#!/usr/bin/env python
from __future__ import print_function, division
import subprocess
from os.path import splitext, split

def run_fit(filename):
    head, tail = split(filename)
    root, ext = splitext(tail)
    output = root + '.txt'
    cmd = ["./fit", filename, "-o", output]
    subprocess.call(cmd)

if __name__ == '__main__':
    import argparse
    from multiprocessing import Pool, cpu_count
    import signal
    import os

    parser = argparse.ArgumentParser("fit multiple zdab files")
    parser.add_argument("-j", "--jobs", type=int, default=None,
                        help="number of jobs")
    parser.add_argument("filenames", nargs="+",
                        help="zdab files")
    args = parser.parse_args()

    jobs = args.jobs

    if jobs is None:
        jobs = cpu_count()

    # see https://stackoverflow.com/questions/11312525/catch-ctrlc-sigint-and-exit-multiprocesses-gracefully-in-python
    handler = signal.signal(signal.SIGINT, signal.SIG_IGN)
    p = Pool(jobs)
    signal.signal(signal.SIGINT, handler)
    try:
        result = p.map_async(run_fit,args.filenames)
        result.get()
    except KeyboardInterrupt:
        print("ctrl-c caught. quitting...")
        p.terminate()
        os.killpg(os.getpgid(0),9)
    else:
        p.close()

    p.join()