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use ::context::Context; 

pub struct Window {
    /// the height of the window in characters
    height: u64,
    /// the width of the window in characters
    width: u64,
    /// the x-coordinate that the window starts at
    x: u64,
    /// the y-coordinate that the window starts at
    y: u64,
    /// the pointer to the actual window in memory
    pub ptr: *const u64 
}

#[link(name="ncurses")]
extern {
    fn newwin(lines: u64, cols: u64, x: u64, y: u64) -> *const u64;
    fn delwin(ptr: *const u64);
    fn wrefresh(ptr: *const u64);
}

impl Window {
    /// Create a window and add it to the specified windowing context
    /// # Arguments
    ///
    /// * `name` - the name to register the window under
    /// * `height` - the height of the window
    /// * `width` - the width of the window
    /// * `x` - the starting x coordinate
    /// * `y` - the starting y coordinate
    /// * `context` - the ncurses context to create a window for
    pub fn create_win(name: String, height:u64, width:u64, x:u64, y:u64, context: &mut Context) {
        unsafe { 
            // get the pointer from ncurses
            let ptr = newwin(height, width, x, y); 
            // refresh the window to allow unbuffered output
            wrefresh(ptr);
            // add the window to the context for usage
            context.win.insert(name.clone(), Window { height, width, x, y, ptr} );
        }

    }
}

impl Drop for Window {
    /// Clean up the window by removing it
    fn drop(&mut self) {
        unsafe { delwin(self.ptr); }    
    }
}