import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:provider/provider.dart';
import 'package:test_sa/controllers/api_routes/http_status_manger.dart';
import 'package:test_sa/controllers/providers/api/gas_refill_provider.dart';
import 'package:test_sa/controllers/providers/api/user_provider.dart';
import 'package:test_sa/controllers/providers/settings/setting_provider.dart';
import 'package:test_sa/controllers/validator/validator.dart';
import 'package:test_sa/extensions/context_extension.dart';
import 'package:test_sa/extensions/int_extensions.dart';
import 'package:test_sa/extensions/widget_extensions.dart';
import 'package:test_sa/models/lookup.dart';
import 'package:test_sa/models/timer_model.dart';
import 'package:test_sa/new_views/common_widgets/app_filled_button.dart';
import 'package:test_sa/views/widgets/loaders/loading_manager.dart';

import '../../../../controllers/providers/api/hospitals_provider.dart';
import '../../../../extensions/text_extensions.dart';
import '../../../../models/new_models/gas_refill_model.dart';
import '../../../../new_views/common_widgets/app_text_form_field.dart';
import '../../../../new_views/common_widgets/default_app_bar.dart';
import '../../../../new_views/common_widgets/single_item_drop_down_menu.dart';
import '../../../../providers/gas_request_providers/gas_status_provider.dart';
import '../../../widgets/e_signature/e_signature.dart';
import '../../../widgets/timer/app_timer.dart';

class RequestGasRefill extends StatefulWidget {
  static const String id = "/request-gas-refill";
  final GasRefillModel gasRefillModel;

  const RequestGasRefill({this.gasRefillModel, Key key}) : super(key: key);

  @override
  State<RequestGasRefill> createState() => _RequestGasRefillState();
}

class _RequestGasRefillState extends State<RequestGasRefill> {
  bool _isLoading = false;
  bool _validate = false;
  Uint8List _engineerSignature;
  Uint8List _nurseSignature;


  UserProvider _userProvider;
  SettingProvider _settingProvider;
  GasRefillProvider _gasRefillProvider;
  GasRefillDetails _currentDetails = GasRefillDetails();
  final TextEditingController _deliveredQuantityController = TextEditingController();
  final TextEditingController _commentController = TextEditingController();
  final TextEditingController _workingHoursController = TextEditingController();

  GasRefillModel _formModel = GasRefillModel(gazRefillDetails: []);
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
  final GlobalKey _DetailsKey = GlobalKey<FormState>();
  final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();
  bool _firstTime = true;

  @override
  void initState() {
    super.initState();
    if (widget.gasRefillModel != null) {
      _formModel.fromGasRefillModel(widget.gasRefillModel);
    }
  }

  @override
  void setState(VoidCallback fn) {
    if (mounted) super.setState(() {});
  }

  _onSubmit(BuildContext context) async {
    if (_formModel.timer?.startAt == null) {
      await Fluttertoast.showToast(msg: "Working Hours Required");
      return false;
    }
    if (_formModel.timer?.endAt == null) {
      await Fluttertoast.showToast(msg: "Please Stop The Timer");
      return false;
    }
    if (_formModel.gazRefillDetails.isEmpty) {
      if (!(await _addNewModel(context))) return;
    }

    setState(() {});
    _formKey.currentState.save();

    int status = widget.gasRefillModel == null
        ? null /*await _gasRefillProvider.createModel(
            user: _userProvider.user,
            model: _formModel,
          )*/
        : await _gasRefillProvider.updateModel(
            user: _userProvider.user,
            host: _settingProvider.host,
            oldModel: widget.gasRefillModel,
            newModel: _formModel,
          );
    //_isLoading = false;
    setState(() {});
    if (status >= 200 && status < 300) {
      Fluttertoast.showToast(
        msg: context.translation.successfulRequestMessage,
      );
      Navigator.of(context).pop(_formModel);
      setState(() {});
    } else {
      String errorMessage = HttpStatusManger.getStatusMessage(status: status, subtitle: context.translation);
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
        content: Text(errorMessage),
      ));
    }
  }

  Future<bool> _addNewModel(BuildContext context) async {
    _validate = true;
    if (!_formKey.currentState.validate()) {
      setState(() {});
      return false;
    }
    _formKey.currentState.save();
    if (!(await _currentDetails.validate(context))) {
      setState(() {});
      return false;
    }

    _formModel.gazRefillDetails.insert(0, _currentDetails);
    _validate = false;
    Scrollable.ensureVisible(_DetailsKey.currentContext);
    _deliveredQuantityController.clear();
    _workingHoursController.clear();
    _commentController.clear();
    _currentDetails = GasRefillDetails();
    setState(() {});
    return true;
  }

  @override
  void dispose() {
    _deliveredQuantityController.dispose();
    _commentController.dispose();
    _workingHoursController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    _userProvider = Provider.of<UserProvider>(context);
    _settingProvider = Provider.of<SettingProvider>(context);
    if (_gasRefillProvider == null) {
      _gasRefillProvider = Provider.of<GasRefillProvider>(context, listen: false);
      //_gasRefillProvider.reset();
    }
    if (_firstTime) {
      String _clientName;
      if (widget.gasRefillModel != null) {
        //_formModel.status = widget.gasRefillModel?.status ?? Lookup(value: 0);
        _gasRefillProvider.expectedDateTime = DateTime.tryParse(_formModel.expectedDate ?? "");
        _formModel.timer = TimerModel(startAt: DateTime.tryParse(widget.gasRefillModel?.startDate ?? ""), endAt: DateTime.tryParse(widget.gasRefillModel?.endDate ?? ""));
        _clientName = _formModel.site.custName;
      } else {
        _formModel.timer = null;
        _clientName = _userProvider.user?.clientName;
      }

      HospitalsProvider().getHospitalsListByVal(searchVal: _clientName).then((value) {
        _gasRefillProvider.hospital = value?.firstWhere((element) => element.name == _clientName, orElse: () => null);
        _gasRefillProvider.building = _gasRefillProvider.hospital?.buildings?.firstWhere((element) => element.name == widget.gasRefillModel?.building?.name, orElse: () => null);
        _gasRefillProvider.floor = _gasRefillProvider.building?.floors?.firstWhere((element) => element.name == widget.gasRefillModel?.floor?.name, orElse: () => null);
        _gasRefillProvider.department = _gasRefillProvider.floor?.departments?.firstWhere((element) => element.name == widget.gasRefillModel?.department?.departmentName, orElse: () => null);
        _firstTime = false;
        setState(() {});
      });
    }
    return Scaffold(
      appBar: DefaultAppBar(title: context.translation.updateRequest),
      key: _scaffoldKey,
      body: Form(
        key: _formKey,
        child: SafeArea(
          child: LoadingManager(
              isLoading: _isLoading,
              isFailedLoading: false,
              stateCode: 200,
              onRefresh: () async {},
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  SingleChildScrollView(
                    padding: const EdgeInsets.all(16),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            context.translation.gasRefill.heading5(context),
                            8.height,

                            /// TBD
                            '${context.translation.gasRequest}:'.bodyText(context),
                            '${context.translation.cylinderSize}: ${widget.gasRefillModel.gazRefillDetails[0].cylinderSize.value}'.bodyText(context),
                            '${context.translation.quantity}: ${widget.gasRefillModel.gazRefillDetails[0].requestedQty}'.bodyText(context),
                            '${context.translation.site}: ${widget.gasRefillModel.site.name}'.bodyText(context),
                          ],
                        ).toShadowContainer(context),
                        8.height,
                        AppTimer(
                          label: context.translation.workingHours,
                          timer: _formModel.timer,
                          enabled: _formModel.endDate == null,
                          onChange: (timer) async {
                            _formModel.timer = timer;
                            return true;
                          },
                        ),
                        8.height,
                        SingleItemDropDownMenu<Lookup, GasStatusProvider>(
                          context: context,
                          title: context.translation.reportStatus,
                          initialValue: _formModel.status,
                          onSelect: (value) {
                            _formModel.status = value;
                          },
                        ),
                        8.height,
                        AppTextFormField(
                          labelText: context.translation.deliveredQuantity,
                          onSaved: (value) {
                            _currentDetails?.deliverdQty = double.tryParse(value);
                          },
                          textInputType: TextInputType.number,
                          controller: _deliveredQuantityController,
                          validator: (value) => Validator.isNumeric(value) ? null : "allow numbers only",
                        ),
                        8.height,

                        /// TBD
                        AppTextFormField(
                          labelText: context.translation.comments,
                          textInputType: TextInputType.multiline,
                          alignLabelWithHint: true,
                          controller: _commentController,
                          onSaved: (value) {},
                        ),
                        8.height,
                        ESignature(
                          title: "Engineer Signature",
                          oldSignature: widget.gasRefillModel.engSignature,
                          newSignature: _engineerSignature,
                          onSaved: (signature) {
                            _engineerSignature = signature;
                            if (signature == null || signature.isEmpty) return;
                            _formModel.engSignature = "${DateTime.now().toIso8601String()}.png|${base64Encode(signature)}";
                             base64Encode(signature);
                          },
                        ),
                        8.height,
                        ESignature(
                          title: "Nurse Signature",
                          oldSignature: widget.gasRefillModel.nurseSignature,
                          newSignature: _nurseSignature,
                          onSaved: (signature) {
                            _nurseSignature = signature;
                            if (signature == null || signature.isEmpty) return;
                                _formModel.nurseSignature = "${DateTime.now().toIso8601String()}.png|${base64Encode(signature)}";
                             base64Encode(signature);
                          },
                        ),
                      ],
                    ),
                  ).expanded,
                  AppFilledButton(
                    label: widget.gasRefillModel == null ? context.translation.submit : context.translation.update,
                    onPressed: () async {
                      _onSubmit.call(context);
                    },
                  ).paddingAll(16),
                ],
              )),
        ),
      ),
    );
  }
}