/*Created on 10/27/2023 21:01:45.*/

const sharp = require('sharp');
const fs = require('fs');

class FHSharpTestLib {
 /**
   * @param {String} resPath
   * @returns {Promise.<String>}
   */ 
   
   
  
 async fHSharpTest( resPath ) {
  
  console.log("input start");
  console.log(resPath);
  console.log("input end");
  
  const baseFile = resPath.concat("canvas.jpg");
  
  console.log("In main");
  const svgPostLine1Height = 50;
  const svgPostLine2Height = 50;
  const line1px = "42px";
  const line2px = "36px";
  const line1HexVal = "#595959";
  const line2HexVal = "#ff0000";
  const line1Style = "bold";
  const line2Style = "normal";
  const postLine1 = "This is Line 1. it is bold and in gray";
  const postLine2 = "This is Line 2. it is in normal and in red";
  const svgLineWidth = 512;
  const rightTextOffset = 25;
  const fontUrl = resPath.concat("fonts/arial.ttf");
  const svgPostLine1 = `
              <svg width="${svgLineWidth}" height="${svgPostLine1Height}">
              <rect x="0" y="0" width="100%" height="100%" fill="lightpink" opacity="1"/>
              <text x="${rightTextOffset}" y="80%" src = "url('${fontUrl}')" font-family = "arial" font-size = "${line1px}" fill = "${line1HexVal}" font-weight= "${line1Style}" text-anchor="start" class="title"><![CDATA[${postLine1}]]></text>
              </svg>`;

  const svgPostLine2 = `
              <svg width="${svgLineWidth}" height="${svgPostLine2Height}">
              <rect x="0" y="0" width="100%" height="100%" fill="lightpink" opacity="1"/>
              <defs>
              <style type="text/css">@import url("https://fonts.googleapis.com/css2?family=Roboto");
              </style>
              </defs>
              <text x="${rightTextOffset}" y="65%" font-family = "Roboto" font-size = "${line2px}" fill = "${line2HexVal}" font-weight= "${line2Style}" text-anchor="start" class="title"><![CDATA[${postLine2}]]></text>
              </svg>`;

  console.log(svgPostLine1);
  console.log(svgPostLine2);

 const svgLine1 = Buffer.from(svgPostLine1);
 const svgLine2 = Buffer.from(svgPostLine2);
 
 try {
 
        return sharp(baseFile)
          .composite([
            { 
              input: svgLine1,
              top: 200,
              left: 200
            },
            { 
              input: svgLine2,
              top: 400,
              left: 200
            }
          ])
          .toBuffer();

  } catch (error) {
    console.log( error);
  }
  
}

}

Backendless.ServerCode.addService( FHSharpTestLib );