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use num_enum::{FromPrimitive, IntoPrimitive};

#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};

#[cfg(feature = "strum")]
use strum::{Display, EnumCount, EnumIter, IntoStaticStr, VariantNames};

/// Whether the agent is an ally or enemy.
///
/// *Arc calls this "iff" for if friend/foe.*
#[derive(
    Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, IntoPrimitive, FromPrimitive,
)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(
    feature = "strum",
    derive(Display, EnumCount, EnumIter, IntoStaticStr, VariantNames)
)]
#[repr(u8)]
pub enum Affinity {
    /// Allied agent.
    Friend = 0,

    /// Enemy agent.
    Foe = 1,

    /// Unknown affinity between agents.
    Unknown,

    /// Invalid.
    #[num_enum(catch_all)]
    Invalid(u8),
}