# Logger.psm1 -- Einfaches Logging-Modul fuer den Mail-Organizer

$script:LogFile = $null
$script:LogLevel = "Info"

$script:LevelPriority = @{
    "Debug" = 0
    "Info"  = 1
    "Warn"  = 2
    "Error" = 3
}

function Initialize-Logger {
    param(
        [Parameter(Mandatory)]
        [string]$LogDirectory,

        [string]$Level = "Info",
        [int]$RetentionDays = 30
    )

    if (-not (Test-Path $LogDirectory)) {
        New-Item -ItemType Directory -Path $LogDirectory -Force | Out-Null
    }

    $script:LogFile = Join-Path $LogDirectory "mail-organizer_$(Get-Date -Format 'yyyy-MM-dd').log"
    $script:LogLevel = $Level

    # Alte Logs aufraeumen
    Get-ChildItem -Path $LogDirectory -Filter "mail-organizer_*.log" |
        Where-Object { $_.LastWriteTime -lt (Get-Date).AddDays(-$RetentionDays) } |
        Remove-Item -Force

    Write-Log "=== Mail-Organizer gestartet ===" -Level Info
}

function Write-Log {
    param(
        [Parameter(Mandatory)]
        [string]$Message,

        [ValidateSet("Debug", "Info", "Warn", "Error")]
        [string]$Level = "Info"
    )

    if ($script:LevelPriority[$Level] -lt $script:LevelPriority[$script:LogLevel]) {
        return
    }

    $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
    $entry = "[$timestamp] [$Level] $Message"

    if ($script:LogFile) {
        Add-Content -Path $script:LogFile -Value $entry -Encoding UTF8
    }

    switch ($Level) {
        "Error" { Write-Host $entry -ForegroundColor Red }
        "Warn"  { Write-Host $entry -ForegroundColor Yellow }
        "Debug" { Write-Host $entry -ForegroundColor Gray }
        default { Write-Host $entry }
    }
}

Export-ModuleMember -Function Initialize-Logger, Write-Log