#!/usr/bin/env bash
# watchdog.sh — 远程记忆服务器健康监控
#
# 每2小时执行一次（由 cron 调用）
# 连续 3 次失败 → 告警
#
# 用法:
#   bash scripts/watchdog.sh        # 单次检查
#   bash scripts/watchdog.sh status # 查看历史

set -euo pipefail

MEMORY_SERVER="http://111.229.145.18"
HISTORY_FILE="$HOME/.openclaw/memory/watchdog-history.log"
ALERT_FILE="$HOME/.openclaw/memory/watchdog-alert.log"
FAIL_COUNT_FILE="$HOME/.openclaw/memory/watchdog-failures"
THRESHOLD=3

mkdir -p "$(dirname "$HISTORY_FILE")"

check() {
  local ts=$(date '+%Y-%m-%d %H:%M:%S')
  local result=""
  local stats=""
  local search_test=""

  # 1. 健康检查
  stats=$(curl -s --max-time 5 "$MEMORY_SERVER/api/v2/stats" 2>/dev/null) || true
  if [ -z "$stats" ]; then
    result="DOWN (stats unreachable)"
  else
    # 2. 搜索功能检查
    search_test=$(curl -s --max-time 5 -X POST "$MEMORY_SERVER/api/v2/search" \
      -H "Content-Type: application/json" \
      -d '{"query":"健康检查","project":"xiaolong","limit":1}' 2>/dev/null) || true
    if echo "$search_test" | grep -q 'results'; then
      result="OK"
      # 提取记忆数
      local mem_count=$(echo "$stats" | node -e "const d=JSON.parse(require('fs').readFileSync('/dev/stdin','utf8'));console.log((d.projects.find(p=>p.project.includes('xiaolong'))||{}).memories||0)" 2>/dev/null || echo 0)
      result="OK ($mem_count memories)"
    else
      result="DEGRADED (search failed)"
    fi
  fi

  echo "$ts | $result" >> "$HISTORY_FILE"

  # 3. 失败计数
  if echo "$result" | grep -qE 'DOWN|DEGRADED'; then
    local failures=0
    [ -f "$FAIL_COUNT_FILE" ] && failures=$(cat "$FAIL_COUNT_FILE")
    failures=$((failures + 1))
    echo "$failures" > "$FAIL_COUNT_FILE"

    if [ "$failures" -ge "$THRESHOLD" ]; then
      echo "$ts | ALERT: $result (连续失败 $failures 次)" >> "$ALERT_FILE"
      echo "🚨 警告: 远程记忆服务器 $result (连续 $failures 次)"
      # 可以在这里加 webhook 通知
    fi
    echo "⚠️  $result"
  else
    echo "0" > "$FAIL_COUNT_FILE"
    echo "✅ $result"
  fi

  echo "$ts | watchdog: $result"
}

status() {
  echo "📊 远程服务器监控历史"
  echo ""
  echo "最近 10 次检查:"
  [ -f "$HISTORY_FILE" ] && tail -10 "$HISTORY_FILE" | sed 's/^/  /' || echo "  (无记录)"
  echo ""
  echo "失败计数:"
  [ -f "$FAIL_COUNT_FILE" ] && echo "  连续失败: $(cat "$FAIL_COUNT_FILE") 次" || echo "  0 次"
  echo ""
  echo "告警历史:"
  [ -f "$ALERT_FILE" ] && tail -5 "$ALERT_FILE" | sed 's/^/  /' || echo "  (无)"
}

case "${1:-check}" in
  check)  check ;;
  status) status ;;
esac