"""Generate a couple of tiny synthetic .mp4 files to smoke-test the pipeline."""

import os

import cv2
import numpy as np

OUT_DIR = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "sample_videos")
os.makedirs(OUT_DIR, exist_ok=True)


def make_video(path, seed, seconds=3, fps=10, size=(160, 120)):
    fourcc = cv2.VideoWriter_fourcc(*"mp4v")
    writer = cv2.VideoWriter(path, fourcc, fps, size)
    rng = np.random.default_rng(seed)
    base = rng.integers(0, 255, (size[1], size[0], 3), dtype=np.uint8)
    for i in range(seconds * fps):
        frame = base.copy()
        cv2.circle(frame, (20 + (i * 4) % size[0], 60), 10, (0, 0, 255), -1)
        writer.write(frame)
    writer.release()


if __name__ == "__main__":
    make_video(os.path.join(OUT_DIR, "original.mp4"), seed=1)
    make_video(os.path.join(OUT_DIR, "duplicate_reencoded.mp4"), seed=1)  # same content
    make_video(os.path.join(OUT_DIR, "unrelated.mp4"), seed=99)  # different content
    print("Wrote sample videos to", OUT_DIR)