use std::io;

fn main() {
    let mut untranslated = String::new();

    println!("What would you like translated?");

    io::stdin()
        .read_line(&mut untranslated)
        .expect("Failed to read line");

    let vec: Vec<char> = untranslated.as_str().chars().collect();
    let trimmed: String = vec[..vec.len() - 1].iter().collect();
    let translated = to_pig_latin(trimmed);

    println!("Translated:\n{}", translated);
}

fn to_pig_latin(original: String) -> String {
    let words = original.split(" ");
    let mut res = String::from(" ");

    for word in words {
        res.push_str(word_to_pig_latin(String::from(word)).as_str());
        res.push(' ');
    }

    res
}

fn word_to_pig_latin(word: String) -> String {
    let chars_vec: Vec<char> = word.as_str().chars().collect();

    if is_vowel(&chars_vec[0]) {
        format!("{}-hay", word)
    } else {
        let first = chars_vec[0];
        let base: String = chars_vec[1..chars_vec.len()].iter().collect();

        format!("{}-{}ay", base.as_str(), first)
    }
}

fn is_vowel(c: &char) -> bool {
    let vowels = ['a', 'e', 'i', 'o', 'u', 'y'].iter();
    let mut res: bool = false;

    for letter in vowels {
        if c == letter {
            res = true
        }
    }

    res
}