import { expect, test } from "bun:test";

import {
  buildVncWheelPointerEvents,
  computeContainedRemoteDisplayScale,
  encodeVncKeyEvent,
  encodeVncPointerEvent,
  mapClientToFramebufferPoint,
  normalizeVncPassword,
  resolveVncKeysymFromKeyboardEvent,
  vncButtonMaskForPointerButton,
} from "../../web/src/panes/vnc-input.js";

test("encodeVncPointerEvent writes VNC pointer-event bytes", () => {
  expect(Array.from(encodeVncPointerEvent(5, 300, 400))).toEqual([
    5,
    5,
    0x01,
    0x2c,
    0x01,
    0x90,
  ]);
});

test("vncButtonMaskForPointerButton maps primary mouse buttons", () => {
  expect(vncButtonMaskForPointerButton(0)).toBe(1);
  expect(vncButtonMaskForPointerButton(1)).toBe(2);
  expect(vncButtonMaskForPointerButton(2)).toBe(4);
  expect(vncButtonMaskForPointerButton(5)).toBe(0);
});

test("mapClientToFramebufferPoint maps scaled display coordinates into framebuffer space", () => {
  expect(mapClientToFramebufferPoint(150, 75, { left: 100, top: 50, width: 200, height: 100 }, 800, 400))
    .toEqual({ x: 200, y: 100 });
  expect(mapClientToFramebufferPoint(999, -20, { left: 100, top: 50, width: 200, height: 100 }, 800, 400))
    .toEqual({ x: 799, y: 0 });
});

test("buildVncWheelPointerEvents emits press+release events", () => {
  const [press, release] = buildVncWheelPointerEvents(-1, 10, 20, 1);
  expect(Array.from(press)).toEqual([5, 9, 0, 10, 0, 20]);
  expect(Array.from(release)).toEqual([5, 1, 0, 10, 0, 20]);
});

test("encodeVncKeyEvent writes VNC key-event bytes", () => {
  expect(Array.from(encodeVncKeyEvent(true, 0xff0d))).toEqual([
    4,
    1,
    0,
    0,
    0,
    0,
    0xff,
    0x0d,
  ]);
});

test("resolveVncKeysymFromKeyboardEvent maps special keys and printable characters", () => {
  expect(resolveVncKeysymFromKeyboardEvent({ key: "Enter" })).toBe(0xff0d);
  expect(resolveVncKeysymFromKeyboardEvent({ key: "ArrowLeft" })).toBe(0xff51);
  expect(resolveVncKeysymFromKeyboardEvent({ key: "a" })).toBe(0x61);
  expect(resolveVncKeysymFromKeyboardEvent({ key: "é" })).toBe(0xe9);
  expect(resolveVncKeysymFromKeyboardEvent({ key: "😀" })).toBe((0x01000000 | 0x1f600) >>> 0);
  expect(resolveVncKeysymFromKeyboardEvent({ key: "Unidentified", code: "ShiftRight" })).toBe(0xffe2);
  expect(resolveVncKeysymFromKeyboardEvent({ key: "Dead" })).toBeNull();
});

test("normalizeVncPassword treats empty strings as unset", () => {
  expect(normalizeVncPassword("")).toBeNull();
  expect(normalizeVncPassword("secret")).toBe("secret");
  expect(normalizeVncPassword(null)).toBeNull();
});

test("computeContainedRemoteDisplayScale fits the framebuffer without integer snap", () => {
  expect(computeContainedRemoteDisplayScale(1000, 700, 800, 600)).toBeCloseTo(1.1666666, 5);
  expect(computeContainedRemoteDisplayScale(400, 300, 800, 600)).toBe(0.5);
});