treaty -


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use mockall::mock;

use crate::{
    any::{AnyTrait, IndirectLtAny, LtTypeId, Mut, Ref},
    effect::{Effect, Future},
    mock::{ContextLock, StaticTypeMap},
    protocol::Visitor,
    Builder, BuilderTypes,
};

use self::__mock_MockBuilder::__from_seed::Context;

use super::ContextGuard;

use crate::any::ForAnyTypeId;

mock! {
    pub Builder<Seed: 'static, Value: 'static, Error: 'static> {
        pub fn from_seed(seed: Seed) -> Self;
        pub fn build(self) -> Result<Value, Error>;

        pub fn traits(&self, id: ForAnyTypeId) -> &Option<Box<dyn for<'ctx> AnyTrait<'ctx> + Send>>;
        pub fn traits_mut(&mut self, id: ForAnyTypeId) -> &mut Option<Box<dyn for<'ctx> AnyTrait<'ctx> + Send>>;
    }
}

impl<Seed: Send, Value: Send, Error: Send> BuilderTypes for MockBuilder<Seed, Value, Error> {
    type Seed = Seed;

    type Error = Error;

    type Value = Value;
}

impl<Seed: 'static, Value: 'static, Error: 'static> MockBuilder<Seed, Value, Error> {
    pub fn lock_from_seed_context<'a>() -> ContextGuard<'a, Context<Seed, Value, Error>> {
        static LOCKS: StaticTypeMap = StaticTypeMap::new();

        LOCKS
            .get_or_init(|| {
                ContextLock::new(MockBuilder::from_seed_context(), |context| {
                    context.checkpoint()
                })
            })
            .lock()
    }
}

impl<'ctx, Seed: Send, Value: Send, Error: Send, E: Effect<'ctx>> Builder<'ctx, E>
    for MockBuilder<Seed, Value, Error>
{
    #[track_caller]
    fn from_seed<'a>(seed: Self::Seed) -> Future<'a, 'ctx, Self, E>
    where
        Self: 'a,
    {
        E::ready(Self::from_seed(seed))
    }

    #[track_caller]
    fn build<'a>(self) -> Future<'a, 'ctx, Result<Self::Value, Self::Error>, E>
    where
        Self: 'a,
    {
        E::ready(self.build())
    }

    #[track_caller]
    fn as_visitor(&mut self) -> Visitor<'_, 'ctx> {
        self
    }
}

impl<'ctx, Seed, Value, Error> AnyTrait<'ctx> for MockBuilder<Seed, Value, Error> {
    #[track_caller]
    fn upcast_to_id<'a>(&'a self, id: LtTypeId<'ctx>) -> Option<IndirectLtAny<'a, 'ctx, Ref>>
    where
        'ctx: 'a,
    {
        // Find the first trait handler that wants to upcast.
        self.traits(id.as_type_id())
            .as_ref()
            .and_then(|t| t.upcast_to_id(id))
    }

    #[track_caller]
    fn upcast_to_id_mut<'a: 'b, 'b>(
        &'a mut self,
        id: LtTypeId<'ctx>,
    ) -> Option<IndirectLtAny<'b, 'ctx, Mut>>
    where
        'ctx: 'a,
    {
        // Find the first trait handler that wants to upcast.
        self.traits_mut(id.as_type_id())
            .as_mut()
            .and_then(|t| t.upcast_to_id_mut(id))
    }
}