import 'package:eatvio_app/core/data/selectionPopupModel/selection_popup_model.dart';
import 'package:eatvio_app/core/utils/date_time_utils.dart';
import 'package:eatvio_app/core/widgets/custom_drop_down.dart';
import 'package:eatvio_app/core/widgets/loader.dart';
import 'package:eatvio_app/features/create_diet/presentation/widgets/error_widget.dart';
import 'package:eatvio_app/features/settings/entities/settings_entity.dart';
import 'package:eatvio_app/features/settings/presentation/bloc/settings_cubit/settings_state.dart';
import 'package:eatvio_app/generated/l10n.dart';
import 'package:eatvio_app/core/theme/theme_helper.dart';
import 'package:eatvio_app/core/widgets/custom_text_form_field.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class GeneralInfoScreen extends StatefulWidget {
  final SettingsEntity settingsEntity;

  const GeneralInfoScreen({super.key, required this.settingsEntity});

  @override
  State<GeneralInfoScreen> createState() => _GeneralInfoScreenState();
}

class _GeneralInfoScreenState extends State<GeneralInfoScreen> {
  final firstNameController = TextEditingController();
  final lastNameController = TextEditingController();
  late DateTime selectedDate;
  late SelectionPopupModel gender;
  final countryController = TextEditingController();
  final cityController = TextEditingController();
  final languageController = TextEditingController();
  late SelectionPopupModel isPublicProfile;
  bool isLoading = false;
  bool isNameMissing = false;
  bool isLastNameMissing = false;
  bool isLanguageMissing = false;

  final List<SelectionPopupModel> genderSelectionPopupList = [
    const SelectionPopupModel(id: 0, title: 'Женский', value: 'female'),
    const SelectionPopupModel(id: 1, title: 'Мужской', value: 'male'),
  ];

  final List<SelectionPopupModel> isPublicProfileSelectionPopupList = [
    const SelectionPopupModel(id: 0, title: 'Только зарегистрированным', value: false),
    const SelectionPopupModel(id: 1, title: 'Всем', value: true),
  ];

  @override
  void initState() {
    super.initState();
    selectedDate = DateTime.now();
    firstNameController.text = widget.settingsEntity.profileDetailsModel.firstName;
    lastNameController.text = widget.settingsEntity.profileDetailsModel.lastName;
    selectedDate = DateTime.parse(widget.settingsEntity.profileDetailsModel.birthdate);
    gender = widget.settingsEntity.profileDetailsModel.gender == 'male' ? genderSelectionPopupList[1] : genderSelectionPopupList[0];
    countryController.text = widget.settingsEntity.profileDetailsModel.country;
    cityController.text = widget.settingsEntity.profileDetailsModel.city;
    languageController.text = widget.settingsEntity.profileDetailsModel.lang;
    isPublicProfile = widget.settingsEntity.profileSettingsModel.isPublicProfile == true
        ? isPublicProfileSelectionPopupList[1]
        : isPublicProfileSelectionPopupList[0];
  }

  @override
  Widget build(BuildContext context) {
    final s = S.of(context);

    return Scaffold(
      appBar: AppBar(title: const Text('Общая информация')),
      bottomSheet: SafeArea(
        top: false,
        child: Padding(
          padding: const EdgeInsets.only(bottom: 56), // высота bottomNavigationBar
          child: _saveButton(),
        ),
      ),
      body: SingleChildScrollView(
        physics: const BouncingScrollPhysics(),
        padding: const EdgeInsets.all(16) + const EdgeInsets.only(bottom: 120), // 52 (кнопка) + 56 (навигация) + 12 (отступ)
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(s.first_name),
            const SizedBox(height: 4),
            Column(
              children: [
                CustomTextFormField(hasError: isNameMissing, controller: firstNameController, hintText: 'Введите имя', onChanged: (newValue) {}),
                if (isNameMissing) ...[const SizedBox(height: 4), const ValidationErrorWidget(error: 'Имя не может быть пустым')],
              ],
            ),
            const SizedBox(height: 16),
            Text(s.last_name),
            const SizedBox(height: 4),
            Column(
              children: [
                CustomTextFormField(hasError: isLastNameMissing, controller: lastNameController, hintText: 'Введите фамилию', onChanged: (newValue) {}),
                if (isLastNameMissing) ...[const SizedBox(height: 4), const ValidationErrorWidget(error: 'Фамилия не может быть пустой')],
              ],
            ),
            const SizedBox(height: 16),
            Text(s.date_of_birth),
            const SizedBox(height: 4),
            ListTile(
              onTap: onTapCalendar(context),
              trailing: Icon(Icons.keyboard_arrow_down_rounded, color: Colors.grey.shade700),
              contentPadding: const EdgeInsets.symmetric(horizontal: 12),
              title: Text(selectedDate.format('dd MMMM yyyy', 'ru')),
              tileColor: const Color(0xFFF6F6F6),
              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
            ),
            const SizedBox(height: 16),
            const Text('Пол'),
            const SizedBox(height: 4),
            CustomDropDown(
              items: genderSelectionPopupList,
              value: gender,
              onChanged: (newValue) {
                setState(() {
                  gender = newValue;
                });
              },
            ),
            const SizedBox(height: 16),
            const Text('Страна'),
            const SizedBox(height: 4),
            CustomTextFormField(controller: countryController),
            const SizedBox(height: 16),
            const Text('Город'),
            const SizedBox(height: 4),
            CustomTextFormField(controller: cityController),
            const SizedBox(height: 16),
            const Text('Предпочтительный язык общения'),
            const SizedBox(height: 4),
            Column(
              children: [
                CustomTextFormField(hasError: isLanguageMissing, controller: languageController),
                if (isLanguageMissing) ...[const SizedBox(height: 4), const ValidationErrorWidget(error: 'Язык не может быть пустым')],
              ],
            ),
            const SizedBox(height: 16),
            const Text('Показывать анкету'),
            const SizedBox(height: 4),
            CustomDropDown(
              items: isPublicProfileSelectionPopupList,
              value: isPublicProfile,
              onChanged: (newValue) {
                setState(() {
                  isPublicProfile = newValue;
                });
              },
            ),
          ],
        ),
      ),
    );
  }

  Null Function() onTapCalendar(BuildContext context) {
    return () {
      _showDialog(
        CupertinoDatePicker(
          initialDateTime: selectedDate,
          maximumDate: DateTime.now(),
          minimumDate: DateTime(1900),
          mode: CupertinoDatePickerMode.date,
          onDateTimeChanged: (DateTime newDateTime) {
            setState(() {
              selectedDate = newDateTime;
            });
          },
        ),
      );
    };
  }

  void _showDialog(Widget child) {
    showCupertinoModalPopup<void>(
      context: context,
      builder: (BuildContext context) => Container(
        height: 216,
        padding: const EdgeInsets.only(top: 6),
        margin: EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
        color: CupertinoColors.systemBackground.resolveFrom(context),
        child: SafeArea(top: false, child: child),
      ),
    );
  }

  bool _checkFields() {
    bool hasError = false;
    if (firstNameController.text.isEmpty) {
      setState(() {
        isNameMissing = true;
      });
      hasError = true;
    } else {
      setState(() {
        isNameMissing = false;
      });
    }
    if (lastNameController.text.isEmpty) {
      setState(() {
        isLastNameMissing = true;
      });
      hasError = true;
    } else {
      setState(() {
        isLastNameMissing = false;
      });
    }
    if (languageController.text.isEmpty) {
      setState(() {
        isLanguageMissing = true;
      });
      hasError = true;
    } else {
      setState(() {
        isLanguageMissing = false;
      });
    }
    return hasError;
  }

  Widget _saveButton() {
    return isLoading
        ? const Center(child: Loader())
        : InkWell(
            onTap: () async {
              final hasError = _checkFields();
              if (hasError) {
                return;
              }
              setState(() {
                isLoading = true;
              });
              await widget.settingsEntity.settingsCubit.updateProfileDetails(
                profileDetailsModel: (widget.settingsEntity.settingsCubit.state as SettingsStateLoaded).profileDetails.copyWith(
                  firstName: firstNameController.text,
                  lastName: lastNameController.text,
                  birthdate: selectedDate.toString(),
                  gender: gender.value,
                  country: countryController.text,
                  city: cityController.text,
                  lang: languageController.text,
                ),
              );
              await widget.settingsEntity.settingsCubit.updateProfileSettings(
                profileSettingsModel: (widget.settingsEntity.settingsCubit.state as SettingsStateLoaded).profileSettings.copyWith(
                  isPublicProfile: isPublicProfile.value,
                ),
              );
              setState(() {
                isLoading = false;
              });
            },
            borderRadius: BorderRadius.circular(20),
            child: Ink(
              height: 52,
              width: MediaQuery.of(context).size.width - 32,
              decoration: BoxDecoration(borderRadius: BorderRadius.circular(20), color: appTheme.blueA400),
              child: const Center(
                child: Text(
                  'Сохранить',
                  style: TextStyle(color: Colors.white, height: 1, fontWeight: FontWeight.w600, fontSize: 18),
                ),
              ),
            ),
          );
  }
}