import 'package:cs_resources/generated/assets.dart';
import 'package:cs_resources/theme/app_colors_theme.dart';
import 'package:flutter/material.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:plugin_platform/engine/dialog/dialog_engine.dart';
import 'package:widgets/ext/ex_widget.dart';
import 'package:widgets/my_load_image.dart';
import 'package:widgets/my_text_view.dart';

/*
 * 国家选择控件，用于电话号码区号的选择
 */
class CountryCodeSelector extends StatefulWidget {
  String countryCode; //默认选中新加坡
  bool isEnable = true; //是否可用
  EdgeInsetsGeometry margin;
  void Function(String? countryCode) onChanged; //选中的回调

  CountryCodeSelector(
      {Key? key, this.countryCode = "+65", this.isEnable = true, this.margin = const EdgeInsets.only(left: 35, right: 35, top: 5), required this.onChanged})
      : super(key: key);

  @override
  State<CountryCodeSelector> createState() {
    return _CountryCodePickerSelector();
  }
}

class _CountryCodePickerSelector extends State<CountryCodeSelector> {
  String? selectedCountryCode;
  Map<String, String>? selectedCountryEntity;

  final List<Map<String, String>> countries = [
    {'code': '+1', 'icon': Assets.authMeiguo},
    {'code': '+44', 'icon': Assets.authYinguo},
    {'code': '+60', 'icon': Assets.authMalaixiya},
    {'code': '+61', 'icon': Assets.authAodaliya},
    {'code': '+62', 'icon': Assets.authYindunixiya},
    {'code': '+63', 'icon': Assets.authFeilvbing},
    {'code': '+65', 'icon': Assets.authXinjiapo},
    {'code': '+66', 'icon': Assets.authTaiguo},
    {'code': '+86', 'icon': Assets.authZhongguo},
    {'code': '+852', 'icon': Assets.authXianggang},
  ];

  @override
  void initState() {
    super.initState();
    selectedCountryCode = widget.countryCode.startsWith("+") ? widget.countryCode : "+${widget.countryCode}";
    selectedCountryEntity = countries.firstWhere((element) => element['code'] == selectedCountryCode);

    // 在布局完成之后调用回调
    WidgetsBinding.instance.addPostFrameCallback((_) {
      widget.onChanged.call(selectedCountryCode);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      crossAxisAlignment: CrossAxisAlignment.center,
      children: [
        MyAssetImage(selectedCountryEntity?['icon'] ?? Assets.authXinjiapo, width: 28, height: 20),
        MyTextView(
          selectedCountryEntity?['code'] ?? '+65',
          marginLeft: 8,
          marginRight: 10,
          textColor: context.appColors.authFiledHint,
          isFontMedium: true,
          fontSize: 16,
        ),
        Opacity(
          opacity: widget.isEnable ? 1.0 : 0.0,
          child: MyAssetImage(
            Assets.baseServiceTriangleDropDown,
            width: 7,
            height: 4,
            color: context.appColors.textBlack,
          ),
        ),
      ],
    ).onTap(() {
      if (widget.isEnable) {
        _showCountryPicker(context);
      }
    });
  }

  void _showCountryPicker(BuildContext targetContext) {
    DialogEngine.showAttach(
      tag: "CountryCode",
      targetContext: targetContext,
      position: DialogPosition.bottom,
      widget: _AttachCountryDialog(
        margin: widget.margin,
        list: countries,
        onSelected: (item) {
          setState(() {
            selectedCountryCode = item['code'];
            selectedCountryEntity = item;
            widget.onChanged.call(selectedCountryCode);
          });
        },
      ),
    );
  }
}

//下拉选的弹窗布局
class _AttachCountryDialog extends StatelessWidget {
  final Function(Map<String, String>) onSelected;
  final List<Map<String, String>> list;
  EdgeInsetsGeometry margin;

  // 创建一个构造函数接收 onSelected 回调
  _AttachCountryDialog({required this.onSelected, required this.list, required this.margin});

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: margin,
      decoration: BoxDecoration(
        color: context.appColors.whiteBG,
        borderRadius: BorderRadius.circular(5.0), // 5个圆角
        boxShadow: [
          BoxShadow(
            color: const Color(0xFF656565).withOpacity(0.1), // 阴影颜色，并且设置透明度
            offset: const Offset(0, 1.5), // 阴影的偏移量
            blurRadius: 2.5, // 模糊半径
            spreadRadius: 1.5, // 扩散半径
          ),
        ],
      ),
      constraints: const BoxConstraints(
        maxHeight: 250, // 设置最大高度
        maxWidth: 100,
      ),
      child: ListView.builder(
        padding: EdgeInsets.zero,
        itemCount: list.length,
        itemBuilder: (context, index) {
          final item = list[index];
          return GestureDetector(
            onTap: () {
              onSelected(item); // 点击后调用回调
              SmartDialog.dismiss(tag: 'CountryCode');
            },
            child: Row(
              mainAxisSize: MainAxisSize.max,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                const SizedBox(width: 15),
                MyAssetImage(item['icon']!, width: 28, height: 20),
                MyTextView(
                  item['code']!,
                  marginLeft: 8,
                  marginRight: 10,
                  textColor: context.appColors.textBlack,
                  isFontMedium: true,
                  fontSize: 16,
                ).expanded(),
              ],
            ).marginOnly(top: 7.5, bottom: 7.5),
          );
        },
      ),
    );
  }
}