import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:wow_english/common/request/dao/lesson_dao.dart';
import 'package:wow_english/common/request/exception.dart';
import 'package:wow_english/common/request/dao/listen_dao.dart';
import 'package:wow_english/models/course_process_entity.dart';
import 'package:wow_english/utils/loading.dart';
import 'package:wow_english/utils/toast_util.dart';

import '../../../models/course_section_entity.dart';
import '../../../models/course_unit_entity.dart';

part 'section_event.dart';
part 'section_state.dart';

class SectionBloc extends Bloc<SectionEvent, SectionState> {

  CourseUnitEntity _courseUnitEntity;

  CourseUnitEntity get courseUnitEntity => _courseUnitEntity;

  CourseUnitDetail _courseUnitDetail;

  CourseUnitDetail get courseUnitDetail => _courseUnitDetail;

  List<CourseSectionEntity>? _courseSectionDatas;

  List<CourseSectionEntity>? get courseSectionDatas => _courseSectionDatas;

  CourseProcessEntity? _processEntity;

  CourseProcessEntity? get processEntity => _processEntity;

  SectionBloc(this._courseUnitEntity, this._courseUnitDetail) : super(LessonInitial()) {
    on<RequestDataEvent>(_requestData);
    on<RequestExitClassEvent>(_requestExitClass);
    on<RequestEnterClassEvent>(_requestEnterClass);
    on<RequestVideoLessonEvent>(_requestVideoLesson);
  }

  void _requestData(RequestDataEvent event, Emitter<SectionState> emitter) async {
    try {
      await loading(() async {
        _courseSectionDatas = await LessonDao.courseSection(courseUnitId: _courseUnitDetail.id!);
        emitter(LessonDataLoadState());
      });
    } catch (e) {
      if (e is ApiException) {
        showToast(e.message.toString());
      }
    }
  }

  void _requestVideoLesson(RequestVideoLessonEvent event, Emitter<SectionState> emitter) async {
    try {
      await loading(() async {
        _processEntity = await ListenDao.process(event.courseLessonId);
        emitter(RequestVideoLessonState(event.courseLessonId,event.courseType));
      });
    } catch (e) {
      if (e is ApiException) {
        showToast(e.message??'请求失败,请检查网络连接');
      }
    }
  }


  void _requestEnterClass(RequestEnterClassEvent event,Emitter<SectionState> emitter) async {
    try {
      await loading(() async {
         await ListenDao.enterClass(event.courseLessonId);
         emitter(RequestEnterClassState(event.courseLessonId,event.courseType));
      });
    } catch (e) {
      if (e is ApiException) {
        showToast(e.message??'请求失败,请检查网络连接');
      }
    }
  }

  void _requestExitClass(RequestExitClassEvent event,Emitter<SectionState> emitter) async {
    await ListenDao.exitClass(event.courseLessonId,event.currentStep,event.currentTime);
  }
}