#!/usr/bin/env bash
set -euo pipefail

REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"
AGENT_DIR="$REPO_DIR/apps/device-agent"
SERVICE_FILE="$AGENT_DIR/systemd/timelapse-agent.service"

log() { echo "[install-agent] $*"; }

if [[ "$EUID" -ne 0 ]]; then
  echo "Please run as root: sudo bash apps/device-agent/scripts/install-agent.sh"
  exit 1
fi

log "Installing Python dependencies..."
python3 -m pip install --upgrade pip
python3 -m pip install requests

log "Creating /etc/timelapse/agent.env if missing..."
mkdir -p /etc/timelapse
if [[ ! -f /etc/timelapse/agent.env ]]; then
  cat > /etc/timelapse/agent.env <<'EOF'
TL_SERVER_URL=http://localhost:3001
TL_DEVICE_NAME=
TL_SERIAL_NO=
TL_HEARTBEAT_INTERVAL=30
TL_CLAIM_POLL_INTERVAL=10
TL_CONFIG_DIR=/boot/timelapse
EOF
  chmod 600 /etc/timelapse/agent.env
fi

log "Installing systemd service..."
cp "$SERVICE_FILE" /etc/systemd/system/timelapse-agent.service
systemctl daemon-reload
systemctl enable timelapse-agent.service
systemctl restart timelapse-agent.service

log "Done. Check status with:"
log "  systemctl status timelapse-agent.service"
log "  journalctl -u timelapse-agent.service -f"