eatvio_app/lib/presentation/chat/chat_screen/chat_screen.dart

import 'bloc/chat_bloc.dart';
import 'models/chat_model.dart';
import 'package:eatvio_app/core/app_export.dart';
import 'package:flutter/material.dart';
import 'package:eatvio_app/widgets/app_bar/custom_app_bar.dart';
import 'package:eatvio_app/widgets/app_bar/appbar_subtitle.dart';
import 'package:eatvio_app/widgets/app_bar/appbar_leading_image.dart';
import 'package:eatvio_app/widgets/app_bar/appbar_title_image.dart';
import 'package:eatvio_app/widgets/custom_bottom_bar.dart';
import 'package:eatvio_app/widgets/custom_text_form_field.dart';

class ChatScreen extends StatelessWidget {
  const ChatScreen({Key? key}) : super(key: key);
  static Widget builder(BuildContext context) {
    final chatID = ModalRoute.of(context)!.settings.arguments;
    return BlocProvider<ChatBloc>(
        create: (context) => ChatBloc(
            ChatState(chatModelObj: ChatModel(chatID: chatID.toString())))
          ..add(ChatInitialEvent()),
        child: ChatScreen());
  }

  Widget build(BuildContext context) {
    return BlocBuilder<ChatBloc, ChatState>(
      builder: (context, state) {
        if (state is ChatInitialState) {
          // Это начальное состояние, данные ещё не загружены.
          return Container(
            color: Colors.white,
          );
        } else if (state is ChatLoadedState) {
          // Данные загружены, можно строить экран.
          return _buildChat(context, state);
        } else if (state is ChatErrorState) {
          // Произошла ошибка при загрузке данных.
          return Center(child: Text(state.errorMessage));
        } else {
          // Другие состояния, если они есть.
          return Container(); // Пустой контейнер для необработанных состояний.
        }
      },
    );
  }

  _buildChat(BuildContext context, ChatLoadedState state) {
    mediaQueryData = MediaQuery.of(context);
    return Scaffold(
      resizeToAvoidBottomInset: false,
      appBar: _buildAppbar(context),
      body: SizedBox(
        width: double.maxFinite,
        child: Container(
          width: double.maxFinite,
          decoration: AppDecoration.fillGray,
          child: ListView(
            children: [
              SizedBox(height: 30.v),
            ],
          ),
        ),
      ),
      bottomNavigationBar: _buildTextField(context),
    );
  }

  /// Section Widget
  _buildAppbar(BuildContext context) {
    return CustomAppBar(
      leadingWidth: 26.h,
      leading: AppbarLeadingImage(
        imagePath: ImageConstant.imgArrowLeft,
        margin: EdgeInsets.only(
          left: 16.h,
          top: 18.v,
          bottom: 25.v,
        ),
        onTap: () => onTapArrowleftone(context),
      ),
      title: Padding(
        padding: EdgeInsets.only(left: 12.h),
        child: Row(
          children: [
            AppbarTitleImage(
              imagePath: ImageConstant.imgIconMoreHorizontal,
              margin: EdgeInsets.only(bottom: 3.v),
            ),
            Padding(
              padding: EdgeInsets.only(
                left: 12.h,
                top: 2.v,
              ),
              child: Column(
                children: [
                  AppbarSubtitle(
                    text: "Валерий Леонтьев",
                  ),
                  SizedBox(height: 3.v),
                  Text("Был в сети вчера", style: theme.textTheme.bodySmall!)
                ],
              ),
            )
          ],
        ),
      ),
    );
  }

  /// Section Widget
  _buildTextField(BuildContext context) {
    return Container(
      width: double.maxFinite,
      padding: EdgeInsets.symmetric(
        horizontal: 7.h,
        vertical: 6.v,
      ),
      decoration: AppDecoration.outlineBlueGray,
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          CustomImageView(
            imagePath: ImageConstant.imgAttach,
            height: 29.adaptSize,
            width: 29.adaptSize,
            margin: EdgeInsets.only(
              top: 1.v,
              bottom: 6.v,
            ),
          ),
          Expanded(
            child: Padding(
              padding: EdgeInsets.only(
                left: 4.h,
                bottom: 4.v,
              ),
              child: BlocSelector<ChatBloc, ChatState, TextEditingController?>(
                selector: (state) => TextEditingController(),
                builder: (context, messageController) {
                  return CustomTextFormField(
                    controller: messageController,
                    hintText: "Напишите сообщение...",
                    textInputAction: TextInputAction.done,
                  );
                },
              ),
            ),
          ),
          CustomImageView(
            imagePath: ImageConstant.imgMic,
            height: 24.v,
            width: 18.h,
            margin: EdgeInsets.only(
              left: 11.h,
              top: 4.v,
              bottom: 8.v,
            ),
          )
        ],
      ),
    );
  }

  /// Common widget

  ///Handling route based on bottom click actions
  String getCurrentRoute(BottomBarEnum type) {
    switch (type) {
      case BottomBarEnum.tf:
        return AppRoutes.chatScreen;
      default:
        return "/";
    }
  }

  ///Handling page based on route
  Widget getCurrentPage(
    BuildContext context,
    String currentRoute,
  ) {
    switch (currentRoute) {
      case AppRoutes.chatScreen:
        return ChatScreen.builder(context);
      default:
        return ChatScreen();
    }
  }

  /// Navigates to the previous screen.
  onTapArrowleftone(BuildContext context) {
    NavigatorService.goBack();
  }
}