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use std::fmt::{Formatter, Display, Error};

#[derive(Debug, PartialEq, Clone)]
pub enum Tile {
    BLACK,
    WHITE,
    FREE,
}

impl Default for Tile {
    fn default() -> Self {
        Tile::FREE
    }
}

impl Tile {
    #[allow(dead_code)]
    pub fn from_str(s: &str) -> Tile {
        match s {
            "B" | "b" => Tile::BLACK,
            "W" | "w" => Tile::WHITE,
            _ => Tile::FREE,
        }
    }

    pub fn is_pawn(&self) -> bool {
        *self == Tile::BLACK || *self == Tile::WHITE
    }

    /// Return the tile of the ennemy if there is one, return the tile itself
    /// otherwise.

    pub fn ennemy(&self) -> Tile {
        match *self {
            Tile::BLACK => Tile::WHITE,
            Tile::WHITE => Tile::BLACK,
            _ => self.clone(),
        }
    }
}

impl Display for Tile {
    fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
        match self {
            &Tile::BLACK => {
                let _ = write!(f, "B");
            }
            &Tile::WHITE => {
                let _ = write!(f, "W");
            }
            &Tile::FREE => {
                let _ = write!(f, ".");
            }
        };
        Ok(())
    }
}

impl Copy for Tile {}