import { describe, expect, test } from "bun:test";
import {
	DEFAULT_AUDIO_INPUT_DEVICE_ID,
	buildVoiceOverAudioConstraints,
	normalizeSelectedDeviceId,
	type VoiceOverInputDevice,
} from "@/voiceover/devices";

const devices: VoiceOverInputDevice[] = [
	{
		deviceId: DEFAULT_AUDIO_INPUT_DEVICE_ID,
		label: "System default microphone",
		isDefault: true,
	},
	{
		deviceId: "blue-yeti-snowball",
		label: "Blue Snowball",
		isDefault: false,
	},
];

describe("buildVoiceOverAudioConstraints", () => {
	test("uses default processing constraints without an exact device", () => {
		const constraints = buildVoiceOverAudioConstraints({ deviceId: null });
		expect(constraints.audio).toEqual({
			echoCancellation: true,
			noiseSuppression: true,
			autoGainControl: true,
		});
	});

	test("adds an exact device constraint for a selected microphone", () => {
		const constraints = buildVoiceOverAudioConstraints({
			deviceId: "blue-yeti-snowball",
		});
		expect(constraints.audio).toEqual({
			deviceId: { exact: "blue-yeti-snowball" },
			echoCancellation: true,
			noiseSuppression: true,
			autoGainControl: true,
		});
	});
});

describe("normalizeSelectedDeviceId", () => {
	test("keeps the selected device when it is still present", () => {
		expect(
			normalizeSelectedDeviceId({
				deviceId: "blue-yeti-snowball",
				devices,
			}),
		).toBe("blue-yeti-snowball");
	});

	test("clears a selected device when it is no longer present", () => {
		expect(
			normalizeSelectedDeviceId({
				deviceId: "missing",
				devices,
			}),
		).toBeNull();
	});

	test("keeps the browser default device id", () => {
		expect(
			normalizeSelectedDeviceId({
				deviceId: DEFAULT_AUDIO_INPUT_DEVICE_ID,
				devices: [],
			}),
		).toBe(DEFAULT_AUDIO_INPUT_DEVICE_ID);
	});
});