/**
 * 聊天历史响应 DTO
 */
import {
  ChatHistoryResponseSchema,
  type ChatHistoryResponseInput,
  type ChatHistoryResponseData,
} from "@/data/schemas/chat/response/chat_history_response";
import { ChatMessage } from "../chat_message";

export class ChatHistoryResponse {
  declare readonly messages: ChatMessage[];

  private constructor(input: ChatHistoryResponseInput) {
    const data = ChatHistoryResponseSchema.parse(input);
    Object.assign(this, {
      ...data,
      messages: data.messages.map((m) => ChatMessage.from(m)),
    });
    Object.freeze(this);
  }

  static from(input: ChatHistoryResponseInput): ChatHistoryResponse {
    return new ChatHistoryResponse(input);
  }

  static fromJson(json: unknown): ChatHistoryResponse {
    return ChatHistoryResponse.from(json as ChatHistoryResponseInput);
  }

  toJson(): ChatHistoryResponseData {
    return ChatHistoryResponseSchema.parse(this);
  }
}