const fs = require("fs");
const path = require("path");

function createTemplateRenderer({
  baseDir = path.resolve("templates"),
  useCache = true,
} = {}) {
  const cache = {};

  return function render(fileName, vars = {}) {
    const filePath = path.join(baseDir, fileName);
    let template;

    if (useCache && cache[filePath]) {
      template = cache[filePath];
    } else {
      template = fs.readFileSync(filePath, "utf8");
      if (useCache) cache[filePath] = template;
    }

    let html = template;
    for (const [key, value] of Object.entries(vars)) {
      html = html.replace(new RegExp(`{{${key}}}`, "g"), value);
    }

    return html;
  };
}

module.exports = { createTemplateRenderer };