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//! Surface Rotozoomer

use libc::c_int;
use ::surface::Surface;
use ::get_error;
pub use std::f64::consts::PI;
use sys::gfx::rotozoom;


/// `RotozoomSurface` for work with rust-sdl2 Surface type
pub trait RotozoomSurface {
    /// Rotates and zooms a surface and optional anti-aliasing.
    fn rotozoom(&self, angle: f64, zoom: f64, smooth: bool) -> Result<Surface, String>;
    /// Rotates and zooms a surface with different horizontal and vertical scaling factors and optional anti-aliasing.
    fn rotozoom_xy(&self, angle: f64, zoomx: f64, zoomy: f64, smooth: bool) -> Result<Surface, String>;
    /// Zoom a surface by independent horizontal and vertical factors with optional smoothing.
    fn zoom(&self, zoomx: f64, zoomy: f64, smooth: bool) -> Result<Surface, String>;
    /// Shrink a surface by an integer ratio using averaging.
    fn shrink(&self, factorx: i32, factory: i32) -> Result<Surface, String>;
    /// Rotates a 8/16/24/32 bit surface in increments of 90 degrees.
    fn rotate_90deg(&self, turns: i32) -> Result<Surface, String>;
}

impl<'a> RotozoomSurface for Surface<'a> {
    fn rotozoom(&self, angle: f64, zoom: f64, smooth: bool) -> Result<Surface, String> {
        let raw = unsafe {
            rotozoom::rotozoomSurface(self.raw(), angle, zoom, smooth as c_int)
        };
        if (raw as *mut ()).is_null() {
            Err(get_error())
        } else {
            unsafe { Ok(Surface::from_ll(raw)) }
        }
    }
    fn rotozoom_xy(&self, angle: f64, zoomx: f64, zoomy: f64, smooth: bool) -> Result<Surface, String> {
        let raw = unsafe {
            rotozoom::rotozoomSurfaceXY(self.raw(), angle, zoomx, zoomy, smooth as c_int)
        };
        if (raw as *mut ()).is_null() {
            Err(get_error())
        } else {
            unsafe { Ok(Surface::from_ll(raw)) }
        }
    }
    fn zoom(&self, zoomx: f64, zoomy: f64, smooth: bool) -> Result<Surface, String> {
        let raw = unsafe {
            rotozoom::zoomSurface(self.raw(), zoomx, zoomy, smooth as c_int)
        };
        if (raw as *mut ()).is_null() {
            Err(get_error())
        } else {
            unsafe { Ok(Surface::from_ll(raw)) }
        }
    }
    fn shrink(&self, factorx: i32, factory: i32) -> Result<Surface, String> {
        let raw = unsafe {
            rotozoom::shrinkSurface(self.raw(), factorx as c_int, factory as c_int)
        };
        if (raw as *mut ()).is_null() {
            Err(get_error())
        } else {
            unsafe { Ok(Surface::from_ll(raw)) }
        }
    }
    fn rotate_90deg(&self, turns: i32) -> Result<Surface, String> {
        let raw = unsafe {
            rotozoom::rotateSurface90Degrees(self.raw(), turns as c_int)
        };
        if (raw as *mut ()).is_null() {
            Err(get_error())
        } else {
            unsafe { Ok(Surface::from_ll(raw)) }
        }
    }
}

pub fn get_zoom_size(width: i32, height: i32, zoomx: f64, zoomy: f64) -> (i32, i32) {
    let mut w: c_int = 0;
    let mut h: c_int = 0;
    unsafe { rotozoom::zoomSurfaceSize(width as c_int, height as c_int, zoomx, zoomy, &mut w, &mut h) }
    (w as i32, h as i32)
}

pub fn get_rotozoom_size(width: i32, height: i32, angle: f64, zoom: f64) -> (i32, i32) {
    let mut w: c_int = 0;
    let mut h: c_int = 0;
    unsafe { rotozoom::rotozoomSurfaceSize(width as c_int, height as c_int, angle, zoom, &mut w, &mut h) }
    (w as i32, h as i32)
}

pub fn get_rotozoom_xy_size(width: i32, height: i32, angle: f64, zoomx: f64, zoomy: f64) -> (i32, i32) {
    let mut w: c_int = 0;
    let mut h: c_int = 0;
    unsafe { rotozoom::rotozoomSurfaceSizeXY(width as c_int, height as c_int, angle, zoomx, zoomy, &mut w, &mut h) }
    (w as i32, h as i32)
}