pub const UWU_HEIGHT: u32 = 24;
pub const UWU_WIDTH: u32 = 16;
pub const UWU_SHEET_RAW: &[u8] = include_bytes!("uwu-logo-font-20px.png");

mod sprite_sheets {
  use super::{UWU_HEIGHT, UWU_SHEET_RAW, UWU_WIDTH};
  use sdl2::{
    image::LoadTexture,
    pixels::PixelFormatEnum,
    rect::Rect,
    render::{Canvas, Texture, TextureCreator},
    surface::{self, Surface},
    video::WindowContext,
  };
  use std::collections::HashMap;

  pub struct UwUFont<'a> {
    sheet: Surface<'a>,
  }

  fn uwu_get_n(n: u32) -> Rect {
    Rect::new((UWU_WIDTH * n) as i32, 0, UWU_WIDTH, UWU_HEIGHT)
  }

  #[inline]
  fn uwu_u() -> Rect {
    return uwu_get_n(0);
  }

  #[inline]
  fn uwu_w() -> Rect {
    return uwu_get_n(1);
  }

  #[inline]
  fn uwu_s() -> Rect {
    return uwu_get_n(2);
  }

  #[inline]
  fn uwu_p() -> Rect {
    return uwu_get_n(3);
  }

  #[inline]
  fn uwu_a() -> Rect {
    return uwu_get_n(4);
  }

  #[inline]
  fn uwu_c() -> Rect {
    return uwu_get_n(5);
  }

  #[inline]
  fn uwu_e() -> Rect {
    return uwu_get_n(6);
  }

  impl<'a> UwUFont<'a> {
    pub fn new(texture_creator: &'a TextureCreator<WindowContext>) -> UwUFont<'a> {
      let surface = Surface::new(112, 24, PixelFormatEnum::RGB24).unwrap();
      let mut canvas = Canvas::from_surface(surface).unwrap();
      let tc = canvas.texture_creator();
      let tx = tc.load_texture_bytes(UWU_SHEET_RAW).unwrap();
      canvas.copy(&tx, None, None).unwrap();
      canvas.present();
      let sheet = canvas.into_surface();

      UwUFont { sheet }
    }

    pub fn pos_to_rect(x: i32, y: i32) -> Rect {
      return Rect::new(x, y, UWU_WIDTH, UWU_HEIGHT);
    }

    pub fn char_to_surface(&self, char: Rect) -> Surface {
      let mut char_surface = Surface::new(UWU_WIDTH, UWU_HEIGHT, PixelFormatEnum::RGB24).unwrap();
      self
        .sheet
        .blit(char, &mut char_surface, Self::pos_to_rect(0, 0))
        .unwrap();
      char_surface
    }

    pub fn u_surface(&self) -> Surface {
      return self.char_to_surface(uwu_u());
    }

    pub fn w_surface(&self) -> Surface {
      return self.char_to_surface(uwu_w());
    }
  }
}

pub use sprite_sheets::UwUFont;