Workflow-App/Workflow/app/api/resignations/resend/route.ts

// app/api/resignations/resend/route.ts
// POST /api/resignations/resend
//
// Re-send an existing resignation's email.
//   mail=initial   → re-send the initial letter
//   mail=signed    → re-send the signed distro (needs stored signature)

import { NextRequest, NextResponse } from "next/server";
import { fetchRecord, updateRecordMultipart } from "@/lib/pb";
import type { YsterbaardDirectorResignation } from "@/lib/types";
import { spawn } from "child_process";
import { HIMALAYA_BIN, himalayaSendArgs } from "@/lib/himalaya";

const PDFD_URL = process.env.PDFD_URL || "http://127.0.0.1:3070";
const PB_URL = "https://pb.agent.apphub.co.za";
const PB_TOKEN = process.env.PB_TOKEN || "";

interface ResigExpand {
  director?: Record<string, unknown>;
  company?: Record<string, unknown>;
}

export async function POST(req: NextRequest) {
  try {
    const body = await req.json();
    const { id, mail } = body as { id?: string; mail?: "initial" | "signed" };

    if (!id) return NextResponse.json({ error: "id required" }, { status: 400 });
    if (mail !== "initial" && mail !== "signed") {
      return NextResponse.json({ error: "mail must be 'initial' or 'signed'" }, { status: 400 });
    }

    const appt = await fetchRecord<YsterbaardDirectorResignation>(
      "ysterbaard_director_resignations",
      id,
      "director,company"
    );
    const director = (appt.expand as ResigExpand | undefined)?.director ?? {};
    const company = (appt.expand as ResigExpand | undefined)?.company ?? {};

    const directorName = [director.first_names, director.surname].filter(Boolean).join(" ") || "Director";
    const companyName = String(company.enterprise_name ?? "the Company");
    const signUrl = `${process.env.NEXT_PUBLIC_APP_URL || "http://localhost:6001"}/resign/${appt.sign_token}`;
    const to = appt.sent_to || "sj@dyfins.com";

    const dirAddr = pickAddress(
      {
        line_1: director.residential_address_line_1 as string | null | undefined,
        line_2: director.residential_address_line_2 as string | null | undefined,
        town_city: director.residential_town_city as string | null | undefined,
        province: director.residential_province as string | null | undefined,
        postal_code: director.residential_postal_code as string | null | undefined,
      },
      director.residential_address as string | undefined
    );
    const coAddr = pickAddress(
      {
        line_1: company.physical_address_line_1 as string | null | undefined,
        line_2: company.physical_address_line_2 as string | null | undefined,
        town_city: company.physical_town_city as string | null | undefined,
        province: company.physical_province as string | null | undefined,
        postal_code: company.physical_postal_code as string | null | undefined,
      },
      company.physical_address as string | undefined
    );

    let eml: string;
    let pdfBytes: Buffer | null = null;
    let pdfFilename = "";

    if (mail === "initial") {
      const today = new Date().toISOString().split("T")[0];
      const html = letterHtml({
        directorName,
        directorIdNo: String(director.id_no ?? ""),
        directorEmail: String(director.email ?? ""),
        directorCellPhone: String(director.telephone ?? ""),
        residentialAddressLine1: dirAddr.line_1,
        residentialAddressLine2: dirAddr.line_2,
        residentialTownCity: dirAddr.town_city,
        residentialProvince: dirAddr.province,
        residentialPostalCode: dirAddr.postal_code,
        companyName,
        physicalAddressLine1: coAddr.line_1,
        physicalAddressLine2: coAddr.line_2,
        physicalTownCity: coAddr.town_city,
        physicalProvince: coAddr.province,
        physicalPostalCode: coAddr.postal_code,
        signUrl,
        letterDate: today,
      });
      pdfFilename = `resignation-letter-${companyName.replace(/[^A-Za-z0-9]/g, "_")}.pdf`;
      pdfBytes = await renderPdf(html, `resignation-letter-${companyName.replace(/[^A-Za-z0-9]/g, "_")}`);
      eml = buildInitialEml({ to, directorName, companyName, signUrl, pdfBytes, pdfFilename });
    } else {
      // signed
      const signatureBase64 = await fetchSignatureBase64(appt);
      if (!signatureBase64) {
        return NextResponse.json({ error: "No signature stored — cannot resend signed copy." }, { status: 400 });
      }
      const date = new Date().toISOString().split("T")[0];
      const directorForRender = {
        ...director,
        residential_address_line_1: dirAddr.line_1,
        residential_address_line_2: dirAddr.line_2,
        residential_town_city: dirAddr.town_city,
        residential_province: dirAddr.province,
        residential_postal_code: dirAddr.postal_code,
      };
      const companyForRender = {
        ...company,
        physical_address_line_1: coAddr.line_1,
        physical_address_line_2: coAddr.line_2,
        physical_town_city: coAddr.town_city,
        physical_province: coAddr.province,
        physical_postal_code: coAddr.postal_code,
      };
      const html = signedLetterHtml(directorForRender, companyForRender, date, signatureBase64, signUrl);
      pdfFilename = `signed-resignation-${companyName.replace(/[^A-Za-z0-9]/g, "_")}.pdf`;
      pdfBytes = await renderPdf(html, `signed-resignation-${companyName.replace(/[^A-Za-z0-9]/g, "_")}`);
      eml = buildSignedEml({ to, directorName, companyName, date, pdfBytes, pdfFilename });
    }

    // Persist to PB
    if (pdfBytes) {
      try {
        const pdfFile = new File([pdfBytes], pdfFilename, { type: "application/pdf" });
        await updateRecordMultipart(
          "ysterbaard_director_resignations",
          appt.id,
          {},
          [{ field: "letter", file: pdfFile }]
        );
      } catch (saveErr) {
        console.error("Resend: failed to persist PDF to PB:", saveErr);
      }
    }

    await sendViaHimalaya(eml);
    return NextResponse.json({ ok: true, mail });
  } catch (err: unknown) {
    const msg = err instanceof Error ? err.message : String(err);
    console.error("Resend error:", msg);
    return NextResponse.json({ error: msg }, { status: 500 });
  }
}

function pickAddress(
  structured: { line_1?: string | null; line_2?: string | null; town_city?: string | null; province?: string | null; postal_code?: string | null },
  flat?: string | null
): { line_1: string; line_2: string; town_city: string; province: string; postal_code: string } {
  const s = (v: string | null | undefined) => (v ?? "").trim();
  const line1 = s(structured.line_1);
  const town = s(structured.town_city);
  const zip = s(structured.postal_code);
  const structuredLooksReal =
    (line1 && !/FIXED|TEST|PLACEHOLDER|XXX/i.test(line1)) ||
    (town && !/^(JOHANNESBURG|PRETORIA|CAPE TOWN|TEST)$/i.test(town)) ||
    (zip && zip !== "2000" && zip !== "0000");
  if (structuredLooksReal && (line1 || town || zip)) {
    return { line_1: line1, line_2: s(structured.line_2), town_city: town, province: s(structured.province), postal_code: zip };
  }
  if (!flat) return { line_1: "", line_2: "", town_city: "", province: "", postal_code: "" };
  const parts = flat.split(",").map((p) => p.trim()).filter(Boolean);
  if (parts.length >= 5) {
    return { line_1: parts[0], line_2: "", town_city: [parts[1], parts[2]].filter(Boolean).join(", "), province: parts[3], postal_code: parts[4] };
  }
  if (parts.length === 4) return { line_1: parts[0], line_2: "", town_city: parts[1], province: parts[2], postal_code: parts[3] };
  if (parts.length === 3) return { line_1: parts[0], line_2: "", town_city: parts[1], province: "", postal_code: parts[2] };
  if (parts.length === 2) return { line_1: parts[0], line_2: "", town_city: parts[1], province: "", postal_code: "" };
  return { line_1: parts[0] || "", line_2: "", town_city: "", province: "", postal_code: "" };
}

/** Render the PDF, or return null if the local renderer is down.
 *
 *  The pdfd service on PDFD_URL is often not running. Previously a failed
 *  render threw, which aborted the whole resend BEFORE himalaya was ever
 *  called — so a dead PDF service silently blocked email delivery and the
 *  user saw a bare 500. A missing attachment is recoverable; a lost letter
 *  is not, so we degrade to an HTML-only email and say so. */
async function renderPdf(html: string, filename: string): Promise<Buffer | null> {
  try {
    const res = await fetch(`${PDFD_URL}/pdf`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ html, filename }),
      signal: AbortSignal.timeout(20000),
    });
    if (!res.ok) {
      console.error(`[resend] pdfd returned ${res.status} — sending without attachment`);
      return null;
    }
    const data = (await res.json()) as { pdf: string };
    return Buffer.from(data.pdf, "base64");
  } catch (e) {
    console.error("[resend] PDF render failed — sending without attachment:", e instanceof Error ? e.message : e);
    return null;
  }
}

async function fetchSignatureBase64(appt: YsterbaardDirectorResignation): Promise<string | null> {
  if (!appt.signature) return null;
  const url = `${PB_URL}/api/files/${appt.collectionId}/${appt.id}/${appt.signature}`;
  const res = await fetch(url, { headers: PB_TOKEN ? { Authorization: PB_TOKEN } : {} });
  if (!res.ok) return null;
  const buf = Buffer.from(await res.arrayBuffer());
  return buf.toString('base64');
}

function buildInitialEml(opts: {
  to: string; directorName: string; companyName: string; signUrl: string;
  pdfBytes: Buffer | null; pdfFilename: string;
}): string {
  const boundary = "----YSTERBAARD_" + Date.now();
  let eml = `To: ${opts.to}\r\nFrom: SJ@Dyfins.com\r\nSubject: Letter of Resignation — ${opts.companyName}\r\nMIME-Version: 1.0\r\n`;
  eml += `Content-Type: multipart/mixed; boundary="${boundary}"\r\n\r\n`;
  eml += `--${boundary}\r\nContent-Type: text/html; charset="utf-8"\r\nContent-Transfer-Encoding: 7bit\r\n\r\n`;
  eml += initialEmailBodyHtml(opts.directorName, opts.companyName, opts.signUrl);
  // The PDF service is optional — fall back to a text/plain-only message so
  // the letter still reaches the director when the renderer is down.
  if (opts.pdfBytes && opts.pdfFilename) {
    eml += `\r\n--${boundary}\r\nContent-Type: application/pdf; name="${opts.pdfFilename}"\r\nContent-Transfer-Encoding: base64\r\nContent-Disposition: attachment; filename="${opts.pdfFilename}"\r\n\r\n`;
    eml += opts.pdfBytes.toString("base64").replace(/(.{76})/g, "$1\r\n");
  }
  eml += `\r\n--${boundary}--\r\n`;
  return eml;
}

function initialEmailBodyHtml(directorName: string, companyName: string, signUrl: string): string {
  return `<!DOCTYPE html><html><head><meta charset="utf-8"></head>
<body style="font-family:Arial,sans-serif;font-size:14px;color:#222;max-width:600px;margin:40px auto;padding:0 20px;">
<div style="background:#f8f9fa;border:1px solid #ddd;border-radius:8px;padding:24px;">
<p>Dear ${directorName},</p>
<p>Please find attached your <strong>Letter of Resignation</strong> for <strong>${companyName}</strong>.</p>
<div style="background:#fff;border:1px solid #eee;border-radius:6px;padding:20px;margin:20px 0;">
<p><strong>To sign electronically, click the button below and draw your signature:</strong></p>
<p style="text-align:center;margin:24px 0;">
  <a href="${signUrl}" style="display:inline-block;background:#0066cc;color:#fff;padding:12px 24px;border-radius:6px;text-decoration:none;font-size:14px;font-weight:bold;">Sign Resignation</a>
</p>
<p>Or copy this link:<br/><span style="color:#0066cc;font-size:12px;word-break:break-all;">${signUrl}</span></p>
</div>
<p>Yours sincerely,<br/><strong>${directorName}</strong></p>
</div></body></html>`;
}

function buildSignedEml(opts: {
  to: string; directorName: string; companyName: string; date: string;
  pdfBytes: Buffer | null; pdfFilename: string;
}): string {
  const boundary = "----YSTERBAARD_" + Date.now();
  let eml = `To: ${opts.to}\r\nFrom: SJ@Dyfins.com\r\nSubject: ${opts.directorName} signed resignation from ${opts.companyName}\r\nMIME-Version: 1.0\r\n`;
  eml += `Content-Type: multipart/mixed; boundary="${boundary}"\r\n\r\n`;
  eml += `--${boundary}\r\nContent-Type: text/html; charset="utf-8"\r\nContent-Transfer-Encoding: 7bit\r\n\r\n`;
  eml += signedEmailBodyHtml(opts.directorName, opts.companyName, opts.date);
  if (opts.pdfBytes && opts.pdfFilename) {
    eml += `\r\n--${boundary}\r\nContent-Type: application/pdf; name="${opts.pdfFilename}"\r\nContent-Transfer-Encoding: base64\r\nContent-Disposition: attachment; filename="${opts.pdfFilename}"\r\n\r\n`;
    eml += opts.pdfBytes.toString("base64").replace(/(.{76})/g, "$1\r\n");
  }
  eml += `\r\n--${boundary}--\r\n`;
  return eml;
}

function signedEmailBodyHtml(directorName: string, companyName: string, date: string): string {
  return `<!DOCTYPE html><html><head><meta charset="utf-8"></head>
<body style="font-family:Arial,sans-serif;font-size:14px;color:#222;max-width:600px;margin:40px auto;padding:0 20px;">
<div style="background:#f8f9fa;border:1px solid #ddd;border-radius:8px;padding:24px;">
<h2 style="text-align:center;color:#0a0a0a;font-size:18px;margin:0 0 16px;">Letter of Resignation — Signed</h2>
<p>This is to confirm that <strong>${directorName}</strong> has signed the Letter of Resignation from <strong>${companyName}</strong>.</p>
<p>Date: ${date}</p>
<p style="color:#888;font-style:italic;">[Signature on file — see attached signed letter]</p>
<p>The full signed letter is attached as a PDF.</p>
</div></body></html>`;
}

async function sendViaHimalaya(eml: string): Promise<void> {
  return new Promise<void>((resolve, reject) => {
    const child = spawn(
      HIMALAYA_BIN,
      himalayaSendArgs("dyfins"),
      { stdio: ["pipe", "pipe", "pipe"] }
    );
    let err = "";
    child.stderr.on("data", (d) => { err += d.toString(); });
    child.on("error", (e) => reject(e));
    child.on("close", (code) => {
      if (code !== 0) reject(new Error(`himalaya exited ${code}: ${err}`));
      else resolve();
    });
    child.stdin.write(eml);
    child.stdin.end();
  });
}

function letterHtml(opts: {
  directorName: string;
  directorIdNo: string;
  directorEmail: string;
  directorCellPhone: string;
  residentialAddressLine1: string;
  residentialAddressLine2: string;
  residentialTownCity: string;
  residentialProvince: string;
  residentialPostalCode: string;
  companyName: string;
  physicalAddressLine1: string;
  physicalAddressLine2: string;
  physicalTownCity: string;
  physicalProvince: string;
  physicalPostalCode: string;
  signUrl: string;
  letterDate: string;
}): string {
  const esc = (s: string) => String(s ?? "")
    .replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;").replace(/'/g, "&#39;");
  const dir = {
    name: esc(opts.directorName), id: esc(opts.directorIdNo),
    email: esc(opts.directorEmail), cell: esc(opts.directorCellPhone),
    addr1: esc(opts.residentialAddressLine1), addr2: esc(opts.residentialAddressLine2),
    town: esc(opts.residentialTownCity), province: esc(opts.residentialProvince),
    zip: esc(opts.residentialPostalCode),
  };
  const co = {
    name: esc(opts.companyName),
    p1: esc(opts.physicalAddressLine1), p2: esc(opts.physicalAddressLine2),
    pt: esc(opts.physicalTownCity), pp: esc(opts.physicalProvince), pz: esc(opts.physicalPostalCode),
  };
  const d = new Date(opts.letterDate);
  const dayOfMonth = d.getUTCDate();
  const monthNames = ["January","February","March","April","May","June","July","August","September","October","November","December"];
  const monthName = monthNames[d.getUTCMonth()];
  const year = d.getUTCFullYear();

  return `<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>Letter of Resignation</title>
<style>
  @page { size: A4; margin: 25mm; }
  body { font-family: Arial, sans-serif; font-size: 11pt; color: #000; line-height: 1.2; margin: 0; }
  .top-block { margin: 0; padding: 0; }
  .addressee-block { margin: 0; padding: 0; line-height: 1.4; text-align: left; }
  .hdr { font-weight: bold; margin: 14pt 0 4pt 0; }
  p { margin: 6pt 0; text-align: justify; }
  .sign-line { border-top: 1px solid #000; padding-top: 4pt; width: 60%; margin-top: 4pt; }
  .sign-link-box { margin: 12pt 0; padding: 8pt; background: #f4f4f4; border: 1px solid #ccc; font-family: monospace; font-size: 9pt; text-align: left; word-break: break-all; }
  .footer { margin-top: 24pt; font-size: 9pt; color: #555; text-align: center; font-style: italic; }
  .signature-block { text-align: left; margin-top: 28pt; }
  .signature-name { margin-top: 4pt; }
  table { border-collapse: collapse; }
</style></head>
<body>

<table class="top-block" cellspacing="0" cellpadding="0" border="0" width="100%">
  <tr>
    <td style="text-align:left;width:35%;vertical-align:top;">&nbsp;</td>
    <td style="text-align:right;width:65%;vertical-align:top;font-weight:bold;">${dir.name}<br/>
      <span style="font-weight:normal;">${dir.addr1}${dir.addr2 ? `<br/>${dir.addr2}` : ``}<br/>
      ${[dir.town, dir.zip].filter(Boolean).join(", ")}${dir.province ? `<br/>${dir.province}` : ``}<br/>
      ${dir.email}<br/>
      ${dir.cell}<br/>
      &nbsp;<br/>
      <span style="font-weight:normal;">${opts.letterDate}</span></span>
    </td>
  </tr>
</table>

<div class="addressee-block"><strong>The Board</strong><br/>
${co.name}<br/>
${co.p1 ? `${co.p1}<br/>` : ``}${co.p2 ? `${co.p2}<br/>` : ``}
${co.pt ? `${co.pt}<br/>` : ``}
${co.pp ? `${co.pp}<br/>` : ``}
${co.pz ? `${co.pz}<br/>` : ``}
</div>

<div class="hdr">Dear Members of The Board</div>

<p>Please accept this letter as formal notification that I am resigning from my position as Director of the Company, effective immediately, in accordance with the provisions of the Companies Act 71 of 2008 (as amended).</p>

<p>I acknowledge that I have no claim for compensation for loss of office or otherwise against the Company, its officers, or its employees. I further acknowledge that, from this date forward, I am no longer bound by the duties, responsibilities, and liabilities of this office as defined by the Act, common law, and any other applicable legislation.</p>

<p>Please confirm receipt of this letter and the effective date of my resignation.</p>

<p>Signed at ${dir.town || "_____________"} on this ${dayOfMonth} day of ${monthName} ${year}.</p>

<div class="signature-block">
  <div class="sign-line">&nbsp;</div>
  <p class="signature-name">
    <strong>${dir.name}</strong><br/>
    ID ${dir.id}
  </p>
</div>

<div class="sign-link-box"><strong>To sign electronically, visit:</strong><br/>${opts.signUrl}</div>

<p>Alternatively, you may print this letter, sign in the space provided above, and return the signed copy to the Company Secretary at the company&rsquo;s registered address.</p>

<div class="footer">
  Issued in terms of section 71 of the Companies Act 71 of 2008
</div>

</body></html>`;
}

function signedLetterHtml(
  director: Record<string, unknown>,
  company: Record<string, unknown>,
  date: string,
  signatureBase64: string,
  signUrl: string
): string {
  const esc = (s: string) => String(s ?? "")
    .replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;").replace(/'/g, "&#39;");
  const dir = {
    name: esc([director.first_names, director.surname].filter(Boolean).join(" ")),
    id: esc(String(director.id_no ?? "")),
    addr1: esc(String(director.residential_address_line_1 ?? "")),
    addr2: esc(String(director.residential_address_line_2 ?? "")),
    town: esc(String(director.residential_town_city ?? "")),
    province: esc(String(director.residential_province ?? "")),
    zip: esc(String(director.residential_postal_code ?? "")),
  };
  const co = {
    name: esc(String(company.enterprise_name ?? "")),
    p1: esc(String(company.physical_address_line_1 ?? "")),
    p2: esc(String(company.physical_address_line_2 ?? "")),
    pt: esc(String(company.physical_town_city ?? "")),
    pp: esc(String(company.physical_province ?? "")),
    pz: esc(String(company.physical_postal_code ?? "")),
  };
  const d = new Date(date);
  const dayOfMonth = d.getUTCDate();
  const monthNames = ["January","February","March","April","May","June","July","August","September","October","November","December"];
  const monthName = monthNames[d.getUTCMonth()];
  const year = d.getUTCFullYear();
  const hasSig = !!signatureBase64;

  return `<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>Letter of Resignation</title>
<style>
  @page { size: A4; margin: 25mm; }
  body { font-family: Arial, sans-serif; font-size: 11pt; color: #000; line-height: 1.2; margin: 0; }
  .top-block { margin: 0; padding: 0; }
  .addressee-block { margin: 0; padding: 0; line-height: 1.4; text-align: left; }
  .hdr { font-weight: bold; margin: 14pt 0 4pt 0; }
  p { margin: 6pt 0; text-align: justify; }
  .sign-line { border-top: 1px solid #000; padding-top: 4pt; width: 60%; margin-top: 4pt; }
  .sig-img { height: 60pt; display: block; margin: 0; }
  .footer { margin-top: 24pt; font-size: 9pt; color: #555; text-align: center; font-style: italic; }
  .signature-block { text-align: left; margin-top: 28pt; }
  .signature-name { margin-top: 4pt; }
  table { border-collapse: collapse; }
</style></head>
<body>

<table class="top-block" cellspacing="0" cellpadding="0" border="0" width="100%">
  <tr>
    <td style="text-align:left;width:35%;vertical-align:top;">&nbsp;</td>
    <td style="text-align:right;width:65%;vertical-align:top;"><strong>${dir.name}</strong><br/>
      ${dir.addr1 ? `${dir.addr1}<br/>` : ``}
      ${dir.addr2 ? `${dir.addr2}<br/>` : ``}
      ${dir.town ? `${dir.town}<br/>` : ``}
      ${dir.province ? `${dir.province}<br/>` : ``}
      ${dir.zip ? `${dir.zip}<br/>` : ``}
    </td>
  </tr>
</table>

<div class="addressee-block"><strong>The Board</strong><br/>
${co.name}<br/>
${co.p1 ? `${co.p1}<br/>` : ``}${co.p2 ? `${co.p2}<br/>` : ``}
${co.pt ? `${co.pt}<br/>` : ``}
${co.pp ? `${co.pp}<br/>` : ``}
${co.pz ? `${co.pz}<br/>` : ``}
</div>

<div class="hdr">Dear Members of The Board</div>

<p>Please accept this letter as formal notification that I am resigning from my position as Director of the Company, effective immediately, in accordance with the provisions of the Companies Act 71 of 2008 (as amended).</p>

<p>I acknowledge that I have no claim for compensation for loss of office or otherwise against the Company, its officers, or its employees. I further acknowledge that, from this date forward, I am no longer bound by the duties, responsibilities, and liabilities of this office as defined by the Act, common law, and any other applicable legislation.</p>

<p>Please confirm receipt of this letter and the effective date of my resignation.</p>

<p>Signed at ${dir.town || "_____________"} on this ${dayOfMonth} day of ${monthName} ${year}.</p>

<div class="signature-block">
  ${hasSig
    ? `<img class="sig-img" src="data:image/png;base64,${signatureBase64}" alt="Signature"/>`
    : `<div class="sign-line">&nbsp;</div>`}
  <div class="sign-line">&nbsp;</div>
  <p class="signature-name">
    <strong>${dir.name}</strong><br/>
    ID ${dir.id}
  </p>
</div>

<div class="footer">
  Filed in terms of section 71 of the Companies Act 71 of 2008
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</body></html>`;
}