//@ts-check
/**
 * DICKPICK is a image drawing library
 */

import * as graphics from '../../core/graphics'

/**
 * @param { number } x
 * @param { number } y
 * @param { number } dx length on the x axis
 * @param { number } dy length on the y axis
 * @param { string } color
 */
export function drawRect(x, y, dx, dy, color) {
    const bitmap = {
        data: Buffer.alloc(dx*dy*4, Buffer.from(graphics.parseHexColor(color))),
        width: dx,
        height: dy
    }

    graphics.drawBitmap(x,y, bitmap)
}

/**
 *
 * @param { import('@jimp/core').Bitmap } Bitmap
 * @param { number[] } color
 * @returns { Pencil }
 */
export function pencilFromBitmap(Bitmap, color) {
    return { ...Bitmap, color }
}

/**
 * @param { number } width
 * @param { number } height
 * @returns
 */
export function createBitmap(width, height) {
    const data = Buffer.alloc(width * height * 4, Buffer.from([0, 0, 0, 0]));
    return { width, height, data }
}

/**
 * @param { Pencil } pencil
 * @param { number } x
 * @param { number } y
 */
export function setPixel(pencil, x, y) {
    pencil.data.set(pencil.color, y*pencil.width*4 + x*4)
}


/**
 *
 * @param { number } x
 * @param { number } y
 * @param { number } xc
 * @param { number } yc
 * @param { Pencil } pencil
 */
export function symetrie8Axes(xc, yc, x, y, pencil) {
    setPixel(pencil, x+xc, y+yc)
    setPixel(pencil, x+xc,-y+yc)
    setPixel(pencil, -x+xc,-y+yc)
    setPixel(pencil, -x+xc,y+yc)
    setPixel(pencil, y+xc,x+yc)
    setPixel(pencil, y+xc,-x+yc)
    setPixel(pencil, -y+xc,-x+yc)
    setPixel(pencil, -y+xc,x+yc,)
}

/**
 * BresenhamCircle
 * @param { Pencil } pencil
 * @param { number } xc
 * @param { number } yc
 * @param { number } r
 */
export function drawCircle(pencil, xc, yc, r) {
    let x = 0
    let y = r
    let d = 3 - (2 * r);
    symetrie8Axes(xc, yc, x, y, pencil);

    while(x <= y) {
        if(d <= 0) {
            d = d + (4 * x) + 6;
        }
        else {
            d = d + (4 * x) - (4 * y) + 10;
            y = y - 1;
        }
        x = x + 1;
        symetrie8Axes(xc, yc, x, y, pencil);
    }
}