# OpusGate - Claude Code auto-setup for Windows
# Usage:
#   irm https://opusgate.dev/install.ps1 | iex
#   $env:OPUSGATE_KEY = "sk-og-..."; irm https://opusgate.dev/install.ps1 | iex
$ErrorActionPreference = "Stop"
$ProgressPreference = "SilentlyContinue"
try { [Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls12 } catch {}

Write-Host ""
Write-Host "OpusGate - Claude Code setup" -ForegroundColor Cyan
Write-Host ""

# --- 1. API key ---------------------------------------------------------
$key = $env:OPUSGATE_KEY
if (-not $key) {
  $key = Read-Host "Paste your OpusGate API key (sk-og-..., from https://opusgate.dev/keys)"
}
$key = $key.Trim()
if ($key -notlike "sk-og-*") {
  Write-Host "That doesn't look like an OpusGate key (expected sk-og-...). Aborting." -ForegroundColor Red
  return
}

# --- 2. Claude Code -----------------------------------------------------
$bin = Join-Path $env:USERPROFILE ".local\bin"
$exe = Join-Path $bin "claude.exe"
if (Get-Command claude -ErrorAction SilentlyContinue) {
  Write-Host "Claude Code already installed - skipping install."
} elseif (Test-Path $exe) {
  # Installed but not on PATH yet (e.g. terminal not reopened after install).
  Write-Host "Claude Code found at $exe - skipping download, fixing PATH."
  $userPath = [Environment]::GetEnvironmentVariable("Path", "User")
  if (-not $userPath) { $userPath = "" }
  if (($userPath -split ";") -notcontains $bin) {
    [Environment]::SetEnvironmentVariable("Path", ($userPath.TrimEnd(";") + ";" + $bin), "User")
  }
  $env:PATH = "$env:PATH;$bin"
} else {
  # Primary path: download the official binary straight from Anthropic's
  # distribution bucket. Same binary the claude.ai installer fetches, but the
  # bucket is reachable in regions where claude.ai itself is geo-blocked.
  $bucket = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases"
  $arch = if ($env:PROCESSOR_ARCHITECTURE -eq "ARM64") { "win32-arm64" } else { "win32-x64" }
  $installed = $false
  try {
    $version = ([string](Invoke-RestMethod -TimeoutSec 30 "$bucket/stable")).Trim()
    $manifest = Invoke-RestMethod -TimeoutSec 30 "$bucket/$version/manifest.json"
    New-Item -ItemType Directory -Force -Path $bin | Out-Null
    Write-Host "Downloading Claude Code $version ($arch, ~220 MB)..." -ForegroundColor Yellow
    (New-Object Net.WebClient).DownloadFile("$bucket/$version/$arch/claude.exe", $exe)
    $expected = $manifest.platforms.$arch.checksum
    if ($expected) {
      $actual = (Get-FileHash $exe -Algorithm SHA256).Hash.ToLower()
      if ($actual -ne $expected.ToLower()) {
        Remove-Item $exe -Force
        throw "Checksum mismatch - corrupted download."
      }
    }
    $userPath = [Environment]::GetEnvironmentVariable("Path", "User")
    if (-not $userPath) { $userPath = "" }
    if (($userPath -split ";") -notcontains $bin) {
      [Environment]::SetEnvironmentVariable("Path", ($userPath.TrimEnd(";") + ";" + $bin), "User")
    }
    $env:PATH = "$env:PATH;$bin"
    $installed = $true
    Write-Host "Claude Code $version installed to $exe" -ForegroundColor Green
  } catch {
    Write-Host "Direct download failed: $($_.Exception.Message)" -ForegroundColor Yellow
    Write-Host "Trying the official installer (unavailable in some regions)..."
    try { irm https://claude.ai/install.ps1 | iex; $installed = $true } catch {}
  }
  if (-not $installed) {
    Write-Host "Could not install Claude Code automatically." -ForegroundColor Red
    Write-Host "If you have Node.js, run: npm install -g @anthropic-ai/claude-code - then re-run this script."
    return
  }
}

# --- 3. settings.json: merge into existing, or write fresh ---------------
$dir = Join-Path $env:USERPROFILE ".claude"
New-Item -ItemType Directory -Force -Path $dir | Out-Null
$settings = Join-Path $dir "settings.json"
$ogEnv = [ordered]@{
  "ANTHROPIC_BASE_URL"              = "https://api.opusgate.dev"
  "ANTHROPIC_AUTH_TOKEN"            = $key
  "ANTHROPIC_DEFAULT_OPUS_MODEL"    = "claude-opus-4.8"
  "ANTHROPIC_DEFAULT_SONNET_MODEL"  = "claude-sonnet-4.6"
  "ANTHROPIC_DEFAULT_HAIKU_MODEL"   = "claude-haiku-4.5"
  "DISABLE_TELEMETRY"               = "1"
  "DISABLE_ERROR_REPORTING"         = "1"
}
$written = $false
if (Test-Path $settings) {
  Copy-Item $settings "$settings.bak" -Force
  Write-Host "Existing settings.json backed up to settings.json.bak"
  try {
    $json = Get-Content $settings -Raw | ConvertFrom-Json
    if ($null -eq $json) { throw "empty file" }
    if (-not ($json.PSObject.Properties.Name -contains "env") -or $null -eq $json.env) {
      $json | Add-Member -MemberType NoteProperty -Name "env" -Value (New-Object PSObject) -Force
    }
    foreach ($k in $ogEnv.Keys) {
      $json.env | Add-Member -MemberType NoteProperty -Name $k -Value $ogEnv[$k] -Force
    }
    [IO.File]::WriteAllText($settings, ($json | ConvertTo-Json -Depth 32))
    $written = $true
    Write-Host "Merged OpusGate settings into your existing settings.json (other settings preserved)."
  } catch {
    Write-Host "Could not merge into existing settings.json - writing a fresh one (old file kept as .bak)." -ForegroundColor Yellow
  }
}
if (-not $written) {
  [IO.File]::WriteAllText($settings, @"
{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.opusgate.dev",
    "ANTHROPIC_AUTH_TOKEN": "$key",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "claude-opus-4.8",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "claude-sonnet-4.6",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "claude-haiku-4.5",
    "DISABLE_TELEMETRY": "1",
    "DISABLE_ERROR_REPORTING": "1"
  }
}
"@)
}

Write-Host ""
Write-Host "Done. Open a NEW terminal and run: claude" -ForegroundColor Green
Write-Host "Previously logged in with an Anthropic account? Run /logout inside claude once."
Write-Host "Models: /model inside Claude Code. Balance: https://opusgate.dev/dashboard"