import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'dart:async';
import 'kr_simple_loading.dart';

/// 简单的Toast组件，替代flutter_easyloading
class KRToast {
  static OverlayEntry? _overlayEntry;
  static Timer? _timer;

  /// 显示Toast消息
  static void kr_showToast(
    String message, {
    Duration duration = const Duration(milliseconds: 1500),
    KRToastPosition position = KRToastPosition.center,
  }) {
    _hideToast(); // 隐藏之前的Toast

    _overlayEntry = OverlayEntry(
      builder: (context) => _ToastWidget(
        message: message,
        position: position,
      ),
    );

    Overlay.of(Get.overlayContext!).insert(_overlayEntry!);

    _timer = Timer(duration, () {
      _hideToast();
    });
  }

  /// 显示加载动画
  static void kr_showLoading({String? message}) {
    _hideToast(); // 隐藏之前的Toast

    _overlayEntry = OverlayEntry(
      builder: (context) => _LoadingWidget(
        message: message,
      ),
    );

    Overlay.of(Get.overlayContext!).insert(_overlayEntry!);
  }

  /// 隐藏Toast或Loading
  static void kr_hideLoading() {
    _hideToast();
  }

  /// 隐藏Toast
  static void _hideToast() {
    _timer?.cancel();
    _timer = null;
    _overlayEntry?.remove();
    _overlayEntry = null;
  }
}

/// Toast位置枚举
enum KRToastPosition {
  top,
  center,
  bottom,
}

/// Toast组件
class _ToastWidget extends StatelessWidget {
  final String message;
  final KRToastPosition position;

  const _ToastWidget({
    required this.message,
    required this.position,
  });

  @override
  Widget build(BuildContext context) {
    return Material(
      color: Colors.transparent,
      child: SafeArea(
        child: Align(
          alignment: _getAlignment(),
          child: Container(
            margin: const EdgeInsets.all(16.0),
            padding: const EdgeInsets.symmetric(horizontal: 20.0, vertical: 12.0),
            decoration: BoxDecoration(
              color: Colors.black.withOpacity(0.8),
              borderRadius: BorderRadius.circular(12.0),
              boxShadow: [
                BoxShadow(
                  color: Colors.black.withOpacity(0.1),
                  offset: const Offset(0, 2),
                  blurRadius: 8,
                  spreadRadius: 2,
                )
              ],
            ),
            child: Text(
              message,
              style: const TextStyle(
                fontSize: 15.0,
                color: Colors.white,
                fontWeight: FontWeight.w500,
                letterSpacing: 0.3,
              ),
            ),
          ),
        ),
      ),
    );
  }

  Alignment _getAlignment() {
    switch (position) {
      case KRToastPosition.top:
        return Alignment.topCenter;
      case KRToastPosition.center:
        return Alignment.center;
      case KRToastPosition.bottom:
        return Alignment.bottomCenter;
    }
  }
}

/// Loading组件
class _LoadingWidget extends StatelessWidget {
  final String? message;

  const _LoadingWidget({this.message});

  @override
  Widget build(BuildContext context) {
    return Material(
      color: Colors.black.withOpacity(0.2),
      child: SafeArea(
        child: Center(
          child: Container(
            padding: const EdgeInsets.symmetric(horizontal: 25.0, vertical: 15.0),
            decoration: BoxDecoration(
              color: Colors.black.withOpacity(0.8),
              borderRadius: BorderRadius.circular(15.0),
              boxShadow: [
                BoxShadow(
                  color: Colors.black.withOpacity(0.1),
                  offset: const Offset(0, 2),
                  blurRadius: 8,
                  spreadRadius: 2,
                )
              ],
            ),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                KRSimpleLoading(
                  color: Colors.white,
                  size: 35.0,
                ),
                if (message != null) ...[
                  const SizedBox(height: 12.0),
                  Text(
                    message!,
                    style: const TextStyle(
                      fontSize: 14.0,
                      color: Colors.white,
                    ),
                  ),
                ],
              ],
            ),
          ),
        ),
      ),
    );
  }
}