lf_mri_platform/install.ps1

# ==============================================================================
#  lf_mri_platform — One-time installation script
#  Run as: .\install.ps1
#  Requires: Windows 10/11, PowerShell 5.1+, internet access
# ==============================================================================
param(
    [string]$PythonExe = "python",
    [string]$GuiDir    = "..\lf_mri\MRI-testing\lf_mri_gui",
    [string]$RepoRoot  = "..\lf_mri\MRI-testing"
)

$ErrorActionPreference = "Stop"

function Write-Step($msg) { Write-Host "`n==> $msg" -ForegroundColor Cyan }
function Write-OK($msg)   { Write-Host "    [OK] $msg" -ForegroundColor Green }
function Write-Warn($msg) { Write-Host "    [!!] $msg" -ForegroundColor Yellow }
function Write-Fail($msg) { Write-Host "    [FAIL] $msg" -ForegroundColor Red; exit 1 }

# ── 1. Check prerequisites ────────────────────────────────────────────────────
Write-Step "Checking prerequisites"

# Python
try {
    $pyVer = & $PythonExe --version 2>&1
    if ($pyVer -match "3\.(1[0-9]|[0-9]+)") {
        Write-OK "Python: $pyVer"
    } else {
        Write-Fail "Python 3.10+ required, found: $pyVer"
    }
} catch {
    Write-Fail "Python not found. Install from https://python.org (add to PATH)"
}

# Docker
try {
    $dockerVer = & docker --version 2>&1
    Write-OK "Docker: $dockerVer"
} catch {
    Write-Warn "Docker not found — services (orchestrator, seq_interp, etc.) won't start."
    Write-Warn "Install Docker Desktop: https://www.docker.com/products/docker-desktop/"
}

# Docker Compose
try {
    $composeVer = & docker compose version 2>&1
    Write-OK "Docker Compose: $composeVer"
} catch {
    Write-Warn "Docker Compose not found (included in Docker Desktop >= 3.0)"
}

# ── 2. Create Python virtual environment for the GUI ─────────────────────────
Write-Step "Creating Python virtual environment"

$venvPath = Join-Path $GuiDir ".venv"
$absGuiDir = Resolve-Path $GuiDir -ErrorAction SilentlyContinue
if (-not $absGuiDir) { Write-Fail "GUI directory not found: $GuiDir" }

if (Test-Path $venvPath) {
    Write-Warn "Venv already exists at $venvPath — skipping creation"
} else {
    & $PythonExe -m venv $venvPath
    Write-OK "Created venv at $venvPath"
}

$pip = Join-Path $venvPath "Scripts\pip.exe"

# ── 3. Install GUI dependencies ───────────────────────────────────────────────
Write-Step "Installing GUI dependencies"

# Install root requirements first (numpy, scipy, etc.)
$rootReqs = Join-Path $RepoRoot "requirements.txt"
if (Test-Path $rootReqs) {
    & $pip install -r $rootReqs --quiet
    Write-OK "Root requirements installed"
}

# Install GUI-specific requirements
$guiReqs = Join-Path $GuiDir "requirements.txt"
if (Test-Path $guiReqs) {
    & $pip install -r $guiReqs --quiet
    Write-OK "GUI requirements installed"
}

# Install LF_scanner as editable package
$lfScannerSetup = Join-Path $RepoRoot "LF_scanner\setup.py"
if (Test-Path $lfScannerSetup) {
    & $pip install -e (Join-Path $RepoRoot "LF_scanner") --quiet
    Write-OK "LF_scanner installed (editable)"
} else {
    Write-Warn "LF_scanner/setup.py not found — skipping"
}

# ── 4. Copy .env for Docker services ─────────────────────────────────────────
Write-Step "Setting up Docker environment config"

$envFile    = Join-Path $PSScriptRoot ".env"
$envExample = Join-Path $PSScriptRoot ".env.example"

if (-not (Test-Path $envFile)) {
    Copy-Item $envExample $envFile
    Write-OK ".env created from .env.example"
} else {
    Write-Warn ".env already exists — not overwriting"
}

# ── 5. Create desktop shortcut ────────────────────────────────────────────────
Write-Step "Creating desktop shortcuts"

$desktopPath = [Environment]::GetFolderPath("Desktop")
$pythonExePath = Join-Path $venvPath "Scripts\python.exe"
$appScript = Resolve-Path (Join-Path $GuiDir "app.py")

# Shortcut: Start GUI only
$wsh = New-Object -ComObject WScript.Shell
$sc = $wsh.CreateShortcut("$desktopPath\LF-MRI GUI.lnk")
$sc.TargetPath  = $pythonExePath
$sc.Arguments   = "`"$appScript`""
$sc.WorkingDirectory = (Resolve-Path $RepoRoot).Path
$sc.Description = "LF-MRI System GUI"
$sc.Save()
Write-OK "Shortcut: 'LF-MRI GUI.lnk' on Desktop"

# Shortcut: Start all (services + GUI)
$startAll = Resolve-Path (Join-Path $PSScriptRoot "start.ps1")
$scAll = $wsh.CreateShortcut("$desktopPath\LF-MRI Start All.lnk")
$scAll.TargetPath       = "powershell.exe"
$scAll.Arguments        = "-ExecutionPolicy Bypass -File `"$startAll`""
$scAll.WorkingDirectory = $PSScriptRoot
$scAll.Description      = "Start LF-MRI services + GUI"
$scAll.Save()
Write-OK "Shortcut: 'LF-MRI Start All.lnk' on Desktop"

# ── 6. Summary ────────────────────────────────────────────────────────────────
Write-Host ""
Write-Host "============================================================" -ForegroundColor Green
Write-Host "  Installation complete!" -ForegroundColor Green
Write-Host "============================================================" -ForegroundColor Green
Write-Host ""
Write-Host "  Next steps:"
Write-Host "  1. Start all services + GUI:  .\start.ps1"
Write-Host "  2. GUI only (no services):    .\start.ps1 -GuiOnly"
Write-Host "  3. Stop services:             .\stop.ps1"
Write-Host ""
Write-Host "  Config: edit .env to change ports or switch mode (plug/real)"
Write-Host ""