import 'package:get/get.dart';
import 'package:loopin/IM/im_message.dart';
import 'package:loopin/IM/im_service.dart';
import 'package:loopin/utils/index.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_message.dart';

class ChatDetailController extends GetxController {
  final String userID;

  ChatDetailController({required this.userID});

  final RxList<V2TimMessage> chatList = <V2TimMessage>[].obs;

  void updateChatListWithTimeLabels(List<V2TimMessage> originMessages) async {
    final idRes = await ImService.instance.selfUserId();
    if (idRes.success) {
      final selfUserId = idRes.data;
      List<V2TimMessage> displayMessages = [];

      for (int i = 0; i < originMessages.length; i++) {
        final current = originMessages[i];
        final currentTimestamp = current.timestamp ?? 0;

        // 判断是否需要给当前这条消息加时间标签
        bool needInsertLabel = false;

        if (i == originMessages.length - 1) {
          // 最后一条消息，加时间标签
          needInsertLabel = true;
        } else {
          final next = originMessages[i + 1];
          final nextTimestamp = next.timestamp ?? 0;
          final diff = currentTimestamp - nextTimestamp;

          if (diff > 180) {
            needInsertLabel = true;
          }
        }

        // 把当前消息先插入后插入标签
        displayMessages.add(current);

        if (needInsertLabel) {
          final labelTime = Utils().formatChatTime(currentTimestamp);
          final timeLabel = await IMMessage().insertTimeLabel(labelTime, selfUserId);
          displayMessages.add(timeLabel.data);
        }
      }

      chatList.addAll(displayMessages);
    }
  }
}