[CmdletBinding()]
param(
    [string]$EnvFile = '.env',
    [switch]$SkipBuild,
    [switch]$CheckOnly
)

$ErrorActionPreference = 'Stop'
# 仅载入此脚本允许的配置名，不把 .env 当成可执行脚本。
$examplePath = Join-Path $PSScriptRoot '.env.example'
$allowedNames = @{}
foreach ($line in Get-Content -LiteralPath $examplePath -Encoding UTF8) {
    if ($line -match '^([A-Z][A-Z0-9_]*)=') { $allowedNames[$Matches[1]] = $true }
}
$envPath = if ([IO.Path]::IsPathRooted($EnvFile)) { $EnvFile } else { Join-Path $PSScriptRoot $EnvFile }
if (-not (Test-Path -LiteralPath $envPath -PathType Leaf)) {
    throw '缺少本地 .env；请从 .env.example 复制到 .env 并填写，不要覆盖现有文件。'
}
$settings = @{}
foreach ($line in Get-Content -LiteralPath $envPath -Encoding UTF8) {
    if ([string]::IsNullOrWhiteSpace($line) -or $line.TrimStart().StartsWith('#')) { continue }
    if ($line -notmatch '^([A-Z][A-Z0-9_]*)=(.*)$') { throw '环境文件格式错误：请使用 KEY=value，不使用 export 或引号。' }
    $settingName = $Matches[1]
    $settingValue = $Matches[2]
    if (-not $allowedNames.ContainsKey($settingName)) { throw "环境文件包含未知配置名：$settingName" }
    if ($settings.ContainsKey($settingName)) { throw "环境文件包含重复配置名：$settingName" }
    if ($settingValue -match '^["'']' -or $settingValue -match '\s#' -or $settingValue.Contains('$')) {
        throw "配置 $settingName 必须使用未加引号的单行原文，不能包含变量引用或行尾注释。"
    }
    $settings[$settingName] = $settingValue
}
foreach ($requiredName in @('DB_PASSWORD','MYSQL_ROOT_PASSWORD','REDIS_PASSWORD','RABBITMQ_PASSWORD','JWT_SECRET')) {
    if (-not $settings.ContainsKey($requiredName) -or [string]::IsNullOrWhiteSpace($settings[$requiredName]) -or $settings[$requiredName].StartsWith('replace-me-')) {
        throw "请为 $requiredName 设置自己的非示例值。"
    }
}
if ([Text.Encoding]::UTF8.GetByteCount($settings['JWT_SECRET']) -lt 32) { throw 'JWT_SECRET 至少需要 32 字节。' }
if ($CheckOnly) {
    Write-Host '本地配置格式与必填项检查通过（未连接任何服务、未构建或启动）。'
    return
}

$savedEnvironment = @{}
foreach ($settingName in $allowedNames.Keys) {
    $savedEnvironment[$settingName] = [Environment]::GetEnvironmentVariable($settingName, 'Process')
}
Push-Location $PSScriptRoot
try {
    # 清除继承的同名云凭据，只接受该 .env 中填写的值；空项回落到模板的占位值。
    foreach ($settingName in $allowedNames.Keys) {
        $settingValue = if ($settings.ContainsKey($settingName) -and $settings[$settingName] -ne '') { $settings[$settingName] } else { $null }
        if ($null -eq $settingValue) {
            Remove-Item -LiteralPath "Env:$settingName" -ErrorAction SilentlyContinue
        } else {
            [Environment]::SetEnvironmentVariable($settingName, $settingValue, 'Process')
        }
    }
    if (-not $SkipBuild) {
        & mvn -Pportable clean verify
        if ($LASTEXITCODE -ne 0) { throw '构建或测试失败，未启动后端。' }
    }
    $jarPath = Join-Path $PSScriptRoot 'target/portable/campus-server-1.0.0.jar'
    if (-not (Test-Path -LiteralPath $jarPath -PathType Leaf)) { throw '缺少 portable JAR，请先执行 mvn -Pportable clean verify。' }
    $configPath = (Join-Path $PSScriptRoot 'src/main/resources/application.example.yml').Replace('\', '/')
    & java -Duser.timezone=GMT+08 -jar $jarPath "--spring.config.location=file:$configPath"
    if ($LASTEXITCODE -ne 0) { throw '后端退出异常，请检查启动日志。' }
} finally {
    foreach ($settingName in $allowedNames.Keys) {
        if ($null -eq $savedEnvironment[$settingName]) {
            Remove-Item -LiteralPath "Env:$settingName" -ErrorAction SilentlyContinue
        } else {
            [Environment]::SetEnvironmentVariable($settingName, $savedEnvironment[$settingName], 'Process')
        }
    }
    Pop-Location
}