import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:syncrow_web/pages/access_management/bloc/access_event.dart';
import 'package:syncrow_web/pages/access_management/bloc/access_state.dart';
import 'package:syncrow_web/pages/access_management/model/password_model.dart';
import 'package:syncrow_web/services/access_mang_api.dart';
import 'package:syncrow_web/utils/color_manager.dart';
import 'package:syncrow_web/utils/constants/const.dart';
import 'package:syncrow_web/utils/snack_bar.dart';

class AccessBloc extends Bloc<AccessEvent, AccessState> {
  AccessBloc() : super((AccessInitial())) {
    on<FetchTableData>(_onFetchTableData);
    // on<TabChangedEvent>(selectFilterTap);
    on<SelectTime>(selectTime);
    on<FilterDataEvent>(_filterData);
    on<ResetSearch>(resetSearch);
    on<TabChangedEvent>(onTabChanged);
  }
  String startTime = 'Start Date';
  String endTime = 'End Date';

  int? effectiveTimeTimeStamp;
  int? expirationTimeTimeStamp;
  TextEditingController passwordName = TextEditingController();
  List<PasswordModel> filteredData = [];
  List<PasswordModel> data = [];

  Future<void> _onFetchTableData(
      FetchTableData event, Emitter<AccessState> emit) async {
    try {
      emit(AccessLoaded());
      data = await AccessMangApi().fetchVisitorPassword();
      filteredData = data;
      updateTabsCount();
      emit(TableLoaded(data));
    } catch (e) {
      emit(FailedState(e.toString()));
    }
  }

  void updateTabsCount() {
    int toBeEffectiveCount = data
        .where((item) => item.passwordStatus.value == 'To Be Effective')
        .length;
    int effectiveCount =
        data.where((item) => item.passwordStatus.value == 'Effective').length;
    int expiredCount =
        data.where((item) => item.passwordStatus.value == 'Expired').length;
    tabs[1] = 'To Be Effective ($toBeEffectiveCount)';
    tabs[2] = 'Effective ($effectiveCount)';
    tabs[3] = 'Expired ($expiredCount)';
  }

  int selectedIndex = 0;
  final List<String> tabs = [
    'All',
    'To Be Effective (0)',
    'Effective (0)',
    'Expired'
  ];

  Future selectFilterTap(
      TabChangedEvent event, Emitter<AccessState> emit) async {
    try {
      emit(AccessLoaded());
      selectedIndex = event.selectedIndex;
      emit(AccessInitial());
      emit(TableLoaded(data));
    } catch (e) {
      emit(FailedState(e.toString()));
      return;
    }
  }

  Future<void> selectTime(SelectTime event, Emitter<AccessState> emit) async {
    emit(AccessLoaded());

    final DateTime? picked = await showDatePicker(
      context: event.context,
      initialDate: DateTime.now(),
      firstDate: DateTime(2015, 8),
      lastDate: DateTime(2101),
    );
    if (picked != null) {
      final TimeOfDay? timePicked = await showTimePicker(
        context: event.context,
        initialTime: TimeOfDay.now(),
        builder: (context, child) {
          return Theme(
            data: ThemeData.light().copyWith(
              colorScheme: const ColorScheme.light(
                primary: ColorsManager.primaryColor,
                onSurface: Colors.black,
              ),
              buttonTheme: const ButtonThemeData(
                colorScheme: ColorScheme.light(
                  primary: Colors.green,
                ),
              ),
            ),
            child: child!,
          );
        },
      );
      if (timePicked != null) {
        final selectedDateTime = DateTime(
          picked.year,
          picked.month,
          picked.day,
          timePicked.hour,
          timePicked.minute,
        );
        final selectedTimestamp = DateTime(
              selectedDateTime.year,
              selectedDateTime.month,
              selectedDateTime.day,
              selectedDateTime.hour,
              selectedDateTime.minute,
            ).millisecondsSinceEpoch ~/
            1000; // Divide by 1000 to remove milliseconds
        if (event.isStart) {
          if (expirationTimeTimeStamp != null &&
              selectedTimestamp > expirationTimeTimeStamp!) {
            CustomSnackBar.displaySnackBar(
                'Effective Time cannot be later than Expiration Time.');
          } else {
            startTime = selectedDateTime
                .toString()
                .split('.')
                .first; // Remove seconds and milliseconds
            effectiveTimeTimeStamp = selectedTimestamp;
          }
        } else {
          if (effectiveTimeTimeStamp != null &&
              selectedTimestamp < effectiveTimeTimeStamp!) {
            CustomSnackBar.displaySnackBar(
                'Expiration Time cannot be earlier than Effective Time.');
          } else {
            endTime = selectedDateTime
                .toString()
                .split('.')
                .first; // Remove seconds and milliseconds
            expirationTimeTimeStamp = selectedTimestamp;
          }
        }
      }
    }
    emit(ChangeTimeState());
  }

  Future<void> _filterData(
      FilterDataEvent event, Emitter<AccessState> emit) async {
    emit(AccessLoaded());
    try {
      filteredData = data.where((item) {
        bool matchesCriteria = true;
        if (event.passwordName != null && event.passwordName!.isNotEmpty) {
          final bool matchesName = item.passwordName != null &&
              item.passwordName.contains(event.passwordName);
          if (!matchesName) {
            matchesCriteria = false;
          }
        }
        if (event.startTime != null && event.endTime != null) {
          final int? effectiveTime =
              int.tryParse(item.effectiveTime.toString());
          final int? invalidTime = int.tryParse(item.invalidTime.toString());
          if (effectiveTime == null || invalidTime == null) {
            matchesCriteria = false;
          } else {
            final bool matchesStartTime = effectiveTime >= event.startTime!;
            final bool matchesEndTime = invalidTime <= event.endTime!;
            if (!matchesStartTime || !matchesEndTime) {
              matchesCriteria = false;
            }
          }
        }
        if (event.selectedTabIndex == 1 &&
            item.passwordStatus.value != 'To Be Effective') {
          matchesCriteria = false;
        } else if (event.selectedTabIndex == 2 &&
            item.passwordStatus.value != 'Effective') {
          matchesCriteria = false;
        } else if (event.selectedTabIndex == 3 &&
            item.passwordStatus.value != 'Expired') {
          matchesCriteria = false;
        }
        return matchesCriteria;
      }).toList();
      emit(TableLoaded(filteredData));
    } catch (e) {
      emit(FailedState(e.toString()));
    }
  }

  resetSearch(ResetSearch event, Emitter<AccessState> emit) async {
    emit(AccessLoaded());
    startTime = 'Start Time';
    endTime = 'End Time';
    passwordName.clear();
    selectedIndex = 0;
    effectiveTimeTimeStamp = null;
    expirationTimeTimeStamp = null;
    add(FetchTableData());
  }

  String timestampToDate(dynamic timestamp) {
    DateTime dateTime =
        DateTime.fromMillisecondsSinceEpoch(int.parse(timestamp) * 1000);
    return "${dateTime.year}/${dateTime.month.toString().padLeft(2, '0')}/${dateTime.day.toString().padLeft(2, '0')}";
  }

  Future<void> onTabChanged(
      TabChangedEvent event, Emitter<AccessState> emit) async {
    try {
      emit(AccessLoaded());
      selectedIndex = event.selectedIndex;
      switch (selectedIndex) {
        case 0: // All
          filteredData = data;
          break;
        case 1: // To Be Effective
          filteredData = data
              .where((item) => item.passwordStatus.value == "To Be Effective")
              .toList();
          break;
        case 2: // Effective
          filteredData = data
              .where((item) => item.passwordStatus.value == "Effective")
              .toList();
          break;
        case 3: // Expired
          filteredData = data
              .where((item) => item.passwordStatus.value == "Expired")
              .toList();
          break;
        default:
          filteredData = data;
      }
      add(FilterDataEvent(
          selectedTabIndex: selectedIndex,
          passwordName: passwordName.text.toLowerCase(),
          startTime: effectiveTimeTimeStamp,
          endTime: expirationTimeTimeStamp));
      emit(TableLoaded(filteredData));
    } catch (e) {
      emit(FailedState(e.toString()));
    }
  }
}