import 'dart:async';

import 'package:aitrainer_app/bloc/menu/menu_bloc.dart';
import 'package:aitrainer_app/model/cache.dart';
import 'package:aitrainer_app/model/customer_training_plan.dart';
import 'package:aitrainer_app/model/customer_training_plan_details.dart';
import 'package:aitrainer_app/model/exercise.dart';
import 'package:aitrainer_app/model/exercise_plan_detail.dart';
import 'package:aitrainer_app/model/workout_menu_tree.dart';
import 'package:aitrainer_app/repository/training_plan_repository.dart';
import 'package:aitrainer_app/service/exercise_service.dart';
import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';

part 'training_plan_event.dart';
part 'training_plan_state.dart';

class TrainingPlanBloc extends Bloc<TrainingPlanEvent, TrainingPlanState> {
  final TrainingPlanRepository trainingPlanRepository;
  final MenuBloc menuBloc;
  TrainingPlanBloc({required this.trainingPlanRepository, required this.menuBloc}) : super(TrainingPlanInitial());

  CustomerTrainingPlan? _myPlan;
  bool started = false;
  final List<String> dayNames = [];

  CustomerTrainingPlan? getMyPlan() => this._myPlan;
  setMyPlan(CustomerTrainingPlan? myPlan) => this._myPlan = myPlan;

  @override
  Stream<TrainingPlanState> mapEventToState(TrainingPlanEvent event) async* {
    try {
      if (event is TrainingPlanActivate) {
        yield TrainingPlanLoading();
        _myPlan = await trainingPlanRepository.activateTrainingPlan(event.trainingPlanId);
        this.activateDays();
        Cache().myTrainingPlan = _myPlan;
        await Cache().saveMyTrainingPlan();
        yield TrainingPlanFinished();
      } else if (event is TrainingPlanWeightChange) {
        yield TrainingPlanLoading();
        event.detail.weight = event.weight;

        yield TrainingPlanReady();
      } else if (event is TrainingPlanRepeatsChange) {
        yield TrainingPlanLoading();

        event.detail.repeats = event.repeats;

        yield TrainingPlanReady();
      } else if (event is TrainingPlanSaveExercise) {
        yield TrainingPlanLoading();

        event.detail.state = ExercisePlanDetailState.inProgress;
        final Exercise exercise = Exercise();
        exercise.customerId = Cache().userLoggedIn!.customerId!;
        exercise.exerciseTypeId = event.detail.exerciseTypeId;
        exercise.quantity = event.detail.repeats!.toDouble();
        exercise.unit = event.detail.exerciseType!.unit;
        exercise.unitQuantity = event.detail.weight;
        exercise.dateAdd = DateTime.now();
        event.detail.exercises.add(exercise);
        if (event.detail.exercises.length >= event.detail.set!) {
          event.detail.state = ExercisePlanDetailState.finished;
        } else if (event.detail.exercises.length >= 0) {
          event.detail.state = ExercisePlanDetailState.inProgress;
        }

        exercise.trainingPlanDetailsId = _myPlan!.trainingPlanId;

        // save Exercise
        await ExerciseApi().addExercise(exercise);
        Cache().addExercise(exercise);

        Cache().myTrainingPlan = _myPlan;
        await Cache().saveMyTrainingPlan();
        yield TrainingPlanReady();
      } else if (event is TrainingPlanSkipExercise) {
        yield TrainingPlanLoading();
        event.detail.state = ExercisePlanDetailState.skipped;
        Cache().myTrainingPlan = _myPlan;
        await Cache().saveMyTrainingPlan();
        yield TrainingPlanReady();
      }
    } on Exception catch (e) {
      yield TrainingPlanError(message: e.toString());
    }
  }

  void activateDays() {
    if (_myPlan == null) {
      return;
    }
    dayNames.clear();
    _myPlan!.days.clear();
    String dayName = ".";
    _myPlan!.details.forEach((element) {
      if (element.day != null && element.day != dayName) {
        dayNames.add(element.day!);
        dayName = element.day!;
      }
      if (_myPlan!.days[dayName] == null) {
        if (dayName == ".") {
          dayName = "";
        }
        _myPlan!.days[dayName] = [];
      }
      _myPlan!.days[dayName]!.add(element);
    });

    if (dayNames.length == 0) {
      dayNames.add("");
      _myPlan!.days[""] = [];
      _myPlan!.days[""]!.addAll(_myPlan!.details);
    }
  }

  CustomerTrainingPlanDetails? getTrainingPlanDetail(int trainingPlanDetailsId) {
    CustomerTrainingPlanDetails? detail;
    if (_myPlan == null || _myPlan!.details.isEmpty) {
      return null;
    }

    for (final det in this._myPlan!.details) {
      if (det.customerTrainingPlanDetailsId == trainingPlanDetailsId) {
        detail = det;
        break;
      }
    }

    return detail;
  }

  int? getActualWorkoutTreeId(int exerciseTypeId) {
    final WorkoutMenuTree? workoutTree = this.menuBloc.menuTreeRepository.getMenuItemByExerciseTypeId(exerciseTypeId);
    if (workoutTree == null) {
      return null;
    }
    return workoutTree.id;
  }

  String getActualImageName(int exerciseTypeId) {
    if (exerciseTypeId <= 0) {
      return "";
    }
    final WorkoutMenuTree? workoutTree = this.menuBloc.menuTreeRepository.getMenuItemByExerciseTypeId(exerciseTypeId);
    if (workoutTree == null) {
      return "";
    }

    return workoutTree.imageName;
  }

  CustomerTrainingPlanDetails? getNext() {
    if (_myPlan == null || _myPlan!.details.isEmpty) {
      return null;
    }

    CustomerTrainingPlanDetails? next;
    int minStep = 99;
    for (final detail in this._myPlan!.details) {
      if (!detail.state.equalsTo(ExercisePlanDetailState.finished)) {
        if (detail.exercises.isEmpty && !detail.state.equalsTo(ExercisePlanDetailState.skipped)) {
          next = detail;
          minStep = 1;
          break;
        } else {
          final int step = detail.exercises.length;
          if (step < minStep && !detail.state.equalsTo(ExercisePlanDetailState.skipped)) {
            next = detail;
            minStep = step;
            if (detail.parallel != true) {
              break;
            }
          }
        }
      }
    }
    print("Next detail $next");
    return next;
  }

  bool isStarted() {
    if (_myPlan == null || _myPlan!.details.isEmpty) {
      return false;
    }

    if (_myPlan!.details[0].state == ExercisePlanDetailState.start) {
      return false;
    } else {
      return true;
    }
  }

  double getOffset() {
    double offset = 5;
    if (_myPlan == null) {
      return offset;
    }
    int indexInProgress = 0;
    int indexInStart = 0;
    for (var detail in _myPlan!.details) {
      if (detail.state == ExercisePlanDetailState.inProgress) {
        break;
      }
      if (detail.state == ExercisePlanDetailState.start) {
        break;
      }
      indexInStart++;
      indexInProgress++;
    }
    int index = indexInStart > indexInProgress ? indexInStart : indexInProgress;
    offset = index * 80;
    return offset;
  }
}