import { expect, test } from "@playwright/test";
import {
  CANVAS_MAX_ZOOM,
  CANVAS_MIN_ZOOM,
  sanitizeCanvasZoomInput,
  stepCanvasZoom,
} from "@/lib/canvas/zoom";

test.describe("video canvas zoom", () => {
  test("uses the competitor's 1.2x zoom factor in both directions", () => {
    expect(stepCanvasZoom(0.5, "in")).toBe(0.6);
    expect(stepCanvasZoom(1, "in")).toBe(1.2);
    expect(stepCanvasZoom(1.2, "out")).toBe(1);
    expect(stepCanvasZoom(0.5, "out")).toBe(0.42);
    expect(stepCanvasZoom(0.42, "out")).toBe(0.35);
  });

  test("clamps zoom steps to the observed ten and eight-hundred percent limits", () => {
    expect(stepCanvasZoom(CANVAS_MIN_ZOOM, "out")).toBe(CANVAS_MIN_ZOOM);
    expect(stepCanvasZoom(CANVAS_MAX_ZOOM, "in")).toBe(CANVAS_MAX_ZOOM);
  });

  test("keeps only digits in manual percentage input", () => {
    expect(sanitizeCanvasZoomInput("12a.5%")).toBe("125");
  });
});