pub mod cairo {
    pub struct Context();
    impl Drop for Context {
        fn drop(&mut self) {
            println!("Dropping cairo::Context");
        }
    }
}

pub struct Surface<'a> {
    //this: cairo::ImageSurface,
    data: std::marker::PhantomData<&'a mut [u8]>,
    pub dimensions: (i32, i32),
    pub scale: i32,
}

impl<'a> Surface<'a> {
    // XXX: Should we really hardcode the cairo::Format?
    pub fn new(data: &mut [u8], dimensions: (i32, i32), scale: i32) -> Result<Surface, ()> {
        /*let this = unsafe {
            cairo::ImageSurface::create_for_data::<&mut [u8]>(
                core::mem::transmute(data),
                cairo::Format::ARgb32,
                scale * dimensions.0,
                scale * dimensions.1,
                scale * dimensions.0 * 4,
            )?
        };*/

        Ok(Surface{
            //this: this,
            data: std::marker::PhantomData,
            dimensions: dimensions,
            scale: scale,
        })
    }

    pub fn make_context(&self) -> Context {
        Context::new(self)
    }
}

impl<'a> Drop for Surface<'a> {
    fn drop(&mut self) {
        /*let pointer = self.this.to_raw_none();
        unsafe {
            let count = cairo_sys::cairo_surface_get_reference_count(pointer);

            assert_eq!(count, 1, "multiple C references to surface remaining");
            drop(cairo::Surface::from_raw_none(pointer));
        }*/
        println!("Do stuff");
    }
}

pub struct Context<'a> {
    pub this: cairo::Context,
    surface: std::marker::PhantomData<&'a Surface<'a>>,
}

impl<'a> Context<'a> {
    fn new(surface: &'a Surface) -> Context<'a> {
        //let this = cairo::Context::new(&surface.this);
        //this.scale(surface.scale.into(), surface.scale.into());

        Context {
            this: cairo::Context(),
            surface: std::marker::PhantomData,
        }
    }
}

fn main() {
    let mut buf = [0; 4];
    let context: Context;
    {
        let surface = Surface::new(&mut buf, (32, 32), 1).expect("failed to create Cairo surface");
        context = surface.make_context();

        //context.this.set_source_rgba(0.16, 0.16, 0.16, 0.50);
        //context.this.rectangle(0.0, 0.0, 32.0, 32.0);
        //context.this.fill();
    }
}