#!/usr/bin/env bash
# Local development server: start|stop|status|restart|logs|tunnel-check
#
#   ./scripts/dev-server.sh restart     # reads .env.dev if present, runs on DASH_PORT
#
# The server keeps running after this shell exits (nohup + pidfile) so you can browse it
# while an agent works. Logs: data/logs/dev.log
set -uo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$ROOT"
PIDFILE="$ROOT/data/dev-server.pid"
LOG="$ROOT/data/logs/dev.log"
mkdir -p "$ROOT/data/logs"

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

start() {
  if running; then
    echo "already running (pid $(cat "$PIDFILE")) — http://127.0.0.1:${DASH_PORT:-8090}"
    return 0
  fi
  if [ -f "$ROOT/.env.dev" ]; then
    set -a; . "$ROOT/.env.dev"; set +a
    echo "loaded .env.dev"
  fi
  PORT="${DASH_PORT:-8090}"
  nohup .venv/bin/dashboards >"$LOG" 2>&1 &
  echo $! >"$PIDFILE"
  sleep 3
  if running && curl -sf -o /dev/null "http://127.0.0.1:${PORT}/api/health"; then
    echo "started pid $(cat "$PIDFILE") — http://127.0.0.1:${PORT}"
  else
    echo "FAILED to start; last lines of $LOG:"
    tail -20 "$LOG"
    return 1
  fi
}

stop() {
  if running; then
    local pid
    pid="$(cat "$PIDFILE")"
    kill "$pid" 2>/dev/null
    # Wait for the process to actually go away before handing the pidfile back. A bare
    # `sleep 1` was not enough: uvicorn's graceful shutdown waits for in-flight requests,
    # so `restart` with a browser open started the new server while the old one still
    # held the SQLite file — the dying process then logged `database is locked` for a poll
    # it had already fetched, which the app correctly turned into a red store-error event.
    # Two servers on one DB is the one way this script can fabricate an incident, so the
    # wait is bounded rather than optimistic, and SIGKILL is the last resort.
    local i=0
    while kill -0 "$pid" 2>/dev/null; do
      i=$((i + 1))
      if [ "$i" -gt 60 ]; then
        echo "pid $pid ignored SIGTERM after 20s; sending SIGKILL"
        kill -9 "$pid" 2>/dev/null
        break
      fi
      sleep 0.25
    done
    echo "stopped"
  else
    echo "not running"
  fi
  rm -f "$PIDFILE"
}

case "${1:-start}" in
  start) start ;;
  stop) stop ;;
  restart) stop; start ;;
  status)
    if running; then
      echo "running pid $(cat "$PIDFILE")"
      curl -s "http://127.0.0.1:${DASH_PORT:-8090}/api/health" \
        | .venv/bin/python -c "import json,sys; d=json.load(sys.stdin); print('status:', d['status']); [print(' ', s['key'], 'ok' if s['ok'] else 'DOWN', (s['error'] or '')[:90]) for s in d['sources']]"
    else
      echo "not running"
    fi ;;
  logs) tail -n 40 "$LOG" ;;
  *) echo "usage: $0 start|stop|restart|status|logs"; exit 2 ;;
esac