use std::sync::Arc;

use indexmap::IndexMap;

use crate::static_data::DataLibrary;
use crate::static_data::Species;
use crate::{StringKey, ValueIdentifiable, ValueIdentifier};

/// A library to store all data for Pokemon species.
#[derive(Debug)]
#[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
pub struct SpeciesLibrary {
    /// A unique identifier so we know what value this is.
    identifier: ValueIdentifier,
    /// The underlying map.
    map: IndexMap<StringKey, Arc<Species>>,
}

impl SpeciesLibrary {
    /// Instantiates a new Species Library.
    pub fn new(capacity: usize) -> SpeciesLibrary {
        SpeciesLibrary {
            identifier: Default::default(),
            map: IndexMap::with_capacity(capacity),
        }
    }
}

impl<'a> DataLibrary<'a, Species> for SpeciesLibrary {
    fn map(&self) -> &IndexMap<StringKey, Arc<Species>> {
        &self.map
    }
    fn get_modify(&mut self) -> &mut IndexMap<StringKey, Arc<Species>> {
        &mut self.map
    }
}

impl ValueIdentifiable for SpeciesLibrary {
    fn value_identifier(&self) -> ValueIdentifier {
        self.identifier
    }
}

#[cfg(test)]
pub mod tests {
    use hashbrown::HashSet;
    use std::sync::Arc;

    use crate::static_data::libraries::data_library::DataLibrary;
    use crate::static_data::libraries::species_library::SpeciesLibrary;
    use crate::static_data::Form;
    use crate::static_data::LearnableMoves;
    use crate::static_data::Species;
    use crate::static_data::StaticStatisticSet;

    fn build_species() -> Species {
        Species::new(
            0,
            &"foo".into(),
            0.5,
            &"test_growthrate".into(),
            0,
            Arc::new(Form::new(
                &"default".into(),
                0.0,
                0.0,
                0,
                Vec::new(),
                StaticStatisticSet::default(),
                Vec::new(),
                Vec::new(),
                LearnableMoves::new(),
                HashSet::new(),
            )),
            HashSet::new(),
        )
    }

    pub fn build() -> SpeciesLibrary {
        let mut lib = SpeciesLibrary::new(1);
        let species = build_species();
        // Borrow as mut so we can insert
        let w = &mut lib;
        w.add(&"foo".into(), Arc::new(species));
        // Drops borrow as mut

        lib
    }

    #[test]
    fn add_species_to_library_and_fetch() {
        let lib = build();

        // Borrow as read so we can read
        let r = &lib;
        let mon = r.get(&"foo".into());
        assert!(mon.is_some());
        assert_eq!(mon.unwrap().id(), 0_u16);
        assert_eq!(mon.unwrap().as_ref().name(), &"foo".into());
        assert_eq!(r.len(), 1);
    }

    #[test]
    fn add_species_to_library_then_remove() {
        let mut lib = build();

        lib.remove(&"foo".into());

        // Borrow as read so we can read
        let r = &lib;
        let mon = r.get(&"foo".into());
        assert!(mon.is_none());
        assert_eq!(r.len(), 0);
    }
}