import type { AssistantConversationItem, AssistantSessionState } from "../types/assistant";

export interface CommitAssistantTurnAndLogInput {
  sessionId: string;
  assistantItem: AssistantConversationItem;
  eventType: string;
  logDetails: Record<string, unknown>;
  appendItem: (sessionId: string, item: AssistantConversationItem) => void;
  getSession: (sessionId: string) => AssistantSessionState | null;
  persistSession: (session: AssistantSessionState) => void;
  cloneConversation: (items: AssistantConversationItem[]) => AssistantConversationItem[];
  logEvent: (payload: {
    timestamp: string;
    level: "info";
    service: "assistant_loop";
    message: "assistant_message_processed";
    sessionId: string;
    eventType: string;
    details: Record<string, unknown>;
  }) => void;
  nowIso?: () => string;
}

export interface CommitAssistantTurnAndLogOutput {
  currentSession: AssistantSessionState | null;
  conversation: AssistantConversationItem[];
}

export function commitAssistantTurnAndLog(input: CommitAssistantTurnAndLogInput): CommitAssistantTurnAndLogOutput {
  input.appendItem(input.sessionId, input.assistantItem);
  const currentSession = input.getSession(input.sessionId);
  if (currentSession) {
    input.persistSession(currentSession);
  }
  const conversation = input.cloneConversation(currentSession?.items ?? []);
  input.logEvent({
    timestamp: (input.nowIso ?? (() => new Date().toISOString()))(),
    level: "info",
    service: "assistant_loop",
    message: "assistant_message_processed",
    sessionId: input.sessionId,
    eventType: input.eventType,
    details: input.logDetails
  });
  return {
    currentSession,
    conversation
  };
}