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(600,500)

# Add controls
$lblConfig = New-Object System.Windows.Forms.Label
$lblConfig.Text = "SharePoint Configuration:"
$lblConfig.Location = New-Object System.Drawing.Point(20,20)
$lblConfig.Size = New-Object System.Drawing.Size(200,20)
$form.Controls.Add($lblConfig)

$txtSiteUrl = New-Object System.Windows.Forms.TextBox
$txtSiteUrl.Location = New-Object System.Drawing.Point(20,40)
$txtSiteUrl.Size = New-Object System.Drawing.Size(200,20)
$txtSiteUrl.PlaceholderText = "Site URL"

$txtProdLib = New-Object System.Windows.Forms.TextBox
$txtProdLib.Location = New-Object System.Drawing.Point(20,70)
$txtProdLib.Size = New-Object System.Drawing.Size(200,20)
$txtProdLib.PlaceholderText = "Production Library"

$txtTempLib = New-Object System.Windows.Forms.TextBox
$txtTempLib.Location = New-Object System.Drawing.Point(20,100)
$txtTempLib.Size = New-Object System.Drawing.Size(200,20)
$txtTempLib.PlaceholderText = "Temp Library"

$txtFolder = New-Object System.Windows.Forms.TextBox
$txtFolder.Location = New-Object System.Drawing.Point(20,130)
$txtFolder.Size = New-Object System.Drawing.Size(200,20)
$txtFolder.PlaceholderText = "Folder Path (optional)"

$btnBrowse = New-Object System.Windows.Forms.Button
$btnBrowse.Location = New-Object System.Drawing.Point(230,130)
$btnBrowse.Size = New-Object System.Drawing.Size(80,20)
$btnBrowse.Text = "Browse"

$btnList = New-Object System.Windows.Forms.Button
$btnList.Location = New-Object System.Drawing.Point(20,170)
$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(160,170)
$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(300,170)
$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(20,210)
$txtStatus.Size = New-Object System.Drawing.Size(540,240)
$txtStatus.Multiline = $true
$txtStatus.ScrollBars = "Vertical"
$form.Controls.Add($txtStatus)
# Add Save Config button
$btnSaveConfig = New-Object System.Windows.Forms.Button
$btnSaveConfig.Location = New-Object System.Drawing.Point(230,40)
$btnSaveConfig.Size = New-Object System.Drawing.Size(80,20)
$btnSaveConfig.Text = "Save Config"
$btnSaveConfig.Add_Click({
    Save-Config -SiteUrl $txtSiteUrl.Text `
                -ProductionLibrary $txtProdLib.Text `
                -TempLibrary $txtTempLib.Text
})

$form.Controls.AddRange(@(
    $txtSiteUrl,
    $txtProdLib,
    $txtTempLib,
    $txtFolder,
    $btnBrowse,
    $btnSaveConfig
))

# Load configuration
if (-not (Load-Config)) {
    [System.Windows.Forms.MessageBox]::Show("Configuration missing! Please enter settings.")
}
else {
    $txtSiteUrl.Text = $config.SiteUrl
    $txtProdLib.Text = $config.ProductionLibrary
    $txtTempLib.Text = $config.TempLibrary
}

# Attach event handlers
$btnList.Add_Click({ List-XlsFiles })
$btnConvert.Add_Click({ Convert-Files })
$btnMove.Add_Click({ Move-Files })
$btnBrowse.Add_Click({
    try {
        if (-not (Connect-SharePoint)) {
            [System.Windows.Forms.MessageBox]::Show("Please configure and connect to SharePoint first!")
            return
        }
        
        $selectedFolder = Get-FolderBrowser
        if ($selectedFolder) {
            $webUrl = (Get-PnPWeb).ServerRelativeUrl
            $relativePath = $selectedFolder.ServerRelativeUrl -replace [regex]::Escape($webUrl), ""
            $script:txtFolder.Text = $relativePath.Trim('/')
        }
    }
    catch {
        $script:txtStatus.Text += "Folder browse error: $_`n"
    }
})

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