import {
  conversationSchema,
  conversationSummarySchema,
  type ConversationResponse,
  type ConversationSummaryResponse,
} from "@great-agent/web-contracts";

export async function listConversations(): Promise<
  ConversationSummaryResponse[]
> {
  return conversationSummarySchema
    .array()
    .parse(await request("/api/conversations"));
}

export async function getConversation(
  id: string,
): Promise<ConversationResponse> {
  return conversationSchema.parse(
    await request(`/api/conversations/${encodeURIComponent(id)}`),
  );
}

async function request(path: string, init?: RequestInit): Promise<unknown> {
  const response = await fetch(path, {
    ...init,
    headers: { "content-type": "application/json", ...init?.headers },
  });
  const value = await response.json();
  if (!response.ok) throw new Error(readErrorMessage(value));
  return value;
}

function readErrorMessage(value: unknown): string {
  if (typeof value === "object" && value && "error" in value) {
    const error = value.error;
    if (
      typeof error === "object" &&
      error &&
      "message" in error &&
      typeof error.message === "string"
    )
      return error.message;
  }
  return "请求失败，请稍后重试";
}