use std::ffi::CStr;
use libc::c_char;

mod radio;

const COPYRIGHT: &'static str = "Copyright (C) 2018 Serge Vakulenko KK6ABQ";

#[no_mangle]
pub extern "C" fn print_usage(version_ptr: *const c_char) {
  let version: String = unsafe { CStr::from_ptr(version_ptr) }.to_string_lossy().to_string();

  print!("DMR Config, Version {}, {}", version, COPYRIGHT);

  let msg = r#"
Usage:
    dmrconfig -r [-t]
                          Read codeplug from the radio to a file 'device.img'.
                          Save configuration to a text file 'device.conf'.
    dmrconfig -w [-t] file.img
                          Write codeplug to the radio.
    dmrconfig -v [-t] file.conf
                          Verify configuration script for the radio.
    dmrconfig -c [-t] file.conf
                          Apply configuration script to the radio.
    dmrconfig -c file.img file.conf
                          Apply configuration script to the codeplug image.
                          Store modified copy to a file 'device.img'.
    dmrconfig file.img
                          Display configuration from the codeplug image.
    dmrconfig -u [-t] file.csv
                          Update contacts database from CSV file.
Options:
    -r           Read codeplug from the radio.
    -w           Write codeplug to the radio.
    -c           Configure the radio from a text script.
    -v           Verify config file.
    -u           Update contacts database.
    -l           List all supported radios.
    -t           Trace USB protocol."#;
  print!("{}", msg);
  std::process::exit(-1);
}

#[no_mangle]
pub extern "C" fn process_options() {
  use getopts::Options;

  let mut opts = Options::new();
  opts.optflag("t", "", "Trace USB protocol.");
  opts.optflag("r", "", "Read codeplug from the radio to a file 'device.img'.\nSave configuration to a text file 'device.conf'.");
  opts.optflag("w", "", "Write codeplug to the radio.");
  opts.optflag("c", "", "Verify configuration script for the radio.");
  opts.optflag("u", "", "Update contacts database from CSV file.");
  opts.optflag("l", "", "List all supported radios.");
  opts.optflag("v", "", "Verify configuration script for the radio.");

}

#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
    }
}