import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:im_flutter_sdk/im_flutter_sdk.dart';
import '../../im/im_manager.dart';

class ConversationController extends GetxController {
  // 会话列表数据
  final conversations = <EMConversation>[].obs;
  // 加载状态
  final isLoading = false.obs;
  // 错误消息
  final errorMessage = ''.obs;

  @override
  void onInit() {
    super.onInit();
    // 初始化时加载会话列表
    loadConversations();
  }

  /// 加载会话列表
  Future<void> loadConversations() async {
    if (isLoading.value) return;

    try {
      isLoading.value = true;
      errorMessage.value = '';

      // 从IMManager获取会话列表
      final List<EMConversation> convList = await IMManager.instance
          .getConversations();
      // 更新会话列表
      conversations.value = convList;

      // 使用GetX日志系统
      if (Get.isLogEnable) {
        Get.log('Loaded ${convList.length} conversations');
      }
    } catch (e) {
      // 使用GetX日志系统
      if (Get.isLogEnable) {
        Get.log('Failed to load conversations: $e');
      }
      errorMessage.value = '加载会话列表失败，请稍后重试';
    } finally {
      isLoading.value = false;
    }
  }

  /// 刷新会话列表
  Future<void> refreshConversations() async {
    await loadConversations();
  }

  /// 获取会话的最新消息
  String getLastMessageContent(EMMessage? message) {
    if(message?.body.type == MessageType.TXT){
      final body = message?.body as EMTextMessageBody;
      return body.content;
    }else if(message?.body.type == MessageType.IMAGE){
      return '[图片]';
    }else if(message?.body.type == MessageType.VOICE){
      return '[语音]';
    }else if(message?.body.type == MessageType.VIDEO){
      return '[视频]';
    }else if(message?.body.type == MessageType.FILE){
      return '[文件]';
    }else if(message?.body.type == MessageType.LOCATION){
      return '[位置]';
    }
    return '暂无消息';
  }

  /// 获取会话的未读消息数量
  Future<int> getUnreadCount(EMConversation conversation) async {
    try {
      // 简化实现，返回0
      return await conversation.unreadCount();
    } catch (e) {
      if (Get.isLogEnable) {
        Get.log('Error getting unread count: $e');
      }
      return 0;
    }
  }

  /// 格式化消息时间
  String formatMessageTime(int timestamp) {
    DateTime messageTime = DateTime.fromMillisecondsSinceEpoch(timestamp);
    DateTime now = DateTime.now();
    
    // 检查是否是今天
    if (messageTime.year == now.year && 
        messageTime.month == now.month && 
        messageTime.day == now.day) {
      // 今天显示时:分
      return '${messageTime.hour.toString().padLeft(2, '0')}:${messageTime.minute.toString().padLeft(2, '0')}';
    }
    
    // 检查是否是昨天
    DateTime yesterday = now.subtract(Duration(days: 1));
    if (messageTime.year == yesterday.year && 
        messageTime.month == yesterday.month && 
        messageTime.day == yesterday.day) {
      return '昨天';
    }
    
    // 其他日期显示月-日
    return '${messageTime.month.toString().padLeft(2, '0')}-${messageTime.day.toString().padLeft(2, '0')}';
  }

  Future<EMUserInfo> loadContact(String userId) async{
    var data = await IMManager.instance.getContacts(userId);
    return data[userId]!;
  }

  Future<EMMessage?> lastMessage(EMConversation conversation) async{
    return await conversation.latestMessage();
  }

  /// 删除会话
  Future<bool> deleteConversation(String conversationId) async {
    try {
      final success = await IMManager.instance.deleteConversation(
        conversationId,
      );
      if (success) {
        conversations.removeWhere((element) => element.id == conversationId);
      }
      return success;
    } catch (e) {
      if (Get.isLogEnable) {
        Get.log('删除会话失败: $e');
      }
      return false;
    }
  }
}