# 浏览器来源为可选项：缺失或留空时保持宽松策略，显式配置时校验。
. (Join-Path $PSScriptRoot "Initialize-PublicApiBaseUrl.ps1")

function Initialize-SecurityOrigin {
    param([Parameter(Mandatory = $true)][string]$Path)
    if (-not (Test-Path $Path)) { throw "Environment file not found: $Path" }

    $content = Get-Content $Path -Raw -Encoding UTF8
    if ($null -eq $content) { $content = "" }
    $current = Get-PublicEnvValue $content "CONFIG_SECURITY_ORIGIN"

    if (-not $current) {
        Write-Host "   [OK] Browser origin is not configured; backend allows all origins" -ForegroundColor Green
        return
    }

    # The legacy sample value was not a user-selected allowlist. Clear it on non-local upgrades.
    if ($current -eq "http://127.0.0.1,http://localhost") {
        $apiUrl = Get-PublicEnvValue $content "CONFIG_PUBLIC_API_BASE_URL"
        $normalizedApiUrl = ConvertTo-PublicApiBaseUrl $apiUrl
        if ($normalizedApiUrl) {
            $derived = ([Uri]$normalizedApiUrl).GetLeftPart([UriPartial]::Authority)
            if ($derived -notin @('http://127.0.0.1', 'http://localhost')) {
                $content = Set-PublicEnvValue $content "CONFIG_SECURITY_ORIGIN" ""
                [System.IO.File]::WriteAllText(
                    (Resolve-Path $Path),
                    $content,
                    [System.Text.UTF8Encoding]::new($false)
                )
                Write-Host "   [OK] Cleared legacy browser-origin sample; backend allows all origins" -ForegroundColor Green
                return
            }
        }
    }

    if ($current.StartsWith(',') -or $current.EndsWith(',') -or $current.Contains(',,')) {
        throw "CONFIG_SECURITY_ORIGIN contains an empty origin"
    }
    foreach ($value in $current.Split(',')) {
        $origin = $value.Trim()
        $uri = $null
        if (-not [Uri]::TryCreate($origin, [UriKind]::Absolute, [ref]$uri) -or
            $uri.Scheme -notin @('http', 'https') -or
            $uri.UserInfo -or $uri.Query -or $uri.Fragment -or
            $uri.AbsolutePath -ne '/' -or -not $uri.Host) {
            throw "CONFIG_SECURITY_ORIGIN must contain only http(s) origins without paths or wildcards"
        }
    }
}