param(
    [Parameter(Mandatory=$true)]
    [string]$SteamUser,
    
    [Parameter(Mandatory=$true)]
    [string]$SteamPass
)

Set-ExecutionPolicy Bypass -Scope Process -Force

$scriptDir = if ($PSScriptRoot) { $PSScriptRoot } 
    else { Split-Path -Parent $MyInvocation.MyCommand.Definition }
if (-not $scriptDir) { $scriptDir = Get-Location }

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

$appId = "223350"
$installDir = Join-Path $scriptDir "game_server"

$vcRedistUrl = "https://aka.ms/vs/17/release/vc_redist.x64.exe"
$vcRedistPath = Join-Path -Path $env:TEMP -ChildPath "vc_redist_x64.exe"

try {
    Write-Host "正在下载 VC++ 运行库..."
    (New-Object System.Net.WebClient).DownloadFile($vcRedistUrl, $vcRedistPath)
    
    if (Test-Path $vcRedistPath) {
        Write-Host "正在静默安装 VC++ 运行库..."
        $installProcess = Start-Process -FilePath $vcRedistPath `
            -ArgumentList "/install /quiet /norestart" `
            -Wait -NoNewWindow -PassThru
        Remove-Item $vcRedistPath -Force
    }
}
catch {
    Write-Error "VC++安装失败: $_"
    exit 1
}

$steamcmdDir = Join-Path $scriptDir "steamcmd"
$steamcmdUrl = "https://steamcdn-a.akamaihd.net/client/installer/steamcmd.zip"
$steamcmdZip = Join-Path $steamcmdDir "steamcmd.zip"

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

    Write-Host "正在下载 SteamCMD..."
    (New-Object System.Net.WebClient).DownloadFile($steamcmdUrl, $steamcmdZip)
    
    if (Test-Path $steamcmdZip) {
        Write-Host "正在解压 SteamCMD..."
        Expand-Archive -Path $steamcmdZip -DestinationPath $steamcmdDir -Force
        Remove-Item $steamcmdZip -Force
    }
}
catch {
    Write-Error "SteamCMD操作失败: $_"
    exit 1
}

$steamcmdExe = Join-Path $steamcmdDir "steamcmd.exe"

try {
    if (Test-Path $steamcmdExe) {
        Write-Host "正在更新游戏服务器 (AppID: $appId)..."
        $arguments = @(
            "+force_install_dir `"$installDir`"",
            "+login `"$SteamUser`" `"$SteamPass`"",
            "+app_update $appId validate",
            "+quit"
        )
        $process = Start-Process -FilePath $steamcmdExe `
            -ArgumentList $arguments `
            -Wait -NoNewWindow -PassThru `
    }
    else {
        throw "SteamCMD可执行文件未找到: $steamcmdExe"
    }
}
catch {
    Write-Error "游戏更新失败: $_"
    exit 1
}

$updateBatPath = Join-Path $scriptDir "更新服务器.bat"
$batContent = @"
@echo off
set STEAMCMD_PATH="$steamcmdDir"
set STEAM_USER=$SteamUser
set STEAM_PASS=$SteamPass
set INSTALL_DIR="$installDir"
set APP_ID=$appId

cd /d %STEAMCMD_PATH%
steamcmd.exe +login %STEAM_USER% %STEAM_PASS% +force_install_dir %INSTALL_DIR% +app_update %APP_ID% validate +quit

echo 服务器已更新完成!
pause
"@

$batContent | Out-File -FilePath $updateBatPath -Encoding Default
Write-Host "已创建更新脚本: $updateBatPath" -ForegroundColor Cyan
Write-Host "双击此文件可一键更新服务器" -ForegroundColor Green

Write-Host "`n所有操作已完成!" -ForegroundColor Green