tm_app/lib/views/notification/pages/m_notification_page.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:tm_app/core/theme/colors.dart';
import 'package:tm_app/core/utils/size_config.dart';
import 'package:tm_app/view_models/notification_view_model.dart';
import 'package:tm_app/views/notification/strings/notification_strings.dart';
import 'package:tm_app/views/shared/tender_app_bar.dart';

import '../../shared/main_tab_bar.dart';
import '../widgets/notification_all_tab.dart';
import '../widgets/notification_important_tab.dart';
import '../widgets/notification_unread_tab.dart';

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

  @override
  State<MobileNotificationPage> createState() => _MobileNotificationPageState();
}

class _MobileNotificationPageState extends State<MobileNotificationPage>
    with SingleTickerProviderStateMixin {
  late TabController controller;

  final ScrollController _scrollAll = ScrollController();
  final ScrollController _scrollUnread = ScrollController();
  final ScrollController _scrollImportant = ScrollController();

  @override
  void initState() {
    super.initState();
    controller = TabController(length: 3, vsync: this);

    final viewModel = context.read<NotificationViewModel>();

    _scrollAll.addListener(() {
      if (_scrollAll.position.pixels >=
              _scrollAll.position.maxScrollExtent - 100 &&
          !viewModel.isLoadingAll &&
          viewModel.hasMoreAll) {
        viewModel.getNotifications(
          page: viewModel.currentPageAll + 1,
          isPagination: true,
        );
      }
    });

    _scrollUnread.addListener(() {
      if (_scrollUnread.position.pixels >=
              _scrollUnread.position.maxScrollExtent - 100 &&
          !viewModel.isLoadingUnread &&
          viewModel.hasMoreUnread) {
        viewModel.getUnreadNotifications(
          page: viewModel.currentPageUnread + 1,
          isPagination: true,
        );
      }
    });

    _scrollImportant.addListener(() {
      if (_scrollImportant.position.pixels >=
              _scrollImportant.position.maxScrollExtent - 100 &&
          !viewModel.isLoadingImportant &&
          viewModel.hasMoreImportant) {
        viewModel.getImportantNotifications(
          page: viewModel.currentPageImportant + 1,
          isPagination: true,
        );
      }
    });
  }

  @override
  void dispose() {
    controller.dispose();
    _scrollAll.dispose();
    _scrollUnread.dispose();
    _scrollImportant.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final viewModel = context.watch<NotificationViewModel>();

    return Scaffold(
      backgroundColor: AppColors.backgroundColor,
      appBar: tenderMobileAppBar(title: NotificationStrings.notificationTitle),
      body: Column(
        children: [
          MainTabBar(
            controller: controller,
            titles: [
              NotificationStrings.all,
              NotificationStrings.unread,
              NotificationStrings.important,
            ],
          ),
          SizedBox(height: 12.0.h()),
          Expanded(
            child: TabBarView(
              controller: controller,
              children: [
                NotificationAllTab(scrollController: _scrollAll),
                NotificationUnreadTab(scrollController: _scrollUnread),
                NotificationImportantTab(scrollController: _scrollImportant),
              ],
            ),
          ),

          if (viewModel.isMoreLoadingAll)
            const Padding(
              padding: EdgeInsets.symmetric(vertical: 16),
              child: Center(
                child: CircularProgressIndicator(color: AppColors.cyanTeal),
              ),
            ),

          if (viewModel.isMoreLoadingUnread)
            const Padding(
              padding: EdgeInsets.symmetric(vertical: 16),
              child: Center(
                child: CircularProgressIndicator(color: AppColors.cyanTeal),
              ),
            ),

          if (viewModel.isMoreLoadingImportant)
            const Padding(
              padding: EdgeInsets.symmetric(vertical: 16),
              child: Center(
                child: CircularProgressIndicator(color: AppColors.cyanTeal),
              ),
            ),
        ],
      ),
    );
  }
}