import { createTenantCustomer } from 'pages/api/doormileApi';

// ==============================|| Doormile AI — write actions ||============================== //
//
// The FIRST write capability in the assistant. Read the rules before adding
// another one.
//
// The contract (assistant/CLAUDE.md §4): an intent never mutates. It returns a
// PROPOSAL — the exact payload it would submit — and nothing reaches the API
// until the operator presses Create in the panel. Parsing, validation and
// execution are separated here so the proposal can be built, shown and
// discarded without any possibility of a request going out.
//
// Customer creation was chosen as the first write deliberately: it needs two
// required fields where an order needs fourteen, it has no CityGate pincode
// gate, no geocoding and no delivery slot, and a wrong record is an edit
// rather than a rider dispatched to the wrong address.

// "create a customer", "add new client" — an explicit verb + noun. Deliberately
// narrow: nothing here should fire on a question that merely mentions customers.
export const CREATE_CUSTOMER_TRIGGER = /\b(?:create|add|register|new)\s+(?:a\s+|an\s+|the\s+)?(?:new\s+)?(?:customer|client)\b/i;

// Words that are part of the instruction rather than the person's name.
const FILLER =
  /\b(?:create|add|register|new|a|an|the|customer|client|named|called|with|phone|number|mobile|contact|no|email|id|please)\b/gi;

// Pulls what it can out of free text. Anything it can't find stays undefined
// and is asked for — never guessed.
export const parseCustomerDraft = (text) => {
  const raw = String(text || '');

  const email = (raw.match(/[\w.+-]+@[\w-]+\.[\w.]{2,}/) || [])[0];

  // Exactly ten digits, standalone. A longer run is not a phone number and
  // must not be silently truncated into one.
  const phone = (raw.match(/(?<!\d)(\d{10})(?!\d)/) || [])[1];

  // Whatever is left after removing the instruction, the phone and the email
  // is the person's name.
  let nameArea = raw;
  if (email) nameArea = nameArea.replace(email, ' ');
  if (phone) nameArea = nameArea.replace(phone, ' ');
  const nameWords = nameArea
    .replace(FILLER, ' ')
    .replace(/[^A-Za-z .'-]/g, ' ')
    .split(/\s+/)
    .filter((w) => w.length > 1);

  return {
    firstname: nameWords[0],
    lastname: nameWords.slice(1).join(' ') || undefined,
    phone,
    email
  };
};

// Mirrors createCustomer.js's own checks — a name, and a phone of exactly ten
// digits. If the form would refuse it, the assistant refuses it too, rather
// than letting the server decide.
//
// No tenant check: a customer record carries no tenantid, and the documented
// POST body doesn't take one. The page's own `isStaffLogin && !tid` guard
// exists because its dropdown sends a speculative tenantid; the assistant
// doesn't send one at all.
export const validateCustomerDraft = (draft) => {
  const missing = [];
  if (!draft.firstname) missing.push('the customer’s name');
  if (!draft.phone || !/^\d{10}$/.test(String(draft.phone))) missing.push('a 10-digit mobile number');
  return { ok: missing.length === 0, missing };
};

// The exact body that will be POSTed.
//
// Documented body for POST /admin/tenantcustomers is
// { firstname, lastname, phone, email } — and a customer record carries NO
// tenantid, which is why the tenant field was removed. A real
// GET /admin/customers response does carry address, doorno, landmark, suburb,
// city, state, postcode, latitude and longitude, so those are sent on a
// best-effort basis: empty strings are dropped rather than sent as noise, and
// if the server ignores the rest nothing breaks.
const clean = (obj) => Object.fromEntries(Object.entries(obj).filter(([, v]) => v !== undefined && v !== null && v !== ''));

export const buildCustomerPayload = (draft) =>
  clean({
    firstname: draft.firstname,
    lastname: draft.lastname || '',
    phone: draft.phone,
    email: draft.email || '',
    address: draft.address,
    doorno: draft.doorno,
    landmark: draft.landmark,
    suburb: draft.suburb,
    city: draft.city,
    state: draft.state,
    postcode: draft.postcode,
    latitude: draft.latitude,
    longitude: draft.longitude
  });

// The ONLY function in the assistant that mutates anything. Called exclusively
// from the panel's confirm handler — never from an intent's run().
//
// ---- Which endpoint, and why -----------------------------------------------
//
// Writes to POST /admin/tenantcustomers. This is now settled by evidence, not
// by reading the docs:
//
//   POST /admin/customers  →  405 Method Not Allowed  (confirmed live)
//
// 405 is the unambiguous answer: the route exists, and POST is not among its
// methods. express-console-api.md lists /admin/customers as GET + PATCH only,
// and the server agrees. It was pointed there briefly on explicit instruction;
// the live 405 settled it.
//
// The consequence, which the assistant states in its success message rather
// than leaving the operator to discover: a customer created here does NOT
// appear on the Customers page, because that page reads GET /admin/customers.
// On that resource a customer comes into existence as a side effect of a
// booking — POST /admin/expressbooking documents `customer_phone` as "creates a
// Guest customer if unknown". A B2C customer is, by design, someone who has
// ordered.
//
// To make created customers visible on that page, one of these has to happen:
//   • the Customers page reads /admin/tenantcustomers (tried once, reverted —
//     it changes what that page means, and its edit dialog would then PATCH a
//     different store by id), or
//   • the backend adds POST /admin/customers.
//
// The payload keeps the address fields. The documented body is
// { firstname, lastname, phone, email }; the rest are sent best-effort and
// ignored if unsupported.
export const executeCreateCustomer = async (payload) => {
  const started = Date.now();
  const call = {
    name: 'createTenantCustomer',
    target: 'POST /admin/tenantcustomers',
    stats: Object.keys(payload).join(', ')
  };

  try {
    const res = await createTenantCustomer(payload);
    const duration = `${Date.now() - started}ms`;

    // doormileApi mutations return the full envelope, so a `success: false`
    // arrives as a resolved promise, not a rejection.
    if (res && res.success === false) {
      return {
        ok: false,
        message: res.message || 'The server rejected the customer.',
        sourceCalls: [{ ...call, duration, status: 'error', errorMessage: res.message || 'Rejected' }]
      };
    }

    const created = res?.data || res;
    return {
      ok: true,
      id: created?.appcustomerid ?? created?.customerid ?? created?.id,
      created,
      message: 'Customer created.',
      sourceCalls: [{ ...call, duration, status: 'complete', stats: `created id ${created?.appcustomerid ?? created?.id ?? '—'}` }]
    };
  } catch (err) {
    // An HTTP failure used to throw straight past this function, and the panel
    // printed a generic "could not be created" with the status thrown away —
    // which is the one detail needed to tell "the route does not exist" apart
    // from "the body was wrong". Report the status, the server's own message,
    // and name the endpoint.
    const duration = `${Date.now() - started}ms`;
    // doormileAxios rejects with the response BODY, not the axios error, so
    // `err.response` is undefined here — the status arrives as `err.httpStatus`.
    const status = err.httpStatus ?? err.response?.status;
    const serverMessage = err.message || err.error;

    let message;
    if (status === 405) {
      // 405 is "the route exists but not this method" — a different fact from
      // 404, and worth stating precisely so nobody re-tries the same call.
      message = 'POST /admin/tenantcustomers returned 405 — this endpoint does not accept a create. Nothing was saved.';
    } else if (status === 404) {
      message = 'POST /admin/tenantcustomers returned 404 — that route is not on the server. Nothing was saved.';
    } else if (status === 400 || status === 422) {
      message = `The server rejected the details${serverMessage ? ` — ${serverMessage}` : ''}. Nothing was saved.`;
    } else if (status) {
      message = `POST /admin/tenantcustomers returned ${status}${serverMessage ? ` — ${serverMessage}` : ''}. Nothing was saved.`;
    } else {
      message = `${err.message || 'The request failed'} — the server could not be reached. Nothing was saved.`;
    }

    return {
      ok: false,
      status,
      // The server's own reason, unformatted, for callers that word the
      // message themselves (the home page's plain-language toasts).
      serverMessage,
      message,
      sourceCalls: [
        {
          ...call,
          duration,
          status: 'error',
          errorMessage: `${status || 'network'}${serverMessage ? ` · ${serverMessage}` : ''}`
        }
      ]
    };
  }
};