# macOS / Linux
OS="$(uname -s)"   # Darwin / Linux
ARCH="$(uname -m)" # arm64 / x86_64
echo "平台: $OS, 架构: $ARCH"

# Windows (PowerShell)
$OS = "Windows"
$ARCH = if ([Environment]::Is64BitOperatingSystem) { "x64" } else { "x86" }
$WinVer = [System.Environment]::OSVersion.Version
Write-Host "平台: $OS, 架构: $ARCH, Windows 版本: $($WinVer.Major).$($WinVer.Minor).$($WinVer.Build)"

# macOS — 全量环境快照
echo "=== 系统环境快照 ==="
echo "--- 平台 ---"
echo "OS: $(uname -s), ARCH: $(uname -m), macOS: $(sw_vers -productVersion 2>/dev/null || echo 'N/A')"
echo ""
echo "--- Xcode CLT ---"
xcode-select -p >/dev/null 2>&1 && echo "xcode-select: 已安装 ($(xcode-select -p))" || echo "xcode-select: 未安装"
echo ""
echo "--- sudo 免密可用性 ---"
sudo -n true 2>/dev/null && echo "SUDO_OK=true" || echo "SUDO_OK=false (需使用非 sudo 安装方式)"
echo ""
echo "--- 包管理器 ---"
command -v brew >/dev/null 2>&1 && echo "brew: $(brew --version 2>&1 | head -1)" || echo "brew: 未安装"
echo ""
echo "--- 基础运行时 ---"
for cmd in node npm python3 pip3 go uv; do
  if command -v "$cmd" >/dev/null 2>&1; then
    ver="$("$cmd" --version 2>&1 | head -1)"
    echo "$cmd: $ver"
  else
    echo "$cmd: 未安装"
  fi
done
echo ""
echo "--- python3 真实性检测 ---"
python3 -c "import sys; print('python3 可用:', sys.version)" 2>/dev/null || echo "python3: 不可用或为 Xcode CLT stub"
echo ""
echo "--- CLI 工具 ---"
for cmd in curl git gh jq rg ffmpeg tmux whisper memo remindctl clawhub claude codex himalaya uv; do
  if command -v "$cmd" >/dev/null 2>&1; then
    echo "$cmd: 已安装"
  else
    echo "$cmd: 未安装"
  fi
done

# Windows — 全量环境快照（先切 UTF-8 防乱码）
chcp 65001 >nul
Write-Host "=== 系统环境快照 ==="
Write-Host "--- 平台 ---"
$ver = [System.Environment]::OSVersion.Version
Write-Host "OS: Windows, Build: $($ver.Major).$($ver.Minor).$($ver.Build), Arch: $(if ([Environment]::Is64BitOperatingSystem) {'x64'} else {'x86'})"
Write-Host ""
Write-Host "--- Shell 环境 ---"
Write-Host "当前 Shell: $($PSVersionTable.PSVersion) (PowerShell)"
$policy = Get-ExecutionPolicy -Scope CurrentUser
Write-Host "执行策略 (CurrentUser): $policy"
Write-Host ""
Write-Host "--- 包管理器 ---"
foreach ($pm in @("scoop", "winget", "choco")) {
    $c = Get-Command $pm -ErrorAction SilentlyContinue
    if ($c) { Write-Host "$pm`: 已安装" } else { Write-Host "$pm`: 未安装" }
}
Write-Host ""
Write-Host "--- 基础运行时 ---"
foreach ($cmd in @("node", "npm", "python", "pip", "go", "uv", "curl.exe", "git")) {
    $c = Get-Command $cmd -ErrorAction SilentlyContinue
    if ($c) {
        try { $v = & $cmd --version 2>&1 | Select-Object -First 1; Write-Host "$cmd`: $v" }
        catch { Write-Host "$cmd`: 已安装 (版本获取失败)" }
    } else { Write-Host "$cmd`: 未安装" }
}
Write-Host ""
Write-Host "--- CLI 工具 ---"
foreach ($cmd in @("gh", "jq", "rg", "ffmpeg", "whisper", "clawhub", "claude", "codex", "himalaya")) {
    $c = Get-Command $cmd -ErrorAction SilentlyContinue
    if ($c) { Write-Host "$cmd`: 已安装" } else { Write-Host "$cmd`: 未安装" }
}

# macOS — 网络检测（超时 3 秒判定可达性）
echo "=== 网络连通性检测 ==="
NEED_MIRROR=false
for url in "https://github.com" "https://raw.githubusercontent.com" "https://registry.npmjs.org" "https://pypi.org"; do
  if curl -sI --connect-timeout 3 "$url" > /dev/null 2>&1; then
    echo "可达: $url"
  else
    echo "不可达: $url"
    NEED_MIRROR=true
  fi
done
if [ "$NEED_MIRROR" = true ]; then
  echo ">>> 检测到境外源不可达，必须先配置镜像再继续安装 <<<"
fi

# Windows — 网络检测（先切 UTF-8 防乱码）
chcp 65001 >nul
Write-Host "=== 网络连通性检测 ==="
@("https://github.com", "https://raw.githubusercontent.com", "https://registry.npmjs.org", "https://pypi.org") | ForEach-Object {
    try {
        $sw = [System.Diagnostics.Stopwatch]::StartNew()
        Invoke-WebRequest -Uri $_ -TimeoutSec 3 -UseBasicParsing | Out-Null
        $sw.Stop()
        if ($sw.ElapsedMilliseconds -gt 2000) {
            "慢速 ($($sw.ElapsedMilliseconds)ms): $_ — 建议配置镜像"
        } else {
            "可达 ($($sw.ElapsedMilliseconds)ms): $_"
        }
    } catch { "不可达: $_ — 必须配置镜像" }
}

第 0 层 网络环境   镜像源 / 代理（国内用户必须优先配置）
  ↓
第 1 层 包管理器   brew(macOS) / scoop(Windows)
  ↓
第 2 层 基础运行时  node+npm / python3+pip3 / go / uv
  ↓
第 3 层 目标 CLI   gh / ffmpeg / clawhub / whisper / ...
  ↓
第 4 层 环境变量   OPENAI_API_KEY / GEMINI_API_KEY / ...

<工具名> --version  # 或等效验证命令

1. command -v brew → 存在？ → 直接使用 Homebrew
2. 不存在 → 安装 Homebrew（见手册第 1 层）
3. Homebrew 安装失败（网络超时等）→ 使用降级方案：
   - 基础运行时（node/python/go）→ 从官网下载 .pkg 安装包直接安装（见手册「降级方案」章节）
   - 其他 CLI 工具 → 暂无法安装，告知用户需先解决网络问题或手动安装 Homebrew

1. 检测已有包管理器（按优先级）：
   a. Get-Command scoop  → 存在？ → 使用 Scoop
   b. Get-Command winget → 存在？ → 使用 winget
   c. Get-Command choco  → 存在？ → 使用 Chocolatey
2. 全部不存在 → 安装 Scoop（首选，无需管理员权限）
3. Scoop 安装失败（网络超时）→ 降级方案：
   a. 尝试 Scoop 国内镜像安装（见手册第 1 层）
   b. 检测 winget 是否可用（Windows 11 预装）→ 用 winget
   c. 基础运行时（node/python/go）→ 从官网下载 .msi 安装包直接安装（见手册「降级方案」章节）
   d. 如果用户有管理员权限 → 尝试 Chocolatey