import { writeFile } from "node:fs/promises";
import { WavCodec } from "@suaveplan/audio-codecs";

/** Write a minimal mono 44.1 kHz WAV file for fixture purposes. */
export async function writeWav(path: string, samples = 256): Promise<void> {
    const bytes = await WavCodec.encode([new Float32Array(samples)], {
        sampleRate: 44_100,
        bitDepth: 16,
        format: "pcm",
    });
    await writeFile(path, bytes);
}

/** Write a noisy 44.1 kHz mono WAV file so loudness analyses report a value. */
export async function writeNoisyWav(
    path: string,
    samples = 44_100
): Promise<void> {
    const buf = new Float32Array(samples);
    for (let i = 0; i < samples; i++) buf[i] = Math.sin(i * 0.01) * 0.5;
    const bytes = await WavCodec.encode([buf], {
        sampleRate: 44_100,
        bitDepth: 16,
        format: "pcm",
    });
    await writeFile(path, bytes);
}