#!/usr/bin/env bash
# wacli-daemon — manage "wacli sync --follow" as a background daemon.
# Usage: wacli-daemon {start|stop|status}

set -euo pipefail

WACLI_DIR="${HOME}/.wacli"
PIDFILE="${WACLI_DIR}/sync.pid"
LOGFILE="${WACLI_DIR}/sync.log"

_is_running() {
    [ -f "$PIDFILE" ] && kill -0 "$(cat "$PIDFILE")" 2>/dev/null
}

case "${1:-}" in
    start)
        if _is_running; then
            echo "already running (PID $(cat "$PIDFILE"))"
            exit 0
        fi
        rm -f "$PIDFILE"
        nohup wacli sync --follow >> "$LOGFILE" 2>&1 &
        echo $! > "$PIDFILE"
        # Wait briefly and verify it actually started
        sleep 2
        if _is_running; then
            echo "started (PID $(cat "$PIDFILE"))"
        else
            rm -f "$PIDFILE"
            echo "failed to start — check $LOGFILE"
            exit 1
        fi
        ;;
    stop)
        if _is_running; then
            kill "$(cat "$PIDFILE")" 2>/dev/null
            rm -f "$PIDFILE"
            echo "stopped"
        else
            rm -f "$PIDFILE"
            echo "not running"
        fi
        ;;
    status)
        if _is_running; then
            echo "running (PID $(cat "$PIDFILE"))"
        else
            rm -f "$PIDFILE" 2>/dev/null
            echo "stopped"
        fi
        ;;
    *)
        echo "Usage: wacli-daemon {start|stop|status}"
        exit 1
        ;;
esac