# ==============================================================================
# SFI Coding Agent — Universal Installer for Windows (PowerShell)
# Product: SFI Agent by Shah Fahad Inc.
# URL: https://agent.shahfahadinc.com
# Usage: irm https://agent.shahfahadinc.com/install.ps1 | iex
# ==============================================================================

$ErrorActionPreference = "Stop"

Write-Host ""
Write-Host "=====================================================================" -ForegroundColor Cyan
Write-Host "        🚀 SFI Agent — Windows Workstation Installer" -ForegroundColor Green
Write-Host "        Connecting ChatGPT, Claude Desktop, and Gemini to your PC" -ForegroundColor Gray
Write-Host "=====================================================================" -ForegroundColor Cyan
Write-Host ""

$InstallDir = Join-Path $HOME ".sfi-agent"
$BinDir = Join-Path $HOME "AppData\Local\Microsoft\WindowsApps"
$RepoUrl = "https://github.com/ShahFahadIncCode/sfi-coding-agent.git"

# 1. Check Git
Write-Host "● Checking prerequisites..." -ForegroundColor Cyan
$gitAvailable = Get-Command git -ErrorAction SilentlyContinue

if (-not $gitAvailable) {
    Write-Host "⚠ Git was not found. Attempting installation via winget..." -ForegroundColor Yellow
    if (Get-Command winget -ErrorAction SilentlyContinue) {
        winget install --id Git.Git -e --source winget --accept-source-agreements --accept-package-agreements
        $env:Path = [System.Environment]::GetEnvironmentVariable("Path","Machine") + ";" + [System.Environment]::GetEnvironmentVariable("Path","User")
    } else {
        Write-Host "✖ Git is required. Please download and install Git from https://git-scm.com/download/win" -ForegroundColor Red
        Exit 1
    }
}
Write-Host "✔ Git is ready: $((git --version))" -ForegroundColor Green

# 2. Check Node.js
$nodeAvailable = Get-Command node -ErrorAction SilentlyContinue
if (-not $nodeAvailable) {
    Write-Host "⚠ Node.js was not found. Attempting installation via winget..." -ForegroundColor Yellow
    if (Get-Command winget -ErrorAction SilentlyContinue) {
        winget install --id OpenJS.NodeJS.LTS -e --source winget --accept-source-agreements --accept-package-agreements
        $env:Path = [System.Environment]::GetEnvironmentVariable("Path","Machine") + ";" + [System.Environment]::GetEnvironmentVariable("Path","User")
    } else {
        Write-Host "✖ Node.js (LTS >= 18) is required. Please install from https://nodejs.org" -ForegroundColor Red
        Exit 1
    }
}
Write-Host "✔ Node.js is ready: $((node -v))" -ForegroundColor Green

# 3. Check pnpm
$pnpmAvailable = Get-Command pnpm -ErrorAction SilentlyContinue
if (-not $pnpmAvailable) {
    Write-Host "● Installing pnpm package manager..." -ForegroundColor Cyan
    npm install -g pnpm
}
Write-Host "✔ pnpm is ready: $((pnpm --version))" -ForegroundColor Green

# 4. Clone or Update SFI Agent Repository
if (-not (Test-Path $InstallDir)) {
    New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
}

if (Test-Path (Join-Path $InstallDir ".git")) {
    Write-Host "`n● Updating existing SFI Agent installation..." -ForegroundColor Cyan
    Set-Location $InstallDir
    git fetch origin main
    git reset --hard origin/main
} else {
    Write-Host "`n● Downloading SFI Agent repository into $InstallDir..." -ForegroundColor Cyan
    git clone $RepoUrl $InstallDir
    Set-Location $InstallDir
}

# 5. Install Dependencies & Build
Write-Host "`n● Installing workspace dependencies..." -ForegroundColor Cyan
pnpm install --frozen-lockfile=false

Write-Host "`n● Compiling SFI MCP Gateway & Desktop Host..." -ForegroundColor Cyan
pnpm --filter @sfi/mcp build
pnpm --filter @sfi/desktop build

# 6. Install cloudflared.exe if missing
$cfAvailable = Get-Command cloudflared -ErrorAction SilentlyContinue
$cfTarget = Join-Path $BinDir "cloudflared.exe"
if (-not $cfAvailable -and -not (Test-Path $cfTarget)) {
    Write-Host "`n● Downloading cloudflared for 1-click Quick Tunnels..." -ForegroundColor Cyan
    try {
        Invoke-WebRequest -Uri "https://github.com/cloudflare/cloudflared/releases/latest/download/cloudflared-windows-amd64.exe" -OutFile $cfTarget
        Write-Host "✔ cloudflared.exe installed to $cfTarget" -ForegroundColor Green
    } catch {
        Write-Host "⚠ Note: cloudflared download skipped: $($_.Exception.Message)" -ForegroundColor Yellow
    }
}

# 7. Create Global Command Wrappers (sfi-host.cmd and sfi-host.ps1)
if (-not (Test-Path $BinDir)) {
    New-Item -ItemType Directory -Path $BinDir -Force | Out-Null
}

$cmdScript = @"
@echo off
node "$InstallDir\node_modules\tsx\dist\cli.mjs" "$InstallDir\apps\desktop\server.ts" %*
"@
Set-Content -Path (Join-Path $BinDir "sfi-host.cmd") -Value $cmdScript

$psScript = @"
node "$InstallDir\node_modules\tsx\dist\cli.mjs" "$InstallDir\apps\desktop\server.ts" `$args
"@
Set-Content -Path (Join-Path $BinDir "sfi-host.ps1") -Value $psScript

Write-Host ""
Write-Host "=====================================================================" -ForegroundColor Green
Write-Host "   ✔ SFI AGENT SUCCESSFULLY INSTALLED ON WINDOWS!" -ForegroundColor Green
Write-Host "=====================================================================" -ForegroundColor Green
Write-Host ""
Write-Host " Available Commands:" -ForegroundColor White
Write-Host "   sfi-host --web          Start the Web Host Control Center (http://localhost:5180)" -ForegroundColor Cyan
Write-Host "   sfi-host --sse          Start the MCP SSE Gateway on port 3333" -ForegroundColor Cyan
Write-Host "   sfi-host --tunnel       Start 1-click Cloudflare Quick Tunnel" -ForegroundColor Cyan
Write-Host "   sfi-host --help         Show help menu" -ForegroundColor Cyan
Write-Host ""
Write-Host " Quick Start:" -ForegroundColor White
Write-Host "   Open a new PowerShell window and run: sfi-host --web" -ForegroundColor Green
Write-Host ""