export function iniValue(content: string, key: string): string {
  const escapedKey = key.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
  const match = content.match(new RegExp(`^[ \\t]*${escapedKey}[ \\t]*=[ \\t]*(.*?)[ \\t]*$`, "mi"));
  return match?.[1] ?? "";
}

export function updateIniValues(content: string, changes: Record<string, string>): string {
  const newline = content.includes("\r\n") ? "\r\n" : "\n";
  const lines = content.replace(/\r\n/g, "\n").split("\n");
  const changed = new Set<string>();
  const output = lines.map((line) => {
    const match = line.match(/^\s*([^=\s]+)\s*=.*$/);
    if (!match || changes[match[1]] === undefined) return line;
    changed.add(match[1]);
    return `${match[1]}=${changes[match[1]]}`;
  });
  const missing = Object.entries(changes).filter(([key]) => !changed.has(key));
  if (missing.length) {
    if (output.length && output[output.length - 1] !== "") output.push("");
    output.push(...missing.map(([key, value]) => `${key}=${value}`));
  }
  return output.join(newline);
}