treaty -


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use mockall::{predicate::eq, Sequence};
use treaty::{
    any::{OwnedStatic, TypeNameId},
    effect::{BlockOn, Blocking, Effect, Future, Spin},
    protocol::{
        visitor::{TagConst, TagProto, ValueProto},
        Visitor,
    },
    walkers::core::{
        r#struct::{StructTypeInfo, StructWalker},
        value::ValueWalker,
    },
    Builder, DefaultMode, Flow, Walker, TAG_STRUCT, TAG_TYPE_NAME,
};

use crate::common::{
    builder::MockBuilder,
    protocol::{tag::MockTagVisitor, visitor::MockValueVisitor},
};

struct Demo {
    a: bool,
    b: bool,
}

impl<'ctx, M> StructTypeInfo<'ctx, M> for Demo {
    const NAME: &'static str = "Demo";

    const FIELDS: &'static [&'static str] = &["a", "b"];

    type FieldError = ();

    type T = Demo;

    fn walk_field<'a, E: Effect>(
        index: usize,
        value: &'ctx Self::T,
        visitor: Visitor<'a, 'ctx>,
    ) -> Future<'a, Result<Flow, Self::FieldError>, E> {
        E::wrap(async move {
            match index {
                0 => {
                    let walker = ValueWalker::<bool>::new(value.a);
                    Walker::<E>::walk(walker, visitor).await.unwrap();
                    Ok(Flow::Continue)
                }
                1 => {
                    let walker = ValueWalker::<bool>::new(value.b);
                    Walker::<E>::walk(walker, visitor).await.unwrap();
                    Ok(Flow::Continue)
                }
                _ => Ok(Flow::Done),
            }
        })
    }
}

#[test]
fn demo2() {
    let mut builder = MockBuilder::<(), (), ()>::new();

    let mut seq = Sequence::new();

    builder
        .expect_traits_mut()
        .times(4)
        .in_sequence(&mut seq)
        .return_var(None);

    builder
        .expect_traits_mut()
        .once()
        .with(eq(TypeNameId::of::<
            TagProto<TagConst<{ TAG_STRUCT.to_int() }>, Blocking>,
        >()))
        .in_sequence(&mut seq)
        .return_var(Some(Box::new({
            let mut mock = MockTagVisitor::<TagConst<{ TAG_STRUCT.to_int() }>, Blocking>::new();

            mock.expect_visit().once().returning(|_, walker| {
                let mut builder = MockBuilder::<(), (), ()>::new();
                assert_eq!(
                    Spin::block_on(walker.walk(Builder::<Blocking>::as_visitor(&mut builder))),
                    Flow::Done
                );

                Flow::Continue.into()
            });

            mock
        })));

    builder
        .expect_traits_mut()
        .once()
        .with(eq(TypeNameId::of::<
            TagProto<TagConst<{ TAG_TYPE_NAME.to_int() }>, Blocking>,
        >()))
        .in_sequence(&mut seq)
        .return_var(Some(Box::new({
            let mut mock = MockTagVisitor::<TagConst<{ TAG_TYPE_NAME.to_int() }>, Blocking>::new();

            mock.expect_visit().return_once(|_, walker| {
                let mut builder = MockBuilder::<(), (), ()>::new();

                builder
                    .expect_traits_mut()
                    .once()
                    .with(eq(TypeNameId::of::<
                        ValueProto<OwnedStatic<&'static str>, Blocking>,
                    >()))
                    .return_var(Some(Box::new({
                        let mut mock =
                            MockValueVisitor::<OwnedStatic<&'static str>, Blocking>::new();

                        mock.expect_visit()
                            .once()
                            .with(eq(OwnedStatic("Demo")))
                            .return_const(Flow::Done);

                        mock
                    })));

                assert_eq!(
                    Spin::block_on(walker.walk(Builder::<Blocking>::as_visitor(&mut builder))),
                    Flow::Done
                );

                Flow::Continue.into()
            });

            mock
        })));

    builder
        .expect_traits_mut()
        .times(3)
        .in_sequence(&mut seq)
        .return_var(None);

    let value = Demo { a: true, b: false };

    let walker = StructWalker::<Demo, Demo, DefaultMode, Blocking>::new(&value);

    Spin::block_on(walker.walk(Builder::<Blocking>::as_visitor(&mut builder))).unwrap();
}