import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:food_health/api/dto/profile_options_dto.dart';
import 'package:food_health/api/dto/user_profile_dto.dart';
import 'package:food_health/api/endpoints/profile_api.dart';
import 'package:food_health/config/theme/custom_colors.dart';
import 'package:food_health/page/profile/edit/widget/food_allergies.dart';
import 'package:food_health/widgets/common/app_backend.dart';
import 'package:go_router/go_router.dart';
import 'package:remixicon/remixicon.dart';

import 'data/state.dart';
import 'widget/dietary_preferences.dart';
import 'widget/health_profile.dart';

class MyEditPage extends StatefulWidget {
  final UserProfileDto userProfile;

  const MyEditPage({super.key, required this.userProfile});

  @override
  State<MyEditPage> createState() => _MyEditPageState();
}

class _MyEditPageState extends State<MyEditPage> {
  late SelectionState selectionState;

  List<ProfileOptionDto> _options = [];

  var _loading = true;

  ///步骤
  var _step = 0;

  var stepList = [
    StepItem(
      title: "Food Allergies",
      icon: RemixIcons.shield_line,
      subTitle: "Help us keep you safe by telling us about your allergies",
    ),
    StepItem(
      title: "Dietary Preferences",
      icon: RemixIcons.heart_line,
      subTitle: "What dietary restrictions or preferences do you follow?",
    ),
    StepItem(
      title: "Health Profile",
      icon: RemixIcons.user_line,
      subTitle: "Share relevant health information for personalized recommendations",
    ),
  ];

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

  void _init() async {
    selectionState = SelectionState(widget.userProfile);
    var res = await getProfileOptionsApi();
    setState(() {
      _options = res;
      _loading = false;
    });
  }

  ///设置步骤
  void _handStep(bool isNext) {
    if (_step == 2 && isNext) {
      _submit();
      return;
    }
    setState(() {
      _step = (_step + (isNext ? 1 : -1)).clamp(0, 2);
    });
  }

  void _submit() async {
    EasyLoading.show(
      status: 'Saving…',
      maskType: EasyLoadingMaskType.clear,
    );
    await updateProfileApi(selectionState.userProfile);
    EasyLoading.dismiss();
    context.pop(true);
  }

  @override
  Widget build(BuildContext context) {
    if (_loading) {
      return Center(child: CircularProgressIndicator());
    }
    return Scaffold(
      body: AppBackend(
        child: ListView(
          padding: EdgeInsets.only(top: 30),
          children: [
            buildHeader(),
            buildStep(),
            buildStepInfo(),
            SelectionProvider(
              notifier: selectionState,
              child: Builder(
                builder: (context) {
                  if (_step == 0) {
                    return FoodAllergies(
                      options: _options,
                    );
                  } else if (_step == 1) {
                    return DietaryPreferences(
                      options: _options,
                    );
                  } else if (_step == 2) {
                    return HealthProfile(
                      options: _options,
                    );
                  }
                  return SizedBox();
                },
              ),
            ),
            Container(
              margin: EdgeInsets.only(top: 30),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Opacity(
                    opacity: _step == 0 ? 0.4 : 1,
                    child: buildItemButton(
                      title: "Previous",
                      color: Colors.black,
                      decoration: BoxDecoration(
                        color: Theme.of(context).colorScheme.surfaceContainer,
                      ),
                      onTap: () {
                        _handStep(false);
                      },
                    ),
                  ),
                  buildItemButton(
                    title: _step == 2 ? "Complete Setup" : "Continue",
                    decoration: BoxDecoration(
                      color: _step == 2 ? Theme.of(context).colorScheme.success : null,
                      gradient: _step == 2
                          ? null
                          : LinearGradient(
                              colors: [
                                Theme.of(context).colorScheme.primary,
                                Theme.of(context).colorScheme.primaryEnd,
                              ],
                            ),
                    ),
                    onTap: () {
                      _handStep(true);
                    },
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  ///构建顶部
  Widget buildHeader() {
    return Column(
      children: [
        Text(
          "Welcome to FoodSafe",
          style: Theme.of(context).textTheme.titleLarge,
        ),
        Container(
          margin: EdgeInsets.only(top: 5),
          child: Text(
            "Let's personalize your food safety experience",
            style: Theme.of(context).textTheme.labelMedium,
          ),
        ),
      ],
    );
  }

  ///步骤条
  Widget buildStep() {
    return Container(
      margin: EdgeInsets.only(top: 20),
      child: Row(
        spacing: 10,
        children: stepList.asMap().entries.map((entre) {
          //数据
          var item = entre.value;
          var index = entre.key;
          var isLast = index == stepList.length - 1;
          //颜色
          var selectColor = Theme.of(context).colorScheme.primary;
          var unselectedColor = Theme.of(context).colorScheme.surfaceContainerHigh;
          return Expanded(
            flex: isLast ? 0 : 1,
            child: Row(
              spacing: 10,
              children: [
                Container(
                  width: 50,
                  height: 50,
                  decoration: BoxDecoration(
                    color: _step >= index ? selectColor : unselectedColor,
                    shape: BoxShape.circle,
                  ),
                  child: Icon(
                    item.icon,
                    color: _step >= index ? Colors.white : Color(0xff9ca3af),
                  ),
                ),

                Visibility(
                  visible: !isLast,
                  child: Expanded(
                    child: Container(
                      height: 3,
                      color: _step > index ? selectColor : unselectedColor,
                    ),
                  ),
                ),
              ],
            ),
          );
        }).toList(),
      ),
    );
  }

  ///步骤条信息
  Widget buildStepInfo() {
    var stepInfo = stepList[_step];
    return Container(
      margin: EdgeInsets.only(top: 20, bottom: 30),
      child: Column(
        children: [
          Text(
            stepInfo.title,
            style: Theme.of(context).textTheme.titleMedium,
          ),
          Container(
            margin: EdgeInsets.only(top: 5),
            child: Text(
              stepInfo.subTitle,
              style: Theme.of(context).textTheme.labelMedium,
              textAlign: TextAlign.center,
            ),
          ),
        ],
      ),
    );
  }

  ///item按钮
  Widget buildItemButton({
    required String title,
    Color color = Colors.white,
    required BoxDecoration decoration,
    required Function() onTap,
  }) {
    return InkWell(
      onTap: onTap,
      child: Container(
        padding: EdgeInsets.symmetric(vertical: 10, horizontal: 20),
        decoration: decoration.copyWith(
          borderRadius: BorderRadius.circular(8),
        ),
        child: Text(
          title,
          style: TextStyle(color: color),
        ),
      ),
    );
  }
}

class StepItem {
  final IconData icon;
  final String title;
  final String subTitle;

  StepItem({
    required this.icon,
    required this.title,
    required this.subTitle,
  });
}