import fs from "fs";

const path = "src/utils/mail-body-text.ts";
let src = fs.readFileSync(path, "utf8");
const start = src.indexOf("export function resolveParsedMailBody");
if (start < 0) throw new Error("missing");

const neu = `export function resolveParsedMailBody(parsed: {
  text?: string | false | null;
  html?: string | false | null;
}): string {
  const text =
    typeof parsed.text === "string" ? parsed.text.trim() : "";
  const htmlRaw =
    typeof parsed.html === "string" ? parsed.html : "";
  const fromHtml = htmlRaw ? htmlToPlainText(htmlRaw) : "";

  if (!text && !fromHtml) return "";
  if (!text) return fromHtml;
  if (!fromHtml) return text;

  // Prefer longer side so troubleshooting body is not truncated
  if (fromHtml.length > text.length + 40) return fromHtml;
  if (text.length > fromHtml.length + 40) return text;

  const textHead = text.slice(0, Math.min(48, text.length));
  if (textHead && fromHtml.includes(textHead) && fromHtml.length >= text.length) {
    return fromHtml;
  }
  const htmlHead = fromHtml.slice(0, Math.min(48, fromHtml.length));
  if (htmlHead && text.includes(htmlHead) && text.length >= fromHtml.length) {
    return text;
  }

  // Both long and not nested: keep both parts
  if (
    text.length > 80 &&
    fromHtml.length > 80 &&
    !fromHtml.includes(textHead) &&
    !text.includes(htmlHead)
  ) {
    return \`\${text}\\n\\n---\\n\\n\${fromHtml}\`;
  }

  return fromHtml.length >= text.length ? fromHtml : text;
}
`;

src = src.slice(0, start) + neu;
fs.writeFileSync(path, src);
console.log("resolve ok, len", src.length);