import { notificationToDesktopText, type NotificationInput } from "./notify-protocol.ts";
import type { Runtime } from "./runtime.ts";

export const OSASCRIPT_PATH = "/usr/bin/osascript";

export function escapeAppleScriptLiteral(value: string): string {
  return value
    .replaceAll("\\", "\\\\")
    .replaceAll("\"", "\\\"")
    .replace(/[\r\n\u2028\u2029]/gu, character => character === "\r" ? "\\r" : "\\n");
}

export function resolveMacosNotifier(runtime: Runtime): string | null {
  try {
    return runtime.isExecutable(OSASCRIPT_PATH) ? OSASCRIPT_PATH : null;
  } catch {
    return null;
  }
}

export function buildMacosNotifyCommand(input: NotificationInput, path = OSASCRIPT_PATH): string[] {
  const { title, body } = notificationToDesktopText(input);
  const script = `display notification "${escapeAppleScriptLiteral(body)}" with title "${escapeAppleScriptLiteral(title)}"`;
  return [path, "-e", script];
}

export function resolveMacosDesktopCommand(input: NotificationInput, runtime: Runtime): { command: string; args: string[] } | null {
  const path = resolveMacosNotifier(runtime);
  if (!path) return null;
  const argv = buildMacosNotifyCommand(input, path);
  return { command: argv[0]!, args: argv.slice(1) };
}

export function sendMacosDesktopNotification(input: NotificationInput, runtime: Runtime): boolean {
  const resolved = resolveMacosDesktopCommand(input, runtime);
  if (!resolved) return false;
  runtime.spawnDetached(resolved.command, resolved.args);
  return true;
}