import 'package:flutter/material.dart';
import 'package:novyronst/root/lib_export.dart';

class NyLoadingWidget extends StatefulWidget {
  final double size;

  const NyLoadingWidget({
    super.key,
    this.size = 10,
  });

  @override
  State<NyLoadingWidget> createState() => _ThreeDotLoadingState();
}

class _ThreeDotLoadingState extends State<NyLoadingWidget>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  int _currentIndex = 0;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 600),
    )..addListener(() {
      // 每完成一次动画循环，更新索引
      if (_controller.isCompleted) {
        _controller.reset();
        setState(() {
          _currentIndex = (_currentIndex + 1) % 3;
        });
        _controller.forward();
      }
    });
    _controller.forward();
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: AppScreen.screenWidth,
      child: Row(
        mainAxisSize: MainAxisSize.min,
        mainAxisAlignment: MainAxisAlignment.center,
        children: List.generate(3, (index) {
          final isDark = index == _currentIndex;
          return AnimatedContainer(
            duration: const Duration(milliseconds: 200),
            margin: const EdgeInsets.symmetric(horizontal: 6),
            width: widget.size,
            height: widget.size,
            decoration: BoxDecoration(
              shape: BoxShape.circle,
              color: isDark ? ConstColor.withValue('#89F011') : ConstColor.withValue('#E2FFC0'),
            ),
          );
        }),
      ),
    );
  }
}