import { describe, expect, it } from "vitest";
import { COPY, LANGS, VIDEO_IDS, translate } from "./videos";

const MAX_LINES = 2;
/** Longer lines get too small to read on a phone. */
const MAX_LINE_LENGTH = 24;

describe("video copy", () => {
  it.each(VIDEO_IDS)("%s has the same slides in every language", (id) => {
    const [first, ...others] = LANGS.map((lang) => Object.keys(COPY[id][lang].slides).sort());
    for (const slides of others) expect(slides).toEqual(first);
  });

  it.each(VIDEO_IDS)("%s keeps every headline to two short lines", (id) => {
    for (const lang of LANGS) {
      for (const [slide, lines] of Object.entries(COPY[id][lang].slides)) {
        expect(lines.length, `${id} ${lang} ${slide}`).toBeGreaterThan(0);
        expect(lines.length, `${id} ${lang} ${slide}`).toBeLessThanOrEqual(MAX_LINES);
        for (const line of lines) {
          expect(line.length, `${id} ${lang} ${slide}: "${line}"`).toBeLessThanOrEqual(MAX_LINE_LENGTH);
        }
      }
    }
  });

  it.each(VIDEO_IDS)("%s ends with a call to action slide", (id) => {
    for (const lang of LANGS) expect(COPY[id][lang].slides).toHaveProperty("cta");
  });

  it.each(VIDEO_IDS)("%s has a post that names the website and never an email address", (id) => {
    for (const lang of LANGS) {
      const { post } = COPY[id][lang];
      expect(post).toContain("www.mintel.me");
      expect(post).not.toContain("@");
    }
  });
});

describe("translate", () => {
  it("leaves English labels as they are", () => {
    expect(translate("en", "Invoice")).toBe("Invoice");
  });

  it("returns the German label when there is one", () => {
    expect(translate("de", "Invoice")).toBe("Rechnung");
  });

  it("falls back to the given text when there is no German label", () => {
    expect(translate("de", "Shop")).toBe("Shop");
  });
});