import 'package:flutter/material.dart';

import 'package:adaptive_dialog/adaptive_dialog.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:future_loading_dialog/future_loading_dialog.dart';
import 'package:matrix/matrix.dart';

import 'package:fluffychat/utils/localized_exception_extension.dart';
import 'package:fluffychat/utils/matrix_sdk_extensions/client_stories_extension.dart';
import 'package:fluffychat/widgets/avatar.dart';
import 'package:fluffychat/widgets/matrix.dart';

class InviteStoryPage extends StatefulWidget {
  final Room? storiesRoom;
  const InviteStoryPage({
    required this.storiesRoom,
    Key? key,
  }) : super(key: key);

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

class InviteStoryPageState extends State<InviteStoryPage> {
  Set<String> _undecided = {};
  final Set<String> _invite = {};

  void _inviteAction() async {
    final confirmed = await showOkCancelAlertDialog(
      context: context,
      message: L10n.of(context)!.storyPrivacyWarning,
      okLabel: L10n.of(context)!.iUnderstand,
      cancelLabel: L10n.of(context)!.cancel,
    );
    if (confirmed != OkCancelResult.ok) return;
    final result = await showFutureLoadingDialog(
      context: context,
      future: () async {
        final client = Matrix.of(context).client;
        var room = await client.getStoriesRoom(context);
        final inviteList = _invite.toList();
        if (room == null) {
          room = await client.createStoriesRoom(inviteList.take(10).toList());
          if (inviteList.length > 10) {
            inviteList.removeRange(0, 10);
          } else {
            inviteList.clear();
          }
        }
        for (final userId in inviteList) {
          room.invite(userId);
        }

        _undecided.removeAll(_invite);
        _undecided.addAll(client.storiesBlockList);
        await client.setStoriesBlockList(_undecided.toList());
      },
    );
    if (result.error != null) return;
    Navigator.of(context).pop<bool>(true);
  }

  Future<List<User>>? loadContacts;

  @override
  Widget build(BuildContext context) {
    loadContacts ??= Matrix.of(context)
        .client
        .getUndecidedContactsForStories(widget.storiesRoom)
        .then((contacts) {
      return contacts;
    });
    return Scaffold(
      appBar: AppBar(
        leading: IconButton(
          icon: const Icon(Icons.close),
          onPressed: () => Navigator.of(context).pop<bool>(false),
        ),
        title: Text(L10n.of(context)!.whoCanSeeMyStories),
        elevation: 0,
      ),
      body: Column(
        children: [
          ListTile(
            title: Text(L10n.of(context)!.whoCanSeeMyStoriesDesc),
            leading: CircleAvatar(
              backgroundColor: Theme.of(context).secondaryHeaderColor,
              foregroundColor: Theme.of(context).colorScheme.secondary,
              child: const Icon(Icons.lock),
            ),
          ),
          const Divider(height: 1),
          Expanded(
            child: FutureBuilder<List<User>>(
                future: loadContacts,
                builder: (context, snapshot) {
                  final contacts = snapshot.data;
                  if (contacts == null) {
                    final error = snapshot.error;
                    if (error != null) {
                      return Center(
                          child: Text(error.toLocalizedString(context)));
                    }
                    return const Center(
                        child: CircularProgressIndicator.adaptive());
                  }
                  _undecided = contacts.map((u) => u.id).toSet();
                  return ListView.builder(
                    itemCount: contacts.length,
                    itemBuilder: (context, i) => SwitchListTile.adaptive(
                      value: _invite.contains(contacts[i].id),
                      onChanged: (b) => setState(() => b
                          ? _invite.add(contacts[i].id)
                          : _invite.remove(contacts[i].id)),
                      secondary: Avatar(
                        mxContent: contacts[i].avatarUrl,
                        name: contacts[i].calcDisplayname(),
                      ),
                      title: Text(contacts[i].calcDisplayname()),
                    ),
                  );
                }),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton.extended(
        onPressed: _inviteAction,
        label: Text(L10n.of(context)!.publish),
        backgroundColor: Theme.of(context).colorScheme.surface,
        foregroundColor: Theme.of(context).colorScheme.onSurface,
        icon: const Icon(Icons.send_rounded),
      ),
    );
  }
}