import 'dart:async';

import 'package:app/utils/time.dart';
import 'package:flutter/material.dart';

class WaitingStart extends StatefulWidget {
  const WaitingStart({super.key});

  @override
  State<WaitingStart> createState() => _WaitingStartState();
}

class _WaitingStartState extends State<WaitingStart> {
  ///剩余秒
  int _seconds = 0;
  Timer? _timer;

  @override
  void initState() {
    super.initState();
    startCountDown();
  }

  @override
  void dispose() {
    super.dispose();
    _timer?.cancel();
    _timer = null;
  }

  ///开始倒计时
  void startCountDown() {
    //当前时间
    DateTime now = DateTime.now();
    //远端时间
    DateTime remote = DateTime.parse("2025-11-19 17:10:00".replaceFirst(' ', 'T'));
    setState(() {
      _seconds = remote.difference(now).inSeconds;
    });
    _timer = Timer.periodic(Duration(seconds: 1), (timer) {
      setState(() {
        _seconds--;
      });
      if (_seconds <= 0) {
        _timer?.cancel();
        _timer = null;
        _start();
      }
    });
  }

  ///倒计时结束开始
  void _start() {}

  @override
  Widget build(BuildContext context) {
    return Align(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Text(
            "未到开播时间，到点后自动开播",
            style: TextStyle(color: Colors.white),
          ),
          Container(
            margin: EdgeInsets.symmetric(vertical: 10),
            child: Text(
              formatSeconds(_seconds),
              style: TextStyle(
                color: Colors.white,
                fontSize: 26,
                fontWeight: FontWeight.bold,
              ),
            ),
          ),
        ],
      ),
    );
  }
}