lib/pages/section/section_page.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:nested_scroll_views/material.dart';
import 'package:wow_english/common/core/user_util.dart';
import 'package:wow_english/common/extension/string_extension.dart';
import 'package:wow_english/models/course_unit_entity.dart';
import 'package:wow_english/pages/section/section_type.dart';
import 'package:wow_english/pages/section/widgets/home_video_item.dart';
import 'package:wow_english/pages/section/widgets/section_bouns_item.dart';
import 'package:wow_english/pages/section/widgets/section_header_widget.dart';
import 'package:wow_english/route/route.dart';
import 'package:wow_english/utils/toast_util.dart';
import '../../models/course_section_entity.dart';
import 'bloc/section_bloc.dart';
import 'courese_module_model.dart';
/// 环节列表页
class SectionPage extends StatelessWidget {
  const SectionPage(
      {super.key,
      required this.courseUnitEntity,
      required this.courseUnitDetail});
  final CourseUnitEntity courseUnitEntity;
  /// unitId
  final CourseUnitDetail courseUnitDetail;
  @override
  Widget build(BuildContext context) {
    return BlocProvider(
      create: (context) => SectionBloc(courseUnitEntity, courseUnitDetail,
          PageController(), ScrollController())
        ..add(RequestDataEvent()),
      child: _SectionPageView(context),
    );
  }
}
class _SectionPageView extends StatelessWidget {
  const _SectionPageView(this.context);
  final BuildContext context;
  @override
  Widget build(BuildContext context) {
    final bloc = BlocProvider.of<SectionBloc>(context);
    return BlocListener<SectionBloc, SectionState>(
      listener: (context, state) {
        if (state is RequestVideoLessonState) {
          final videoUrl = bloc.processEntity?.videos?.videoUrl ?? '';
          var title = '';
          if (state.type == SectionType.song.value) {
            title = 'song';
          }
          if (state.type == SectionType.video.value) {
            title = 'video';
          }
          if (state.type == SectionType.bouns.value) {
            title = 'bonus';
          }
          if (videoUrl.isEmpty || !videoUrl.contains('http')) {
            return;
          }
          pushNamed(AppRouteName.lookVideo, arguments: {
            'videoUrl': videoUrl,
            'title': title,
            'courseLessonId': state.courseLessonId,
            'isTopic': true
          }).then((value) {
            if (value != null) {
              Map<String, dynamic> dataMap = value as Map<String, dynamic>;
              bloc.add(RequestEndClassEvent(dataMap['courseLessonId']!,
                  dataMap['currentTime']!, true, autoNextSection: dataMap['nextSection'] as bool));
            }
          });
          return;
        }
        if (state is RequestEnterClassState) {
          if (state.courseType != SectionType.practice.value
              && state.courseType != SectionType.pictureBook.value) {
            ///视频类型
            ///获取视频课程内容
            bloc.add(RequestVideoLessonEvent(
                state.courseLessonId, state.courseType));
            return;
          }
          if (state.courseType == SectionType.pictureBook.value) {
            //绘本
            pushNamed(AppRouteName.reading,
                    arguments: {'courseLessonId': state.courseLessonId})
                .then((value) {
              if (value != null) {
                Map<String, dynamic> dataMap = value as Map<String, dynamic>;
                bloc.add(RequestEndClassEvent(
                    dataMap['courseLessonId']!, dataMap['currentStep']!,
                    dataMap['isLastPage']! as bool, autoNextSection: dataMap['nextSection'] as bool));
              }
            });
            return;
          }
          if (state.courseType == SectionType.practice.value) {
            //练习
            pushNamed(AppRouteName.topicPic,
                    arguments: {'courseLessonId': state.courseLessonId})
                .then((value) {
              if (value != null) {
                Map<String, dynamic> dataMap = value as Map<String, dynamic>;
                bloc.add(RequestEndClassEvent(
                    dataMap['courseLessonId']!, dataMap['currentStep']!,
                    dataMap['isLastPage']! as bool, autoNextSection: dataMap['nextSection'] as bool));
              }
            });
            return;
          }
        }
      },
      child: _sectionView(),
    );
  }
  Widget _sectionView() =>
      BlocBuilder<SectionBloc, SectionState>(builder: (context, state) {
        final bloc = BlocProvider.of<SectionBloc>(context);
        return Scaffold(
          body: Container(
            color: Colors.white,
            child: Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  SectionHeaderWidget(
                      title: bloc.courseUnitDetail.name,
                      courseModuleCode: bloc.courseUnitEntity.courseModuleCode),
                  Expanded(
                      child: Padding(
                    padding: EdgeInsets.symmetric(horizontal: 10.w),
                    child: OverflowBox(
                      child: NestedPageView.builder(
                          itemCount: bloc.unlockPageCount(),
                          controller: bloc.pageController,
                          onPageChanged: (int index) {
                            bloc.add(CurrentUnitIndexChangeEvent(index));
                          },
                          itemBuilder: (context, index) {
                            return ScrollConfiguration(
                              ///去掉 Android 上默认的边缘拖拽效果
                              behavior: ScrollConfiguration.of(context)
                                  .copyWith(overscroll: false),
                              child: _itemTransCard(index, context),
                            );
                          }),
                    ), // 设置外部padding,
                  )),
                  SafeArea(
                    child: Padding(
                      padding: EdgeInsets.symmetric(horizontal: 13.w),
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          SizedBox(
                            height: 47.h,
                            width: 80.w,
                          ),
                          Container(
                            decoration: BoxDecoration(
                              color: CourseModuleModel(
                                      bloc.courseUnitEntity.courseModuleCode ??
                                          'Phase-1')
                                  .color,
                              borderRadius: BorderRadius.circular(14.5.r),
                            ),
                            padding: EdgeInsets.symmetric(
                                vertical: 8.h, horizontal: 24.w),
                            child: Text(
                              '${bloc.currentPage + 1}/${bloc.unlockPageCount()}',
                              style: TextStyle(
                                  color: Colors.white, fontSize: 12.sp),
                            ),
                          ),
                          Image.asset(
                            CourseModuleModel(
                                    bloc.courseUnitEntity.courseModuleCode ??
                                        'Phase-1')
                                .courseModuleLogo
                                .assetPng,
                            height: 47.h,
                            width: 80.w,
                            // color: Colors.red,
                          ),
                        ],
                      ),
                    ),
                  )
                ],
              ),
            ),
          ),
        );
      });
}
Widget _itemTransCard(int index, BuildContext context) {
  final bloc = BlocProvider.of<SectionBloc>(context);
  return NestedListView.builder(
      itemCount: bloc.courseSectionDatas?.length ?? 0,
      scrollDirection: Axis.horizontal,
      itemBuilder: (BuildContext context, int index) {
        CourseSectionEntity sectionData = bloc.courseSectionDatas![index];
        if (sectionData.courseType == SectionType.bouns.value) {
          //彩蛋
          return GestureDetector(
            onTap: () {
              if (!UserUtil.isLogined()) {
                pushNamed(AppRouteName.login);
                return;
              }
              if (sectionData.lock == true) {
                showToast('当前课程暂未解锁');
                return;
              }
              ///进入课堂
              bloc.add(RequestEnterClassEvent(
                  sectionData.id.toString(), sectionData.courseType));
            },
            child: SectionBoundsItem(
              imageUrl: sectionData.coverUrl,
            ),
          );
        } else {
          return GestureDetector(
            onTap: () {
              if (!UserUtil.isLogined()) {
                pushNamed(AppRouteName.login);
                return;
              }
              if (sectionData.lock == true) {
                showToast('当前课程暂未解锁');
                return;
              }
              ///进入课堂
              bloc.add(RequestEnterClassEvent(
                  sectionData.id.toString(), sectionData.courseType));
            },
            child: SectionVideoItem(
              unitEntity: bloc.courseUnitEntity,
              lessons: sectionData,
            ),
          );
        }
      });
}