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

PROJECT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
VENV_PYTHON="$PROJECT_DIR/.venv/bin/python"
PID_FILE="$PROJECT_DIR/runtime/service.pid"
LOG_FILE="$PROJECT_DIR/logs/service.log"

if [[ ! -x "$VENV_PYTHON" ]]; then
  echo "Python environment missing. Run ./scripts/setup.sh first." >&2
  exit 1
fi
if [[ -f "$PID_FILE" ]]; then
  EXISTING_PID="$(tr -dc '0-9' < "$PID_FILE")"
  if [[ -n "$EXISTING_PID" ]] && kill -0 "$EXISTING_PID" 2>/dev/null; then
    echo "Service already running (PID $EXISTING_PID)."
    exit 0
  fi
fi

mkdir -p "$PROJECT_DIR/runtime" "$PROJECT_DIR/logs"
cd "$PROJECT_DIR"
"$VENV_PYTHON" -m data_query_agent --check-config
nohup "$VENV_PYTHON" -m data_query_agent >>"$LOG_FILE" 2>&1 &
SERVICE_PID=$!
printf '%s\n' "$SERVICE_PID" > "$PID_FILE"
sleep 1
if ! kill -0 "$SERVICE_PID" 2>/dev/null; then
  echo "Service failed to start. Check $LOG_FILE" >&2
  exit 1
fi
echo "Service started (PID $SERVICE_PID). Log: $LOG_FILE"