#Requires -Version 7.4
# Windows Defender EDR Plugin (Mock)

#region Helper Functions

function Get-DefenderServiceStatus {
    # Mock: In production, would check actual service status
    @{
        ServiceName = 'WinDefend'
        DisplayName = 'Microsoft Defender Antivirus Service'
        Status = 'Running'
        StartType = 'Automatic'
    }
}

function Get-DefenderDefinitionAge {
    # Mock: Returns days since last definition update
    0
}

function Invoke-DefenderQuickScan {
    param([string[]]$Exclusions = @())

    Write-vSEALLog "Starting Defender quick scan..."
    if ($Exclusions.Count -gt 0) {
        Write-vSEALLog "Exclusions: $($Exclusions -join ', ')" -Level 'DEBUG'
    }
    # Mock: In production, would run MpCmdRun.exe -Scan -ScanType 1
    Write-vSEALLog "Quick scan completed (mock)"
}

#endregion

#region Plugin Contract

function Get-PluginConfigSchema {
    @{
        scan_before_seal = @{
            Type        = 'bool'
            Default     = $true
            Required    = $false
            Description = 'Run quick scan before sealing'
        }
        exclusions = @{
            Type        = 'string[]'
            Default     = @()
            Required    = $false
            Description = 'Paths to exclude from scanning'
        }
    }
}

function Test-Applicable {
    param($Globals)

    # Check if Defender service exists
    $status = Get-DefenderServiceStatus
    if (-not $status) {
        return @{ Applicable = $false; Reason = 'Windows Defender service not found' }
    }

    # Skip on Server editions (typically use different AV)
    if ($Globals.OS.IsServer) {
        return @{ Applicable = $false; Reason = 'Server edition - Defender typically managed differently' }
    }

    return @{ Applicable = $true; Reason = $null }
}

function Get-PlannedActions {
    param($Config, $Globals, $Phase)

    $actions = @()

    if ($Phase -eq 'Seal') {
        if ($Config.scan_before_seal) {
            $actions += 'Run quick scan before sealing'
        }
        $actions += 'Stop Windows Defender service'
        $actions += 'Disable real-time protection for imaging'
    }
    elseif ($Phase -eq 'Engage') {
        $actions += 'Start Windows Defender service'
        $actions += 'Enable real-time protection'
        $actions += 'Trigger definition update'
    }

    return $actions
}

function Invoke-Seal {
    param($Config, $Globals)

    $status = Get-DefenderServiceStatus
    Write-vSEALLog "Defender status: $($status.Status)"

    # Optional pre-seal scan
    if ($Config.scan_before_seal) {
        Invoke-DefenderQuickScan -Exclusions $Config.exclusions
    }

    # Stop Defender service
    Write-vSEALLog "Stopping Windows Defender service..."
    # Mock: Stop-vSEALService -Name 'WinDefend'
    Write-vSEALLog "Windows Defender service stopped (mock)"

    # Disable real-time protection
    Write-vSEALLog "Disabling real-time protection for imaging..."
    # Mock: Set-MpPreference -DisableRealtimeMonitoring $true
    Write-vSEALLog "Real-time protection disabled (mock)"
}

function Invoke-Engage {
    param($Config, $Globals)

    # Re-enable real-time protection
    Write-vSEALLog "Enabling real-time protection..."
    # Mock: Set-MpPreference -DisableRealtimeMonitoring $false
    Write-vSEALLog "Real-time protection enabled (mock)"

    # Start Defender service
    Write-vSEALLog "Starting Windows Defender service..."
    # Mock: Start-vSEALService -Name 'WinDefend'
    Write-vSEALLog "Windows Defender service started (mock)"

    # Trigger definition update
    Write-vSEALLog "Triggering definition update..."
    # Mock: Update-MpSignature
    Write-vSEALLog "Definition update triggered (mock)"
}

#endregion
