import type {
  Location,
  LocationContact,
  LocationListItem,
  LocationSite,
} from "@/domain/locations/types/location";

function readString(record: Record<string, unknown>, ...keys: string[]): string {
  for (const key of keys) {
    const value = record[key];
    if (typeof value === "string") {
      return value;
    }
    if (typeof value === "number") {
      return String(value);
    }
  }
  return "";
}

function readId(record: Record<string, unknown>): string | number {
  const value = record.id ?? record.Id;
  if (typeof value === "string" || typeof value === "number") {
    return value;
  }
  return "";
}

function readOptionalId(record: Record<string, unknown>): string | number {
  const value = record.accountId ?? record.AccountId;
  if (typeof value === "string" || typeof value === "number") {
    return value;
  }
  return "";
}

export function formatLocationSiteLabel(
  site: Pick<LocationSite, "code" | "city" | "state">,
): string {
  const place = [site.city, site.state].filter(Boolean).join(", ");
  if (site.code && place) {
    return `${site.code} · ${place}`;
  }
  return site.code || place || "";
}

/** Table cell label: `BK5 . Dallas, TX` (period separator). */
export function formatSiteTableLabel(params: {
  code?: string;
  city?: string;
  state?: string;
  fallbackLocation?: string;
}): string {
  const code = params.code?.trim() ?? "";
  const place =
    [params.city, params.state].filter(Boolean).join(", ") ||
    (params.fallbackLocation?.trim() ?? "");
  if (code && place) {
    return `${code} . ${place}`;
  }
  return code || place || "";
}

export function formatSitePlace(city?: string, state?: string, fallbackLocation = ""): string {
  return [city, state].filter(Boolean).join(", ") || fallbackLocation.trim() || "";
}

/** Wizard preview: `3811 Distribution Dr, Dallas, TX 70068` */
export function formatLocationAddressPreview(
  location: Pick<Location, "address" | "city" | "state" | "zipCode">,
): string {
  const street = location.address?.trim() ?? "";
  const city = location.city?.trim() ?? "";
  const stateZip = [location.state?.trim(), location.zipCode?.trim()].filter(Boolean).join(" ");
  const cityStateZip = [city, stateZip].filter(Boolean).join(", ");

  if (street && cityStateZip) {
    return `${street}, ${cityStateZip}`;
  }
  return street || cityStateZip || "";
}

export function mapLocationSite(raw: unknown): LocationSite {
  const item = (typeof raw === "object" && raw !== null ? raw : {}) as Record<string, unknown>;

  return {
    id: readId(item),
    code: readString(item, "code", "Code", "siteCode", "SiteCode"),
    city: readString(item, "city", "City"),
    state: readString(item, "state", "State"),
  };
}

export function mapLocationSites(rawItems: unknown[]): LocationSite[] {
  return rawItems.map(mapLocationSite);
}

/** Reads the additive contacts array; returns [] when absent or malformed. */
export function mapLocationContacts(raw: unknown): LocationContact[] {
  if (!Array.isArray(raw)) {
    return [];
  }
  return raw.map((entry) => {
    const item = (typeof entry === "object" && entry !== null ? entry : {}) as Record<
      string,
      unknown
    >;
    const id = item.id ?? item.Id;
    return {
      ...(typeof id === "number" && Number.isInteger(id) && id > 0 ? { id } : {}),
      name: readString(item, "name", "Name", "contact", "Contact"),
      phone: readString(item, "phone", "Phone"),
    };
  });
}

export function mapLocationListItem(raw: unknown): LocationListItem {
  const item = (typeof raw === "object" && raw !== null ? raw : {}) as Record<string, unknown>;

  const contacts = mapLocationContacts(item.contacts ?? item.Contacts);
  const mainContact = contacts[0];

  return {
    id: readId(item),
    name: readString(item, "name", "Name"),
    clientName: readString(item, "clientName", "ClientName", "accountName", "AccountName"),
    sitePhone: readString(item, "phone", "Phone"),
    address: readString(item, "address", "Address"),
    city: readString(item, "city", "City"),
    state: readString(item, "state", "State"),
    zipCode: readString(item, "zipCode", "ZipCode", "Zip"),
    phone: mainContact ? mainContact.phone : readString(item, "phone", "Phone"),
    contact: mainContact
      ? mainContact.name
      : readString(item, "contact", "Contact", "contactPerson", "ContactPerson"),
    contactEmail: readString(item, "contactEmail", "ContactEmail"),
    status: readString(item, "status", "Status"),
    accountId: readOptionalId(item),
    contacts: contacts.length > 0 ? contacts : undefined,
  };
}

export function mapLocationListItems(rawItems: unknown[]): LocationListItem[] {
  return rawItems.map(mapLocationListItem);
}

export function mapLocation(raw: unknown): Location {
  const item = (typeof raw === "object" && raw !== null ? raw : {}) as Record<string, unknown>;

  const address =
    readString(item, "address", "Address") ||
    [readString(item, "address1", "Address1"), readString(item, "address2", "Address2")]
      .filter(Boolean)
      .join(", ") ||
    undefined;

  const contacts = mapLocationContacts(item.contacts ?? item.Contacts);
  const mainContact = contacts[0];
  const legacyPhone = readString(item, "phone", "Phone") || undefined;
  const legacyContact =
    readString(item, "contact", "Contact", "contactPerson", "ContactPerson") || undefined;

  return {
    id: readId(item) || undefined,
    name: readString(item, "name", "Name") || undefined,
    title: readString(item, "title", "Title") || undefined,
    clientName:
      readString(item, "clientName", "ClientName", "accountName", "AccountName") || undefined,
    sitePhone: legacyPhone,
    notes: readString(item, "notes", "Notes") || undefined,
    address: address || undefined,
    city: readString(item, "city", "City") || undefined,
    state: readString(item, "state", "State") || undefined,
    zipCode: readString(item, "zipCode", "ZipCode", "Zip") || undefined,
    phone: mainContact ? mainContact.phone : legacyPhone,
    contact: mainContact ? mainContact.name : legacyContact,
    contactEmail: readString(item, "contactEmail", "ContactEmail") || undefined,
    status: readString(item, "status", "Status") || undefined,
    accountId: readOptionalId(item) || undefined,
    contacts: contacts.length > 0 ? contacts : undefined,
  };
}

/** Request payload contacts: trimmed, in displayed order. */
export function mapContactsToBackend(raw: unknown): LocationContact[] {
  if (!Array.isArray(raw)) {
    return [];
  }
  return raw
    .map((entry) => {
      const item = (typeof entry === "object" && entry !== null ? entry : {}) as Record<
        string,
        unknown
      >;
      return {
        ...(typeof item.id === "number" && Number.isInteger(item.id) && item.id > 0
          ? { id: item.id }
          : {}),
        name: readString(item, "name", "Name", "contact", "Contact").trim(),
        phone: readString(item, "phone", "Phone").trim(),
      };
    })
    .filter((contact) => contact.name !== "" || contact.phone !== "");
}

/**
 * Create/update payload. `phone` is the Site Phone (independent of the contacts); `status`,
 * `title` and `notes` are sent only when present so an update keeps the stored values.
 */
export function mapLocationToBackend(location: unknown): Record<string, unknown> {
  const item = (typeof location === "object" && location !== null ? location : {}) as Record<
    string,
    unknown
  >;

  const contacts = mapContactsToBackend(item.contacts ?? item.Contacts);
  const mainContact = contacts[0];

  const payload: Record<string, unknown> = {
    name: typeof item.name === "string" ? item.name.trim() : "",
    address: item.address ?? "",
    city: item.city ?? "",
    state: item.state ?? "",
    zipCode: item.zipCode ?? "",
    phone: typeof item.sitePhone === "string" ? item.sitePhone.trim() : "",
    contact: mainContact ? mainContact.name : "",
    contactEmail: typeof item.contactEmail === "string" ? item.contactEmail.trim() : "",
    accountId: item.accountId ?? "",
    contacts,
  };

  for (const key of ["status", "title", "notes"] as const) {
    if (typeof item[key] === "string") {
      payload[key] = item[key];
    }
  }

  const id = item.id ?? item.Id;
  if (typeof id === "string" || typeof id === "number") {
    payload.id = id;
  }

  return payload;
}