# start.ps1 — Siemens RAGAS Console launcher for Windows PowerShell
# Usage: Right-click -> "Run with PowerShell", or: powershell -ExecutionPolicy Bypass -File start.ps1

$ErrorActionPreference = "Stop"
Set-Location $PSScriptRoot

Write-Host ""
Write-Host "============================================================" -ForegroundColor Cyan
Write-Host "  Siemens RAGAS Console  -  Starting..." -ForegroundColor Cyan
Write-Host "============================================================" -ForegroundColor Cyan
Write-Host ""
Write-Host "Working directory: $PSScriptRoot"
Write-Host ""

# ----------------------------------------------------------------
# 1. Check Python
# ----------------------------------------------------------------
try {
    $pyver = & python --version 2>&1
    Write-Host "[OK] $pyver" -ForegroundColor Green
} catch {
    Write-Host "[ERROR] Python not found. Please install Python 3.12+ and add to PATH." -ForegroundColor Red
    Read-Host "Press Enter to exit"
    exit 1
}

# ----------------------------------------------------------------
# 2. Check FastAPI / uvicorn
# ----------------------------------------------------------------
$check = & python -c "import fastapi, uvicorn" 2>&1
if ($LASTEXITCODE -ne 0) {
    Write-Host "[INFO] Installing fastapi and uvicorn..." -ForegroundColor Yellow
    & pip install fastapi uvicorn --quiet
    if ($LASTEXITCODE -ne 0) {
        Write-Host "[ERROR] Failed to install fastapi/uvicorn. Run: pip install fastapi uvicorn" -ForegroundColor Red
        Read-Host "Press Enter to exit"
        exit 1
    }
    Write-Host "[OK] fastapi / uvicorn installed." -ForegroundColor Green
} else {
    Write-Host "[OK] fastapi / uvicorn ready." -ForegroundColor Green
}

# ----------------------------------------------------------------
# 3. Check ragas version
# ----------------------------------------------------------------
$check = & python -c "import ragas; assert ragas.__version__ == '0.4.3', ragas.__version__" 2>&1
if ($LASTEXITCODE -ne 0) {
    Write-Host "[INFO] Installing ragas==0.4.3 (evaluation engine)..." -ForegroundColor Yellow
    & pip install "ragas==0.4.3" --quiet
    if ($LASTEXITCODE -ne 0) {
        Write-Host "[WARN] ragas install failed. Dashboard works; evaluation trigger will show error." -ForegroundColor Yellow
    } else {
        Write-Host "[OK] ragas 0.4.3 installed." -ForegroundColor Green
    }
} else {
    Write-Host "[OK] ragas 0.4.3 ready." -ForegroundColor Green
}

# ----------------------------------------------------------------
# 4. Seed demo data if missing
# ----------------------------------------------------------------
if (-not (Test-Path "outputs\kba-knowledge-base-offline-baseline")) {
    Write-Host "[INFO] No run data found. Generating demo data..." -ForegroundColor Yellow
    & python scripts\seed_sample_run.py
    if ($LASTEXITCODE -ne 0) {
        Write-Host "[WARN] Demo data generation failed. Dashboard may be empty." -ForegroundColor Yellow
    } else {
        Write-Host "[OK] Demo data generated." -ForegroundColor Green
    }
} else {
    Write-Host "[OK] Run data found, skipping demo generation." -ForegroundColor Green
}

# ----------------------------------------------------------------
# 5. Pick an available port
# ----------------------------------------------------------------
$PORT = 8800
$inUse = netstat -ano 2>$null | Select-String ":$PORT\s" | Select-String "LISTENING"
if ($inUse) {
    Write-Host "[WARN] Port $PORT in use, trying 8801..." -ForegroundColor Yellow
    $PORT = 8801
    $inUse = netstat -ano 2>$null | Select-String ":$PORT\s" | Select-String "LISTENING"
    if ($inUse) {
        Write-Host "[ERROR] Ports 8800 and 8801 are both in use." -ForegroundColor Red
        Write-Host "        Run manually: python webmain.py --port 8802"
        Read-Host "Press Enter to exit"
        exit 1
    }
}

Write-Host ""
Write-Host "============================================================" -ForegroundColor Cyan
Write-Host "  Console URL : http://127.0.0.1:$PORT" -ForegroundColor Green
Write-Host "  Press Ctrl+C to stop the server" -ForegroundColor Cyan
Write-Host "============================================================" -ForegroundColor Cyan
Write-Host ""

# Open browser after 2-second delay
Start-Job -ScriptBlock {
    param($port)
    Start-Sleep 2
    Start-Process "http://127.0.0.1:$port"
} -ArgumentList $PORT | Out-Null

# Launch uvicorn (blocking)
& python webmain.py --host 127.0.0.1 --port $PORT

Write-Host ""
Write-Host "Server stopped."
Read-Host "Press Enter to exit"