$ErrorActionPreference = "Stop"

# === 由 CertCenter 生成 ===
$Domain    = "{{ domain }}"
$BaseUrl   = "{{ base_url }}"
$Token     = "{{ token }}"
$CertDir   = "{{ cert_dir }}"
$CheckCmd  = "{{ check_cmd }}"
$ReloadCmd = "{{ reload_cmd }}"
# ===========================

$EncodedDomain = [System.Uri]::EscapeDataString($Domain)
$TmpDir      = "$env:TEMP\cert-sync-$($Domain -replace '[*\.]','_')"
$VersionFile = "$CertDir\.version"

New-Item -ItemType Directory -Force -Path $CertDir, $TmpDir | Out-Null
$headers = @{ Authorization = "Bearer $Token" }

# 跳过 TLS 证书验证（CertCenter 初期可能使用自签证书）
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { $true }

# 1. 检查版本
$remote = (Invoke-WebRequest -Uri "$BaseUrl/api/version?domain=$EncodedDomain" -Headers $headers -UseBasicParsing -SkipCertificateCheck).Content.Trim()
$local  = if (Test-Path $VersionFile) { (Get-Content $VersionFile).Trim() } else { "0" }
if ($remote -eq $local) { exit 0 }

# 2. 下载证书
Invoke-WebRequest -Uri "$BaseUrl/api/cert/fullchain?domain=$EncodedDomain" -Headers $headers -OutFile "$TmpDir\fullchain.pem" -UseBasicParsing -SkipCertificateCheck
Invoke-WebRequest -Uri "$BaseUrl/api/cert/private?domain=$EncodedDomain"   -Headers $headers -OutFile "$TmpDir\private.key"   -UseBasicParsing -SkipCertificateCheck

# 3. 备份旧证书
Copy-Item "$CertDir\fullchain.pem" "$CertDir\fullchain.pem.bak" -ErrorAction SilentlyContinue
Copy-Item "$CertDir\private.key"   "$CertDir\private.key.bak"   -ErrorAction SilentlyContinue

# 4. 原子替换
Move-Item "$TmpDir\fullchain.pem" "$CertDir\fullchain.pem" -Force
Move-Item "$TmpDir\private.key"   "$CertDir\private.key"   -Force

# 5. 校验 & 重载
try {
    Invoke-Expression $CheckCmd
    $remote | Out-File -NoNewline -Encoding ascii $VersionFile
    Invoke-Expression $ReloadCmd
    Write-Host "[$(Get-Date -Format o)] updated: $Domain -> $remote"
} catch {
    Move-Item "$CertDir\fullchain.pem.bak" "$CertDir\fullchain.pem" -Force -ErrorAction SilentlyContinue
    Move-Item "$CertDir\private.key.bak"   "$CertDir\private.key"   -Force -ErrorAction SilentlyContinue
    Write-Error "[$(Get-Date -Format o)] FAILED: $Domain, rolled back"
    exit 1
}