// this code takes a src string, 
// tries to fine multiline strings that are 
// of the form 
// var fs = ` .... ` or let vs = `....`
// and tries to compress them via 
// glslx 

// I found renaming hard to manage so this is set to not rename. (my approach is to rename myself to something small) 

function compressShaders(src) {
  const regex = /(let|var)\s+(\w+)\s*=\s*(`|")([\s\S]*?)\3/gs;

  let modifiedSrc = '';
  let lastIndex = 0;
  let match;

  while ((match = regex.exec(src)) !== null) {
    const variableDeclaration = match[1];
    const variableName = match[2];
    const openingDelimiter = match[3];
    const content = match[4];
    let modifiedContent = content; 

    // try to compress via glslx
    let result = GLSLX.compile(content, {
            disableRewriting: false,
            format: "json",
            keepSymbols: false,
            prettyPrint: false,
            renaming: "none",
    });

    if (result.output === null) {
    } else {
      var jsonData = JSON.parse(result.output);
      modifiedContent = jsonData.shaders[0].contents;
    }

    modifiedSrc += src.slice(lastIndex, match.index); // Append the portion before the matched string
    modifiedSrc += `${variableDeclaration} ${variableName} = ${openingDelimiter}${modifiedContent}${openingDelimiter}`; // Append the modified string
    lastIndex = match.index + match[0].length;
  }

  modifiedSrc += src.slice(lastIndex); // Append the remaining portion of the source string
  return modifiedSrc;
}