import * as assert from "node:assert";
import { describe, it } from "node:test";

import { ScrcpyControlMessageType } from "../../base/index.js";

import { ScrollController } from "./scroll-controller.js";

describe("ScrollController", () => {
    it("should return undefined when scroll distance is less than 1", () => {
        const controller = new ScrollController();
        const message = controller.serializeScrollMessage({
            type: ScrcpyControlMessageType.InjectScroll,
            pointerX: 0,
            pointerY: 0,
            videoWidth: 0,
            videoHeight: 0,
            scrollX: 0.5,
            scrollY: 0.5,
            buttons: 0,
        });
        assert.strictEqual(message, undefined);
    });

    it("should return a message when scroll distance is greater than 1", () => {
        const controller = new ScrollController();
        const message = controller.serializeScrollMessage({
            type: ScrcpyControlMessageType.InjectScroll,
            pointerX: 0,
            pointerY: 0,
            videoWidth: 0,
            videoHeight: 0,
            scrollX: 1.5,
            scrollY: 1.5,
            buttons: 0,
        });
        assert.ok(message instanceof Uint8Array);
        assert.strictEqual(message.byteLength, 21);
    });

    it("should return a message when accumulated scroll distance is greater than 1", () => {
        const controller = new ScrollController();
        controller.serializeScrollMessage({
            type: ScrcpyControlMessageType.InjectScroll,
            pointerX: 0,
            pointerY: 0,
            videoWidth: 0,
            videoHeight: 0,
            scrollX: 0.5,
            scrollY: 0.5,
            buttons: 0,
        });
        const message = controller.serializeScrollMessage({
            type: ScrcpyControlMessageType.InjectScroll,
            pointerX: 0,
            pointerY: 0,
            videoWidth: 0,
            videoHeight: 0,
            scrollX: 0.5,
            scrollY: 0.5,
            buttons: 0,
        });
        assert.ok(message instanceof Uint8Array);
        assert.strictEqual(message.byteLength, 21);
    });

    it("should return a message when accumulated scroll distance is less than -1", () => {
        const controller = new ScrollController();
        controller.serializeScrollMessage({
            type: ScrcpyControlMessageType.InjectScroll,
            pointerX: 0,
            pointerY: 0,
            videoWidth: 0,
            videoHeight: 0,
            scrollX: -0.5,
            scrollY: -0.5,
            buttons: 0,
        });
        const message = controller.serializeScrollMessage({
            type: ScrcpyControlMessageType.InjectScroll,
            pointerX: 0,
            pointerY: 0,
            videoWidth: 0,
            videoHeight: 0,
            scrollX: -0.5,
            scrollY: -0.5,
            buttons: 0,
        });
        assert.ok(message instanceof Uint8Array);
        assert.strictEqual(message.byteLength, 21);
    });
});