import { CanvasRenderingContext2D } from "https://deno.land/x/skia_canvas@0.4.1/mod.ts";

export const wordWrap = (ctx: CanvasRenderingContext2D, text: string, maxWidth: number, lineWidth?: number) => {
  const words = text.split(' ');
  let testLine = '';
  const lines: string[] = [];

  for (const word of words) {
    const previous = testLine;
    testLine += ` ${word}`;
    testLine = testLine.replace(/^\s/, '');
    const { width } = ctx.measureText(testLine);

    const calcedWidth = lineWidth && lines.length === 0 ? lineWidth : maxWidth;
    
    if (width > calcedWidth) {
      lines.push(previous);
      testLine = word;
    }
  }
  if (testLine) lines.push(testLine);

  return lines;
}