# 自动下载安装 NSIS
$ErrorActionPreference = "Stop"

Write-Host "==> 检查 NSIS 是否已安装..." -ForegroundColor Cyan
$existingNsis = Get-Command makensis.exe -ErrorAction SilentlyContinue
if ($existingNsis) {
    Write-Host "    NSIS 已安装: $($existingNsis.Source)" -ForegroundColor Green
    Write-Host "    跳过安装，可以直接执行打包命令。" -ForegroundColor Yellow
    exit 0
}

$nsisVersion = "3.10"
$nsisUrl = "https://sourceforge.net/projects/nsis/files/NSIS%203/$nsisVersion/nsis-$nsisVersion-setup.exe/download"
$installerPath = "$env:TEMP\nsis-$nsisVersion-setup.exe"

Write-Host "==> 下载 NSIS $nsisVersion 安装程序..." -ForegroundColor Cyan
Write-Host "    从: $nsisUrl" -ForegroundColor Gray
Write-Host "    到: $installerPath" -ForegroundColor Gray

try {
    $ProgressPreference = 'SilentlyContinue'
    Invoke-WebRequest -Uri $nsisUrl -OutFile $installerPath -UseBasicParsing -TimeoutSec 300
    Write-Host "    下载完成 ($('{0:N2}' -f ((Get-Item $installerPath).Length / 1MB)) MB)" -ForegroundColor Green
} catch {
    Write-Host "    下载失败: $($_.Exception.Message)" -ForegroundColor Red
    Write-Host ""
    Write-Host "请手动下载并安装 NSIS：" -ForegroundColor Yellow
    Write-Host "  1. 访问: https://nsis.sourceforge.io/Download" -ForegroundColor Cyan
    Write-Host "  2. 下载 NSIS 3.10 或更高版本" -ForegroundColor Cyan
    Write-Host "  3. 运行安装程序（默认安装路径即可）" -ForegroundColor Cyan
    exit 1
}

Write-Host ""
Write-Host "==> 正在安装 NSIS..." -ForegroundColor Cyan
Write-Host "    安装位置: C:\Program Files (x86)\NSIS" -ForegroundColor Gray
Write-Host "    (如果弹出 UAC 提示，请点击'是'授权)" -ForegroundColor Yellow

try {
    Start-Process -FilePath $installerPath -ArgumentList "/S" -Wait -Verb RunAs
    Write-Host "    安装完成" -ForegroundColor Green
} catch {
    Write-Host "    安装失败: $($_.Exception.Message)" -ForegroundColor Red
    Write-Host "    请手动运行: $installerPath" -ForegroundColor Yellow
    exit 1
}

Write-Host ""
Write-Host "==> 清理临时文件..." -ForegroundColor Cyan
Remove-Item $installerPath -Force -ErrorAction SilentlyContinue

Write-Host ""
Write-Host "==> NSIS 安装完成！" -ForegroundColor Green
Write-Host ""
Write-Host "下一步操作：" -ForegroundColor Yellow
Write-Host "  1. 关闭当前 PowerShell 窗口" -ForegroundColor Cyan
Write-Host "  2. 重新打开 PowerShell（让 PATH 环境变量生效）" -ForegroundColor Cyan
Write-Host "  3. 执行打包命令: .\打包.bat -Installer" -ForegroundColor Cyan
Write-Host ""
Write-Host "打包完成后，安装包会在 build\bin\ 目录，文件名带时间戳" -ForegroundColor Gray