/******************************************************************************
 * This program computes NFL passer ratings.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#![allow(dead_code)]
#![allow(non_snake_case)]
#![allow(non_upper_case_globals)]
#[macro_use]
mod utils;

fn main() {
    match (|| -> Result<(), utils::CustomError>{
        let mut input_str:String;
        let mut attempts:isize;
        input_str = Utils.prompt("Number of attempts: ");
        attempts = input_str.trim().parse::<i32>().unwrap()?;
        let mut completions:isize;
        input_str = Utils.prompt("Number of completions: ");
        completions = input_str.trim().parse::<i32>().unwrap()?;
        let mut touchdown_passes:isize;
        input_str = Utils.prompt("Number of touchdown passes: ");
        touchdown_passes = input_str.trim().parse::<i32>().unwrap()?;
        let mut interceptions:isize;
        input_str = Utils.prompt("Number of interceptions: ");
        interceptions = input_str.trim().parse::<i32>().unwrap()?;
        let mut passing_yards:isize;
        input_str = Utils.prompt("Number of passing yards: ");
        passing_yards = input_str.trim().parse::<i32>().unwrap()?;
        let mut which:isize;
        input_str = Utils.prompt("1 for NFL or 2 for NCAA: ");
        which = input_str.trim().parse::<i32>().unwrap()?;

        if which == 1 {
            let a:f64 = (f64::from(completions) / f64::from(attempts) - 0.3f64) * 5.f64;
            let b:f64 = (f64::from(passing_yards) / f64::from(attempts) - 3.f64) * 0.25f64;
            let c:f64 = f64::from(touchdown_passes) / f64::from(attempts) * 20.f64;
            let d:f64 = 2.375f64 - (f64::from(interceptions) / f64::from(attempts) * 25.f64);
            let rating:f64 = (a + b + c + d) / 6.f64 * 100.f64;
            println!("NFL Passer rating: {0:.1}", rating);
        } else {
            let a:f64 = 8.4f64 * (passing_yards) as f64;
            let b:f64 = 330.f64 * (touchdown_passes) as f64;
            let c:f64 = 100.f64 * (completions) as f64;
            let d:f64 = 200.f64 * (interceptions) as f64;
            let rating:f64 = (a + b + c - d) / (attempts) as f64;
            println!("NCAA Passer rating: {0:.1}", rating);
        }
        return Ok(());
    })() {
        Ok(()) => {},
        Err(ex) => {
            match ex {
                utils::CustomError::NumberFormatError(ex) => {
                    println!("{}", String::from("Bad input! ") + &format!("{}", ex));
                }
                _ => {
                    println!("Don't know what went wrong!");
                }
            }
        }
    };
}