use anyhow::Result;

wit_bindgen_wasmtime::export!("./tests/runtime/records/imports.wit");

use imports::*;

#[derive(Default)]
pub struct MyImports;

impl Imports for MyImports {
    fn multiple_results(&mut self) -> (u8, u16) {
        (4, 5)
    }

    fn swap_tuple(&mut self, a: (u8, u32)) -> (u32, u8) {
        (a.1, a.0)
    }

    fn roundtrip_flags1(&mut self, a: F1) -> F1 {
        drop(a.to_string());
        drop(format!("{:?}", a));
        drop(a & F1::all());
        a
    }

    fn roundtrip_flags2(&mut self, a: F2) -> F2 {
        a
    }

    fn roundtrip_flags3(
        &mut self,
        a: Flag8,
        b: Flag16,
        c: Flag32,
        d: Flag64,
    ) -> (Flag8, Flag16, Flag32, Flag64) {
        (a, b, c, d)
    }

    fn roundtrip_record1(&mut self, a: R1) -> R1 {
        drop(format!("{:?}", a));
        a
    }

    fn tuple0(&mut self, _: ()) {}

    fn tuple1(&mut self, a: (u8,)) -> (u8,) {
        (a.0,)
    }
}

wit_bindgen_wasmtime::import!("./tests/runtime/records/exports.wit");

fn run(wasm: &str) -> Result<()> {
    use exports::*;

    let (exports, mut store) = crate::instantiate(
        wasm,
        |linker| imports::add_to_linker(linker, |cx| -> &mut MyImports { &mut cx.imports }),
        |store, module, linker| Exports::instantiate(store, module, linker, |cx| &mut cx.exports),
    )?;

    exports.test_imports(&mut store)?;
    assert_eq!(exports.multiple_results(&mut store,)?, (100, 200));
    assert_eq!(exports.swap_tuple(&mut store, (1u8, 2u32))?, (2u32, 1u8));
    assert_eq!(exports.roundtrip_flags1(&mut store, F1::A)?, F1::A);
    assert_eq!(
        exports.roundtrip_flags1(&mut store, F1::empty())?,
        F1::empty()
    );
    assert_eq!(exports.roundtrip_flags1(&mut store, F1::B)?, F1::B);
    assert_eq!(
        exports.roundtrip_flags1(&mut store, F1::A | F1::B)?,
        F1::A | F1::B
    );

    assert_eq!(exports.roundtrip_flags2(&mut store, F2::C)?, F2::C);
    assert_eq!(
        exports.roundtrip_flags2(&mut store, F2::empty())?,
        F2::empty()
    );
    assert_eq!(exports.roundtrip_flags2(&mut store, F2::D)?, F2::D);
    assert_eq!(
        exports.roundtrip_flags2(&mut store, F2::C | F2::E)?,
        F2::C | F2::E
    );

    let r = exports.roundtrip_record1(
        &mut store,
        R1 {
            a: 8,
            b: F1::empty(),
        },
    )?;
    assert_eq!(r.a, 8);
    assert_eq!(r.b, F1::empty());

    let r = exports.roundtrip_record1(
        &mut store,
        R1 {
            a: 0,
            b: F1::A | F1::B,
        },
    )?;
    assert_eq!(r.a, 0);
    assert_eq!(r.b, F1::A | F1::B);

    assert_eq!(exports.tuple0(&mut store, ())?, ());
    assert_eq!(exports.tuple1(&mut store, (1,))?, (1,));
    Ok(())
}
