import 'dart:io';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:generp/Models/hrmModels/tourExpensesAddViewResponse.dart';
import 'package:intl/intl.dart';
import 'package:provider/provider.dart';

import '../../Models/hrmModels/tourExpensesListResponse.dart';
import '../../services/api_calling.dart';
import '../HomeScreenNotifier.dart';

class TourExpensesProvider extends ChangeNotifier {
  tourExpensesListResponse? _response;
  bool _isLoading = false;
  String? _errorMessage;

  tourExpensesListResponse? get response => _response;
  bool get isLoading => _isLoading;
  String? get errorMessage => _errorMessage;

  tourExpensesAddViewResponse? _response2;

  tourExpensesAddViewResponse? get response2 => _response2;
  List<String> get daAmountList =>
      _response2?.daAmount?.map((e) => e.toString()).toList() ?? [];

  List<String> get tourTypeList => _response2?.tourType ?? [];

  List<String> get travelTypeList => _response2?.travelType ?? [];


  // Controllers for Add form
  final TextEditingController fromDateField = TextEditingController();
  final TextEditingController toDateField = TextEditingController();
  final TextEditingController dateController = TextEditingController();
  DateTime? _date;
  DateTime? _fromDate;
  DateTime? _toDate;

  /// Format date (yyyy-MM-dd)
  String _formatDate(DateTime date) {
    return DateFormat('yyyy-MM-dd').format(date);
  }

  /// Set single date
  void setDate(DateTime newDate) {
    _date = newDate;
    dateController.text = _formatDate(newDate);
    notifyListeners();
  }

  /// Fetch tour expenses list
  Future<void> fetchTourExpenses(BuildContext context, String pageNumber,
      {bool append = false}) async {
    _isLoading = true;
    _errorMessage = null;
    notifyListeners();

    try {
      final provider = Provider.of<HomescreenNotifier>(context, listen: false);

      final result = await ApiCalling.tourExpensesListAPI(
        provider.empId,
        provider.session,
        pageNumber,
      );

      debugPrint(
          'empId: ${provider.empId}, session: ${provider.session}, pageNumber: $pageNumber');

      if (result != null) {
        if (append && _response != null && _response!.tourList != null) {
          // Append with deduplication
          final existingIds = _response!.tourList!.map((e) => e.id).toSet();
          final newItems = (result.tourList ?? [])
              .where((item) => !existingIds.contains(item.id))
              .toList();

          _response!.tourList!.addAll(newItems);
        } else {
          // First page or refresh
          _response = result;
        }
      } else {
        _errorMessage = "No data found!";
      }
    } catch (e) {
      _errorMessage = "Error: $e";
    }

    _isLoading = false;
    notifyListeners();
  }



  Future<void> fetchTourExpensesAddView(BuildContext context, String tourBillId) async {
    _isLoading = true;
    _errorMessage = null;
    notifyListeners();

    try {
      final provider = Provider.of<HomescreenNotifier>(context, listen: false);

      final result = await ApiCalling.tourExpensesAddViewAPI(
        provider.empId,
        provider.session,
        tourBillId,
      );

      debugPrint('empId: ${provider.empId}, session: ${provider.session}, tourBillId: $tourBillId');

      if (result != null) {
        _response2 = result;
      } else {
        _errorMessage = "No data found!";
      }
    } catch (e) {
      _errorMessage = "Error: $e";
    }

    _isLoading = false;
    notifyListeners();
  }

  Future<bool> addTourBill({
    required BuildContext context,
    required String placeOfVisit,
    required String daAmount,
    required String tourType,
    required String tourDate,
    required List<Map<String, dynamic>> travelExpenses,
    required List<Map<String, dynamic>> hotelExpenses,
    required List<Map<String, dynamic>> otherExpenses,
    List<File>? travelImages,
    List<File>? hotelImages,
    List<File>? otherImages,
  }) async {
    _isLoading = true;
    _errorMessage = null;
    notifyListeners();

    try {
      final homeProvider = Provider.of<HomescreenNotifier>(context, listen: false);

      if ((homeProvider.session ?? "").isEmpty || (homeProvider.empId ?? "").isEmpty) {
        _errorMessage = "Invalid session or employee ID";
        _isLoading = false;
        notifyListeners();
        return false;
      }

      debugPrint("Submitting Tour Bill => "
          "place: $placeOfVisit, da: $daAmount, type: $tourType, "
          "date: $tourDate, travelExp: ${travelExpenses.length}, "
          "hotelExp: ${hotelExpenses.length}, "
          "otherExp: ${otherExpenses.length}, "
          "travelImages: ${travelImages?.length}, "
          "hotelImages: ${hotelImages?.length},"
          "otherImages: ${otherImages?.length}");

      final result = await ApiCalling.addTourBillAPI(
        sessionId: homeProvider.session ?? "",
        empId: homeProvider.empId ?? "",
        placeOfVisit: placeOfVisit,
        daAmount: daAmount,
        tourType: tourType,
        tourDate: tourDate,
        travelExpenses: travelExpenses,
        hotelExpenses: hotelExpenses,
        otherExpenses: otherExpenses,
        travelImages: travelImages,
        hotelImages: hotelImages,
        otherImages: otherImages,
      );

      if (result != null) {
        debugPrint(" Tour Bill Added Successfully");
        _isLoading = false;
        notifyListeners();
        return true;
      } else {
        _errorMessage = "Failed to add Tour Bill";
        _isLoading = false;
        notifyListeners();
        return false;
      }
    } catch (e) {
      _errorMessage = "Error: $e";
      _isLoading = false;
      notifyListeners();
      return false;
    }
  }



  /// Show Cupertino DatePicker for leave form
  /// Show Cupertino DatePicker for leave form
  Future<DateTime?> showDatePickerDialog(BuildContext context,
      {bool isFromDate = true}) async {
    DateTime currentDate = DateTime.now();
    DateTime? pickedDate;

    await showCupertinoModalPopup<void>(
      context: context,
      builder: (BuildContext context) => Container(
        height: 250,
        padding: const EdgeInsets.only(top: 6.0),
        margin: EdgeInsets.only(
          bottom: MediaQuery.of(context).viewInsets.bottom,
        ),
        color: CupertinoColors.systemBackground.resolveFrom(context),
        child: SafeArea(
          top: false,
          child: Column(
            children: [
              SizedBox(
                height: 55,
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    CupertinoButton(
                      child: const Text("Cancel",
                          style: TextStyle(color: Colors.blue)),
                      onPressed: () => Navigator.pop(context),
                    ),
                    CupertinoButton(
                      child: const Text("Done",
                          style: TextStyle(color: Colors.blue)),
                      onPressed: () {
                        pickedDate = currentDate;
                        if (isFromDate) {
                          fromDateField.text = _formatDate(pickedDate!);
                        } else {
                          toDateField.text = _formatDate(pickedDate!);
                        }
                        Navigator.pop(context);
                      },
                    ),
                  ],
                ),
              ),
              Expanded(
                child: CupertinoDatePicker(
                  dateOrder: DatePickerDateOrder.dmy,
                  initialDateTime: currentDate,
                  mode: CupertinoDatePickerMode.date,
                  onDateTimeChanged: (DateTime newDate) {
                    currentDate = newDate;
                  },
                ),
              ),
            ],
          ),
        ),
      ),
    );

    return pickedDate;
  }


}