#!/usr/bin/env python3

import sys

def parse_freq(f: str) -> int:
    frequency = f.replace(".","")
    if (frequency == ''):
        return 0
    return int(frequency)

def write_output(frequency: int, text: str, filename: str):
    print(str(frequency) + " ; " + text + " ; Narrow FM; 10000; radioreference - " + filename)


if len(sys.argv) < 2:
    print("Missing input csv filename.", file=sys.stderr)
    sys.exit(1)

fn = sys.argv[1]
with open(fn) as fh:
    first_line = True
    headers = []
    for line in fh.read().split("\n"):

        if first_line:
            headers = line.split(",")
            first_line = False
            continue

        fields = line.split(",")
        if len(fields) < 4:
            continue

        f_output = parse_freq(fields[0])
        f_input = parse_freq(fields[1])
        callsign = fields[2].strip()
        category = fields[3].strip()
        description = fields[4].strip()

        if (f_output == 0) and (f_input == 0):
            continue

        outstr = ""
        if callsign != "":
            outstr += callsign + " : "
        if description != "":
            outstr += description + " (" + category + ")"
        else:
            outstr += category

        if (f_output != 0) and (f_input == 0):
            write_output(f_output, outstr, fn)
        elif (f_input != 0) and (f_output == 0):
            write_output(f_input, outstr, fn)
        else:
            write_output(f_input, "(input) " + outstr, fn)
            write_output(f_output, "(output) " + outstr, fn)