const BASE = "/api/v1";

function getToken(): string | null {
  return localStorage.getItem("accessToken");
}

export function setTokens(accessToken: string, refreshToken: string) {
  localStorage.setItem("accessToken", accessToken);
  localStorage.setItem("refreshToken", refreshToken);
}

export function clearTokens() {
  localStorage.removeItem("accessToken");
  localStorage.removeItem("refreshToken");
}

async function request<T>(
  path: string,
  options: RequestInit = {}
): Promise<T> {
  const token = getToken();
  const headers: Record<string, string> = {
    "Content-Type": "application/json",
    ...(options.headers as Record<string, string>),
  };
  if (token) headers["Authorization"] = `Bearer ${token}`;

  const res = await fetch(`${BASE}${path}`, { ...options, headers });

  if (!res.ok) {
    const body = await res.json().catch(() => ({}));
    const message = body?.error?.message ?? `HTTP ${res.status}`;
    throw new Error(message);
  }

  return res.json() as Promise<T>;
}

export const api = {
  get: <T>(path: string) => request<T>(path),
  post: <T>(path: string, body: unknown) =>
    request<T>(path, { method: "POST", body: JSON.stringify(body) }),
  put: <T>(path: string, body: unknown) =>
    request<T>(path, { method: "PUT", body: JSON.stringify(body) }),
  patch: <T>(path: string, body: unknown) =>
    request<T>(path, { method: "PATCH", body: JSON.stringify(body) }),
  delete: <T>(path: string) => request<T>(path, { method: "DELETE" }),
};