# china-etax-wizard Skill installer (Windows PowerShell).
# 只做四件事：下载、校验 SHA-256、解压、复制到 Skill 目录（旧版移到备份）。不运行包里其他任何东西。
param(
  [string]$File = "",
  [string]$Sha256 = "",
  [ValidateSet("all","claude","codex","custom")] [string]$Agent = "all",
  [string]$Dir = ""
)

$ErrorActionPreference = "Stop"
$Base = "https://www.paibaowork.com/skills/china-etax-wizard"
$Pkg = "china-etax-wizard-skill.tar.gz"
$Skill = "china-etax-wizard"
$Backup = Join-Path $HOME ".config\china-etax\skill-backups"

$TMP = Join-Path ([System.IO.Path]::GetTempPath()) ("cetax-" + [guid]::NewGuid().ToString("N"))
New-Item -ItemType Directory -Force -Path $TMP | Out-Null

try {
  if ($File -ne "") {
    Copy-Item $File (Join-Path $TMP $Pkg)
  } else {
    Write-Host "下载 $Base/latest/$Pkg ..."
    Invoke-WebRequest -Uri "$Base/latest/$Pkg" -OutFile (Join-Path $TMP $Pkg)
  }

  $pkgPath = Join-Path $TMP $Pkg
  if ($Sha256 -eq "" -and $File -eq "") {
    try {
      $shaText = (Invoke-WebRequest -Uri "$Base/latest/$Pkg.sha256").Content
      $Sha256 = ($shaText -split '\s+')[0]
    } catch {}
  }
  if ($Sha256 -ne "") {
    $got = (Get-FileHash $pkgPath -Algorithm SHA256).Hash.ToLower()
    if ($got -ne $Sha256.ToLower()) {
      Write-Error "SHA-256 校验失败，停止安装。`n  期望 $Sha256`n  实际 $got"
      exit 1
    }
    Write-Host "SHA-256 校验通过。"
  } else {
    Write-Host "未提供 SHA-256，跳过校验（建议从官网 .sha256 核对）。"
  }

  # Windows 自带 tar（Windows 10 1803+）
  tar -xzf $pkgPath -C $TMP
  $src = Join-Path $TMP "skills\$Skill"
  if (-not (Test-Path $src)) { Write-Error "包结构异常：缺少 skills\$Skill"; exit 1 }

  function Install-One([string]$Target) {
    New-Item -ItemType Directory -Force -Path $Target | Out-Null
    $dst = Join-Path $Target $Skill
    if (Test-Path $dst) {
      New-Item -ItemType Directory -Force -Path $Backup | Out-Null
      $stamp = Get-Date -Format "yyyyMMddHHmmss"
      Move-Item $dst (Join-Path $Backup "$Skill-$stamp")
      Write-Host "旧版已备份到 $(Join-Path $Backup "$Skill-$stamp")"
    }
    Copy-Item $src $dst -Recurse
    Write-Host "已安装到 $dst"
  }

  switch ($Agent) {
    "claude" { Install-One (Join-Path $HOME ".claude\skills") }
    "codex"  { Install-One (Join-Path $HOME ".agents\skills") }
    "custom" { Install-One $Dir }
    "all" {
      Install-One (Join-Path $HOME ".claude\skills")
      Install-One (Join-Path $HOME ".agents\skills")
    }
  }

  Write-Host "完成。请阅读 $Skill/SKILL.md：登录、刷脸、验证码、最终提交由你本人操作。"
}
finally {
  Remove-Item -Recurse -Force $TMP -ErrorAction SilentlyContinue
}