import 'package:awesome_extensions/awesome_extensions.dart';
import 'package:fast_immutable_collections/fast_immutable_collections.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_translate/flutter_translate.dart';
import 'package:searchable_listview/searchable_listview.dart';
import 'package:veilid_support/veilid_support.dart';

import '../../contact_invitation/contact_invitation.dart';
import '../../proto/proto.dart' as proto;
import '../../theme/theme.dart';
import '../cubits/cubits.dart';
import 'contact_item_widget.dart';
import 'empty_contact_list_widget.dart';

enum ContactsBrowserElementKind {
  contact,
  invitation,
}

class ContactsBrowserElement {
  ContactsBrowserElement.contact(proto.Contact c)
      : kind = ContactsBrowserElementKind.contact,
        invitation = null,
        contact = c;
  ContactsBrowserElement.invitation(proto.ContactInvitationRecord i)
      : kind = ContactsBrowserElementKind.invitation,
        contact = null,
        invitation = i;

  String get sortKey => switch (kind) {
        ContactsBrowserElementKind.contact => contact!.displayName,
        ContactsBrowserElementKind.invitation =>
          invitation!.recipient + invitation!.message
      };

  final ContactsBrowserElementKind kind;
  final proto.ContactInvitationRecord? invitation;
  final proto.Contact? contact;
}

class ContactsBrowser extends StatefulWidget {
  const ContactsBrowser(
      {required this.onContactSelected,
      required this.onContactDeleted,
      required this.onStartChat,
      this.selectedContactRecordKey,
      super.key});
  @override
  State<ContactsBrowser> createState() => _ContactsBrowserState();

  final Future<void> Function(proto.Contact? contact) onContactSelected;
  final Future<void> Function(proto.Contact contact) onContactDeleted;
  final Future<void> Function(proto.Contact contact) onStartChat;
  final TypedKey? selectedContactRecordKey;

  @override
  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
    super.debugFillProperties(properties);
    properties
      ..add(DiagnosticsProperty<TypedKey?>(
          'selectedContactRecordKey', selectedContactRecordKey))
      ..add(
          ObjectFlagProperty<Future<void> Function(proto.Contact? contact)>.has(
              'onContactSelected', onContactSelected))
      ..add(
          ObjectFlagProperty<Future<void> Function(proto.Contact contact)>.has(
              'onStartChat', onStartChat))
      ..add(
          ObjectFlagProperty<Future<void> Function(proto.Contact contact)>.has(
              'onContactDeleted', onContactDeleted));
  }
}

class _ContactsBrowserState extends State<ContactsBrowser>
    with SingleTickerProviderStateMixin {
  Widget buildInvitationButton(BuildContext context) {
    final theme = Theme.of(context);
    final scaleScheme = theme.extension<ScaleScheme>()!;
    final scaleConfig = theme.extension<ScaleConfig>()!;

    final menuIconColor = scaleConfig.preferBorders
        ? scaleScheme.primaryScale.hoverBorder
        : scaleScheme.primaryScale.hoverBorder;
    // final menuBackgroundColor = scaleConfig.preferBorders
    //     ? scaleScheme.primaryScale.activeElementBackground
    //     : scaleScheme.primaryScale.activeElementBackground;

    // final menuBorderColor = scaleScheme.primaryScale.hoverBorder;

    PopupMenuEntry<void> makeMenuButton(
            {required IconData iconData,
            required String text,
            void Function()? onTap}) =>
        PopupMenuItem(
            onTap: onTap,
            child: Row(
                spacing: 8.scaled(context),
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: [
                  Icon(iconData, size: 32.scaled(context)),
                  Text(
                    text,
                    textScaler: MediaQuery.of(context).textScaler,
                    maxLines: 2,
                    textAlign: TextAlign.center,
                  )
                ]));
    final inviteMenuItems = [
      makeMenuButton(
          iconData: Icons.contact_page,
          text: translate('add_contact_sheet.create_invite'),
          onTap: () async {
            await CreateInvitationDialog.show(context);
          }),
      makeMenuButton(
          iconData: Icons.qr_code_scanner,
          text: translate('add_contact_sheet.scan_invite'),
          onTap: () async {
            await ScanInvitationDialog.show(context);
          }),
      makeMenuButton(
          iconData: Icons.paste,
          text: translate('add_contact_sheet.paste_invite'),
          onTap: () async {
            await PasteInvitationDialog.show(context);
          }),
    ];

    return PopupMenuButton(
        itemBuilder: (_) => inviteMenuItems,
        menuPadding: const EdgeInsets.symmetric(vertical: 8).scaled(context),
        tooltip: translate('add_contact_sheet.add_contact'),
        child: Icon(
            size: 32.scaled(context), Icons.person_add, color: menuIconColor));
  }

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final scale = theme.extension<ScaleScheme>()!;

    final cilState = context.watch<ContactInvitationListCubit>().state;
    final contactInvitationRecordList =
        cilState.state.asData?.value.map((x) => x.value).toIList() ??
            const IListConst([]);

    final ciState = context.watch<ContactListCubit>().state;
    final contactList =
        ciState.state.asData?.value.map((x) => x.value).toIList();

    final initialList = <ContactsBrowserElement>[];
    if (contactList != null) {
      initialList
          .addAll(contactList.toList().map(ContactsBrowserElement.contact));
    }
    if (contactInvitationRecordList.isNotEmpty) {
      initialList.addAll(contactInvitationRecordList
          .toList()
          .map(ContactsBrowserElement.invitation));
    }

    initialList.sort((a, b) => a.sortKey.compareTo(b.sortKey));

    return Column(children: [
      SearchableList<ContactsBrowserElement>(
              initialList: initialList,
              itemBuilder: (element) {
                switch (element.kind) {
                  case ContactsBrowserElementKind.contact:
                    final contact = element.contact!;
                    return ContactItemWidget(
                            contact: contact,
                            selected: widget.selectedContactRecordKey ==
                                contact.localConversationRecordKey.toVeilid(),
                            disabled: false,
                            onDoubleTap: _onStartChat,
                            onTap: onContactSelected,
                            onDelete: _onContactDeleted)
                        .paddingLTRB(0, 4.scaled(context), 0, 0);
                  case ContactsBrowserElementKind.invitation:
                    final invitation = element.invitation!;
                    return ContactInvitationItemWidget(
                            contactInvitationRecord: invitation,
                            disabled: false)
                        .paddingLTRB(0, 4.scaled(context), 0, 0);
                }
              },
              filter: (value) {
                final lowerValue = value.toLowerCase();

                final filtered = <ContactsBrowserElement>[];
                for (final element in initialList) {
                  switch (element.kind) {
                    case ContactsBrowserElementKind.contact:
                      final contact = element.contact!;
                      if (contact.nickname.toLowerCase().contains(lowerValue) ||
                          contact.profile.name
                              .toLowerCase()
                              .contains(lowerValue) ||
                          contact.profile.pronouns
                              .toLowerCase()
                              .contains(lowerValue)) {
                        filtered.add(element);
                      }
                    case ContactsBrowserElementKind.invitation:
                      final invitation = element.invitation!;
                      if (invitation.message
                              .toLowerCase()
                              .contains(lowerValue) ||
                          invitation.recipient
                              .toLowerCase()
                              .contains(lowerValue)) {
                        filtered.add(element);
                      }
                  }
                }
                return filtered;
              },
              searchFieldHeight: 40.scaled(context),
              listViewPadding:
                  const EdgeInsets.fromLTRB(4, 0, 4, 4).scaled(context),
              searchFieldPadding:
                  const EdgeInsets.fromLTRB(4, 8, 4, 4).scaled(context),
              emptyWidget: contactList == null
                  ? waitingPage(
                      text: translate('contact_list.loading_contacts'))
                  : const EmptyContactListWidget(),
              defaultSuffixIconColor: scale.primaryScale.border,
              searchFieldEnabled: contactList != null,
              inputDecoration:
                  InputDecoration(labelText: translate('contact_list.search')),
              secondaryWidget: buildInvitationButton(context)
                  .paddingLTRB(8.scaled(context), 0, 0, 0))
          .expanded()
    ]);
  }

  Future<void> onContactSelected(proto.Contact contact) async {
    await widget.onContactSelected(contact);
  }

  Future<void> _onStartChat(proto.Contact contact) async {
    await widget.onStartChat(contact);
  }

  Future<void> _onContactDeleted(proto.Contact contact) async {
    await widget.onContactDeleted(contact);
  }

  ////////////////////////////////////////////////////////////////////////////
}