import { base64ToArrayBuffer } from "obsidian";

/**
 * Decodes a base64 encoded string, this properly
 * handles emojis and other non ASCII chars.
 *
 * @param s base64 encoded string
 * @returns Decoded string
 */
export function decodeBase64String(s: string): string {
  const buffer = base64ToArrayBuffer(s);
  const decoder = new TextDecoder();
  return decoder.decode(buffer);
}

/**
 * Copies the provided text to the system clipboard.
 * Uses the modern Clipboard API with a fallback to older APIs.
 *
 * @param text The string to be copied to clipboard
 * @returns A promise that resolves when the text has been copied
 */
export async function copyToClipboard(text: string) {
  try {
    await navigator.clipboard.writeText(text);
  } catch (err) {
    // Fallback for devices like iOS that don't support Clipboard API
    const textarea = document.createElement("textarea");
    textarea.value = text;
    textarea.setAttribute("readonly", "");
    textarea.style.position = "absolute";
    textarea.style.left = "-9999px";
    document.body.appendChild(textarea);

    textarea.select();
    document.execCommand("copy");
    document.body.removeChild(textarea);
  }
}