import { expect } from "@std/expect";
import { describe, it as test } from "@std/testing/bdd";
import {
  MESSAGE_GROUPS_FILE,
  messageGroupsSource,
} from "#scripts/locale-groups/render.ts";
import { projectRoot } from "#scripts/project-root.ts";

describe("messageGroupsSource", () => {
  test("lists each catalog's group in order, with its literal type", () => {
    expect(messageGroupsSource(["nav.json", "address-lookup.json"])).toBe(
      [
        "// Generated by `deno task locales:generate` from src/locales/en/. Do not edit.",
        "",
        "export const MESSAGE_GROUPS = [",
        '  "address-lookup",',
        '  "nav",',
        "] as const;",
        "",
        "export type MessageGroup = (typeof MESSAGE_GROUPS)[number];",
        "",
      ].join("\n"),
    );
  });

  test("fails loudly on a file that is not a catalog", () => {
    expect(() => messageGroupsSource(["nav.json", "notes.txt"])).toThrow(
      "Not a message catalog: src/locales/en/notes.txt",
    );
  });
});

describe("the generated message group list", () => {
  test("matches the catalog files (run deno task locales:generate)", async () => {
    const fileNames = Array.from(
      Deno.readDirSync(`${projectRoot}/src/locales/en`),
      (entry) => entry.name,
    );
    expect(
      await Deno.readTextFile(`${projectRoot}/${MESSAGE_GROUPS_FILE}`),
    ).toBe(messageGroupsSource(fileNames));
  });
});