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'use strict';
/**
* Draws concentric circles. Each ring has its own color.
*
* @function CircleScreen
* @implements IScreen
*/
module.exports = function (modulation, width, height, renderer) {
let response = '';
const circles = width > height ? height : width;
for (let i = 0; i < circles; ++i) {
const centerX = Math.round(width / 2) + 1;
const centerY = Math.round(height / 2) + 1;
const red = Math.floor(Math.random() * 255);
const blue = Math.floor(Math.random() * 255);
const green = Math.floor(Math.random() * 255);
for (let j = 0; j < 180; ++j) {
const angle = 2 * j * (Math.PI / 180);
const x = Math.round(centerX + Math.sin(angle) * i);
const y = Math.round(centerY + Math.cos(angle) * i);
if (x <= width && x > 0 && y <= height && y > 0) {
const position = `\x1B[${y};${x}H`; // Move cursor to y,x (CSI y;x H)
response += `${position}${renderer(red, blue, green)} `;
}
}
}
return response;
};
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