"""Sparse sine reconstruction using the public contract, independent of a GUI."""
import argparse
import math
from pathlib import Path

from set_devices.plot_processing import Axis, Series, Snapshot, prepare, process, write_csv
from set_devices.signal_reconstruction import METHODS


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--method", choices=METHODS, default="spline")
    parser.add_argument("--degree", type=int, default=3)
    parser.add_argument("--points", type=int, default=201)
    parser.add_argument("--output", type=Path, default=Path("curve.csv"))
    args = parser.parse_args()
    samples = [(i * 125, math.sin(i * math.pi / 4)) for i in range(9)]
    snapshot = Snapshot((Series("sine", "Синусоида: 9 отсчётов", samples, y_unit="В"),),
                        Axis("Время", "мс"), "sparse-sine")
    curve = process(prepare(snapshot, "sine", args.method, args.points, args.degree))
    with args.output.open("w", encoding="utf-8-sig", newline="") as stream:
        write_csv(curve, stream)
    print(f"{args.output}: {curve.input_count} -> {len(curve.points)}; RMSE={curve.rmse:.6g}")


if __name__ == "__main__":
    main()