<#
  修复 Docker Desktop 起不来（引擎一直 Stopped、反复弹「恢复出厂设置」）的问题。

  根因：Docker Desktop 崩溃后会留下僵尸 unix socket 文件（例：
    %LOCALAPPDATA%\Docker\run\dockerInference
    %LOCALAPPDATA%\docker-secrets-engine\engine.sock
  这类文件在 Windows 上删不掉（"系统无法访问此文件"），下次启动时
  Docker 后端"先删后建"失败 → 再次崩溃 → 又弹重置框，形成死循环。

  处理：把上面两个目录整体改名（不删除，可恢复），让 Docker 重新创建。

  用法：
    pwsh -NoProfile -File scripts/docker-fix-start.ps1            # 只清理
    pwsh -NoProfile -File scripts/docker-fix-start.ps1 -Start     # 清理并启动，等引擎就绪
#>
param(
    [switch]$Start,
    [int]$TimeoutSeconds = 240
)

$ErrorActionPreference = 'Stop'

$apps = Get-Process -ErrorAction SilentlyContinue |
    Where-Object { $_.ProcessName -in @('Docker Desktop', 'com.docker.backend', 'docker') }
if ($apps) {
    $apps | Stop-Process -Force -ErrorAction SilentlyContinue
    Write-Host ('已结束 Docker 相关进程：' + (($apps | Select-Object -ExpandProperty ProcessName -Unique) -join ', '))
    Start-Sleep -Seconds 3
}

$stamp = Get-Date -Format 'yyyyMMdd-HHmmss'
$targets = @(
    (Join-Path $env:LOCALAPPDATA 'Docker\run'),
    (Join-Path $env:LOCALAPPDATA 'docker-secrets-engine')
)

foreach ($path in $targets) {
    if (-not (Test-Path -LiteralPath $path)) {
        Write-Host "无需处理（不存在）：$path"
        continue
    }
    $leaf = "$(Split-Path -Leaf $path).stale-$stamp"
    try {
        Rename-Item -LiteralPath $path -NewName $leaf -ErrorAction Stop
        Write-Host "已改名：$path -> $leaf"
    } catch {
        Write-Host "改名失败：$path（$($_.Exception.Message)）"
    }
}

if (-not $Start) {
    Write-Host '清理完成。加 -Start 可直接启动 Docker Desktop 并等待引擎就绪。'
    return
}

$exe = 'C:\Program Files\Docker\Docker\Docker Desktop.exe'
if (-not (Test-Path -LiteralPath $exe)) { throw "找不到 Docker Desktop：$exe" }
Start-Process -FilePath $exe
Write-Host '已启动 Docker Desktop，等待引擎就绪…'

$deadline = (Get-Date).AddSeconds($TimeoutSeconds)
while ((Get-Date) -lt $deadline) {
    Start-Sleep -Seconds 10
    $version = (docker version --format '{{.Server.Version}}' 2>$null)
    if ($version) {
        Write-Host "引擎已就绪：$version"
        exit 0
    }
}

Write-Host '超时：引擎仍未就绪。请查看 Docker Desktop 窗口的错误提示（不要点「恢复出厂设置」）。'
exit 1