import 'dart:async';
import 'dart:io';

import 'package:mqtt_client/mqtt_client.dart';

import 'package:pj_supermarket_cloud/common/index.dart';

class SyncCheckTool {
  static const _tag = "自动检查任务";

  SyncCheckTool._privateConstructor();
  static final SyncCheckTool _instance = SyncCheckTool._privateConstructor();
  static SyncCheckTool get instance => _instance;

  bool _isRunning = false;

// **************************************************************************
// 定时器配置 start
// **************************************************************************

  Duration mqInterval = const Duration(seconds: 60);

  Duration printInterval = const Duration(seconds: 60 * 10);

  Duration broadcastInterval = const Duration(seconds: 60 * 2);

  Duration deviceStatusInterval = const Duration(seconds: 60);

  Timer? mqTimer;

  Timer? printTimer;

  Timer? broadcastTimer;

  Timer? deviceStatusTimer;

// **************************************************************************
// 定时器配置 end
// **************************************************************************

  void startAll() {
    if (_isRunning) return;
    _isRunning = true;
    checkMq();
    checkPrint();
    checkBroadcast();
    checkDeviceStatus();
    checkExpiredLog();
  }

  void dispose() {
    _isRunning = false;
    mqTimer?.cancel();
    mqTimer = null;
    printTimer?.cancel();
    printTimer = null;
    broadcastTimer?.cancel();
    broadcastTimer = null;
    deviceStatusTimer?.cancel();
    deviceStatusTimer = null;
  }

  // 检查mq是否可以连接,是否需要重新连接
  checkMq() {
    String logMsg = "检查mq是否可以连接,是否需要重新连接";
    final inSeconds = mqInterval.inSeconds;
    if (mqTimer != null && mqTimer!.isActive) {
      mqTimer?.cancel();
      mqTimer = null;
    }
    if (mqTimer != null) {
      mqTimer?.cancel();
      mqTimer = null;
    }
    mqTimer = Timer.periodic(mqInterval, (Timer timer) async {
      final isNetwork = AppNetworkTool.isAutoNetwork();
      if (!isNetwork) return;
      logger.i("|$_tag|$logMsg,$inSeconds秒一次,开始执行");
      if (MqManager.state == MqttConnectionState.connected) return;
      try {
        AppMqTool.mqRefresh();
      } catch (e) {
        logger.i("|$_tag|$logMsg,$inSeconds秒一次,执行失败,error:$e");
      } finally {
        logger.i("|$_tag|$logMsg,$inSeconds秒一次,执行完成");
      }
    });
  }

  // 定时检查需不要打印
  checkPrint() {
    String logMsg = "定时检查需不要打印";
    final inSeconds = printInterval.inSeconds;
    if (printTimer != null && printTimer!.isActive) {
      printTimer?.cancel();
      printTimer = null;
    }
    if (printTimer != null) {
      printTimer?.cancel();
      printTimer = null;
    }
    printTimer = Timer.periodic(printInterval, (Timer timer) async {
      final isNetwork = AppNetworkTool.isAutoNetwork();
      if (!isNetwork) return;
      logger.i("|$_tag|$logMsg,$inSeconds秒一次,开始执行");
      try {
        await SyncPrintTool.doCheckPrint();
        await SyncPrintTool.doCheckSync();
      } catch (e) {
        logger.i("|$_tag|$logMsg,$inSeconds秒一次,执行失败,error:$e");
      } finally {
        logger.i("|$_tag|$logMsg,$inSeconds秒一次,执行完成");
      }
    });
  }

  // 定时检查需不要广播
  checkBroadcast() {
    String logMsg = "定时检查需不要广播";
    final inSeconds = broadcastInterval.inSeconds;
    if (broadcastTimer != null && broadcastTimer!.isActive) {
      broadcastTimer?.cancel();
      broadcastTimer = null;
    }
    if (broadcastTimer != null) {
      broadcastTimer?.cancel();
      broadcastTimer = null;
    }
    broadcastTimer = Timer.periodic(broadcastInterval, (Timer timer) async {
      final isNetwork = AppNetworkTool.isAutoNetwork();
      if (!isNetwork) return;
      logger.i("|$_tag|$logMsg,$inSeconds秒一次,开始执行");
      try {
        final setting = await AppSettingTool.getSysSetting();
        await SyncTakeFoodBroadcastTool.doCheckBroadcast(
          setting.hourType ?? ProductHourType.TOTAL,
        );
      } catch (e) {
        logger.i("|$_tag|$logMsg,$inSeconds秒一次,执行失败,error:$e");
      } finally {
        logger.i("|$_tag|$logMsg,$inSeconds秒一次,执行完成");
      }
    });
  }

  /// 设备状态检查不依赖网络，也不会主动开关串口或连接打印机。
  void checkDeviceStatus() {
    final inSeconds = deviceStatusInterval.inSeconds;
    deviceStatusTimer?.cancel();
    deviceStatusTimer = Timer.periodic(deviceStatusInterval, (timer) async {
      logger.i("|$_tag|检查终端设备状态,$inSeconds秒一次,开始执行");
      try {
        await AppDeviceStatusTool.refreshAll();
      } catch (e) {
        logger.i("|$_tag|检查终端设备状态执行失败,error:$e");
      } finally {
        logger.i("|$_tag|检查终端设备状态执行完成");
      }
    });
  }

  // 检查过期日志(超过3个月的日志文件都要删除)
  checkExpiredLog() async {
    const logMsg = "检查过期日志";
    try {
      final backupPath = await AppFileTool.getLoggerBackupPath();
      if (backupPath == null || backupPath.isEmpty) {
        logger.w("|$_tag|$logMsg,日志备份路径为空");
        return;
      }
      final loggerBackupDir = Directory(backupPath).parent.parent;
      if (!await loggerBackupDir.exists()) {
        logger.i("|$_tag|$logMsg,日志目录不存在 path:${loggerBackupDir.path}");
        return;
      }
      final expireBefore = DateTime(
        DateTime.now().year,
        DateTime.now().month - 3,
        DateTime.now().day,
      );
      final entities = loggerBackupDir.listSync(recursive: true);
      int deleteCount = 0;
      for (final entity in entities) {
        if (entity is! File) continue;
        if (!entity.path.endsWith(".log")) continue;
        final stat = await entity.stat();
        if (stat.modified.isBefore(expireBefore)) {
          await entity.delete();
          deleteCount++;
          logger.i("|$_tag|$logMsg,删除过期日志 path:${entity.path}");
        }
      }
      final monthDirs = loggerBackupDir
          .listSync()
          .whereType<Directory>()
          .toList()
        ..sort((a, b) => b.path.compareTo(a.path));
      for (final dir in monthDirs) {
        if (!await dir.exists()) continue;
        final isEmpty = dir.listSync().isEmpty;
        if (isEmpty) {
          await dir.delete();
          logger.i("|$_tag|$logMsg,删除空目录 path:${dir.path}");
        }
      }
      logger.i("|$_tag|$logMsg,执行完成,删除日志数量:$deleteCount");
    } catch (e, stack) {
      logger.e("|$_tag|$logMsg,执行失败,error:$e,stack:$stack");
    }
  }
}