import 'dart:async';

import 'package:flutter/material.dart';

class HelloSplashScreen extends StatefulWidget {
  const HelloSplashScreen({super.key, required this.onFinished, this.duration = const Duration(seconds: 5)});

  final Duration duration;
  final VoidCallback onFinished;

  @override
  State<HelloSplashScreen> createState() => _HelloSplashScreenState();
}

class _HelloSplashScreenState extends State<HelloSplashScreen> with SingleTickerProviderStateMixin {
  late final AnimationController _controller;
  late final Animation<double> _opacity;

  Timer? _fadeTimer;
  Timer? _doneTimer;

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

    _controller = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 500),
    );

    _opacity = CurvedAnimation(
      parent: _controller,
      curve: Curves.easeInOut,
    );

    _controller.value = 1.0;

    final int fadeMs = (widget.duration.inMilliseconds - 500).clamp(0, widget.duration.inMilliseconds);
    _fadeTimer = Timer(Duration(milliseconds: fadeMs), () {
      if (!mounted) return;
      _controller.reverse();
    });

    _doneTimer = Timer(widget.duration, () {
      if (!mounted) return;
      widget.onFinished();
    });
  }

  @override
  void dispose() {
    _fadeTimer?.cancel();
    _doneTimer?.cancel();
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final Size size = MediaQuery.sizeOf(context);

    return Scaffold(
      body: FadeTransition(
        opacity: _opacity,
        child: Container(
          width: size.width,
          height: size.height,
          color: const Color(0xFFFFC9DF),
          child: SafeArea(
            child: Center(
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: const [
                  Text(
                    'Olá',
                    textAlign: TextAlign.center,
                    style: TextStyle(
                      fontSize: 64,
                      fontWeight: FontWeight.w900,
                      color: Colors.white,
                      height: 1.0,
                    ),
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}