import 'package:easy_localization/easy_localization.dart';
import 'package:flutter/material.dart';
import 'package:stacked/stacked.dart';
import 'package:yimaru_app/models/learn_module.dart';
import 'package:yimaru_app/ui/common/translations/locale_keys.g.dart';
import 'package:yimaru_app/ui/widgets/learn_module_tile.dart';
import 'package:yimaru_app/ui/widgets/overall_progress.dart';

import '../../../models/learn_course.dart';
import '../../common/app_colors.dart';
import '../../common/enmus.dart';
import '../../common/ui_helpers.dart';
import '../../widgets/custom_circular_progress_indicator.dart';
import '../../widgets/small_app_bar.dart';
import 'learn_module_viewmodel.dart';

class LearnModuleView extends StackedView<LearnModuleViewModel> {
  final LearnCourse course;

  const LearnModuleView({Key? key, required this.course}) : super(key: key);

  @override
  void onViewModelReady(LearnModuleViewModel viewModel) async {
    await viewModel.getLearnModules(course.id ?? 0);
    super.onViewModelReady(viewModel);
  }

  @override
  LearnModuleViewModel viewModelBuilder(BuildContext context) =>
      LearnModuleViewModel();

  @override
  Widget builder(
    BuildContext context,
    LearnModuleViewModel viewModel,
    Widget? child,
  ) =>
      _buildScaffoldWrapper(viewModel);

  Widget _buildScaffoldWrapper(LearnModuleViewModel viewModel) => Scaffold(
        backgroundColor: kcBackgroundColor,
        body: _buildScaffoldContainer(viewModel),
      );

  Widget _buildScaffoldContainer(LearnModuleViewModel viewModel) => Container(
        decoration: bgDecoration,
        child: _buildScaffold(viewModel),
      );

  Widget _buildScaffold(LearnModuleViewModel viewModel) =>
      SafeArea(child: _buildBody(viewModel));

  Widget _buildBody(LearnModuleViewModel viewModel) => Padding(
        padding: const EdgeInsets.symmetric(horizontal: 15),
        child: _buildColumn(viewModel),
      );

  Widget _buildColumn(LearnModuleViewModel viewModel) => Column(
        children: [
          verticalSpaceMedium,
          _buildAppBar(viewModel),
          verticalSpaceMedium,
          _buildModulesColumnWrapper(viewModel),
        ],
      );

  Widget _buildAppBar(LearnModuleViewModel viewModel) => SmallAppBar(
        onPop: viewModel.pop,
        showBackButton: true,
      );

  Widget _buildModulesColumnWrapper(LearnModuleViewModel viewModel) =>
      Expanded(child: _buildLevelsColumnScrollView(viewModel));

  Widget _buildLevelsColumnScrollView(LearnModuleViewModel viewModel) =>
      SingleChildScrollView(
        child: _buildLevelsColumn(viewModel),
      );

  Widget _buildLevelsColumn(LearnModuleViewModel viewModel) => Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: _buildLevelsColumnChildren(viewModel),
      );

  List<Widget> _buildLevelsColumnChildren(LearnModuleViewModel viewModel) => [
        verticalSpaceSmall,
        _buildTitle(),
        _buildSubtitle(),
        verticalSpaceMedium,
        _buildOverallProgress(),
        verticalSpaceMedium,
        _buildListViewBuilder(viewModel)
      ];

  Widget _buildTitle() => Text(
        course.name ?? '',
        style: style18P600,
      );

  Widget _buildSubtitle() => Text(
        LocaleKeys.your_current_level.tr(),
        style: style14P400,
      );

  Widget _buildOverallProgress() => OverallProgress(
        indicatorBackgroundColor: kcWhite,
        progress: course.access?.progressPercent ?? 0,
        backgroundColor: kcPrimaryColor.withOpacity(0.1),
      );

  Widget _buildListViewBuilder(LearnModuleViewModel viewModel) =>
      viewModel.busy(StateObjects.learnModules)
          ? _buildProgressIndicator()
          : _buildListView(viewModel);

  Widget _buildProgressIndicator() => const Center(
        child: CustomCircularProgressIndicator(color: kcPrimaryColor),
      );

  Widget _buildListView(LearnModuleViewModel viewModel) => ListView.builder(
        shrinkWrap: true,
        itemCount: viewModel.modules.length,
        physics: const NeverScrollableScrollPhysics(),
        itemBuilder: (context, index) => _buildTile(
          module: viewModel.modules[index],
          onPracticeTap: () async => await viewModel.navigateToLearnPractice(
              id: viewModel.modules[index].id ?? 0,
              module: viewModel.modules[index].name ?? ''),
          onModuleTap: () async =>
              await viewModel.navigateToLearnLesson(viewModel.modules[index]),
        ),
      );

  Widget _buildTile({
    required LearnModule module,
    required GestureTapCallback onModuleTap,
    required GestureTapCallback onPracticeTap,
  }) =>
      LearnModuleTile(
          module: module,
          onModuleTap: onModuleTap,
          onPracticeTap: onPracticeTap);
}