// Dart imports:
import 'dart:io';

// Flutter imports:
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

// Package imports:
import 'package:contacts_service/contacts_service.dart';

// Project imports:
import 'package:invoiceninja_flutter/constants.dart';
import 'package:invoiceninja_flutter/data/models/models.dart';
import 'package:invoiceninja_flutter/ui/app/form_card.dart';
import 'package:invoiceninja_flutter/ui/app/forms/app_dropdown_button.dart';
import 'package:invoiceninja_flutter/ui/app/forms/custom_field.dart';
import 'package:invoiceninja_flutter/ui/app/forms/decorated_form_field.dart';
import 'package:invoiceninja_flutter/ui/app/forms/user_picker.dart';
import 'package:invoiceninja_flutter/ui/vendor/edit/vendor_edit_vm.dart';
import 'package:invoiceninja_flutter/utils/completers.dart';
import 'package:invoiceninja_flutter/utils/contacts.dart';
import 'package:invoiceninja_flutter/utils/localization.dart';

class VendorEditDetails extends StatefulWidget {
  const VendorEditDetails({
    Key? key,
    required this.viewModel,
  }) : super(key: key);

  final VendorEditVM viewModel;

  @override
  VendorEditDetailsState createState() => VendorEditDetailsState();
}

class VendorEditDetailsState extends State<VendorEditDetails> {
  final _numberController = TextEditingController();
  final _nameController = TextEditingController();
  final _idNumberController = TextEditingController();
  final _vatNumberController = TextEditingController();
  final _websiteController = TextEditingController();
  final _phoneController = TextEditingController();
  final _custom1Controller = TextEditingController();
  final _custom2Controller = TextEditingController();
  final _custom3Controller = TextEditingController();
  final _custom4Controller = TextEditingController();

  static final GlobalKey<FormState> _formKey =
      GlobalKey<FormState>(debugLabel: '_vendorEditDetails');
  final _debouncer = Debouncer();
  late List<TextEditingController> _controllers;

  @override
  void didChangeDependencies() {
    _controllers = [
      _numberController,
      _nameController,
      _idNumberController,
      _vatNumberController,
      _websiteController,
      _phoneController,
      _custom1Controller,
      _custom2Controller,
      _custom3Controller,
      _custom4Controller,
    ];

    _controllers
        .forEach((dynamic controller) => controller.removeListener(_onChanged));

    final vendor = widget.viewModel.vendor;
    _numberController.text = vendor.number;
    _nameController.text = vendor.name;
    _idNumberController.text = vendor.idNumber;
    _vatNumberController.text = vendor.vatNumber;
    _websiteController.text = vendor.website;
    _phoneController.text = vendor.phone;
    _custom1Controller.text = vendor.customValue1;
    _custom2Controller.text = vendor.customValue2;
    _custom3Controller.text = vendor.customValue3;
    _custom4Controller.text = vendor.customValue4;

    _controllers
        .forEach((dynamic controller) => controller.addListener(_onChanged));

    super.didChangeDependencies();
  }

  @override
  void dispose() {
    _controllers.forEach((dynamic controller) {
      controller.removeListener(_onChanged);
      controller.dispose();
    });

    super.dispose();
  }

  void _onChanged() {
    final viewModel = widget.viewModel;
    final vendor = viewModel.vendor.rebuild((b) => b
      ..number = _numberController.text.trim()
      ..name = _nameController.text.trim()
      ..idNumber = _idNumberController.text.trim()
      ..vatNumber = _vatNumberController.text.trim()
      ..website = _websiteController.text.trim()
      ..phone = _phoneController.text.trim()
      ..customValue1 = _custom1Controller.text.trim()
      ..customValue2 = _custom2Controller.text.trim()
      ..customValue3 = _custom3Controller.text.trim()
      ..customValue4 = _custom4Controller.text.trim());
    if (vendor != viewModel.vendor) {
      _debouncer.run(() {
        viewModel.onChanged(vendor);
      });
    }
  }

  void _setContactControllers(Contact contact) {
    final viewModel = widget.viewModel;
    final vendor = viewModel.vendor;

    final contactEmail =
        contact.emails!.isNotEmpty ? contact.emails!.first : null;
    final contactPhone =
        contact.phones!.isNotEmpty ? contact.phones!.first : null;
    final contactAddress = contact.postalAddresses!.isNotEmpty
        ? contact.postalAddresses!.first
        : null;

    final countryMap = viewModel.state.staticState.countryMap;
    String? countryId;

    countryMap.keys.forEach((countryId) {
      final country = countryMap[countryId] ?? CountryEntity();
      if (country.name.toLowerCase() ==
          contactAddress?.country?.toLowerCase()) {
        countryId = country.id;
      }
    });

    widget.viewModel.onChanged(vendor.rebuild((b) => b
      ..name = (contact.company ?? '').trim()
      ..address1 = (contactAddress?.street ?? '').trim()
      ..city = (contactAddress?.city ?? '').trim()
      ..state = (contactAddress?.region ?? '').trim()
      ..postalCode = (contactAddress?.postcode ?? '').trim()
      ..countryId = countryId ?? ''
      ..contacts[0] = vendor.contacts[0]!.rebuild((b) => b
        ..firstName = (contact.givenName ?? '').trim()
        ..lastName = (contact.familyName ?? '').trim()
        ..email = (contactEmail?.value ?? '').trim()
        ..phone = (contactPhone?.value ?? '').trim())
      ..updatedAt = DateTime.now().millisecondsSinceEpoch));
  }

  void _onSavePressed(BuildContext context) {
    final bool isValid = _formKey.currentState!.validate();

    if (!isValid) {
      return;
    }

    widget.viewModel.onSavePressed(context);
  }

  @override
  Widget build(BuildContext context) {
    final localization = AppLocalization.of(context)!;
    final viewModel = widget.viewModel;
    final vendor = viewModel.vendor;
    final state = viewModel.state;
    final isFullscreen = state.prefState.isEditorFullScreen(EntityType.vendor);

    return Form(
      key: _formKey,
      child: FormCard(
        isLast: true,
        padding: isFullscreen
            ? const EdgeInsets.only(
                left: kMobileDialogPadding,
                top: kMobileDialogPadding,
                right: kMobileDialogPadding / 2,
              )
            : null,
        children: <Widget>[
          DecoratedFormField(
            autofocus: true,
            controller: _nameController,
            validator: (String val) => val.trim().isEmpty
                ? AppLocalization.of(context)!.pleaseEnterAName
                : null,
            onSavePressed: _onSavePressed,
            label: localization.name,
            keyboardType: TextInputType.text,
            decoration: !kIsWeb && (Platform.isIOS || Platform.isAndroid)
                ? InputDecoration(
                    labelText: localization.name,
                    suffixIcon: IconButton(
                        alignment: Alignment.bottomCenter,
                        color: Theme.of(context).cardColor,
                        icon: Icon(
                          Icons.person,
                          color: Colors.grey,
                        ),
                        onPressed: () async {
                          final contact = await getDeviceContact();
                          if (contact != null) {
                            setState(() {
                              _setContactControllers(contact);
                            });
                          }
                        }),
                  )
                : null,
          ),
          if (vendor.isOld)
            DecoratedFormField(
              label: localization.number,
              controller: _numberController,
              onSavePressed: _onSavePressed,
              keyboardType: TextInputType.text,
            ),
          UserPicker(
            userId: vendor.assignedUserId,
            onChanged: (userId) => viewModel
                .onChanged(vendor.rebuild((b) => b..assignedUserId = userId)),
          ),
          DecoratedFormField(
            controller: _idNumberController,
            label: localization.idNumber,
            onSavePressed: _onSavePressed,
            keyboardType: TextInputType.text,
          ),
          DecoratedFormField(
            controller: _vatNumberController,
            label: localization.vatNumber,
            onSavePressed: _onSavePressed,
            keyboardType: TextInputType.text,
          ),
          DecoratedFormField(
            controller: _websiteController,
            label: localization.website,
            keyboardType: TextInputType.url,
            onSavePressed: _onSavePressed,
          ),
          DecoratedFormField(
            controller: _phoneController,
            label: localization.phone,
            keyboardType: TextInputType.phone,
            onSavePressed: _onSavePressed,
          ),
          CustomField(
            controller: _custom1Controller,
            field: CustomFieldType.vendor1,
            value: vendor.customValue1,
            onSavePressed: _onSavePressed,
          ),
          CustomField(
            controller: _custom2Controller,
            field: CustomFieldType.vendor2,
            value: vendor.customValue2,
            onSavePressed: _onSavePressed,
          ),
          CustomField(
            controller: _custom3Controller,
            field: CustomFieldType.vendor3,
            value: vendor.customValue3,
            onSavePressed: _onSavePressed,
          ),
          CustomField(
            controller: _custom4Controller,
            field: CustomFieldType.vendor4,
            value: vendor.customValue4,
            onSavePressed: _onSavePressed,
          ),
          if (state.company!.calculateTaxes)
            AppDropdownButton<String>(
              labelText: localization.classification,
              showBlank: true,
              value: vendor.classification,
              onChanged: (dynamic value) {
                viewModel.onChanged(
                    vendor.rebuild((b) => b..classification = value));
              },
              items: kTaxClassifications
                  .map((classification) => DropdownMenuItem(
                        child: Text(localization.lookup(classification)!),
                        value: classification,
                      ))
                  .toList(),
            ),
        ],
      ),
    );
  }
}