import {
  DyFM_Msg_Message,
  DyFM_Msg_Conversation,
  DyFM_Msg_Type,
  DyFM_Msg_Status,
} from '@futdevpro/fsm-dynamo/messaging';
import { DyNTS_Bot_MessageWrapper } from '../../bot/_models/bot-message-wrapper.interface';

/**
 * Messaging utility functions
 */
export class DyNTS_Msg_Util {
  
  /**
   * Convert bot message to messaging system message
   */
  static botMessageToMsgMessage<T>(
    botMessage: DyNTS_Bot_MessageWrapper<T>,
    conversationId: string,
    issuer: string
  ): DyFM_Msg_Message {
    return new DyFM_Msg_Message({
      conversationId,
      content: botMessage.content || '',
      type: DyFM_Msg_Type.userToUser,
      status: DyFM_Msg_Status.sent,
      senderId: botMessage.authorId,
      senderName: botMessage.authorName,
      senderDisplayName: botMessage.authorDisplayName,
      platformMessageId: (botMessage.rawPlatformMessage as any)?.id || botMessage.id,
      platformChannelId: botMessage.channelId,
      sentAt: new Date(botMessage.timestamp),
      __createdBy: issuer,
      __lastModifiedBy: issuer,
    });
  }
  
  /**
   * Create AI message from assistant response
   */
  static createAIMessage(
    conversationId: string,
    content: string,
    aiProvider: string,
    aiModel: string,
    senderId: string,
    issuer: string
  ): DyFM_Msg_Message {
    return new DyFM_Msg_Message({
      conversationId,
      content,
      type: DyFM_Msg_Type.aiToUser,
      status: DyFM_Msg_Status.sent,
      senderId,
      isAIGenerated: true,
      aiProvider,
      aiModel,
      sentAt: new Date(),
      __createdBy: issuer,
      __lastModifiedBy: issuer,
    });
  }
  
  /**
   * Extract mentions from message content
   * Looks for @username or @userId patterns
   */
  static extractMentions(content: string): string[] {
    const mentionRegex = /@(\w+)/g;
    const matches = content.match(mentionRegex);
    return matches ? matches.map(m => m.substring(1)) : [];
  }
  
  /**
   * Check if user has permission to access conversation
   */
  static userCanAccessConversation(
    conversation: DyFM_Msg_Conversation,
    userId: string
  ): boolean {
    return conversation.participants?.some(p => p.userId === userId) ?? false;
  }
}