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/// The player ID.
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub enum Player {
    P0,
    P1,
    P2,
    P3,
}

impl Player {
    /// Get all players.
    #[inline]
    #[must_use]
    pub fn all() -> [Player; 4] {
        use Player::{P0, P1, P2, P3};
        [P0, P1, P2, P3]
    }

    /// Get all players except this one.
    #[must_use]
    pub fn others(&self) -> [Player; 3] {
        use Player::{P0, P1, P2, P3};
        match self {
            P0 => [P1, P2, P3],
            P1 => [P0, P2, P3],
            P2 => [P0, P1, P3],
            P3 => [P0, P1, P2],
        }
    }
}

impl From<Player> for u32 {
    fn from(value: Player) -> Self {
        match value {
            Player::P0 => 0,
            Player::P1 => 1,
            Player::P2 => 2,
            Player::P3 => 3,
        }
    }
}

impl TryFrom<usize> for Player {
    type Error = ();

    fn try_from(value: usize) -> Result<Self, Self::Error> {
        match value {
            0 => Ok(Player::P0),
            1 => Ok(Player::P1),
            2 => Ok(Player::P2),
            3 => Ok(Player::P3),
            _ => Err(()),
        }
    }
}