/**
  Well known colors
*/
enum Colors {
    //% blockIdentity=basic.color
    //% block=red
    Red = 0x00FF0000,
    //% blockIdentity=basic.color
    //% block=orange
    Orange = 0x00FFA500,
    //% blockIdentity=basic.color
    //% block=yellow
    Yellow = 0x00FFFF00,
    //% blockIdentity=basic.color
    //% block=green
    Green = 0x0000FF00,
    //% blockIdentity=basic.color
    //% block=blue
    Blue = 0x000000FF,
    //% blockIdentity=basic.color
    //% block=indigo
    Indigo = 0x004b0082,
    //% blockIdentity=basic.color
    //% block=violet
    Violet = 0x008a2be2,
    //% blockIdentity=basic.color
    //% block=purple
    Purple = 0x00FF00FF,
    //% blockIdentity=basic.color
    //% block=white
    White = 0xFFFFFFFF,
    //% blockIdentity=basic.color
    //% block=off
    Off = 0x00000000,
}

/**
 * Provides access to basic micro:bit functionality.
 */
//% color=#54C9C9 weight=100
namespace basic {

    /**
     * Converts the color name to a number
     */
    //% blockId=color_id block="%c" shim=TD_ID
    export function color(c: Colors): number {
        return c;
    }

    /**
     * Converts red, green, blue channels into a RGB color
     * @param red value of the red channel between 0 and 255. eg: 255
     * @param green value of the green channel between 0 and 255. eg: 255
     * @param blue value of the blue channel between 0 and 255. eg: 255
     * @param white value of the white channel between 0 and 255. eg: 0
     */
    //% weight=1
    //% blockId="core_rgb" block="red %red|green %green|blue %blue|white %white"
    export function rgbw(red: number, green: number, blue: number, white:number): number {
        return ((white & 0xFF) << 24) | ((red & 0xFF) << 16) | ((green & 0xFF) << 8) | (blue & 0xFF);
    }
    
    /**
     * Scroll a number on the screen. If the number fits on the screen (i.e. is a single digit), do not scroll.
     * @param interval speed of scroll; eg: 150, 100, 200, -100
     */
    //% help=basic/show-number
    //% weight=96
    //% blockId=device_show_number block="show|number %number" blockGap=8
    //% async
    //% parts="ledmatrix" interval.defl=150
    export function showNumber(value: number, interval?: number) {
        showString(Math.roundWithPrecision(value, 2).toString(), interval);
    }
}

/**
 * Pause for the specified time in milliseconds
 * @param ms how long to pause for, eg: 100, 200, 500, 1000, 2000
 */
function pause(ms: number): void {
    basic.pause(ms);
}

/**
 * Repeats the code forever in the background. On each iteration, allows other codes to run.
 * @param body code to execute
 */
function forever(a: () => void): void {
    basic.forever(a);
}