import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:goatagent/auth.dart';

class NotificationScreen extends StatefulWidget {
  const NotificationScreen({super.key});

  @override
  State<NotificationScreen> createState() => _NotificationScreenState();
}

class _NotificationScreenState extends State<NotificationScreen> {
  final notificationEndpoint = Uri.parse(
      'https://id.smartsheep.studio/api/notifications?skip=0&take=20');

  List<dynamic> notifications = List.empty();

  @override
  void initState() {
    super.initState();
    _pullNotifications();
  }

  Future<void> _pullNotifications() async {
    if (await AuthGuard().isAuthorized()) {
      await AuthGuard().pullProfiles();
      var profiles = await AuthGuard().readProfiles();
      setState(() {
        notifications = profiles['notifications'];
      });
    }
  }

  Future<void> _markAsRead(element) async {
    if (AuthGuard().client != null) {
      var id = element['id'];
      var uri =
          Uri.parse('https://id.smartsheep.studio/api/notifications/$id/read');
      await AuthGuard().client!.put(uri);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Padding(
          padding: const EdgeInsets.only(left: 20, right: 20, top: 30),
          child: RefreshIndicator(
            onRefresh: _pullNotifications,
            child: CustomScrollView(
              slivers: [
                notifications.isEmpty
                    ? const SliverToBoxAdapter(
                        child: Card(
                          child: Padding(
                            padding: EdgeInsets.all(10),
                            child: ListTile(
                              leading: Icon(Icons.check),
                              title: Text('You\'re done!'),
                              subtitle: Text(
                                  'There are no notifications unread for you.'),
                            ),
                          ),
                        ),
                      )
                    : SliverList.builder(
                        itemCount: notifications.length,
                        itemBuilder: (BuildContext context, int index) {
                          var element = notifications[index];
                          return Dismissible(
                              key: Key('notification-$index'),
                              onDismissed: (direction) {
                                var subject = element["subject"];
                                _markAsRead(element).then((value) {
                                  ScaffoldMessenger.of(context).showSnackBar(
                                      SnackBar(
                                          content:
                                              Text('「$subject」 mark as read')));
                                });
                              },
                              child: ListTile(
                                title: Text(element["subject"]),
                                subtitle: Text(element["content"]),
                              ));
                        },
                      ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}