/**
 * @file /src/utils/window.ts
 * @name Window
 * @description Utility functions for interacting with the window object.
 */

import { MM_PER_INCH, STANDARD_PIXELS_PER_INCH } from "../constants/sizing";
import { pythagoreanTheorem } from "./math";

/**
 * Calculates the DPI of the window.
 * @returns The DPI of the window.
 */
const calculateWindowDPI = (): number => {
    const ratio =
        pythagoreanTheorem(window.screen.width, window.screen.height) /
        pythagoreanTheorem(window.screen.availWidth, window.screen.availHeight);
    const dpi = ratio * STANDARD_PIXELS_PER_INCH;

    return dpi;
};

/**
 * Converts millimeters to pixels.
 *
 * @param mm - The length in millimeters.
 * @returns The length in pixels.
 */
export const mmToPixels = (mm: number): number => {
    const dpi = calculateWindowDPI();
    const inches = mm / MM_PER_INCH;
    return inches * dpi;
};