use std::ffi::{c_char,CString};

#[repr(C)]
pub struct Color(pub u8, pub u8, pub u8, pub u8);

#[link(name = "raylib")]
extern {
    fn InitWindow(width: u32, height: u32, title: *const c_char);
    fn WindowShouldClose() -> bool;
    fn BeginDrawing();
    fn EndDrawing();
    fn DrawRectangle(pos_x: u32, pos_y: u32, width: u32, height: u32, color: Color);
    fn IsKeyPressed(key: u32) -> bool;
}

#[derive(Copy, Clone)]
pub enum Key {
    Z = 89,
}

pub fn init_window(width: u32, height: u32, title: &str) {
    unsafe { 
        let title = CString::new(title).unwrap();
        InitWindow(width, height, title.as_ptr()); 
    }
}

pub fn window_should_close() -> bool {
    unsafe { WindowShouldClose() }
}

pub fn begin_drawing() {
    unsafe { BeginDrawing(); }
}

pub fn end_drawing() {
    unsafe { EndDrawing(); }
}

pub fn draw_rect(pos_x: u32, pos_y: u32, width:u32, height: u32, color: Color) {
    unsafe { DrawRectangle(pos_x, pos_y, width, height, color); }
}

pub fn is_key_pressed(key: Key) -> bool {
    let key = key as u32;
    unsafe { 
        let ret = IsKeyPressed(key);
        if ret {
            println!("is_key_pressed({key})");
        }
        ret
    }
}