use crate::canvas::{Drawable, CanvasTextureHandle, CanvasImageHandle};
use std::sync::Arc;

#[derive(Debug, Clone)]
pub struct Sprite {

    pub vertices: [(f32, f32); 6],
    pub ti_position: [(f32, f32); 6],

    position: (f32, f32),
    size: (f32, f32),
    color: (f32, f32, f32, f32),

    textured: bool,
    texture_handle: Option<Arc<CanvasTextureHandle>>,

}

impl Sprite {

    pub fn new(position: (f32, f32), size: (f32, f32)) -> Sprite {
        Sprite::new_with_color(position, size, (0.,0.,0.,0.))
    }

    pub fn new_with_color(position: (f32, f32),
                          size: (f32, f32),
                          color: (f32, f32, f32, f32)) -> Sprite {

        let fsize = (size.0 as f32, size.1 as f32);

        Sprite {
            vertices: [
                (position.0,  position.1 ),                    // top left
                (position.0,  position.1 + fsize.1),           // bottom left
                (position.0 + fsize.0, position.1 + fsize.1 ), // bottom right
                (position.0,  position.1 ),                    // top left
                (position.0 + fsize.0, position.1 + fsize.1 ), // bottom right
                (position.0 + fsize.0, position.1 ),           // top right
            ],

            position: position,
            ti_position: [
                (-1.0, -1.0),          // top left
                (-1.0,  1.0),          // bottom left
                ( 1.0,  1.0),          // bottom right
                (-1.0, -1.0),          // top left
                ( 1.0,  1.0),          // bottom right
                ( 1.0, -1.0),          // top right
            ],
            size: size,
            color: color,
            textured: false,
            texture_handle: None
        }
    }

    pub fn new_with_texture(position: (f32, f32), size: (f32, f32), texture_handle: Arc<CanvasTextureHandle>) -> Sprite {

        let fsize = (size.0 as f32, size.1 as f32);

        Sprite {
            vertices: [
                (position.0,  position.1 ),                    // top left
                (position.0,  position.1 + fsize.1),           // bottom left
                (position.0 + fsize.0, position.1 + fsize.1 ), // bottom right
                (position.0,  position.1 ),                    // top left
                (position.0 + fsize.0, position.1 + fsize.1 ), // bottom right
                (position.0 + fsize.0, position.1 ),           // top right
            ],
            position: position,
            ti_position: [
                (-1.0, -1.0),          // top left
                (-1.0,  1.0),          // bottom left
                ( 1.0,  1.0),          // bottom right
                (-1.0, -1.0),          // top left
                ( 1.0,  1.0),          // bottom right
                ( 1.0, -1.0),          // top right
            ],
            size: size,
            color: (0.0, 0.0, 0.0, 0.0),
            textured: true,
            texture_handle: Some(texture_handle.clone())
        }
    }



}

impl Drawable for Sprite {
    fn get_vertices(&self) -> Vec<(f32,f32)> {
        self.vertices.to_vec()
    }

    fn get_color(&self) -> (f32, f32, f32, f32) {
        self.color.clone()
    }

    fn get_ti_coords(&self) -> Vec<(f32, f32)> {
        self.ti_position.to_vec()
    }

    fn get_texture_handle(&self) -> Option<Arc<CanvasTextureHandle>> {
        match self.textured {
            true => {
                self.texture_handle.clone()
            },
            false => None,
        }
    }

    fn get_image_handle(&self) -> Option<Arc<CanvasImageHandle>> {
        None
    }
}

/*

        let vertex_buffer = {

            CpuAccessibleBuffer::from_iter(self.device.clone(), BufferUsage::all(), [
                ColoredVertex2D { position: [ 1.0, 1.0 ], color },
                ColoredVertex2D { position: [ 1.0, 0.5 ], color },
                ColoredVertex2D { position: [ 0.5, 0.5 ], color },
                ColoredVertex2D { position: [ 0.5, 1.0 ], color },
            ].iter().cloned()).unwrap()
        };

*/