import { clsx, type ClassValue } from "clsx";
import { twMerge } from "tailwind-merge";

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

export async function fetcher<JSON = any>(input: RequestInfo, init?: RequestInit): Promise<JSON> {
  const res = await fetch(input, init);

  if (!res.ok) {
    const json = await res.json();
    if (json.error) {
      const error = new Error(json.error) as Error & {
        status: number;
      };
      error.status = res.status;
      throw error;
    } else {
      throw new Error("An unexpected error occurred");
    }
  }

  return res.json();
}

export function formatDate(input: string | number | Date): string {
  const date = new Date(input);
  return date.toLocaleDateString("en-US", {
    month: "long",
    day: "numeric",
    year: "numeric",
  });
}

export const arraysAreEqual = (arr1: number[], arr2: number[]): boolean =>
  arr1.length === arr2.length && arr1.every((value, index) => value === arr2[index]);

export function nullableCompatibleEqualityCheck<T>(
  naiveEqualityCheck: (a: T, b: T) => boolean,
  a: T | null | undefined,
  b: T | null | undefined,
): boolean {
  if (a === null || a === undefined || b === null || b === undefined) {
    return a === b;
  }

  return naiveEqualityCheck(a, b);
}