pcrt-legal-return/app/app/routes/app.settings.tsx

import { useEffect, useMemo, useState } from "react";
import type { ActionFunctionArgs, LoaderFunctionArgs } from "@remix-run/node";
import {
  useActionData,
  useLoaderData,
  useNavigation,
  useSubmit,
} from "@remix-run/react";
import {
  Page,
  Layout,
  Card,
  Tabs,
  TextField,
  Button,
  ButtonGroup,
  Banner,
  Text,
  BlockStack,
  InlineStack,
  Badge,
  Checkbox,
} from "@shopify/polaris";
import { TitleBar } from "@shopify/app-bridge-react";

import { authenticate } from "../shopify.server";
import db from "../db.server";
import { decryptSecret, encryptSecret } from "../lib/crypto.server";
import { sendTestEmail } from "../lib/mailer.server";
import {
  DEFAULT_INTRO,
  DEFAULT_NOTE,
  DEFAULT_SUBJECT,
  DEFAULT_OP_SHIPPED,
  DEFAULT_OP_UNFULFILLED,
  OP_PLACEHOLDERS,
  SAMPLE_VARS,
  TEXT_PLACEHOLDERS,
  renderOperationalPreview,
  renderReceiptHtml,
  renderSubject,
} from "../lib/emailTemplate";

export const loader = async ({ request }: LoaderFunctionArgs) => {
  const { session } = await authenticate.admin(request);
  const s = await db.settings.findUnique({ where: { shop: session.shop } });
  return {
    subject: s?.emailSubject ?? DEFAULT_SUBJECT,
    intro: s?.emailIntro ?? DEFAULT_INTRO,
    note: s?.emailNote ?? DEFAULT_NOTE,
    notifyEnabled: s?.notifyEnabled ?? true,
    notifyEmail: s?.notifyEmail ?? "",
    tagEnabled: s?.tagEnabled ?? true,
    enforceWindow: s?.enforceWindow ?? false,
    windowDays: s?.defaultWindowDays ?? 14,
    enforceExclusions: s?.enforceExclusions ?? false,
    stateAwareEmail: s?.stateAwareEmail ?? true,
    autoCancelUnfulfilled: s?.autoCancelUnfulfilled ?? false,
    returnAtCustomerExpense: s?.returnAtCustomerExpense ?? true,
    returnAddress: s?.returnAddress ?? "",
    opTextUnfulfilled: s?.opTextUnfulfilled ?? DEFAULT_OP_UNFULFILLED,
    opTextShipped: s?.opTextShipped ?? DEFAULT_OP_SHIPPED,
    smtpHost: s?.smtpHost ?? "",
    smtpPort: s?.smtpPort != null ? String(s.smtpPort) : "",
    smtpUser: s?.smtpUser ?? "",
    smtpSecure: s?.smtpSecure ?? false,
    smtpFrom: s?.smtpFrom ?? "",
    smtpPassSet: !!s?.smtpPass,
  };
};

export const action = async ({ request }: ActionFunctionArgs) => {
  const { session } = await authenticate.admin(request);
  const f = await request.formData();

  // Invio di prova: NON salva, usa i valori correnti del form (password digitata
  // oppure quella gia' salvata, decifrata). Ritorna l'errore SMTP grezzo.
  if (String(f.get("intent") ?? "save") === "test") {
    const to = String(f.get("testTo") ?? "").trim();
    if (!to) {
      return {
        ok: false,
        tested: true,
        error: "Inserisci un destinatario per la prova.",
      };
    }
    const host = String(f.get("smtpHost") ?? "").trim();
    let pass: string | null = String(f.get("smtpPass") ?? "").trim() || null;
    if (!pass) {
      const saved = await db.settings.findUnique({
        where: { shop: session.shop },
      });
      pass = saved?.smtpPass ? decryptSecret(saved.smtpPass) : null;
    }
    const smtp = host
      ? {
          host,
          port:
            Number(f.get("smtpPort")) > 0
              ? Math.trunc(Number(f.get("smtpPort")))
              : null,
          user: String(f.get("smtpUser") ?? "").trim() || null,
          pass,
          secure: f.get("smtpSecure") === "true",
          from: String(f.get("smtpFrom") ?? "").trim() || null,
        }
      : null;
    const r = await sendTestEmail({ smtp, to });
    return { ok: r.ok, tested: true, error: r.ok ? null : r.error };
  }

  const subject = String(f.get("subject") ?? "").trim();
  const intro = String(f.get("intro") ?? "").trim();
  const note = String(f.get("note") ?? "").trim();
  const opUnf = String(f.get("opTextUnfulfilled") ?? "").trim();
  const opShip = String(f.get("opTextShipped") ?? "").trim();

  const data = {
    emailSubject: subject && subject !== DEFAULT_SUBJECT ? subject : null,
    emailIntro: intro && intro !== DEFAULT_INTRO ? intro : null,
    emailNote: note || null,
    notifyEnabled: f.get("notifyEnabled") === "true",
    notifyEmail: String(f.get("notifyEmail") ?? "").trim() || null,
    tagEnabled: f.get("tagEnabled") === "true",
    enforceWindow: f.get("enforceWindow") === "true",
    defaultWindowDays: Math.min(
      365,
      Math.max(1, Number(f.get("windowDays")) || 14),
    ),
    enforceExclusions: f.get("enforceExclusions") === "true",
    stateAwareEmail: f.get("stateAwareEmail") === "true",
    autoCancelUnfulfilled: f.get("autoCancelUnfulfilled") === "true",
    returnAtCustomerExpense: f.get("returnAtCustomerExpense") === "true",
    returnAddress: String(f.get("returnAddress") ?? "").trim() || null,
    opTextUnfulfilled:
      opUnf && opUnf !== DEFAULT_OP_UNFULFILLED ? opUnf : null,
    opTextShipped: opShip && opShip !== DEFAULT_OP_SHIPPED ? opShip : null,
    smtpHost: String(f.get("smtpHost") ?? "").trim() || null,
    smtpPort:
      Number(f.get("smtpPort")) > 0 ? Math.trunc(Number(f.get("smtpPort"))) : null,
    smtpUser: String(f.get("smtpUser") ?? "").trim() || null,
    smtpSecure: f.get("smtpSecure") === "true",
    smtpFrom: String(f.get("smtpFrom") ?? "").trim() || null,
  };

  // Password SMTP: cifrata solo se fornita; vuota = invariata.
  const newPass = String(f.get("smtpPass") ?? "").trim();
  const finalData = newPass
    ? { ...data, smtpPass: encryptSecret(newPass) }
    : data;

  await db.settings.upsert({
    where: { shop: session.shop },
    create: { shop: session.shop, ...finalData },
    update: finalData,
  });
  return { ok: true, tested: false, error: null };
};

function opFrame(html: string, height = 130) {
  const doc = `<table role="presentation" width="100%" cellpadding="0" cellspacing="0" style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;">${html}</table>`;
  return (
    <iframe
      title="Anteprima riquadro"
      srcDoc={doc}
      style={{
        width: "100%",
        height: `${height}px`,
        border: "1px solid #e1e1e1",
        borderRadius: "8px",
        background: "#fff",
      }}
    />
  );
}

export default function SettingsPage() {
  const d = useLoaderData<typeof loader>();
  const actionData = useActionData<typeof action>();
  const nav = useNavigation();
  const submit = useSubmit();

  const [tab, setTab] = useState(0);
  const [subject, setSubject] = useState(d.subject);
  const [intro, setIntro] = useState(d.intro);
  const [note, setNote] = useState(d.note);
  const [notifyEnabled, setNotifyEnabled] = useState(d.notifyEnabled);
  const [notifyEmail, setNotifyEmail] = useState(d.notifyEmail);
  const [tagEnabled, setTagEnabled] = useState(d.tagEnabled);
  const [enforceWindow, setEnforceWindow] = useState(d.enforceWindow);
  const [windowDays, setWindowDays] = useState(String(d.windowDays));
  const [enforceExclusions, setEnforceExclusions] = useState(d.enforceExclusions);
  const [stateAwareEmail, setStateAwareEmail] = useState(d.stateAwareEmail);
  const [autoCancelUnfulfilled, setAutoCancelUnfulfilled] = useState(
    d.autoCancelUnfulfilled,
  );
  const [returnAtCustomerExpense, setReturnAtCustomerExpense] = useState(
    d.returnAtCustomerExpense,
  );
  const [returnAddress, setReturnAddress] = useState(d.returnAddress);
  const [opTextUnfulfilled, setOpTextUnfulfilled] = useState(d.opTextUnfulfilled);
  const [opTextShipped, setOpTextShipped] = useState(d.opTextShipped);
  const [smtpHost, setSmtpHost] = useState(d.smtpHost);
  const [smtpPort, setSmtpPort] = useState(d.smtpPort);
  const [smtpUser, setSmtpUser] = useState(d.smtpUser);
  const [smtpPass, setSmtpPass] = useState("");
  const [smtpSecure, setSmtpSecure] = useState(d.smtpSecure);
  const [smtpFrom, setSmtpFrom] = useState(d.smtpFrom);
  const [testTo, setTestTo] = useState(d.notifyEmail);
  const [showSaved, setShowSaved] = useState(false);

  const saving = nav.state === "submitting";

  useEffect(() => {
    if (actionData?.ok && !actionData.tested) setShowSaved(true);
  }, [actionData]);

  const previewSubject = useMemo(
    () => renderSubject(subject, SAMPLE_VARS),
    [subject],
  );
  const previewHtml = useMemo(
    () => renderReceiptHtml(SAMPLE_VARS, intro, note),
    [intro, note],
  );
  const previewOpUnf = useMemo(
    () =>
      renderOperationalPreview(
        {
          state: "unfulfilled",
          textUnfulfilled: opTextUnfulfilled,
          textShipped: opTextShipped,
          returnAddress,
          atCustomerExpense: returnAtCustomerExpense,
        },
        SAMPLE_VARS,
      ),
    [opTextUnfulfilled, opTextShipped, returnAddress, returnAtCustomerExpense],
  );
  const previewOpShip = useMemo(
    () =>
      renderOperationalPreview(
        {
          state: "shipped",
          textUnfulfilled: opTextUnfulfilled,
          textShipped: opTextShipped,
          returnAddress,
          atCustomerExpense: returnAtCustomerExpense,
        },
        SAMPLE_VARS,
      ),
    [opTextShipped, opTextUnfulfilled, returnAddress, returnAtCustomerExpense],
  );

  const handleTest = () => {
    setShowSaved(false);
    const fd = new FormData();
    fd.set("intent", "test");
    fd.set("testTo", testTo);
    fd.set("smtpHost", smtpHost);
    fd.set("smtpPort", smtpPort);
    fd.set("smtpUser", smtpUser);
    fd.set("smtpPass", smtpPass);
    fd.set("smtpSecure", String(smtpSecure));
    fd.set("smtpFrom", smtpFrom);
    submit(fd, { method: "post" });
  };

  const handleSave = () => {
    setShowSaved(false);
    const fd = new FormData();
    fd.set("intent", "save");
    fd.set("subject", subject);
    fd.set("intro", intro);
    fd.set("note", note);
    fd.set("notifyEnabled", String(notifyEnabled));
    fd.set("notifyEmail", notifyEmail);
    fd.set("tagEnabled", String(tagEnabled));
    fd.set("enforceWindow", String(enforceWindow));
    fd.set("windowDays", windowDays);
    fd.set("enforceExclusions", String(enforceExclusions));
    fd.set("stateAwareEmail", String(stateAwareEmail));
    fd.set("autoCancelUnfulfilled", String(autoCancelUnfulfilled));
    fd.set("returnAtCustomerExpense", String(returnAtCustomerExpense));
    fd.set("returnAddress", returnAddress);
    fd.set("opTextUnfulfilled", opTextUnfulfilled);
    fd.set("opTextShipped", opTextShipped);
    fd.set("smtpHost", smtpHost);
    fd.set("smtpPort", smtpPort);
    fd.set("smtpUser", smtpUser);
    fd.set("smtpPass", smtpPass);
    fd.set("smtpSecure", String(smtpSecure));
    fd.set("smtpFrom", smtpFrom);
    submit(fd, { method: "post" });
  };

  const resetEmail = () => {
    setSubject(DEFAULT_SUBJECT);
    setIntro(DEFAULT_INTRO);
    setNote(DEFAULT_NOTE);
    setShowSaved(false);
  };

  const saveBtn = (
    <div>
      <Button variant="primary" loading={saving} onClick={handleSave}>
        Salva
      </Button>
    </div>
  );

  const tabs = [
    { id: "email", content: "Email" },
    { id: "notifiche", content: "Notifiche" },
    { id: "regole", content: "Regole recesso" },
    { id: "reso", content: "Reso e stato ordine" },
    { id: "smtp", content: "Email (SMTP)" },
  ];

  return (
    <Page>
      <TitleBar title="Impostazioni recesso" />
      <Layout>
        <Layout.Section>
          <BlockStack gap="400">
            {showSaved ? (
              <Banner tone="success" onDismiss={() => setShowSaved(false)}>
                Salvato.
              </Banner>
            ) : null}

            {actionData?.tested ? (
              actionData.ok ? (
                <Banner tone="success">
                  Email di prova inviata a {testTo}. Controlla anche lo spam.
                </Banner>
              ) : (
                <Banner tone="critical" title="Invio di prova fallito">
                  <Text as="p">{actionData.error}</Text>
                </Banner>
              )
            ) : null}

            <Tabs tabs={tabs} selected={tab} onSelect={setTab} />

            {tab === 0 ? (
              <BlockStack gap="400">
                <Card>
                  <BlockStack gap="400">
                    <BlockStack gap="100">
                      <Text as="h2" variant="headingMd">
                        Testi dell'email
                      </Text>
                      <Text as="p" tone="subdued">
                        Oggetto e testi. Dettagli ordine, dichiarazione, data/ora,
                        avviso di legge e layout sono fissi. Segnaposto:
                      </Text>
                      <InlineStack gap="200" wrap>
                        {TEXT_PLACEHOLDERS.map((p) => (
                          <Badge key={p}>{`{{${p}}}`}</Badge>
                        ))}
                      </InlineStack>
                    </BlockStack>
                    <TextField
                      label="Oggetto"
                      value={subject}
                      onChange={setSubject}
                      autoComplete="off"
                    />
                    <TextField
                      label="Introduzione"
                      value={intro}
                      onChange={setIntro}
                      autoComplete="off"
                      multiline={4}
                    />
                    <TextField
                      label="Nota aggiuntiva (opzionale)"
                      value={note}
                      onChange={setNote}
                      autoComplete="off"
                      multiline={3}
                      helpText="Riquadro in fondo alla email. Vuoto = nascosto."
                    />
                    <ButtonGroup>
                      <Button
                        variant="primary"
                        loading={saving}
                        onClick={handleSave}
                      >
                        Salva
                      </Button>
                      <Button onClick={resetEmail}>Ripristina default</Button>
                    </ButtonGroup>
                  </BlockStack>
                </Card>
                <Card>
                  <BlockStack gap="200">
                    <Text as="h2" variant="headingMd">
                      Anteprima
                    </Text>
                    <Text as="p" tone="subdued">
                      Oggetto: {previewSubject}
                    </Text>
                    <iframe
                      title="Anteprima email"
                      srcDoc={previewHtml}
                      style={{
                        width: "100%",
                        height: "640px",
                        border: "1px solid #e1e1e1",
                        borderRadius: "8px",
                        background: "#fff",
                      }}
                    />
                  </BlockStack>
                </Card>
              </BlockStack>
            ) : null}

            {tab === 1 ? (
              <Card>
                <BlockStack gap="400">
                  <Text as="h2" variant="headingMd">
                    Notifiche al merchant
                  </Text>
                  <Checkbox
                    label="Invia email di notifica a ogni recesso"
                    checked={notifyEnabled}
                    onChange={setNotifyEnabled}
                  />
                  <TextField
                    label="Email notifiche"
                    type="email"
                    value={notifyEmail}
                    onChange={setNotifyEmail}
                    autoComplete="off"
                    disabled={!notifyEnabled}
                    helpText="Dove ricevere le notifiche. Senza indirizzo l'email non parte."
                    placeholder="ordini@tuonegozio.it"
                  />
                  {notifyEnabled && !notifyEmail.trim() ? (
                    <Banner tone="warning">
                      Notifiche attive ma nessun indirizzo: al momento non ricevi
                      nulla. Inserisci un'email.
                    </Banner>
                  ) : null}
                  <Checkbox
                    label="Aggiungi il tag 'Recesso' all'ordine"
                    checked={tagEnabled}
                    onChange={setTagEnabled}
                    helpText="Rende l'ordine filtrabile nella lista ordini."
                  />
                  {saveBtn}
                </BlockStack>
              </Card>
            ) : null}

            {tab === 2 ? (
              <Card>
                <BlockStack gap="400">
                  <BlockStack gap="100">
                    <Text as="h2" variant="headingMd">
                      Regole di recesso
                    </Text>
                    <Text as="p" tone="subdued">
                      Attiva questi controlli solo dopo aver verificato i dati. Da
                      spenti, il recesso è sempre accettato. Le regole di esclusione
                      si gestiscono nella pagina Esclusioni.
                    </Text>
                  </BlockStack>
                  <Checkbox
                    label="Blocca i recessi oltre il termine"
                    checked={enforceWindow}
                    onChange={setEnforceWindow}
                    helpText="Calcolato dalla data di consegna + i giorni sotto."
                  />
                  <TextField
                    label="Giorni di recesso"
                    type="number"
                    value={windowDays}
                    onChange={setWindowDays}
                    autoComplete="off"
                    min={1}
                    max={365}
                    disabled={!enforceWindow}
                  />
                  <Checkbox
                    label="Blocca i prodotti esclusi (Art. 59)"
                    checked={enforceExclusions}
                    onChange={setEnforceExclusions}
                    helpText="Blocca se l'intero ordine è escluso. Regole nella pagina Esclusioni."
                  />
                  {saveBtn}
                </BlockStack>
              </Card>
            ) : null}

            {tab === 3 ? (
              <BlockStack gap="400">
                <Card>
                  <BlockStack gap="400">
                    <BlockStack gap="100">
                      <Text as="h2" variant="headingMd">
                        Reso e stato ordine
                      </Text>
                      <Text as="p" tone="subdued">
                        Il riquadro nella ricevuta cambia in base allo stato.
                        Segnaposto nei testi:
                      </Text>
                      <InlineStack gap="200" wrap>
                        {OP_PLACEHOLDERS.map((p) => (
                          <Badge key={p}>{`{{${p}}}`}</Badge>
                        ))}
                      </InlineStack>
                    </BlockStack>
                    <Checkbox
                      label="Adatta la ricevuta allo stato dell'ordine"
                      checked={stateAwareEmail}
                      onChange={setStateAwareEmail}
                    />
                    <Checkbox
                      label="Annulla automaticamente gli ordini non ancora spediti"
                      checked={autoCancelUnfulfilled}
                      onChange={setAutoCancelUnfulfilled}
                      helpText="Al recesso, se l'ordine non è evaso: annullo + rimborso automatici. Irreversibile."
                    />
                    <Checkbox
                      label="Spese di restituzione a carico del cliente (Art. 57)"
                      checked={returnAtCustomerExpense}
                      onChange={setReturnAtCustomerExpense}
                      helpText="Determina il valore di {{returnCost}}."
                    />
                    <TextField
                      label="Indirizzo per il reso"
                      value={returnAddress}
                      onChange={setReturnAddress}
                      autoComplete="off"
                      multiline={2}
                      placeholder="Via ..., CAP Città (PR)"
                      helpText="Valore di {{returnAddress}}."
                    />
                    <TextField
                      label="Testo - ordine non evaso"
                      value={opTextUnfulfilled}
                      onChange={setOpTextUnfulfilled}
                      autoComplete="off"
                      multiline={3}
                    />
                    <TextField
                      label="Testo - ordine spedito/consegnato"
                      value={opTextShipped}
                      onChange={setOpTextShipped}
                      autoComplete="off"
                      multiline={4}
                    />
                    {saveBtn}
                  </BlockStack>
                </Card>
                <Card>
                  <BlockStack gap="300">
                    <Text as="h2" variant="headingMd">
                      Anteprima riquadro
                    </Text>
                    <Text as="p" tone="subdued">
                      Ordine non evaso
                    </Text>
                    {opFrame(previewOpUnf)}
                    <Text as="p" tone="subdued">
                      Ordine spedito/consegnato
                    </Text>
                    {opFrame(previewOpShip)}
                  </BlockStack>
                </Card>
              </BlockStack>
            ) : null}

            {tab === 4 ? (
              <Card>
                <BlockStack gap="400">
                  <BlockStack gap="100">
                    <Text as="h2" variant="headingMd">
                      Email (SMTP)
                    </Text>
                    <Text as="p" tone="subdued">
                      Vuoto = provider di default dell'app. Compila per inviare dal
                      tuo SMTP (email dal tuo dominio). La password è cifrata a
                      riposo.
                    </Text>
                  </BlockStack>
                  <TextField
                    label="Host SMTP"
                    value={smtpHost}
                    onChange={setSmtpHost}
                    autoComplete="off"
                    placeholder="smtp-relay.brevo.com"
                  />
                  <TextField
                    label="Porta"
                    type="number"
                    value={smtpPort}
                    onChange={setSmtpPort}
                    autoComplete="off"
                    placeholder="587"
                  />
                  <TextField
                    label="Utente"
                    value={smtpUser}
                    onChange={setSmtpUser}
                    autoComplete="off"
                  />
                  <TextField
                    label="Password"
                    type="password"
                    value={smtpPass}
                    onChange={setSmtpPass}
                    autoComplete="off"
                    helpText={
                      d.smtpPassSet
                        ? "Impostata. Lascia vuoto per non cambiarla."
                        : "Non impostata."
                    }
                  />
                  <Checkbox
                    label="Connessione sicura diretta (SSL/TLS)"
                    checked={smtpSecure}
                    onChange={setSmtpSecure}
                    helpText="Ignorato sulle porte standard: 465 usa sempre TLS diretto, 587 usa sempre STARTTLS. Vale solo su porte non standard."
                  />
                  <TextField
                    label="Mittente (From)"
                    value={smtpFrom}
                    onChange={setSmtpFrom}
                    autoComplete="off"
                    placeholder="Il tuo negozio <no-reply@tuodominio.it>"
                  />

                  {smtpHost && !smtpFrom ? (
                    <Banner tone="warning">
                      Host SMTP impostato ma mittente vuoto. Brevo (come quasi
                      tutti i provider) rifiuta un mittente non verificato:
                      compila "Mittente (From)" con un indirizzo verificato nel
                      tuo account.
                    </Banner>
                  ) : null}

                  <TextField
                    label="Destinatario dell'email di prova"
                    type="email"
                    value={testTo}
                    onChange={setTestTo}
                    autoComplete="off"
                    placeholder="tu@tuodominio.it"
                    helpText="La prova usa i valori qui sopra, anche se non ancora salvati."
                  />

                  <ButtonGroup>
                    <Button
                      variant="primary"
                      loading={saving}
                      onClick={handleSave}
                    >
                      Salva
                    </Button>
                    <Button loading={saving} onClick={handleTest}>
                      Invia email di prova
                    </Button>
                  </ButtonGroup>
                </BlockStack>
              </Card>
            ) : null}
          </BlockStack>
        </Layout.Section>
      </Layout>
    </Page>
  );
}