extern crate kairos;

use kairos::timetype::TimeType as TT;

fn pretty_print(tt: TT) {
    match tt {
        TT::Seconds(e)  => println!("{} Seconds", e),
        TT::Minutes(e)  => println!("{} Minutes", e),
        TT::Hours(e)    => println!("{} Hours", e),
        TT::Days(e)     => println!("{} Days", e),
        TT::Months(e)   => println!("{} Months", e),
        TT::Years(e)    => println!("{} Years", e),
        TT::Moment(ndt) => println!("{} ", ndt),
        other           => println!("Cannot pretty-print: '{:?}'", other),
    }
}

fn main() {
    // not sure whether this is actually fast or something, but we don't care here, do we?
    let s = ::std::env::args().skip(1).fold(String::new(), |acc, obj| format!("{} {}", acc, obj));
    let s = s.trim(); // because kairos is not yet whitespace tolerant

    match kairos::parser::parse(s) {
        Err(e) => println!("Error -> {:?}", e),
        Ok(kairos::parser::Parsed::TimeType(tt)) => match tt.calculate() {
            Ok(r)  => pretty_print(r),
            Err(e) => println!("Error calculating: {:?}", e),
        },
        Ok(kairos::parser::Parsed::Iterator(Ok(ui))) => for elem in ui {
            match elem {
                Ok(r)  => pretty_print(r),
                Err(e) => {
                    println!("Error calculating: {:?}", e);
                    ::std::process::exit(1)
                }
            }
        },
        Ok(kairos::parser::Parsed::Iterator(Err(e))) => {
            println!("Failed building iterator: {:?}", e);
        },
    }
}