use windows::{Foundation::*, Win32::System::Com::*, core::*};

#[implement(IClassFactory)]
struct Factory;

impl IClassFactory_Impl for Factory_Impl {
    fn CreateInstance(
        &self,
        _: Ref<IUnknown>,
        iid: *const GUID,
        interface: *mut *mut core::ffi::c_void,
    ) -> Result<()> {
        unsafe {
            let unknown: IUnknown = Stringable.into();
            unknown.query(iid, interface).ok()
        }
    }

    fn LockServer(&self, _: BOOL) -> Result<()> {
        Ok(())
    }
}

#[implement(IStringable)]
struct Stringable;

impl IStringable_Impl for Stringable_Impl {
    fn ToString(&self) -> Result<HSTRING> {
        Ok("Stringable".into())
    }
}

const CLSID_SAMPLE: GUID = GUID::from_u128(0x58d39529_4975_4440_b7a6_6d71bfb59559);

fn main() -> Result<()> {
    unsafe {
        CoIncrementMTAUsage()?;
        let factory: IClassFactory = Factory.into();

        CoRegisterClassObject(
            &CLSID_SAMPLE,
            &factory,
            CLSCTX_LOCAL_SERVER,
            REGCLS_AGILE | REGCLS_MULTIPLEUSE,
        )?;

        println!("Press key to end server...");
        getchar();
        Ok(())
    }
}

unsafe extern "C" {
    pub fn getchar() -> i32;
}

use windows::{Foundation::*, Win32::System::Com::*, core::*};

const CLSID_SAMPLE: GUID = GUID::from_u128(0x58d39529_4975_4440_b7a6_6d71bfb59559);

fn main() -> Result<()> {
    unsafe {
        CoIncrementMTAUsage()?;

        let stringable: IStringable = CoCreateInstance(&CLSID_SAMPLE, None, CLSCTX_LOCAL_SERVER)?;
        println!("client: {}", stringable.ToString()?);

        Ok(())
    }
}