import 'dart:async';

import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';
import 'package:flutter/material.dart';
import 'package:syncrow_web/pages/routiens/models/create_scene_and_autoamtion/create_automation_model.dart';
import 'package:syncrow_web/pages/routiens/models/create_scene_and_autoamtion/create_scene_model.dart';
import 'package:syncrow_web/pages/routiens/models/device_functions.dart';
import 'package:syncrow_web/pages/routiens/models/routine_model.dart';
import 'package:syncrow_web/services/routines_api.dart';

part 'routine_event.dart';
part 'routine_state.dart';

const spaceId = '25c96044-fadf-44bb-93c7-3c079e527ce6';
const communityId = 'aff21a57-2f91-4e5c-b99b-0182c3ab65a9';

class RoutineBloc extends Bloc<RoutineEvent, RoutineState> {
  RoutineBloc() : super(const RoutineState()) {
    on<AddToIfContainer>(_onAddToIfContainer);
    on<AddToThenContainer>(_onAddToThenContainer);
    on<LoadScenes>(_onLoadScenes);
    on<LoadAutomation>(_onLoadAutomation);
    on<AddFunctionToRoutine>(_onAddFunctionsToRoutine);
    on<SearchRoutines>(_onSearchRoutines);
    on<AddSelectedIcon>(_onAddSelectedIcon);
    on<CreateSceneEvent>(_onCreateScene);
    on<RemoveDragCard>(_onRemoveDragCard);
    on<ChangeAutomationOperator>(_changeOperatorOperator);
    on<EffectiveTimePeriodEvent>(_onEffectiveTimeEvent);
    on<CreateAutomationEvent>(_onCreateAutomation);
    on<SetRoutineName>(_onSetRoutineName);
    on<ResetRoutineState>(_onResetRoutineState);
    // on<RemoveFunction>(_onRemoveFunction);
    // on<ClearFunctions>(_onClearFunctions);
  }

  void _onAddToIfContainer(AddToIfContainer event, Emitter<RoutineState> emit) {
    final updatedIfItems = List<Map<String, dynamic>>.from(state.ifItems);

    // Find the index of the item in teh current itemsList
    int index =
        updatedIfItems.indexWhere((map) => map['uniqueCustomId'] == event.item['uniqueCustomId']);
    // Replace the map if the index is valid
    if (index != -1) {
      updatedIfItems[index] = event.item;
    } else {
      updatedIfItems.add(event.item);
    }

    if (event.isTabToRun) {
      emit(state.copyWith(ifItems: updatedIfItems, isTabToRun: true, isAutomation: false));
    } else {
      emit(state.copyWith(ifItems: updatedIfItems, isTabToRun: false, isAutomation: true));
    }
  }

  void _onAddToThenContainer(AddToThenContainer event, Emitter<RoutineState> emit) {
    final currentItems = List<Map<String, dynamic>>.from(state.thenItems);

    // Find the index of the item in teh current itemsList
    int index =
        currentItems.indexWhere((map) => map['uniqueCustomId'] == event.item['uniqueCustomId']);
    // Replace the map if the index is valid
    if (index != -1) {
      currentItems[index] = event.item;
    } else {
      currentItems.add(event.item);
    }

    emit(state.copyWith(thenItems: currentItems));
  }

  void _onAddFunctionsToRoutine(AddFunctionToRoutine event, Emitter<RoutineState> emit) {
    try {
      if (event.functions.isEmpty) return;

      List<DeviceFunctionData> selectedFunction = List<DeviceFunctionData>.from(event.functions);

      Map<String, List<DeviceFunctionData>> currentSelectedFunctions =
          Map<String, List<DeviceFunctionData>>.from(state.selectedFunctions);
      if (currentSelectedFunctions.containsKey(event.uniqueCustomId)) {
        List<DeviceFunctionData> currentFunctions =
            List<DeviceFunctionData>.from(currentSelectedFunctions[event.uniqueCustomId] ?? []);

        List<String> functionCode = [];
        for (int i = 0; i < selectedFunction.length; i++) {
          for (int j = 0; j < currentFunctions.length; j++) {
            if (selectedFunction[i].functionCode == currentFunctions[j].functionCode) {
              currentFunctions[j] = selectedFunction[i];
              if (!functionCode.contains(currentFunctions[j].functionCode)) {
                functionCode.add(currentFunctions[j].functionCode);
              }
            }
          }
        }

        for (int i = 0; i < functionCode.length; i++) {
          selectedFunction.removeWhere((code) => code.functionCode == functionCode[i]);
        }

        currentSelectedFunctions[event.uniqueCustomId] = List.from(currentFunctions)
          ..addAll(selectedFunction);
      } else {
        currentSelectedFunctions[event.uniqueCustomId] = List.from(event.functions);
      }

      emit(state.copyWith(selectedFunctions: currentSelectedFunctions));
    } catch (e) {
      debugPrint('Error adding functions: $e');
    }
  }

  Future<void> _onLoadScenes(LoadScenes event, Emitter<RoutineState> emit) async {
    emit(state.copyWith(isLoading: true, errorMessage: null));

    try {
      final scenes = await SceneApi.getScenesByUnitId(event.unitId, event.communityId);
      emit(state.copyWith(
        scenes: scenes,
        isLoading: false,
      ));
    } catch (e) {
      emit(state.copyWith(
        isLoading: false,
        loadScenesErrorMessage: 'Failed to load scenes',
        errorMessage: '',
        loadAutomationErrorMessage: '',
      ));
    }
  }

  Future<void> _onLoadAutomation(LoadAutomation event, Emitter<RoutineState> emit) async {
    emit(state.copyWith(isLoading: true, errorMessage: null));

    try {
      final automations = await SceneApi.getAutomationByUnitId(event.unitId);
      if (automations.isNotEmpty) {
        emit(state.copyWith(
          automations: automations,
          isLoading: false,
        ));
      } else {
        emit(state.copyWith(
          isLoading: false,
          loadAutomationErrorMessage: 'Failed to load automations',
          errorMessage: '',
          loadScenesErrorMessage: '',
        ));
      }
    } catch (e) {
      emit(state.copyWith(
        isLoading: false,
        loadAutomationErrorMessage: 'Failed to load automations',
        errorMessage: '',
        loadScenesErrorMessage: '',
      ));
    }
  }

  FutureOr<void> _onSearchRoutines(SearchRoutines event, Emitter<RoutineState> emit) async {
    emit(state.copyWith(isLoading: true, errorMessage: null));
    await Future.delayed(const Duration(seconds: 1));
    emit(state.copyWith(isLoading: false, errorMessage: null));
    emit(state.copyWith(searchText: event.query));
  }

  FutureOr<void> _onAddSelectedIcon(AddSelectedIcon event, Emitter<RoutineState> emit) {
    emit(state.copyWith(selectedIcon: event.icon));
  }

  bool _isFirstActionDelay(List<Map<String, dynamic>> actions) {
    if (actions.isEmpty) return false;
    return actions.first['deviceId'] == 'delay';
  }

  Future<void> _onCreateScene(CreateSceneEvent event, Emitter<RoutineState> emit) async {
    try {
      // Check if first action is delay
      if (_isFirstActionDelay(state.thenItems)) {
        emit(state.copyWith(
          errorMessage: 'Cannot have delay as the first action',
          isLoading: false,
        ));
        return;
      }

      emit(state.copyWith(isLoading: true));

      final actions = state.thenItems.expand((item) {
        final functions = state.selectedFunctions[item['uniqueCustomId']] ?? [];
        return functions.map((function) {
          if (function.functionCode == 'automation') {
            return CreateSceneAction(
              entityId: function.entityId,
              actionExecutor: function.value,
              executorProperty: null,
            );
          }

          if (item['deviceId'] == 'delay') {
            return CreateSceneAction(
              entityId: function.entityId,
              actionExecutor: 'delay',
              executorProperty: CreateSceneExecutorProperty(
                functionCode: '',
                functionValue: '',
                delaySeconds: int.tryParse(function.value.toString()) ?? 0,
              ),
            );
          }

          return CreateSceneAction(
            entityId: function.entityId,
            actionExecutor: 'device_issue',
            executorProperty: CreateSceneExecutorProperty(
              functionCode: function.functionCode,
              functionValue: function.value,
              delaySeconds: 0,
            ),
          );
        });
      }).toList();

      final createSceneModel = CreateSceneModel(
        spaceUuid: spaceId,
        iconId: state.selectedIcon ?? '',
        showInDevice: true,
        sceneName: state.routineName!,
        decisionExpr: 'and',
        actions: actions,
      );

      final result = await SceneApi.createScene(createSceneModel);
      if (result['success']) {
        emit(_resetState());
        add(const LoadScenes(spaceId, communityId));
      } else {
        emit(state.copyWith(
          isLoading: false,
          errorMessage: result['message'],
        ));
      }
    } catch (e) {
      emit(state.copyWith(
        isLoading: false,
        errorMessage: 'Something went wrong',
      ));
    }
  }

  Future<void> _onCreateAutomation(CreateAutomationEvent event, Emitter<RoutineState> emit) async {
    try {
      if (state.routineName == null || state.routineName!.isEmpty) {
        emit(state.copyWith(
          errorMessage: 'Automation name is required',
        ));
        return;
      }

      emit(state.copyWith(isLoading: true));

      final conditions = state.ifItems.expand((item) {
        final functions = state.selectedFunctions[item['uniqueCustomId']] ?? [];
        return functions.map((function) {
          return Condition(
            code: state.selectedFunctions[item['uniqueCustomId']]!.indexOf(
                  function,
                ) +
                1,
            entityId: function.entityId,
            entityType: 'device_report',
            expr: ConditionExpr(
              statusCode: function.functionCode,
              comparator: function.condition ?? '==',
              statusValue: function.value,
            ),
          );
        });
      }).toList();

      if (conditions.isEmpty) {
        emit(state.copyWith(
          isLoading: false,
          errorMessage: 'At least one condition is required',
        ));
        return;
      }

      final actions = state.thenItems.expand((item) {
        final functions = state.selectedFunctions[item['uniqueCustomId']] ?? [];
        return functions.map((function) {
          if (function.functionCode == 'automation') {
            return AutomationAction(
              entityId: function.entityId,
              actionExecutor: function.value,
            );
          }

          if (item['deviceId'] == 'delay') {
            return AutomationAction(
              entityId: function.entityId,
              actionExecutor: 'delay',
              executorProperty: ExecutorProperty(
                delaySeconds: int.tryParse(function.value.toString()) ?? 0,
              ),
            );
          }

          return AutomationAction(
            entityId: function.entityId,
            actionExecutor: 'device_issue',
            executorProperty: ExecutorProperty(
              functionCode: function.functionCode,
              functionValue: function.value,
            ),
          );
        });
      }).toList();

      final createAutomationModel = CreateAutomationModel(
        spaceUuid: spaceId,
        automationName: state.routineName!,
        decisionExpr: state.selectedAutomationOperator,
        effectiveTime: EffectiveTime(
          start: state.effectiveTime?.start ?? '00:00',
          end: state.effectiveTime?.end ?? '23:59',
          loops: state.effectiveTime?.loops ?? '1111111',
        ),
        conditions: conditions,
        actions: actions,
      );

      final result = await SceneApi.createAutomation(createAutomationModel);
      if (result['success']) {
        emit(_resetState());
        add(const LoadAutomation(spaceId));
      } else {
        emit(state.copyWith(
          isLoading: false,
          errorMessage: result['message'],
        ));
      }
    } catch (e) {
      emit(state.copyWith(
        isLoading: false,
        errorMessage: 'Something went wrong',
      ));
    }
  }

  FutureOr<void> _onRemoveDragCard(RemoveDragCard event, Emitter<RoutineState> emit) {
    if (event.isFromThen) {
      final thenItems = List<Map<String, dynamic>>.from(state.thenItems);
      final selectedFunctions = Map<String, List<DeviceFunctionData>>.from(state.selectedFunctions);

      thenItems.removeAt(event.index);
      selectedFunctions.remove(event.key);
      emit(state.copyWith(thenItems: thenItems, selectedFunctions: selectedFunctions));
    } else {
      final ifItems = List<Map<String, dynamic>>.from(state.ifItems);
      final selectedFunctions = Map<String, List<DeviceFunctionData>>.from(state.selectedFunctions);

      ifItems.removeAt(event.index);
      selectedFunctions.remove(event.key);
      emit(state.copyWith(ifItems: ifItems, selectedFunctions: selectedFunctions));
    }
  }

  FutureOr<void> _changeOperatorOperator(ChangeAutomationOperator event, Emitter<RoutineState> emit) {
    emit(state.copyWith(
      selectedAutomationOperator: event.operator,
    ));
  }

  FutureOr<void> _onEffectiveTimeEvent(EffectiveTimePeriodEvent event, Emitter<RoutineState> emit) {
    emit(state.copyWith(effectiveTime: event.effectiveTime));
  }

  FutureOr<void> _onSetRoutineName(SetRoutineName event, Emitter<RoutineState> emit) {
    emit(state.copyWith(routineName: event.name));
  }

  RoutineState _resetState() {
    return const RoutineState(
      ifItems: [],
      thenItems: [],
      selectedFunctions: {},
      scenes: [],
      automations: [],
      isLoading: false,
      errorMessage: null,
      loadScenesErrorMessage: null,
      loadAutomationErrorMessage: null,
      searchText: '',
      selectedIcon: null,
      isTabToRun: false,
      isAutomation: false,
      selectedAutomationOperator: 'AND',
      effectiveTime: null,
      routineName: null,
    );
  }

  FutureOr<void> _onResetRoutineState(ResetRoutineState event, Emitter<RoutineState> emit) {
    emit(_resetState());
  }
}