// C‑ABI shim (PoC). These functions are no‑ops for 20.36/20.37.
// Kept tiny and isolated. Linkage names match include/nyrt.h.

#[no_mangle]
pub extern "C" fn nyrt_init() -> i32 { 0 }

#[no_mangle]
pub extern "C" fn nyrt_teardown() { }

#[no_mangle]
pub extern "C" fn nyrt_load_mir_json(_json_text: *const ::std::os::raw::c_char) -> u64 { 1 }

#[no_mangle]
pub extern "C" fn nyrt_exec_main(_module_handle: u64) -> i32 { 0 }

#[no_mangle]
pub extern "C" fn nyrt_hostcall(
    _name: *const ::std::os::raw::c_char,
    _method: *const ::std::os::raw::c_char,
    _payload_json: *const ::std::os::raw::c_char,
    _out_buf: *mut ::std::os::raw::c_char,
    _out_buf_len: u32,
) -> i32 { 0 }

#[cfg(test)]
mod tests {
    use super::*;
    use std::ffi::CString;

    #[test]
    fn load_and_exec_noop_returns_zero() {
        // init/teardown are no-ops but should stay callable
        assert_eq!(unsafe { nyrt_init() }, 0);

        let json = CString::new("{}").expect("CString");
        let handle = unsafe { nyrt_load_mir_json(json.as_ptr()) };
        assert_eq!(handle, 1);

        assert_eq!(unsafe { nyrt_exec_main(handle) }, 0);

        // ensure teardown does not panic even when called after exec
        unsafe { nyrt_teardown() };
    }
}