use crate::app_interface::list::ImmutableList;
use crate::app_interface::{ImmutableStatisticSet, StringKey};
use alloc::rc::Rc;
use alloc::vec::Vec;
use core::any::Any;

#[repr(u8)]
#[derive(Eq, PartialEq, Debug)]
pub enum Gender {
    Male = 0,
    Female = 1,
    Genderless = 2,
}

pub trait FormTrait {
    fn name(&self) -> StringKey;
    fn height(&self) -> f32;
    fn weight(&self) -> f32;
    fn base_experience(&self) -> u32;
    fn base_stats(&self) -> ImmutableStatisticSet;
    fn abilities(&self) -> ImmutableList<Rc<StringKey>>;
    fn hidden_abilities(&self) -> ImmutableList<Rc<StringKey>>;
    fn types(&self) -> &Vec<u8>;
    fn has_flag(&self, flag: &str) -> bool;

    fn as_any(&self) -> &dyn Any;
}

pub trait SpeciesTrait {
    /// The national dex identifier of the Pokemon.
    fn id(&self) -> u16;
    /// The name of the Pokemon species.
    fn name(&self) -> StringKey;
    /// The chance between 0.0 and 1.0 that a Pokemon is female.
    fn gender_rate(&self) -> f32;
    /// How much experience is required for a level.
    fn growth_rate(&self) -> StringKey;
    /// How hard it is to capture a Pokemon. 255 means this will be always caught, 0 means this is
    /// uncatchable.
    fn capture_rate(&self) -> u8;
    fn get_form(&self, form_name: &str) -> Option<Form>;
    fn has_flag(&self, flag: &str) -> bool;

    fn as_any(&self) -> &dyn Any;
}

pub type Form = Rc<dyn FormTrait>;
pub type Species = Rc<dyn SpeciesTrait>;

#[cfg(not(feature = "mock_data"))]
mod implementation {
    use super::*;
    use crate::app_interface::list::ImmutableListWasm;
    use crate::app_interface::{get_hash, ImmutableStatisticSetImpl};
    use crate::handling::cached_value::CachedValue;
    use crate::handling::extern_ref::{ExternRef, ExternalReferenceType, VecExternRef};
    use crate::handling::ffi_array::FFIArray;
    use crate::handling::Cacheable;
    use crate::{cached_value, cached_value_getters};
    use spin::RwLock;

    struct FormInner {
        reference: ExternRef<FormImpl>,
        name: CachedValue<StringKey>,
        height: CachedValue<f32>,
        weight: CachedValue<f32>,
        types: CachedValue<Vec<u8>>,
        base_experience: CachedValue<u32>,
        base_stats: CachedValue<ImmutableStatisticSet>,
        abilities: CachedValue<ImmutableList<Rc<StringKey>>>,
        hidden_abilities: CachedValue<ImmutableList<Rc<StringKey>>>,
        // moves: CachedValue<LearnableMoves>,
    }

    #[derive(Clone)]
    pub struct FormImpl {
        inner: Rc<FormInner>,
    }

    impl FormImpl {
        pub(crate) fn new(reference: ExternRef<Self>) -> Self {
            Self::from_ref(reference, &|reference| Self {
                inner: Rc::new(FormInner {
                    reference,
                    name: cached_value!({ form_get_name(reference).get_value().unwrap() }),
                    height: cached_value!({ form_get_height(reference) }),
                    weight: cached_value!({ form_get_weight(reference) }),
                    types: cached_value!({
                        let raw = form_get_types(reference);
                        Vec::from_raw_parts(raw.ptr(), raw.len(), raw.len())
                    }),
                    base_experience: cached_value!({ form_get_base_experience(reference) }),
                    base_stats: cached_value!({
                        Rc::new(form_get_base_stats(reference).get_value().unwrap())
                    }),
                    abilities: cached_value!({
                        Rc::new(
                            crate::app_interface::list::StringKeyImmutableList::from_ref(
                                form_get_abilities(reference),
                            ),
                        )
                    }),
                    hidden_abilities: cached_value!({
                        Rc::new(
                            crate::app_interface::list::StringKeyImmutableList::from_ref(
                                form_get_hidden_abilities(reference),
                            ),
                        )
                    }),
                }),
            })
        }

        pub(crate) fn reference(&self) -> ExternRef<Self> {
            self.inner.reference
        }
    }

    impl FormTrait for FormImpl {
        cached_value_getters! {
            fn name(&self) -> StringKey;
            fn height(&self) -> f32;
            fn weight(&self) -> f32;
            fn base_experience(&self) -> u32;
            fn base_stats(&self) -> ImmutableStatisticSet;
            fn abilities(&self) -> ImmutableList<Rc<StringKey>>;
            fn hidden_abilities(&self) -> ImmutableList<Rc<StringKey>>;
        }
        fn types(&self) -> &Vec<u8> {
            self.inner.types.value_ref()
        }

        fn has_flag(&self, flag: &str) -> bool {
            let hash = get_hash(flag);
            unsafe { form_has_flag_by_hash(self.inner.reference, hash) }
        }

        fn as_any(&self) -> &dyn Any {
            self
        }
    }

    pub struct SpeciesInner {
        reference: ExternRef<SpeciesImpl>,
        id: CachedValue<u16>,
        name: CachedValue<StringKey>,
        gender_rate: CachedValue<f32>,
        growth_rate: CachedValue<StringKey>,
        capture_rate: CachedValue<u8>,
        forms: RwLock<hashbrown::HashMap<u32, Option<Form>>>,
    }

    #[derive(Clone)]
    pub struct SpeciesImpl {
        inner: Rc<SpeciesInner>,
    }

    impl SpeciesImpl {
        pub(crate) fn new(reference: ExternRef<SpeciesImpl>) -> Self {
            Self {
                inner: Rc::new(SpeciesInner {
                    reference,
                    id: cached_value!({ species_get_id(reference) }),
                    name: cached_value!({ species_get_name(reference).get_value().unwrap() }),
                    gender_rate: cached_value!({ species_get_gender_rate(reference) }),
                    growth_rate: cached_value!({
                        species_get_growth_rate(reference).get_value().unwrap()
                    }),
                    capture_rate: cached_value!({ species_get_capture_rate(reference) }),
                    forms: Default::default(),
                }),
            }
        }

        pub(crate) fn reference(&self) -> ExternRef<Self> {
            self.inner.reference
        }
    }

    impl SpeciesTrait for SpeciesImpl {
        cached_value_getters! {
            /// The national dex identifier of the Pokemon.
            fn id(&self) -> u16;
            /// The name of the Pokemon species.
            fn name(&self) -> StringKey;
            /// The chance between 0.0 and 1.0 that a Pokemon is female.
            fn gender_rate(&self) -> f32;
            /// How much experience is required for a level.
            fn growth_rate(&self) -> StringKey;
            /// How hard it is to capture a Pokemon. 255 means this will be always caught, 0 means this is
            /// uncatchable.
            fn capture_rate(&self) -> u8;
        }

        fn get_form(&self, form_name: &str) -> Option<Form> {
            let hash = get_hash(form_name);
            unsafe {
                if let Some(v) = self.inner.forms.read().get(&hash) {
                    v.clone()
                } else {
                    let r = species_get_form_by_hash(self.inner.reference, hash);
                    let value = r.get_value();
                    let value: Option<Form> = if let Some(value) = value {
                        Some(Rc::new(value))
                    } else {
                        None
                    };
                    self.inner.forms.write().insert(hash, value.clone());
                    value
                }
            }
        }

        fn has_flag(&self, flag: &str) -> bool {
            let hash = get_hash(flag);
            unsafe { species_has_flag_by_hash(self.inner.reference, hash) }
        }

        fn as_any(&self) -> &dyn Any {
            self
        }
    }

    impl ExternalReferenceType for FormImpl {
        fn from_extern_value(reference: ExternRef<Self>) -> Self {
            Self::new(reference)
        }
    }

    impl ExternalReferenceType for SpeciesImpl {
        fn from_extern_value(reference: ExternRef<Self>) -> Self {
            Self::new(reference)
        }
    }

    crate::handling::cacheable::cacheable!(FormImpl);
    crate::handling::cacheable::cacheable!(SpeciesImpl);

    extern "wasm" {
        fn form_get_name(r: ExternRef<FormImpl>) -> ExternRef<StringKey>;
        fn form_get_height(r: ExternRef<FormImpl>) -> f32;
        fn form_get_weight(r: ExternRef<FormImpl>) -> f32;
        fn form_get_types(r: ExternRef<FormImpl>) -> FFIArray<u8>;
        fn form_get_base_experience(r: ExternRef<FormImpl>) -> u32;
        fn form_get_base_stats(r: ExternRef<FormImpl>) -> ExternRef<ImmutableStatisticSetImpl>;
        fn form_get_abilities(r: ExternRef<FormImpl>) -> VecExternRef<StringKey>;
        fn form_get_hidden_abilities(r: ExternRef<FormImpl>) -> VecExternRef<StringKey>;
        fn form_has_flag_by_hash(r: ExternRef<FormImpl>, hash: u32) -> bool;

        fn species_get_id(r: ExternRef<SpeciesImpl>) -> u16;
        fn species_get_name(r: ExternRef<SpeciesImpl>) -> ExternRef<StringKey>;
        fn species_get_gender_rate(r: ExternRef<SpeciesImpl>) -> f32;
        fn species_get_growth_rate(r: ExternRef<SpeciesImpl>) -> ExternRef<StringKey>;
        fn species_get_capture_rate(r: ExternRef<SpeciesImpl>) -> u8;
        fn species_get_form_by_hash(r: ExternRef<SpeciesImpl>, hash: u32) -> ExternRef<FormImpl>;
        fn species_has_flag_by_hash(r: ExternRef<SpeciesImpl>, flag_hash: u32) -> bool;
    }
}

#[cfg(not(feature = "mock_data"))]
pub use implementation::*;