#!/bin/bash
# shellcheck disable=SC1091
source "${AGENT_PATH}/common.sh"
_check_required_env_vars "CONTAINER_NAME" "RELAY_PORT"

# Check LXC is available
if ! command -v lxc &>/dev/null; then
    _die "LXC is not installed."
fi

echo "Starting Tailscale Relay container..."

# Check container exists
if ! lxc info "${CONTAINER_NAME}" &>/dev/null; then
    _die "Container ${CONTAINER_NAME} does not exist. Run install.sh first."
fi

# Start if not already running
if lxc info "${CONTAINER_NAME}" 2>/dev/null | grep -q "Status: RUNNING"; then
    echo "Container is already running."
else
    lxc start "${CONTAINER_NAME}" || _die "Failed to start container"
    sleep 3
fi

# Wait for tailscaled to be ready
echo "Waiting for Tailscale daemon..."
for i in $(seq 1 15); do
    if lxc exec "${CONTAINER_NAME}" -- tailscale status &>/dev/null; then
        break
    fi
    sleep 1
done

# Ensure relay is enabled
lxc exec "${CONTAINER_NAME}" -- tailscale set --relay-server-port="${RELAY_PORT}" 2>/dev/null || true

CONTAINER_IP="${STATIC_IP%%/*}"
TAILSCALE_IP=$(lxc exec "${CONTAINER_NAME}" -- tailscale ip -4 2>/dev/null || echo "not yet available")

echo ""
echo "Tailscale Relay started."
echo "  LAN IP:       ${CONTAINER_IP}"
echo "  Tailscale IP: ${TAILSCALE_IP}"
echo "  Relay port:   ${RELAY_PORT}/udp"