import type { PathCommand } from "../types/typeface.js";

/**
 * Serialises an array of PathCommand objects to the typeface.js outline string format.
 * The outline string is space-separated tokens: "type [x y] [x1 y1] [x2 y2]".
 * An optional scale factor is applied and coordinates are rounded to integers.
 */
export function outlineToString(commands: PathCommand[], scale = 1): string {
    let result = "";

    for (const cmd of commands) {
        result += `${cmd.type} `;

        if (cmd.x !== undefined && cmd.y !== undefined) {
            result += `${Math.round(cmd.x * scale)} `;
            result += `${Math.round(cmd.y * scale)} `;
        }

        if (cmd.x1 !== undefined && cmd.y1 !== undefined) {
            result += `${Math.round(cmd.x1 * scale)} `;
            result += `${Math.round(cmd.y1 * scale)} `;
        }

        if (cmd.x2 !== undefined && cmd.y2 !== undefined) {
            result += `${Math.round(cmd.x2 * scale)} `;
            result += `${Math.round(cmd.y2 * scale)} `;
        }
    }

    return result;
}