use crate::app_interface::get_hash;
use crate::handling::cached_value::CachedValue;
use crate::handling::Cacheable;
use crate::{
    cached_value, cached_value_getters, ExternRef, ExternalReferenceType, FFIArray, ImmutableList,
    StringKey, VecExternRef,
};
use alloc::rc::Rc;
use alloc::vec::Vec;
use spin::RwLock;

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

#[repr(u8)]
pub enum Statistic {
    HP = 0,
    Attack = 1,
    Defense = 2,
    SpecialAttack = 3,
    SpecialDefense = 4,
    Speed = 5,
}

pub struct ImmutableStatisticSetInner {
    reference: ExternRef<ImmutableStatisticSet>,
    /// The health point stat value.
    hp: CachedValue<u16>,
    /// The physical attack stat value.
    attack: CachedValue<u16>,
    /// The physical defense stat value.
    defense: CachedValue<u16>,
    /// The special attack stat value.
    special_attack: CachedValue<u16>,
    /// The special defense stat value.
    special_defense: CachedValue<u16>,
    /// The speed stat value.
    speed: CachedValue<u16>,
}

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

impl ImmutableStatisticSet {
    #[cfg(not(feature = "mock_data"))]
    pub(crate) fn new(reference: ExternRef<Self>) -> Self {
        Self::from_ref(reference, &|reference| Self {
            inner: Rc::new(ImmutableStatisticSetInner {
                reference,
                hp: cached_value!({ static_statistics_set_get_hp(reference) }),
                attack: cached_value!({ static_statistics_set_get_attack(reference) }),
                defense: cached_value!({ static_statistics_set_get_defense(reference) }),
                special_attack: cached_value!({
                    static_statistics_set_get_special_attack(reference)
                }),
                special_defense: cached_value!({
                    static_statistics_set_get_special_defense(reference)
                }),
                speed: cached_value!({ static_statistics_set_get_speed(reference) }),
            }),
        })
    }

    pub fn hp(&self) -> u16 {
        self.inner.hp.value()
    }
    pub fn attack(&self) -> u16 {
        self.inner.attack.value()
    }
    pub fn defense(&self) -> u16 {
        self.inner.defense.value()
    }
    pub fn special_attack(&self) -> u16 {
        self.inner.special_attack.value()
    }
    pub fn special_defense(&self) -> u16 {
        self.inner.special_defense.value()
    }
    pub fn speed(&self) -> u16 {
        self.inner.speed.value()
    }
}

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

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

impl Form {
    #[cfg(not(feature = "mock_data"))]
    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!({ form_get_base_stats(reference).get_value().unwrap() }),
                abilities: cached_value!({ form_get_abilities(reference).get_immutable_list() }),
                hidden_abilities: cached_value!({
                    form_get_hidden_abilities(reference).get_immutable_list()
                }),
            }),
        })
    }

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

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

    #[cfg(not(feature = "mock_data"))]
    pub fn has_flag(&self, flag: &str) -> bool {
        let hash = get_hash(flag);
        unsafe { form_has_flag_by_hash(self.inner.reference, hash) }
    }
}

pub struct SpeciesInner {
    reference: ExternRef<Species>,
    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 Species {
    inner: Rc<SpeciesInner>,
}

impl Species {
    #[cfg(not(feature = "mock_data"))]
    pub(crate) fn new(reference: ExternRef<Species>) -> 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
    }

    cached_value_getters! {
        /// The national dex identifier of the Pokemon.
        pub fn id(&self) -> u16;
        /// The name of the Pokemon species.
        pub fn name(&self) -> StringKey;
        /// The chance between 0.0 and 1.0 that a Pokemon is female.
        pub fn gender_rate(&self) -> f32;
        /// How much experience is required for a level.
        pub 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.
        pub fn capture_rate(&self) -> u8;
    }

    #[cfg(not(feature = "mock_data"))]
    pub 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();
                self.inner.forms.write().insert(hash, value.clone());
                value
            }
        }
    }

    #[cfg(not(feature = "mock_data"))]
    pub fn has_flag(&self, flag: &str) -> bool {
        let hash = get_hash(flag);
        unsafe { species_has_flag_by_hash(self.inner.reference, hash) }
    }
}

#[cfg(not(feature = "mock_data"))]
impl ExternalReferenceType for ImmutableStatisticSet {
    fn from_extern_value(reference: ExternRef<Self>) -> Self {
        Self::new(reference)
    }
}

#[cfg(not(feature = "mock_data"))]
impl ExternalReferenceType for Form {
    fn from_extern_value(reference: ExternRef<Self>) -> Self {
        Self::new(reference)
    }
}

#[cfg(not(feature = "mock_data"))]
impl ExternalReferenceType for Species {
    fn from_extern_value(reference: ExternRef<Self>) -> Self {
        Self::new(reference)
    }
}

crate::handling::cacheable::cacheable!(ImmutableStatisticSet);
crate::handling::cacheable::cacheable!(Form);
crate::handling::cacheable::cacheable!(Species);

#[cfg(not(feature = "mock_data"))]
extern "wasm" {
    fn static_statistics_set_get_hp(r: ExternRef<ImmutableStatisticSet>) -> u16;
    fn static_statistics_set_get_attack(r: ExternRef<ImmutableStatisticSet>) -> u16;
    fn static_statistics_set_get_defense(r: ExternRef<ImmutableStatisticSet>) -> u16;
    fn static_statistics_set_get_special_attack(r: ExternRef<ImmutableStatisticSet>) -> u16;
    fn static_statistics_set_get_special_defense(r: ExternRef<ImmutableStatisticSet>) -> u16;
    fn static_statistics_set_get_speed(r: ExternRef<ImmutableStatisticSet>) -> u16;

    fn form_get_name(r: ExternRef<Form>) -> ExternRef<StringKey>;
    fn form_get_height(r: ExternRef<Form>) -> f32;
    fn form_get_weight(r: ExternRef<Form>) -> f32;
    fn form_get_types(r: ExternRef<Form>) -> FFIArray<u8>;
    fn form_get_base_experience(r: ExternRef<Form>) -> u32;
    fn form_get_base_stats(r: ExternRef<Form>) -> ExternRef<ImmutableStatisticSet>;
    fn form_get_abilities(r: ExternRef<Form>) -> VecExternRef<StringKey>;
    fn form_get_hidden_abilities(r: ExternRef<Form>) -> VecExternRef<StringKey>;
    fn form_has_flag_by_hash(r: ExternRef<Form>, hash: u32) -> bool;

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