//! Definitions for VGA 4-bit colors, like the original Kroz would have used
//!
//! In the Kroz source, colors are referenced by their index in the 4-bit VGA palette.
//! Here they are for reference:
//!
//! - `0` = `BLACK`
//! - `1` = `BLUE`
//! - `2` = `GREEN`
//! - `3` = `CYAN`
//! - `4` = `RED`
//! - `5` = `MAGENTA`
//! - `6` = `YELLOW`
//! - `7` = `WHITE`
//! - `8` = `BLACK_BRIGHT`
//! - `9` = `BLUE_BRIGHT`
//! - `10` = `GREEN_BRIGHT`
//! - `11` = `CYAN_BRIGHT`
//! - `12` = `RED_BRIGHT`
//! - `13` = `MAGENTA_BRIGHT`
//! - `14` = `YELLOW_BRIGHT`
//! - `15` = `WHITE_BRIGHT`

// VGA 4-bit Colors
/// Index `0`
pub const BLACK: (u8, u8, u8) = (0, 0, 0);
/// Index `1`
pub const BLUE: (u8, u8, u8) = (0, 0, 170);
/// Index `2`
pub const GREEN: (u8, u8, u8) = (0, 170, 0);
/// Index `3`
pub const CYAN: (u8, u8, u8) = (0, 170, 170);
/// Index `4`
pub const RED: (u8, u8, u8) = (170, 0, 0);
/// Index `5`
pub const MAGENTA: (u8, u8, u8) = (170, 0, 170);
/// Index `6`
pub const YELLOW: (u8, u8, u8) = (170, 85, 0);
/// Index `7`
pub const WHITE: (u8, u8, u8) = (170, 170, 170);

// "Bold" VGA 4-bit Colors
/// Index `8`
pub const BLACK_BRIGHT: (u8, u8, u8) = (85, 85, 85);
/// Index `9`
pub const BLUE_BRIGHT: (u8, u8, u8) = (85, 85, 255);
/// Index `10`
pub const GREEN_BRIGHT: (u8, u8, u8) = (85, 255, 85);
/// Index `11`
pub const CYAN_BRIGHT: (u8, u8, u8) = (85, 255, 255);
/// Index `12`
pub const RED_BRIGHT: (u8, u8, u8) = (255, 85, 85);
/// Index `13`
pub const MAGENTA_BRIGHT: (u8, u8, u8) = (255, 85, 255);
/// Index `14`
pub const YELLOW_BRIGHT: (u8, u8, u8) = (255, 255, 85);
/// Index `15`
pub const WHITE_BRIGHT: (u8, u8, u8) = (255, 255, 255);

pub fn get_by_index(index: usize) -> (u8, u8, u8) {
    match index {
        0 => BLACK,
        1 => BLUE,
        2 => GREEN,
        3 => CYAN,
        4 => RED,
        5 => MAGENTA,
        6 => YELLOW,
        7 => WHITE,
        8 => BLACK_BRIGHT,
        9 => BLUE_BRIGHT,
        10 => GREEN_BRIGHT,
        11 => CYAN_BRIGHT,
        12 => RED_BRIGHT,
        13 => MAGENTA_BRIGHT,
        14 => YELLOW_BRIGHT,
        15 => WHITE_BRIGHT,
        _ => BLACK,
    }
}