# Start_Windows - WebServer.ps1
# Run this script with:
#   Set-ExecutionPolicy Unrestricted -Scope Process; .\Start_Windows -WebServer.ps1

# --- Check for Node.js ---
if (-not (Get-Command node -ErrorAction SilentlyContinue)) {
    Write-Error "Node.js is not installed. Please install Node.js and try again."
    exit 1
}

# --- Define paths ---
$venvFolder       = "Borealis-Workflow-Automation-Tool"          # Virtual environment root.
$dataSource       = "Data"                                       # Contains server.py and optionally WebUI.
$dataDestination  = "$venvFolder\Borealis"                       # Data folder copy destination in the venv.
$customUIPath     = "$dataSource\WebUI"                          # Custom UI folder source in the project root.
$webUIDestination = "$venvFolder\web-interface"                  # Destination for the React UI in the venv.

# --- Create virtual environment if needed ---
if (!(Test-Path "$venvFolder\Scripts\Activate")) {
    Write-Output "Creating virtual environment in '$venvFolder'..."
    python -m venv $venvFolder
}

# --- Copy Data folder (includes server.py) ---
if (Test-Path $dataSource) {
    Write-Output "Copying Data folder into virtual environment..."
    if (Test-Path $dataDestination) {
        Remove-Item -Recurse -Force $dataDestination
    }
    New-Item -Path $dataDestination -ItemType Directory -Force | Out-Null
    Copy-Item -Path "$dataSource\*" -Destination $dataDestination -Recurse
} else {
    Write-Output "Warning: Data folder not found, skipping copy."
}

# --- React UI Deployment ---
# Check if the React UI folder exists in the virtual environment root.
if (-not (Test-Path $webUIDestination)) {
    Write-Output "React UI folder '$webUIDestination' not found. Generating default ReactJS app there..."
    npx create-react-app $webUIDestination
} else {
    Write-Output "React UI folder '$webUIDestination' already exists."
}

# If a custom UI folder exists at <ProjectRoot>\Data\WebUI, copy its contents over (overwrite defaults).
if (Test-Path $customUIPath) {
    Write-Output "Custom UI folder found at '$customUIPath'. Overwriting default React app with Borealis-related files..."
    Copy-Item -Path "$customUIPath\*" -Destination $webUIDestination -Recurse -Force
} else {
    Write-Output "No custom UI folder found at '$customUIPath'. Using default ReactJS app."
}

# --- Activate virtual environment ---
Write-Output "Activating virtual environment..."
. "$venvFolder\Scripts\Activate"

# --- Install Python dependencies ---
if (Test-Path "requirements.txt") {
    Write-Output "Installing Python dependencies..."
    pip install -q -r requirements.txt
} else {
    Write-Output "No requirements.txt found, skipping Python dependency installation."
}

# --- Build the React (UI) app in the web-interface folder if needed ---
$packageJsonPath = Join-Path $webUIDestination "package.json"
$buildFolder     = Join-Path $webUIDestination "build"
if (-not (Test-Path $buildFolder)) {
    if (Test-Path $packageJsonPath) {
        Write-Output "React UI build not found in '$webUIDestination'. Installing dependencies and building the React app..."
        Push-Location $webUIDestination
        npm install --no-fund --audit=false

        # Ensure react-flow-renderer is installed
        Write-Output "Installing React Flow..."
        npm install reactflow --no-fund --audit=false

        npm run build
        Pop-Location
    }
    else {
        Write-Output "No package.json found in '$webUIDestination'; skipping npm install/build."
    }
} else {
    Write-Output "React UI build found. Skipping npm install/build."
}

# --- Change directory to the virtual environment root ---
Push-Location $venvFolder
Write-Output "Current working directory: $(Get-Location)"
$expectedBuildPath = Join-Path (Get-Location) "web-interface\build"
Write-Output "Looking for build folder at: $expectedBuildPath"

# --- Start the Flask server (server.py is inside Borealis folder) ---
Write-Output "Starting the Flask server..."
python "Borealis\server.py"

# --- Return to original directory and deactivate virtual environment ---
Pop-Location
deactivate