import { describe, expect, it } from "vitest";
import {
  previewBounds,
  previewLoadError,
  previewShortcut,
  previewUrl,
} from "./browser-preview-policy.js";

describe("previewUrl", () => {
  it("accepts only http(s) without credentials", () => {
    expect(previewUrl("http://localhost:5173")).toBe("http://localhost:5173/");
    expect(previewUrl("https://example.com/a?b=1")).toBe("https://example.com/a?b=1");
    for (const value of [
      "file:///etc/hosts",
      "javascript:alert(1)",
      "chrome://settings",
      "https://user:fake-password@example.com",
      "not a url",
      42,
      `https://example.com/${"a".repeat(9000)}`,
    ]) {
      expect(previewUrl(value)).toBeNull();
    }
  });
});

describe("previewBounds", () => {
  const content = { width: 1200, height: 800 };

  it("rounds and applies the app zoom factor", () => {
    expect(previewBounds({ x: 800.4, y: 40.6, width: 399.5, height: 700 }, content)).toEqual({
      x: 800,
      y: 41,
      width: 400,
      height: 700,
    });
    expect(previewBounds({ x: 100, y: 10, width: 200, height: 100 }, content, 1.25)).toEqual({
      x: 125,
      y: 13,
      width: 250,
      height: 125,
    });
  });

  it("clamps to the window and rejects empty or malformed rectangles", () => {
    expect(previewBounds({ x: -50, y: -10, width: 5000, height: 5000 }, content)).toEqual({
      x: 0,
      y: 0,
      width: 1200,
      height: 800,
    });
    expect(previewBounds({ x: 1300, y: 0, width: 100, height: 100 }, content)).toBeNull();
    expect(previewBounds({ x: 0, y: 0, width: 0, height: 100 }, content)).toBeNull();
    expect(previewBounds({ x: "1", y: 0, width: 1, height: 1 }, content)).toBeNull();
    expect(previewBounds({ x: Number.NaN, y: 0, width: 1, height: 1 }, content)).toBeNull();
    expect(previewBounds(null, content)).toBeNull();
  });
});

describe("previewShortcut", () => {
  const key = (overrides: Partial<Parameters<typeof previewShortcut>[0]>) => ({
    type: "keyDown",
    key: "r",
    control: false,
    meta: false,
    alt: false,
    shift: false,
    ...overrides,
  });

  it("maps platform browser shortcuts", () => {
    expect(previewShortcut(key({ meta: true }), "darwin")).toBe("reload");
    expect(previewShortcut(key({ meta: true, shift: true, key: "R" }), "darwin")).toBe(
      "hard-reload",
    );
    expect(previewShortcut(key({ control: true }), "linux")).toBe("reload");
    expect(previewShortcut(key({ meta: true, key: "[" }), "darwin")).toBe("back");
    expect(previewShortcut(key({ alt: true, key: "ArrowRight" }), "win32")).toBe("forward");
    expect(previewShortcut(key({ key: "F12" }), "linux")).toBe("devtools");
    expect(previewShortcut(key({ key: "F5" }), "win32")).toBe("reload");
  });

  it("leaves typing alone", () => {
    expect(previewShortcut(key({}), "darwin")).toBeNull();
    expect(previewShortcut(key({ control: true }), "darwin")).toBeNull();
    expect(previewShortcut(key({ type: "keyUp", meta: true }), "darwin")).toBeNull();
    expect(previewShortcut(key({ key: "ArrowLeft" }), "linux")).toBeNull();
  });
});

describe("previewLoadError", () => {
  it("ignores superseded navigations", () => {
    expect(previewLoadError(-3, "ERR_ABORTED")).toBeNull();
    expect(previewLoadError(-102, "ERR_CONNECTION_REFUSED")).toBe("ERR_CONNECTION_REFUSED");
  });
});