import { sprintf as sprintfjs } from "sprintf-js";

type ReplacementValue = string | number; // We could accept more types, this is questionable.
type Replacement = ReplacementValue | (() => ReplacementValue);

function sprintf(format: string, ...replacements: Replacement[]): string;
function sprintf(
  format: string,
  replacementMap: Record<string, Replacement>
): string;
function sprintf(
  format: string,
  ...replacements: Replacement[] | [Record<string, Replacement>]
): string {
  return sprintfjs(format, ...replacements);
}
// Demo
console.log("=== These work fine ===");
console.log(sprintf("%s %s", "hello", "world"));
console.log(sprintf("%2$s %1$s", () => "world", "hello"));
console.log(sprintf("hello %(target)s", { target: "world" }));
console.log(sprintf("It's over %1$d!", () => 9000));
console.log(sprintf("It's over %(power)f!", { power: () => 9000 }));

console.log("=== Type errors ===");
console.log(sprintf("Hello %s", "world", { bad: "map" }));
console.log(sprintf("Hello %s", null));
console.log(sprintf("Hello %s", false));
console.log(sprintf("Hello %s", undefined));
console.log(sprintf("hello %(target)s", { target: "world" }, "extra-string"));
console.log(sprintf("It's over %1$d!", () => null));
console.log(sprintf("It's over %(power)s!", { power: () => undefined }));

// This is questionable, but not a type error.
console.log(sprintf("Hello %s")); // We can't actually prevent this empty `...args`