use serde::{Deserialize, Serialize};

/// Simple ELO rating without deviation or volatility
#[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
pub struct EloRating {
    pub rating: f64,  // Display scale (e.g., 1500)
}

impl EloRating {
    pub fn new_player() -> Self {
        Self {
            rating: 1500.0,
        }
    }
    
    pub fn new_with_rating(rating: f64) -> Self {
        Self { rating }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    
    #[test]
    fn test_new_player() {
        let rating = EloRating::new_player();
        assert_eq!(rating.rating, 1500.0);
    }
    
    #[test]
    fn test_new_with_rating() {
        let rating = EloRating::new_with_rating(1600.0);
        assert_eq!(rating.rating, 1600.0);
    }
}