# ============================================================
# 修复 Windows Hypervisor 未加载（Docker Desktop 依赖）
# 必须以管理员身份运行（UAC 弹窗后自动提权）
# 动作：
#   1. bcdedit 开启 hypervisorlaunchtype auto
#   2. 备份原 BCD 到 C:\bcd-backup
#   3. 输出修复日志到 C:\hypervisor_fix_log.txt
#   4. 提示用户重启（不自动重启）
# ============================================================
$ErrorActionPreference = 'Continue'
$log = 'C:\hypervisor_fix_log.txt'
"=== Hypervisor Fix $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') ===" | Out-File $log -Encoding utf8

function Log($m) {
    $m | Tee-Object -FilePath $log -Append
}

# 必须管理员
$isAdmin = ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
if (-not $isAdmin) {
    Log "ERROR: not running as admin - relaunching elevated..."
    Start-Process pwsh -Verb RunAs -ArgumentList "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`""
    exit
}

# 1. 备份 BCD
Log "[1/3] Backing up BCD to C:\bcd-backup ..."
bcdedit /export C:\bcd-backup 2>&1 | Out-Null
if (Test-Path C:\bcd-backup) { Log "  backup OK" } else { Log "  backup FAILED (continuing)" }

# 2. 读取当前状态
Log "[2/3] Current hypervisorlaunchtype:"
$current = bcdedit /enum '{current}' 2>&1 | Select-String 'hypervisorlaunchtype'
if ($current) { Log ("  " + $current.ToString().Trim()) } else { Log "  (not present -> defaults to OFF on some installs)" }

# 3. 设置 auto
Log "[3/3] Setting hypervisorlaunchtype auto ..."
$out = bcdedit /set '{current}' hypervisorlaunchtype auto 2>&1
Log ("  " + ($out -join ' '))

# 验证
$after = bcdedit /enum '{current}' 2>&1 | Select-String 'hypervisorlaunchtype'
if ($after -match 'auto') {
    Log "SUCCESS: hypervisorlaunchtype is now Auto"
    Log ""
    Log ">>> 请重启电脑使 Hypervisor 生效 <<<"
} else {
    Log "VERIFY FAILED: $after"
}

Log ""
Log "Press Enter to close..."
Read-Host | Out-Null