#!/bin/bash
set -e

# VM Bench Backend — Installer for Proxmox host (srv2)
# Run:  bash /mnt/converter/backend/install.sh

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SERVICE_NAME="vm-bench-backend"
SERVICE_FILE="${SCRIPT_DIR}/${SERVICE_NAME}.service"
SYSTEMD_DIR="/etc/systemd/system"

echo "=== VM Bench Backend Installer ==="
echo ""

# 1. Install Python dependencies
echo "[1/4] Installing Python dependencies..."
cd "$SCRIPT_DIR"
python3 -m pip install --break-system-packages -r requirements.txt -q
echo "  Dependencies installed."

# 2. Copy systemd service file
echo "[2/4] Installing systemd service..."
if [ ! -f "$SERVICE_FILE" ]; then
    echo "  ERROR: ${SERVICE_FILE} not found."
    exit 1
fi
cp "$SERVICE_FILE" "$SYSTEMD_DIR/${SERVICE_NAME}.service"
echo "  Service file copied to ${SYSTEMD_DIR}/"

# 3. Reload systemd and enable
echo "[3/4] Enabling service..."
systemctl daemon-reload
systemctl enable "$SERVICE_NAME"
echo "  Service enabled (auto-start on boot)."

# 4. Start the service
echo "[4/4] Starting service..."
systemctl restart "$SERVICE_NAME"
sleep 2

# Verify
if systemctl is-active --quiet "$SERVICE_NAME"; then
    echo ""
    echo "  Backend is RUNNING on port 9000"
    echo ""
    echo "  Check:  curl http://127.0.0.1:9000/health"
    echo "  Logs:   journalctl -u ${SERVICE_NAME} -f"
else
    echo ""
    echo "  WARNING: Service did not start. Check logs:"
    echo "  journalctl -u ${SERVICE_NAME} -n 30"
    exit 1
fi

echo ""
echo "=== Done ==="