#!/bin/bash
# start-daemon.sh — Start the live-status watcher daemon with proper config.
# This script is the canonical way to start the daemon. It loads env vars,
# ensures only one instance runs, and redirects logs properly.

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
LOG_FILE="${LIVESTATUS_LOG_FILE:-/tmp/status-watcher.log}"
PID_FILE="${PID_FILE:-/tmp/status-watcher.pid}"
ENV_FILE="${SCRIPT_DIR}/.env.daemon"

# Load .env.daemon if it exists
if [ -f "$ENV_FILE" ]; then
  set -a
  # shellcheck disable=SC1090
  source "$ENV_FILE"
  set +a
fi

# Required env vars with defaults
export MM_BOT_TOKEN="${MM_BOT_TOKEN:?MM_BOT_TOKEN is required}"
export MM_BASE_URL="${MM_BASE_URL:-https://slack.solio.tech}"
export MM_BOT_USER_ID="${MM_BOT_USER_ID:-eqtkymoej7rw7dp8xbh7hywzrr}"
export TRANSCRIPT_DIR="${TRANSCRIPT_DIR:-/root/.openclaw/agents}"
export LOG_LEVEL="${LOG_LEVEL:-info}"
export IDLE_TIMEOUT_S="${IDLE_TIMEOUT_S:-60}"
export SESSION_POLL_MS="${SESSION_POLL_MS:-2000}"
export MAX_ACTIVE_SESSIONS="${MAX_ACTIVE_SESSIONS:-20}"
export MAX_STATUS_LINES="${MAX_STATUS_LINES:-20}"
export HEALTH_PORT="${HEALTH_PORT:-9090}"
export PID_FILE
export OFFSET_FILE="${OFFSET_FILE:-/tmp/status-watcher-offsets.json}"

# Plugin config (optional but recommended)
export PLUGIN_ENABLED="${PLUGIN_ENABLED:-true}"
export PLUGIN_URL="${PLUGIN_URL:-https://slack.solio.tech/plugins/com.openclaw.livestatus}"
export PLUGIN_SECRET="${PLUGIN_SECRET:-}"

# Kill existing daemon if running
if [ -f "$PID_FILE" ]; then
  OLD_PID=$(cat "$PID_FILE" 2>/dev/null || true)
  if [ -n "$OLD_PID" ] && kill -0 "$OLD_PID" 2>/dev/null; then
    echo "Stopping existing daemon (PID $OLD_PID)..."
    kill "$OLD_PID" 2>/dev/null || true
    sleep 1
  fi
  rm -f "$PID_FILE"
fi

# Start daemon with proper logging
echo "Starting status watcher daemon..."
echo "  Log file: $LOG_FILE"
echo "  PID file: $PID_FILE"
echo "  Plugin: ${PLUGIN_ENABLED} (${PLUGIN_URL:-not configured})"

cd "$SCRIPT_DIR"
node src/watcher-manager.js start >> "$LOG_FILE" 2>&1 &
DAEMON_PID=$!

# Wait for PID file
for i in $(seq 1 10); do
  if [ -f "$PID_FILE" ]; then
    echo "Daemon started (PID $(cat "$PID_FILE"))"
    exit 0
  fi
  sleep 0.5
done

# Check if process is still running
if kill -0 "$DAEMON_PID" 2>/dev/null; then
  echo "Daemon started (PID $DAEMON_PID) but PID file not created yet"
  exit 0
else
  echo "ERROR: Daemon failed to start. Check $LOG_FILE"
  tail -20 "$LOG_FILE" 2>/dev/null
  exit 1
fi