$ErrorActionPreference = "Stop"

$BaseUrl = "https://code.aiserverai.online/v1"
$NodeMirror = "https://npmmirror.com/mirrors/node"
$NpmMirror = "https://registry.npmmirror.com"
$SupportEmail = "alexisty233@gmail.com"
$InstallRoot = Join-Path $env:LOCALAPPDATA "Programs"
$NodeRoot = Join-Path $InstallRoot "nodejs-codex"
$CodexPrefix = Join-Path $InstallRoot "codex-npm"
$CodexHomeDir = Join-Path $HOME ".codex"
$TempDir = Join-Path ([System.IO.Path]::GetTempPath()) ("codex-install-" + [Guid]::NewGuid().ToString("N"))

Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing

function Show-Result {
  param(
    [string]$Title,
    [string]$Message,
    [System.Windows.Forms.MessageBoxIcon]$Icon
  )
  [System.Windows.Forms.MessageBox]::Show(
    $Message,
    $Title,
    [System.Windows.Forms.MessageBoxButtons]::OK,
    $Icon
  ) | Out-Null
}

function Read-ApiKey {
  $form = New-Object System.Windows.Forms.Form
  $form.Text = "Codex 一键配置"
  $form.StartPosition = "CenterScreen"
  $form.ClientSize = New-Object System.Drawing.Size(480, 170)
  $form.FormBorderStyle = "FixedDialog"
  $form.MaximizeBox = $false
  $form.MinimizeBox = $false

  $label = New-Object System.Windows.Forms.Label
  $label.Text = "请输入你的 Sub2API Key"
  $label.AutoSize = $true
  $label.Location = New-Object System.Drawing.Point(24, 22)
  $form.Controls.Add($label)

  $input = New-Object System.Windows.Forms.TextBox
  $input.Location = New-Object System.Drawing.Point(24, 52)
  $input.Size = New-Object System.Drawing.Size(430, 28)
  $input.UseSystemPasswordChar = $true
  $form.Controls.Add($input)

  $ok = New-Object System.Windows.Forms.Button
  $ok.Text = "继续"
  $ok.DialogResult = [System.Windows.Forms.DialogResult]::OK
  $ok.Location = New-Object System.Drawing.Point(286, 105)
  $form.Controls.Add($ok)

  $cancel = New-Object System.Windows.Forms.Button
  $cancel.Text = "取消"
  $cancel.DialogResult = [System.Windows.Forms.DialogResult]::Cancel
  $cancel.Location = New-Object System.Drawing.Point(379, 105)
  $form.Controls.Add($cancel)

  $form.AcceptButton = $ok
  $form.CancelButton = $cancel
  $form.Add_Shown({ $input.Select() })

  if ($form.ShowDialog() -ne [System.Windows.Forms.DialogResult]::OK) {
    throw "用户取消了 Key 输入"
  }
  if ([string]::IsNullOrWhiteSpace($input.Text)) {
    throw "API Key 不能为空"
  }
  return $input.Text.Trim()
}

function Add-UserPath {
  param([string]$Directory)
  $current = [Environment]::GetEnvironmentVariable("Path", "User")
  $parts = @($current -split ";" | Where-Object { $_ })
  if ($parts -notcontains $Directory) {
    $updated = (@($Directory) + $parts) -join ";"
    [Environment]::SetEnvironmentVariable("Path", $updated, "User")
  }
  if (($env:Path -split ";") -notcontains $Directory) {
    $env:Path = "$Directory;$env:Path"
  }
}

function Ensure-Node {
  $npm = Get-Command npm.cmd -ErrorAction SilentlyContinue
  $node = Get-Command node.exe -ErrorAction SilentlyContinue
  if ($npm -and $node) {
    $nodeMajor = [int](& node.exe -p "process.versions.node.split('.')[0]")
    if ($nodeMajor -ge 20) {
      return
    }
  }

  Write-Host "正在安装 Node.js LTS..."
  try {
    $releases = Invoke-RestMethod -Uri "$NodeMirror/index.json"
  }
  catch {
    $releases = Invoke-RestMethod -Uri "https://nodejs.org/dist/index.json"
  }
  $release = $releases | Where-Object { $_.lts } | Select-Object -First 1
  if (-not $release) {
    throw "无法获取 Node.js LTS 版本"
  }

  $version = $release.version
  $arch = if ($env:PROCESSOR_ARCHITECTURE -eq "ARM64") { "arm64" } else { "x64" }
  $archiveName = "node-$version-win-$arch.zip"
  $archivePath = Join-Path $TempDir $archiveName
  $extractPath = Join-Path $TempDir "node"
  $versionHome = Join-Path $NodeRoot "$version-$arch"

  New-Item -ItemType Directory -Force -Path $TempDir, $NodeRoot | Out-Null
  try {
    Invoke-WebRequest -UseBasicParsing -Uri "$NodeMirror/$version/$archiveName" -OutFile $archivePath
  }
  catch {
    Invoke-WebRequest -UseBasicParsing -Uri "https://nodejs.org/dist/$version/$archiveName" -OutFile $archivePath
  }
  try {
    $checksumText = (Invoke-WebRequest -UseBasicParsing -Uri "$NodeMirror/$version/SHASUMS256.txt").Content
  }
  catch {
    $checksumText = (Invoke-WebRequest -UseBasicParsing -Uri "https://nodejs.org/dist/$version/SHASUMS256.txt").Content
  }
  $checksumLine = $checksumText -split "[\r\n]+" | Where-Object { $_ -match ("^[a-fA-F0-9]{64}[ ]+" + [regex]::Escape($archiveName) + "$") } | Select-Object -First 1
  if (-not $checksumLine) {
    throw "无法校验 Node.js 安装包"
  }
  $expectedHash = ($checksumLine -split "[ ]+")[0].ToLowerInvariant()
  $actualHash = (Get-FileHash -Algorithm SHA256 -Path $archivePath).Hash.ToLowerInvariant()
  if ($expectedHash -ne $actualHash) {
    throw "Node.js 安装包校验失败"
  }
  Expand-Archive -Path $archivePath -DestinationPath $extractPath -Force
  if (-not (Test-Path $versionHome)) {
    $expanded = Get-ChildItem -Path $extractPath -Directory | Select-Object -First 1
    Move-Item -Path $expanded.FullName -Destination $versionHome
  }
  Add-UserPath $versionHome
}

function Write-CodexConfig {
  New-Item -ItemType Directory -Force -Path $CodexHomeDir | Out-Null
  $stamp = Get-Date -Format "yyyyMMdd-HHmmss"
  $mainConfig = Join-Path $CodexHomeDir "config.toml"

  if (Test-Path $mainConfig) {
    Copy-Item $mainConfig "$mainConfig.backup-$stamp"
  }

  $existingLines = @()
  if (Test-Path $mainConfig) {
    $skipProvider = $false
    $inTable = $false
    foreach ($line in Get-Content $mainConfig) {
      if ($line -match '^\[') {
        $inTable = $true
        $skipProvider = $line -match '^\[model_providers\.aiserver(\.|\])'
      }
      if ($skipProvider) {
        continue
      }
      if (-not $inTable -and $line -match '^\s*(profile|model|model_provider|model_reasoning_effort)\s*=') {
        continue
      }
      $existingLines += $line
    }
  }
  $managedConfig = @'
model = "gpt-5.6-sol"
model_provider = "aiserver"
model_reasoning_effort = "medium"
'@
  $providerConfig = @'

[model_providers.aiserver]
name = "AIServer"
base_url = "https://code.aiserverai.online/v1"
wire_api = "responses"
requires_openai_auth = true
'@
  $mainText = (@($managedConfig.TrimEnd()) + $existingLines + @($providerConfig.TrimEnd())) -join [Environment]::NewLine
  $utf8 = New-Object System.Text.UTF8Encoding($false)
  [IO.File]::WriteAllText($mainConfig, $mainText + [Environment]::NewLine, $utf8)
}

function Test-CodexCli {
  param([string]$CodexBin)
  if (-not (Test-Path $CodexBin)) {
    return $false
  }
  & $CodexBin --version *> $null
  return $LASTEXITCODE -eq 0
}

try {
  New-Item -ItemType Directory -Force -Path $TempDir, $CodexPrefix | Out-Null
  Ensure-Node
  Add-UserPath $CodexPrefix

  Write-Host "正在安装 Codex CLI..."
  $NpmCache = Join-Path $CodexPrefix "cache"
  $CodexBin = Join-Path $CodexPrefix "codex.cmd"
  New-Item -ItemType Directory -Force -Path $NpmCache | Out-Null
  & npm.cmd install -g --prefix $CodexPrefix --cache=$NpmCache --registry=$NpmMirror --include=optional --no-audit --no-fund "@openai/codex@latest"
  if ($LASTEXITCODE -ne 0 -or -not (Test-CodexCli $CodexBin)) {
    Write-Host "中国 npm 镜像安装不完整，正在使用官方源修复..."
    & npm.cmd install -g --force --prefix $CodexPrefix --cache=$NpmCache --registry="https://registry.npmjs.org" --include=optional --no-audit --no-fund "@openai/codex@latest"
  }
  if ($LASTEXITCODE -ne 0 -or -not (Test-CodexCli $CodexBin)) {
    throw "Codex CLI 或当前 Windows 架构对应的原生组件安装未完成"
  }

  $ApiKey = Read-ApiKey
  Invoke-WebRequest -UseBasicParsing -Uri "$BaseUrl/models" -Headers @{ Authorization = "Bearer $ApiKey" } -Method Get | Out-Null
  Write-CodexConfig
  $ApiKey | & $CodexBin login --with-api-key | Out-Null
  $ApiKey = $null

  Show-Result "配置完成" "Codex 已安装并完成 AIServer 配置。打开新的 PowerShell，进入项目目录运行 codex 即可。" ([System.Windows.Forms.MessageBoxIcon]::Information)
}
catch {
  $supportMessage = $_.Exception.Message + [Environment]::NewLine + [Environment]::NewLine + "请附完整失败截图联系管理员：$SupportEmail" + [Environment]::NewLine + "我们会在 72 小时内更新脚本，请更新后重试。"
  Show-Result "Codex 安装失败" $supportMessage ([System.Windows.Forms.MessageBoxIcon]::Error)
  Write-Error $_
  exit 1
}
finally {
  $ApiKey = $null
  if (Test-Path $TempDir) {
    Remove-Item -Recurse -Force $TempDir
  }
}