text, StartBounds, EndBounds, FindOptions)
			EndBounds = npu.TextFileHolder.Find(FindMe.Text, StartBounds, EndBounds, FindOptions) + FindMe.Text.Length
			npu.TextFileHolder.SelectionStart = StartBounds
			If sender.name = "PreviousButton" Then npu.TextFileHolder.SelectionStart = EndBounds
			npu.TextFileHolder.ScrollToCaret() 'TODO: Fix jumpiness
		End If
	End Sub

	Public Sub ResetFormatting() Handles Me.Closed
		npu.TextFileHolder.[Select](0, npu.TextFileHolder.TextLength)
		npu.TextFileHolder.SelectionFont = New Font(npu.TextFileHolder.Font, FontStyle.Regular)
		npu.TextFileHolder.SelectionBackColor = npu.TextFileHolder.BackColor
		npu.TextFileHolder.Select(0, 0)
	End Sub

	Private Function GetFindSettings()
		Return 0 + (4 * Math.Abs(CInt(MatchCaseCheckBox.Checked))) + (2 * Math.Abs(CInt(WholeWordCheckBox.Checked)))
	End Function

	Private Sub ReplaceOnceButton_Click(sender As Object, e As EventArgs) Handles ReplaceOnceButton.Click
		If npu.TextFileHolder.SelectedText <> FindMe.Text Then ViewNextButton.PerformClick() '~u0
		If FindStatus.Text <> "Found 0 results" Then npu.TextFileHolder.SelectedText = ReplaceWithMe.Text
		ViewNextButton.PerformClick()
	End Sub

	Private Sub ReplaceAllButton_Click(sender As Object, e As EventArgs) Handles ReplaceAllButton.Click
		npu.TextFileHolder.Text = npu.TextFileHolder.Text.Replace(FindMe.Text, ReplaceWithMe.Text) 'TODO: make it work better than this
		ResetFormatting()
	End Sub

	Public Function CountFindMeAppearances()
		Dim FindMeCountable As String() = New String(0) {FindMe.Text.ToLower}
		Select Case GetFindSettings()
			Case 0
				Return npu.TextFileHolder.Text.ToString.ToLower.Split(FindMeCountable, StringSplitOptions.None).Length - 1

			Case 2 'WHOLE WORD
				Return CountWholeWordFindMeAppearances(FindMe.Text, FindOptions, False)

			Case 4 'MATCH CASE
				FindMeCountable = New String(0) {FindMe.Text}
				Return npu.TextFileHolder.Text.ToString.Split(FindMeCountable, StringSplitOptions.None).Length - 1

			Case 6 'ALL OPTIONS
				Return CountWholeWordFindMeAppearances(FindMe.Text, FindOptions, True)

			Case Else
				Return npu.TextFileHolder.Text.ToString.ToLower.Split(FindMeCountable, StringSplitOptions.None).Length - 1
		End Select
	End Function

End Class