Yimaru-Mobile/lib/ui/views/learn_course/learn_course_view.dart

import 'package:flutter/material.dart';
import 'package:stacked/stacked.dart';
import 'package:yimaru_app/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/finish_practice_sheet.dart';
import '../../widgets/learn_course_tile.dart';
import '../../widgets/small_app_bar.dart';
import 'learn_course_viewmodel.dart';

class LearnCourseView extends StackedView<LearnCourseViewModel> {
  final int id;

  const LearnCourseView({Key? key, required this.id}) : super(key: key);


  Future<void> _onPractice({required BuildContext context,
    required LearnCourse course,
    required LearnCourseViewModel viewModel}) async {
    if (course.access?.completedCount == course.access?.totalCount) {
      await viewModel.navigateToLearnPractice(
          id: course.id ?? 0,
          level: course.name ?? '');
    } else {
      await _showSheet(context: context, viewModel: viewModel);
    }
  }

  Future<void> _showSheet({required BuildContext context,
    required LearnCourseViewModel viewModel}) async =>
      await showModalBottomSheet(
        context: context,
        backgroundColor: kcTransparent,
        builder: (_) => _buildSheet(viewModel),
      );


  @override
  void onViewModelReady(LearnCourseViewModel viewModel) async {
    await viewModel.getLearnCourses(id);
    super.onViewModelReady(viewModel);
  }

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

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

  Widget _buildScaffoldWrapper({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      Scaffold(
        backgroundColor: kcBackgroundColor,
        body: _buildScaffoldContainer(context: context,viewModel: viewModel),
      );

  Widget _buildScaffoldContainer({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      Container(
        decoration: bgDecoration,
        child: _buildScaffold(context: context,viewModel: viewModel),
      );

  Widget _buildScaffold({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      SafeArea(child: _buildBody(context: context,viewModel: viewModel));

  Widget _buildBody({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      Padding(
        padding: const EdgeInsets.symmetric(horizontal: 15),
        child: _buildColumn(context: context,viewModel: viewModel),
      );

  Widget _buildColumn({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      Column(
        children: [
          verticalSpaceMedium,
          _buildAppBar(viewModel),
          verticalSpaceMedium,
          _buildCoursesColumnWrapper(context: context,viewModel: viewModel)
        ],
      );

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

  Widget _buildCoursesColumnWrapper({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      Expanded(child: _buildLevelsColumnScrollView(context: context,viewModel: viewModel));

  Widget _buildLevelsColumnScrollView({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      SingleChildScrollView(
        child: _buildListViewBuilder(context: context,viewModel: viewModel),
      );

  Widget _buildListViewBuilder({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      viewModel.busy(StateObjects.learnCourses)
          ? _buildProgressIndicator()
          : _buildListView(context: context,viewModel: viewModel);

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

  Widget _buildListView({required BuildContext context,
    required LearnCourseViewModel viewModel}) =>
      ListView.separated(
        shrinkWrap: true,
        itemCount: viewModel.courses.length,
        physics: const NeverScrollableScrollPhysics(),
        itemBuilder: (context, index) =>
            _buildTile(
              course: viewModel.courses[index],

              onPracticeTap: () async =>
              await _onPractice(
                  context: context,
                  viewModel: viewModel,
                  course: viewModel.courses[index]
              ),
              onViewTap: () async =>
              await viewModel.navigateToLearnModule(viewModel.courses[index]),
            ),
        separatorBuilder: (context, index) => verticalSpaceSmall,
      );

  Widget _buildTile({
    required LearnCourse course,
    required GestureTapCallback onViewTap,
    required GestureTapCallback onPracticeTap,
  }) =>
      LearnCourseTile(
        course: course,
        onViewTap: onViewTap,
        onPracticeTap: onPracticeTap,
      );


  Widget _buildSheet(LearnCourseViewModel viewModel) =>
      FinishPracticeSheet(onTap: viewModel.pop);
}