pub trait Stat {
    fn score(&self) -> u8;

    fn modifier(&self) -> i8 {
        return (self.score() as i8 / 2) - 5;
    }

    fn skill(&self, proficiency: u8, proficient : bool, expert : bool) -> i8 {
        let modifier : i8 = self.modifier();
        let proficiency_boost : u8 = proficiency * proficient as u8;
        let expertise_boost : u8 = proficiency * expert as u8;
        return modifier + (proficiency_boost as i8) + (expertise_boost as i8);
    }
}

pub trait StatSet {
    fn strength(&self) -> impl Stat;
    fn dexterity(&self) -> impl Stat;
    fn constitution(&self) -> impl Stat;
    fn intelligence(&self) -> impl Stat;
    fn wisdom(&self) -> impl Stat;
    fn charisma(&self) -> impl Stat;
}

impl Stat for u8 {
    fn score(&self) -> u8 {
        return *self;
    }
}

struct Player {
    strength_score: u8,
    dexterity_score: u8,
    constitution_score: u8,
    intelligence_score: u8,
    wisdom_score: u8,
    charisma_score: u8
}

impl StatSet for Player {
    fn strength(&self) -> impl Stat {
        return self.strength_score;
    }
    fn dexterity(&self) -> impl Stat {
        return self.dexterity_score;
    }
    fn constitution(&self) -> impl Stat {
        return self.constitution_score;
    }
    fn intelligence(&self) -> impl Stat {
        return self.intelligence_score;
    }
    fn wisdom(&self) -> impl Stat {
        return self.wisdom_score;
    }
    fn charisma(&self) -> impl Stat {
        return self.charisma_score;
    }
}


fn main() {
    let demo : Player = Player {
        strength_score: 12,
        dexterity_score: 20,
        constitution_score: 15,
        intelligence_score: 10,
        wisdom_score: 5,
        charisma_score: 1
    };

    println!("STR Modifier: {}", demo.strength().modifier());
    println!("DEX Modifier: {}", demo.dexterity().modifier());
    println!("CON Modifier: {}", demo.constitution().modifier());
    println!("INT Modifier: {}", demo.intelligence().modifier());
    println!("WIS Modifier: {}", demo.wisdom().modifier());
    println!("CHA Modifier: {}", demo.charisma().modifier());
}