Add-Type -AssemblyName System.Windows.Forms
Import-Module PnP.PowerShell

# Import our components
. "$PSScriptRoot\SharePointFunctions.ps1"
. "$PSScriptRoot\EventHandlers.ps1"

# Create main form
$form = New-Object System.Windows.Forms.Form
$form.Text = "SharePoint XLS Converter"
$form.Size = New-Object System.Drawing.Size(600,400)

# Add controls
$txtSiteUrl = New-Object System.Windows.Forms.TextBox
$txtSiteUrl.Location = New-Object System.Drawing.Point(20,120)
$txtSiteUrl.Size = New-Object System.Drawing.Size(200,20)

$btnSaveConfig = New-Object System.Windows.Forms.Button
$btnSaveConfig.Location = New-Object System.Drawing.Point(230,120)
$btnSaveConfig.Size = New-Object System.Drawing.Size(80,20)
$btnSaveConfig.Text = "Save Config"

$btnList = New-Object System.Windows.Forms.Button
$btnList.Location = New-Object System.Drawing.Point(20,20)
$btnList.Size = New-Object System.Drawing.Size(120,30)
$btnList.Text = "List XLS Files"
$form.Controls.Add($btnList)

$btnConvert = New-Object System.Windows.Forms.Button
$btnConvert.Location = New-Object System.Drawing.Point(160,20)
$btnConvert.Size = New-Object System.Drawing.Size(120,30)
$btnConvert.Text = "Convert to XLSX"
$form.Controls.Add($btnConvert)

$btnMove = New-Object System.Windows.Forms.Button
$btnMove.Location = New-Object System.Drawing.Point(300,20)
$btnMove.Size = New-Object System.Drawing.Size(120,30)
$btnMove.Text = "Move Files"
$form.Controls.Add($btnMove)

$txtStatus = New-Object System.Windows.Forms.TextBox
$txtStatus.Location = New-Object System.Drawing.Point(20,70)
$txtStatus.Size = New-Object System.Drawing.Size(540,280)
$txtStatus.Multiline = $true
$txtStatus.ScrollBars = "Vertical"
$form.Controls.Add($txtStatus)
$form.Controls.Add($txtSiteUrl)
$form.Controls.Add($btnSaveConfig)

# Load configuration
if (-not (Load-Config)) {
    [System.Windows.Forms.MessageBox]::Show("Configuration missing! Please enter settings.")
}

# Attach event handlers
$btnList.Add_Click({ List-XlsFiles })
$btnConvert.Add_Click({ Convert-Files })
$btnMove.Add_Click({ Move-Files })

# Show form
$form.Add_Shown({$form.Activate()})
[void]$form.ShowDialog()