use std::ffi::CStr;

use crate::{
    result::{Error, Result},
    FfiSlice, FfiSliceRef, FfiValueRef,
};

use super::{ObjectABI, VTable};

#[repr(C)]
pub struct Object {
    inner: (),
    vtable: &'static VTable<Object>,
}

impl ObjectABI for Object {
    type VTable = ObjectVTable;
}

pub struct ObjectVTable {
    pub object_kind: &'static CStr,
    pub to_str: unsafe extern "C" fn(this: FfiValueRef<Object>) -> FfiSlice<str>,
    pub from_str: unsafe extern "C" fn(from: FfiSliceRef<str>) -> Result<Object, Error>,
    pub home_uri: unsafe extern "C" fn(this: FfiValueRef<Object>) -> FfiSlice<str>,
}

impl ObjectVTable {
    pub fn new<O: IntoObjectVTable>() -> Self {
        todo!()
    }
}

pub trait IntoObjectVTable {
    fn object_kind() -> &'static CStr;
    unsafe extern "C" fn to_str(this: FfiValueRef<Object>) -> FfiSlice<str>;
    unsafe extern "C" fn from_str(from: FfiSliceRef<str>) -> Result<Object, Error>;
    unsafe extern "C" fn home_uri(this: FfiValueRef<Object>) -> FfiSlice<str>;
}