import 'package:async_tools/async_tools.dart';
import 'package:awesome_extensions/awesome_extensions.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';
import 'package:flutter_translate/flutter_translate.dart';

import '../../proto/proto.dart' as proto;
import '../../theme/theme.dart';
import '../models/contact_spec.dart';
import 'availability_widget.dart';

const _kDoSubmitEditContact = 'doSubmitEditContact';

class EditContactForm extends StatefulWidget {
  const EditContactForm({
    required this.contact,
    required this.onSubmit,
    required this.submitText,
    required this.submitDisabledText,
    this.onModifiedState,
    super.key,
  });

  @override
  State createState() => _EditContactFormState();

  final proto.Contact contact;
  final String submitText;
  final String submitDisabledText;
  final Future<bool> Function(ContactSpec) onSubmit;
  final void Function(bool)? onModifiedState;

  @override
  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
    super.debugFillProperties(properties);
    properties
      ..add(ObjectFlagProperty<Future<bool> Function(ContactSpec p1)>.has(
          'onSubmit', onSubmit))
      ..add(ObjectFlagProperty<void Function(bool p1)?>.has(
          'onModifiedState', onModifiedState))
      ..add(DiagnosticsProperty<proto.Contact>('contact', contact))
      ..add(StringProperty('submitText', submitText))
      ..add(StringProperty('submitDisabledText', submitDisabledText));
  }

  static const String formFieldNickname = 'nickname';
  static const String formFieldNotes = 'notes';
  static const String formFieldShowAvailability = 'show_availability';
}

class _EditContactFormState extends State<EditContactForm> {
  final _formKey = GlobalKey<FormBuilderState>();

  @override
  void initState() {
    _savedValue = ContactSpec.fromProto(widget.contact);
    _currentValueNickname = _savedValue.nickname;

    super.initState();
  }

  ContactSpec _makeContactSpec() {
    final nickname = _formKey.currentState!
        .fields[EditContactForm.formFieldNickname]!.value as String;
    final notes = _formKey
        .currentState!.fields[EditContactForm.formFieldNotes]!.value as String;
    final showAvailability = _formKey.currentState!
        .fields[EditContactForm.formFieldShowAvailability]!.value as bool;

    return ContactSpec(
        nickname: nickname, notes: notes, showAvailability: showAvailability);
  }

  // Check if everything is the same and update state
  void _onChanged() {
    final currentValue = _makeContactSpec();
    _isModified = currentValue != _savedValue;
    final onModifiedState = widget.onModifiedState;
    if (onModifiedState != null) {
      onModifiedState(_isModified);
    }
  }

  Widget _availabilityWidget(proto.Availability availability, Color color) =>
      AvailabilityWidget(
        availability: availability,
        color: color,
        vertical: false,
      );

  Widget _editContactForm(BuildContext context) {
    final theme = Theme.of(context);
    final scale = theme.extension<ScaleScheme>()!;
    final scaleConfig = theme.extension<ScaleConfig>()!;
    final textTheme = theme.textTheme;

    late final Color border;
    if (scaleConfig.useVisualIndicators && !scaleConfig.preferBorders) {
      border = scale.primaryScale.elementBackground;
    } else {
      border = scale.primaryScale.subtleBorder;
    }

    return FormBuilder(
      key: _formKey,
      autovalidateMode: AutovalidateMode.onUserInteraction,
      onChanged: _onChanged,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          styledCard(
                  context: context,
                  child: Column(
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        Row(children: [
                          const Spacer(),
                          AvatarWidget(
                            name: _currentValueNickname.isNotEmpty
                                ? _currentValueNickname
                                : widget.contact.profile.name,
                            size: 128,
                            borderColor: border,
                            foregroundColor: scale.primaryScale.primaryText,
                            backgroundColor: scale.primaryScale.primary,
                            scaleConfig: scaleConfig,
                            textStyle: theme.textTheme.titleLarge!
                                .copyWith(fontSize: 64),
                          ).paddingLTRB(0, 0, 0, 16),
                          const Spacer()
                        ]),
                        SelectableText(widget.contact.profile.name,
                                style: textTheme.bodyLarge)
                            .noEditDecoratorLabel(
                              context,
                              translate('contact_form.form_name'),
                            )
                            .paddingSymmetric(vertical: 4),
                        SelectableText(widget.contact.profile.pronouns,
                                style: textTheme.bodyLarge)
                            .noEditDecoratorLabel(
                              context,
                              translate('contact_form.form_pronouns'),
                            )
                            .paddingSymmetric(vertical: 4),
                        Row(mainAxisSize: MainAxisSize.min, children: [
                          _availabilityWidget(
                              widget.contact.profile.availability,
                              scale.primaryScale.appText),
                          SelectableText(widget.contact.profile.status,
                                  style: textTheme.bodyMedium)
                              .paddingSymmetric(horizontal: 8)
                        ])
                            .noEditDecoratorLabel(
                              context,
                              translate('contact_form.form_status'),
                            )
                            .paddingSymmetric(vertical: 4),
                        SelectableText(widget.contact.profile.about,
                                minLines: 1,
                                maxLines: 8,
                                style: textTheme.bodyMedium)
                            .noEditDecoratorLabel(
                              context,
                              translate('contact_form.form_about'),
                            )
                            .paddingSymmetric(vertical: 4),
                        SelectableText(
                                widget.contact.identityPublicKey.value
                                    .toVeilid()
                                    .toString(),
                                style: textTheme.bodyMedium!
                                    .copyWith(fontFamily: 'Source Code Pro'))
                            .noEditDecoratorLabel(
                              context,
                              translate('contact_form.form_fingerprint'),
                            )
                            .paddingSymmetric(vertical: 4),
                      ]).paddingAll(16))
              .paddingLTRB(0, 0, 0, 16),
          FormBuilderTextField(
            name: EditContactForm.formFieldNickname,
            initialValue: _currentValueNickname,
            onChanged: (x) {
              setState(() {
                _currentValueNickname = x ?? '';
              });
            },
            decoration: InputDecoration(
                labelText: translate('contact_form.form_nickname')),
            maxLength: 64,
            textInputAction: TextInputAction.next,
          ),
          FormBuilderCheckbox(
            name: EditContactForm.formFieldShowAvailability,
            initialValue: _savedValue.showAvailability,
            side: BorderSide(color: scale.primaryScale.border, width: 2),
            checkColor: scale.primaryScale.borderText,
            activeColor: scale.primaryScale.border,
            title: Text(translate('contact_form.form_show_availability'),
                style: textTheme.labelMedium),
          ),
          FormBuilderTextField(
            name: EditContactForm.formFieldNotes,
            initialValue: _savedValue.notes,
            minLines: 1,
            maxLines: 8,
            maxLength: 1024,
            decoration: InputDecoration(
                labelText: translate('contact_form.form_notes')),
            textInputAction: TextInputAction.newline,
          ),
          ElevatedButton(
            onPressed: _isModified ? _doSubmit : null,
            child: Row(mainAxisSize: MainAxisSize.min, children: [
              const Icon(Icons.check, size: 16).paddingLTRB(0, 0, 4, 0),
              Text(widget.submitText).paddingLTRB(0, 0, 4, 0)
            ]),
          ).paddingSymmetric(vertical: 4).alignAtCenter(),
        ],
      ),
    );
  }

  void _doSubmit() {
    final onSubmit = widget.onSubmit;
    if (_formKey.currentState?.saveAndValidate() ?? false) {
      singleFuture((this, _kDoSubmitEditContact), () async {
        final updatedContactSpec = _makeContactSpec();
        final saved = await onSubmit(updatedContactSpec);
        if (saved) {
          setState(() {
            _savedValue = updatedContactSpec;
          });
          _onChanged();
        }
      });
    }
  }

  @override
  Widget build(BuildContext context) => _editContactForm(context);

  ///////////////////////////////////////////////////////////////////////////
  late ContactSpec _savedValue;
  late String _currentValueNickname;
  bool _isModified = false;
}