' ============================================================
' Common Functions
' ============================================================

Function CleanCSVField(ByVal field As Variant) As String
    If IsEmpty(field) Or IsNull(field) Then
        CleanCSVField = ""
        Exit Function
    End If
    
    Dim result As String
    result = Trim(CStr(field))
    
    If Len(result) >= 2 Then
        If Left(result, 1) = """" And Right(result, 1) = """" Then
            result = Mid(result, 2, Len(result) - 2)
            result = Replace(result, """""", """")
        End If
    End If
    
    CleanCSVField = result
End Function

Function ValidateCSVColumnCount(ByRef lines As Variant, ByVal expectedColumns As Long) As Boolean
    ValidateCSVColumnCount = True
    
    Dim lineNum As Long
    Dim dataArray As Variant
    Dim validRowCount As Long
    validRowCount = 0
    
    For lineNum = 0 To UBound(lines)
        If Trim(lines(lineNum)) <> "" Then
            dataArray = Split(lines(lineNum), ",")
            If UBound(dataArray) + 1 <> expectedColumns Then
                MsgBox "CSV line " & (lineNum + 1) & " has " & (UBound(dataArray) + 1) & " columns. Expected " & expectedColumns & ".", vbExclamation
                ValidateCSVColumnCount = False
                Exit Function
            End If
            validRowCount = validRowCount + 1
        End If
    Next lineNum
    
    If validRowCount = 0 Then
        MsgBox "No valid data in CSV.", vbExclamation
        ValidateCSVColumnCount = False
    End If
End Function

Function GetLastDataRow(ByVal ws As Worksheet, ByVal columnNum As Long) As Long
    GetLastDataRow = ws.Cells(ws.Rows.Count, columnNum).End(xlUp).Row
End Function

Sub ClearDataRows(ByVal ws As Worksheet, ByVal startRow As Long, ByVal columnNum As Long)
    Dim lastRow As Long
    lastRow = ws.Cells(ws.Rows.Count, columnNum).End(xlUp).Row
    
    If lastRow >= startRow Then
        ws.Range(ws.Cells(startRow, 1), ws.Cells(lastRow, 20)).ClearContents
    End If
End Sub

Function SelectCSVFile() As String
    Dim fileDialog As FileDialog
    Set fileDialog = Application.FileDialog(msoFileDialogFilePicker)
    
    With fileDialog
        .Filters.Clear
        .Filters.Add "CSV Files", "*.csv"
        .AllowMultiSelect = False
        If .Show <> -1 Then
            SelectCSVFile = ""
            Exit Function
        End If
        SelectCSVFile = .SelectedItems(1)
    End With
End Function

Function ReadCSVFile(ByVal filePath As String) As Variant
    If filePath = "" Then
        ReadCSVFile = Array()
        Exit Function
    End If
    
    Dim stream As Object
    Dim textContent As String
    
    Set stream = CreateObject("ADODB.Stream")
    With stream
        .Type = 2
        .Charset = "shift_jis"
        .Open
        .LoadFromFile filePath
        textContent = .ReadText
        .Close
    End With
    
    ReadCSVFile = Split(textContent, vbLf)
End Function

Function GetSaveCSVPath(Optional ByVal defaultName As String = "") As String
    Dim savePath As String
    savePath = Application.GetSaveAsFilename( _
        FileFilter:="CSV Files (*.csv), *.csv", _
        Title:="Save CSV", _
        InitialFileName:=defaultName)
    
    If savePath = "False" Or savePath = "" Then
        GetSaveCSVPath = ""
        Exit Function
    End If
    
    If InStr(1, savePath, ".csv", vbTextCompare) = 0 Then
        savePath = savePath & ".csv"
    End If
    
    GetSaveCSVPath = savePath
End Function

Sub WriteCSVFile(ByVal filePath As String, ByVal content As String)
    Dim stream As Object
    Set stream = CreateObject("ADODB.Stream")
    With stream
        .Type = 2
        .Charset = "shift_jis"
        .Open
        .WriteText content, 1
        .SaveToFile filePath, 2
        .Close
    End With
End Sub

' ============================================================
' Z1 Specific Functions
' ============================================================

Sub Z1_ClearRowData(ByVal ws As Worksheet, ByVal rowNum As Long)
    ws.Range(ws.Cells(rowNum, 4), ws.Cells(rowNum, 15)).ClearContents
    ws.Cells(rowNum, 2).ClearContents
End Sub

Sub Z1_ImportMasterDetailData()
    Dim filePath As String
    Dim wsTarget As Worksheet
    Dim lines As Variant
    Dim i As Long
    Dim dataArray As Variant
    Dim writeRow As Long
    
    Set wsTarget = Me
    
    filePath = SelectCSVFile()
    If filePath = "" Then Exit Sub
    
    lines = ReadCSVFile(filePath)
    
    If Not ValidateCSVColumnCount(lines, 7) Then Exit Sub
    
    Call ClearDataRows(wsTarget, 7, 3)
    
    writeRow = 7
    
    For i = 0 To UBound(lines)
        If Trim(lines(i)) <> "" Then
            dataArray = Split(lines(i), ",")
            
            wsTarget.Cells(writeRow, 3).Value = CleanCSVField(CStr(dataArray(0)))
            wsTarget.Cells(writeRow, 4).Value = CleanCSVField(CStr(dataArray(1)))
            wsTarget.Cells(writeRow, 5).Value = CleanCSVField(CStr(dataArray(2)))
            wsTarget.Cells(writeRow, 6).Value = CleanCSVField(CStr(dataArray(3)))
            wsTarget.Cells(writeRow, 7).Value = CleanCSVField(CStr(dataArray(4)))
            wsTarget.Cells(writeRow, 8).Value = CleanCSVField(CStr(dataArray(5)))
            wsTarget.Cells(writeRow, 9).Value = CleanCSVField(CStr(dataArray(6)))
            
            writeRow = writeRow + 1
        End If
    Next i
    
    MsgBox writeRow - 7 & " rows imported.", vbInformation
End Sub

Sub Z1_ExportMasterDetailData()
    Dim ws As Worksheet
    Dim lastDataRow As Long
    Dim savePath As String
    Dim csvContent As String
    Dim r As Long
    Dim j As Long
    Dim rowCount As Long
    
    Set ws = ActiveSheet
    
    lastDataRow = GetLastDataRow(ws, 3)
    
    If lastDataRow < 7 Then
        MsgBox "No data rows to output.", vbExclamation
        Exit Sub
    End If
    
    savePath = GetSaveCSVPath()
    If savePath = "" Then Exit Sub
    
    csvContent = Trim(ws.Cells(5, 3).Value)
    For j = 9 To 18
        csvContent = csvContent & "," & Trim(ws.Cells(5, j).Value)
    Next j
    csvContent = csvContent & vbLf
    
    rowCount = 0
    For r = 7 To lastDataRow
        If Len(Trim(ws.Cells(r, 3).Value & "")) > 0 Then
            rowCount = rowCount + 1
            csvContent = csvContent & CleanCSVField(ws.Cells(r, 3).Value)
            For j = 9 To 18
                csvContent = csvContent & "," & CleanCSVField(ws.Cells(r, j).Value)
            Next j
            csvContent = csvContent & vbLf
        End If
    Next r
    
    Do While Right(csvContent, 1) = vbLf
        csvContent = Left(csvContent, Len(csvContent) - 1)
    Loop
    
    Call WriteCSVFile(savePath, csvContent)
    
    MsgBox "CSV export completed. Total data rows: " & rowCount, vbInformation
End Sub

Sub Z1_validateDetailData(ByVal ws As Worksheet, ByVal rowNum As Long)
    Dim cValue As String
    cValue = Trim(ws.Cells(rowNum, 3).Value)
    
    If cValue = "" Then
        ws.Cells(rowNum, 2).Value = "C column is required"
        Exit Sub
    End If
    
    If Len(cValue) <> 3 Then
        ws.Cells(rowNum, 2).Value = "C column must be 3 characters"
        Exit Sub
    End If
    
    Dim i As Long
    Dim ch As String
    For i = 1 To 3
        ch = Mid(cValue, i, 1)
        If Not ((ch >= "0" And ch <= "9") Or (ch >= "A" And ch <= "Z") Or (ch >= "a" And ch <= "z")) Then
            ws.Cells(rowNum, 2).Value = "C column must be alphanumeric"
            Exit Sub
        End If
    Next i
    
    Dim dValue As String
    dValue = Trim(ws.Cells(rowNum, 4).Value)
    If dValue = "" Then
        ws.Cells(rowNum, 2).Value = "D column is required"
        Exit Sub
    End If
    If Len(dValue) > 80 Then
        ws.Cells(rowNum, 2).Value = "D column must be within 80 characters"
        Exit Sub
    End If
    
    Dim eValue As String
    eValue = Trim(ws.Cells(rowNum, 5).Value)
    If eValue = "" Then
        ws.Cells(rowNum, 2).Value = "E column is required"
        Exit Sub
    End If
    If Len(eValue) > 80 Then
        ws.Cells(rowNum, 2).Value = "E column must be within 80 characters"
        Exit Sub
    End If
    
    Dim fValue As String
    fValue = Trim(ws.Cells(rowNum, 6).Value)
    If fValue <> "" And Len(fValue) > 80 Then
        ws.Cells(rowNum, 2).Value = "F column must be within 80 characters"
        Exit Sub
    End If
    
    Dim gValue As String
    gValue = Trim(ws.Cells(rowNum, 7).Value)
    If gValue <> "" And Len(gValue) > 80 Then
        ws.Cells(rowNum, 2).Value = "G column must be within 80 characters"
        Exit Sub
    End If
    
    Dim iValue As String
    iValue = Trim(ws.Cells(rowNum, 9).Value)
    If iValue <> "" And Len(iValue) > 80 Then
        ws.Cells(rowNum, 2).Value = "I column must be within 80 characters"
        Exit Sub
    End If
    
    Dim hValue As String
    hValue = Trim(ws.Cells(rowNum, 8).Value)
    If hValue <> "" Then
        If Len(hValue) <> 1 Then
            ws.Cells(rowNum, 2).Value = "H column must be 1 digit"
            Exit Sub
        End If
        If hValue <> "0" And hValue <> "1" Then
            ws.Cells(rowNum, 2).Value = "H column must be 0 or 1"
            Exit Sub
        End If
    End If
    
    ws.Cells(rowNum, 2).ClearContents
End Sub

Sub Z1_validateDetailDataButton()
    Dim ws As Worksheet
    Dim lastRow As Long
    Dim r As Long
    Dim errorCount As Long
    
    Set ws = ActiveSheet
    lastRow = GetLastDataRow(ws, 3)
    
    If lastRow < 7 Then
        MsgBox "No data found.", vbExclamation
        Exit Sub
    End If
    
    errorCount = 0
    For r = 7 To lastRow
        Call Z1_validateDetailData(ws, r)
        If Trim(ws.Cells(r, 2).Value) <> "" Then
            errorCount = errorCount + 1
        End If
    Next r
    
    MsgBox "Validation complete. Errors: " & errorCount, vbInformation
End Sub