$ErrorActionPreference = "Stop"

$ProjectDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path
$EnvironmentFile = Join-Path $ProjectDirectory ".env"

if (Test-Path $EnvironmentFile) {
    Write-Host ".env besteht bereits; es wurde nichts ueberschrieben."
    exit 0
}

function New-RandomHex([int]$ByteCount) {
    $Bytes = New-Object byte[] $ByteCount
    $Generator = [System.Security.Cryptography.RandomNumberGenerator]::Create()

    try {
        $Generator.GetBytes($Bytes)
    }
    finally {
        $Generator.Dispose()
    }

    return (($Bytes | ForEach-Object { $_.ToString("x2") }) -join "")
}

$DatabasePassword = New-RandomHex 24
$SecretKeyBase = New-RandomHex 64
$PgHeroPassword = New-RandomHex 16

$Content = @"
DATABASE_PASSWORD=$DatabasePassword
SECRET_KEY_BASE=$SecretKeyBase
API_PORT=13000
FRONTEND_PORT=13131
FRONTEND_ORIGINS=http://localhost:13131
FRONTEND_URL=http://localhost:13131
ADMIN_EMAIL=christoph@marzell.net
MAILER_FROM=praktikum@marzell.net
SMTP_ENABLED=true
SMTP_ADDRESS=smtp.ionos.de
SMTP_PORT=587
SMTP_USERNAME=praktikum@marzell.net
SMTP_PASSWORD=CHANGE_ME
SMTP_DOMAIN=marzell.net
BACKUP_NOTIFY_EMAIL=christoph@marzell.net
TRAINING_WATCH_NOTIFY_EMAIL=christoph@marzell.net
PGHERO_USERNAME=admin
PGHERO_PASSWORD=$PgHeroPassword
"@

[System.IO.File]::WriteAllText(
    $EnvironmentFile,
    $Content,
    [System.Text.UTF8Encoding]::new($false)
)

Write-Host ".env wurde mit zufaelligen Zugangsdaten erstellt."