import { HttpError } from "./http-error";

async function http<T>(path: string, config: RequestInit): Promise<T> {
  const request = new Request(path, config);
  const response: Response = await fetch(request);

  if (!response.ok) {
    const errJson = await response.json();
    const err = HttpError.fromRequest(request, {
      ...response,
      statusText: errJson.message || response.statusText,
    });
    throw err;
  }
  // may error if there is no body, return empty array
  return await response.json();
}

export async function get<T>(path: string, config?: RequestInit): Promise<T> {
  const init = { method: "GET", ...config };
  return await http<T>(path, init);
}

export async function post<T, U>(path: string, body: T, config?: RequestInit): Promise<U> {
  const init = {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
    ...config,
  };
  return await http<U>(path, init);
}

export async function put<T, U>(path: string, body: T, config?: RequestInit): Promise<U> {
  const init = {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
    ...config,
  };
  return await http<U>(path, init);
}

export async function patch<T, U>(path: string, body: T, config?: RequestInit): Promise<U> {
  const init = {
    method: "PATCH",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
    ...config,
  };
  return await http<U>(path, init);
}

export async function remove<T, U>(path: string, body: T, config?: RequestInit): Promise<U> {
  const init = {
    method: "DELETE",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
    ...config,
  };
  return await http<U>(path, init);
}