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use crate::{make_case_elim, make_proj_elim};
use rand::{seq::SliceRandom, thread_rng};
use serde::{Deserialize, Serialize};
use strum::{Display, EnumString};

make_proj_elim!(
    body,
    #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
    pub struct Body {
        pub species: Species,
        pub body_type: BodyType,
    }
);

impl Body {
    pub fn random() -> Self {
        let mut rng = thread_rng();
        let species = *ALL_SPECIES.choose(&mut rng).unwrap();
        Self::random_with(&mut rng, &species)
    }

    #[inline]
    pub fn random_with(rng: &mut impl rand::Rng, &species: &Species) -> Self {
        let body_type = *ALL_BODY_TYPES.choose(rng).unwrap();
        Self { species, body_type }
    }
}

impl From<Body> for super::Body {
    fn from(body: Body) -> Self { super::Body::Crustacean(body) }
}

// Renaming any enum entries here (re-ordering is fine) will require a
// database migration to ensure pets correctly de-serialize on player login.
make_case_elim!(
    species,
    #[derive(
        Copy,
        Clone,
        Debug,
        Display,
        EnumString,
        PartialEq,
        Eq,
        PartialOrd,
        Ord,
        Hash,
        Serialize,
        Deserialize,
    )]
    #[repr(u32)]
    pub enum Species {
        Crab = 0,
        SoldierCrab = 1,
        Karkatha = 2,
    }
);

/// Data representing per-species generic data.
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct AllSpecies<SpeciesMeta> {
    pub crab: SpeciesMeta,
    pub soldier_crab: SpeciesMeta,
    pub karkatha: SpeciesMeta,
}

impl<'a, SpeciesMeta> core::ops::Index<&'a Species> for AllSpecies<SpeciesMeta> {
    type Output = SpeciesMeta;

    #[inline]
    fn index(&self, &index: &'a Species) -> &Self::Output {
        match index {
            Species::Crab => &self.crab,
            Species::SoldierCrab => &self.soldier_crab,
            Species::Karkatha => &self.karkatha,
        }
    }
}

pub const ALL_SPECIES: [Species; 3] = [Species::Crab, Species::SoldierCrab, Species::Karkatha];

impl<'a, SpeciesMeta: 'a> IntoIterator for &'a AllSpecies<SpeciesMeta> {
    type IntoIter = std::iter::Copied<std::slice::Iter<'static, Self::Item>>;
    type Item = Species;

    fn into_iter(self) -> Self::IntoIter { ALL_SPECIES.iter().copied() }
}

make_case_elim!(
    body_type,
    #[derive(
        Copy,
        Clone,
        Debug,
        Display,
        EnumString,
        PartialEq,
        Eq,
        PartialOrd,
        Ord,
        Hash,
        Serialize,
        Deserialize,
    )]
    #[repr(u32)]
    pub enum BodyType {
        Female = 0,
        Male = 1,
    }
);
pub const ALL_BODY_TYPES: [BodyType; 2] = [BodyType::Female, BodyType::Male];