'use strict';

/**
 * Draws random sprinkles in the screen each frame. Same color per
 * frame.
 *
 * @function SprinklesScreen
 * @implements IScreen
 */
module.exports = function (modulation, width, height, renderer) {

    let response = '';

    const maxSprinkleCount = (width * height) / 2;
    const minSprinkleCount = (width * height) / 8;
    const sprinkleCount = Math.round(Math.random() * (maxSprinkleCount - minSprinkleCount)) + minSprinkleCount;

    const red = Math.floor(Math.random() * 255);
    const blue = Math.floor(Math.random() * 255);
    const green = Math.floor(Math.random() * 255);

    for (let i = 0; i < sprinkleCount; ++i) {
        const x = Math.round(Math.random() * (width - 1)) + 1;
        const y = Math.round(Math.random() * (height - 1)) + 1;

        const position = `\x1B[${y};${x}H`; // Move cursor to y,x (CSI y;x H)

        response += `${position}${renderer(red, blue, green)} `;
    }

    return response;
};