ftc_patient_app/lib/view/screens/chat/chat_screen.dart

import 'package:flutter/material.dart';
import 'package:ftc_mobile_app/ftc_mobile_app.dart';
import 'package:ftc_mobile_app/models/chat/ChatModel.dart';
import 'package:ftc_mobile_app/utilities/extensions/custom_extensions.dart';
import 'package:ftc_mobile_app/view/custom_widgets/my_circle_image.dart';
import 'package:get/get.dart';
import 'package:grouped_list/grouped_list.dart';
import 'package:intl/intl.dart';
import 'arguments/chat_screen_args.dart';
import 'widgets/chat_screen_footer_widget.dart';
import 'widgets/message_bubble.dart';

class ChatScreen extends StatefulWidget {
  final ChatScreenArgs args;

  const ChatScreen({Key? key, required this.args}) : super(key: key);

  @override
  State<ChatScreen> createState() => _ChatScreenState();
}

class _ChatScreenState extends State<ChatScreen> {
  late final ChatScreenController controller;
  final sepFormatter = DateFormat("dd MMM yyyy");

  @override
  void initState() {
    controller = Get.put(ChatScreenController(widget.args));
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return CustomScaffold(
      backgroundColor: Colors.white,
      screenKey: controller.screenKey,
      onScreenTap: controller.removeFocus,
      showAppBar: true,
      appBar: _appBar,
      body: SafeArea(
        child: Column(
          children: [
            Expanded(child: messagesList()),
            Obx(() {
              return controller.isSocketConnected()
                  ? ChatScreenFooterWidget(
                      controller: controller,
                      enabled: controller.isSocketConnected(),
                    )
                  : FrequentFunctions.noWidget;
            })
          ],
        ),
      ),
    );
  }

  AppBar get _appBar {
    return AppBar(
      toolbarHeight: 56.r,
      leading: IconButton(
        icon: CustomImageWidget(
          imagePath: AssetsManager.kBackIcon,
          height: 11.53.h,
          width: 8.66.w,
        ),
        onPressed: () {
          Navigator.pop(context);
        },
      ),
      centerTitle: false,
      titleSpacing: 0,
      leadingWidth: 50.r,
      surfaceTintColor: Colors.white,
      title: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          MyCircleImage(
            imageSize: 32.r,
            url: "${WebUrls.baseUrl}${widget.args.profilePicPath}",
            errorWidget: CustomImageWidget(
              imagePath: AssetsManager.kPersonMainIcon,
              imageColor: CustomAppColors.kDarkBlueTextColor,
              height: 32.r,
              width: 32.r,
            ),
          ),
          10.horizontalSpace,
          CustomTextWidget(
            text: widget.args.name,
            isExpanded: false,
            fontSize: 16.sp,
            fontWeight: FontWeight.w700,
            fontColor: CustomAppColors.kDarkBlueTextColor,
          ),
        ],
      ),
    );
  }

  Widget messagesList() {
    return Obx(() {
      final messages = controller.messages;
      return (messages.isEmpty)
          ? FrequentFunctions.noWidget
          : _messagesList(messages());
    });
  }

  Widget _messagesList(List<ChatModel> list) {
    final now = DateTime.now();

    return GroupedListView<ChatModel, String>(
      reverse: true,
      elements: list,
      padding: REdgeInsets.symmetric(horizontal: 18),
      order: GroupedListOrder.DESC,
      groupBy: (message) {
        final messageDate =
            DateTime.fromMillisecondsSinceEpoch(message.date ?? 0);
        return DateFormatter.dateFormatter.format(messageDate);
      },
      groupSeparatorBuilder: (String date) {
        final isToday = (date == DateFormatter.dateFormatter.format(now));
        return _buildGroupSeparatorWidget(isToday
            ? "Today"
            : sepFormatter.format(DateFormatter.dateFormatter.parse(date)));
      },
      itemBuilder: (_, e) => _buildItemWidget(list.indexOf(e), e),
      sort: false,
      separator: 8.verticalSpace,
    );
  }

  Widget _buildGroupSeparatorWidget(String susTag) {
    return Padding(
      padding: REdgeInsets.symmetric(vertical: 12.0),
      child: Row(
        children: [
          Expanded(
              child: Divider(
            height: 1,
            color: Colors.grey.withOpacity(0.3),
          )),
          Text(
            susTag,
            style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.w500),
          ).addPaddingHorizontal(10),
          Expanded(
              child: Divider(
            height: 1,
            color: Colors.grey.withOpacity(0.3),
          )),
        ],
      ),
    );
  }

  Widget _buildItemWidget(int index, ChatModel message) {
    final isMyMessage = (message.from?.id == controller.myId);
    final hasFile = message.filePath.isNotNullOrEmpty();
    print("filePath: ${message.filePath}");

    return MessageBubble(
      senderName: message.from?.name ?? "",
      profilePic: !isMyMessage ? (message.from?.profilePictureUrl ?? "") : "",
      content: hasFile ? (message.filePath ?? '') : (message.message ?? ''),
      type: isMyMessage ? MessageType.sent : MessageType.received,
      contentType: hasFile
          ? (message.fileType == ChatModel.fileTypeLocalPath)
              ? MessageContentType.file
              : MessageContentType.url
          : MessageContentType.text,
      sentMessageColor: CustomAppColors.kSmokeColor,
      receivedMessageColor: CustomAppColors.kSecondaryColor,
      messageTime: (message.date == null)
          ? ""
          : DateTime.fromMillisecondsSinceEpoch(message.date!)
              .toIso8601String(),
      state: MessageState.stateNone,
      status: MessageSeenStatus.seen,
    );
  }

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