import { describe, expect, it } from "vitest";
import {
  buildTutorialImageFfmpegArgs,
  buildTutorialImageKey,
  buildTutorialImageUrl,
  getTutorialImageSpec,
} from "./tutorialImages";

describe("tutorialImages", () => {
  it("maps tennis categories to image specs", () => {
    expect(getTutorialImageSpec("forehand")?.sourcePageUrl).toContain("Ray_Dunlop_forehand");
    expect(getTutorialImageSpec("backhand")?.sourcePageUrl).toContain("Backhand_Federer");
    expect(getTutorialImageSpec("serve")?.sourcePageUrl).toContain("Serena_Williams_Serves");
    expect(getTutorialImageSpec("wall")?.sourcePageUrl).toContain("Tennis_wall");
    expect(getTutorialImageSpec("unknown")).toBeNull();
  });

  it("builds stable storage keys and public URLs", () => {
    expect(buildTutorialImageKey("forehand-fundamentals")).toBe("tutorials/forehand-fundamentals.webp");
    expect(buildTutorialImageUrl("forehand-fundamentals")).toBe("/uploads/tutorials/forehand-fundamentals.webp");
  });

  it("uses a fixed compression pipeline for tutorial images", () => {
    const args = buildTutorialImageFfmpegArgs("/tmp/input.jpg", "/tmp/output.webp");

    expect(args).toEqual([
      "-y",
      "-i",
      "/tmp/input.jpg",
      "-vf",
      "scale=1200:675:force_original_aspect_ratio=increase,crop=1200:675",
      "-frames:v",
      "1",
      "-c:v",
      "libwebp",
      "-quality",
      "78",
      "-compression_level",
      "6",
      "/tmp/output.webp",
    ]);
  });
});