import type {
  Vendor,
  VendorDeactivationImpact,
  VendorFacetCompany,
  VendorFacetJobBucket,
  VendorFacetLocation,
  VendorFacets,
  VendorListItem,
  VendorOpenWorkOrderSummary,
  VendorPortalToken,
  VendorPreferredContact,
} from "@/domain/vendors/types/vendor";

const PREFERRED_CONTACT_VALUES = new Set<VendorPreferredContact>(["Phone", "Email", "Text"]);

function asRecord(raw: unknown): Record<string, unknown> {
  return typeof raw === "object" && raw !== null ? (raw as Record<string, unknown>) : {};
}

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 readNumber(record: Record<string, unknown>, ...keys: string[]): number {
  for (const key of keys) {
    const value = record[key];
    if (typeof value === "number" && Number.isFinite(value)) return value;
    if (typeof value === "string") {
      const parsed = Number(value);
      if (Number.isFinite(parsed)) return parsed;
    }
  }
  return 0;
}

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

function readCompanyId(record: Record<string, unknown>): string | number | null {
  const value = record.companyId ?? record.CompanyId;
  if (typeof value === "string") return value.trim() === "" ? null : value;
  if (typeof value === "number" && Number.isFinite(value)) return value;
  return null;
}

function readNumericCompanyId(record: Record<string, unknown>): number | null {
  const value = readCompanyId(record);
  if (typeof value === "number") return value;
  if (typeof value !== "string" || value.trim() === "") return null;
  const parsed = Number(value);
  return Number.isInteger(parsed) && parsed > 0 ? parsed : null;
}

function readPreferredContact(
  record: Record<string, unknown>,
  ...keys: string[]
): VendorPreferredContact {
  for (const key of keys) {
    const value = record[key];
    if (typeof value === "string") {
      const normalized = value.trim();
      if (PREFERRED_CONTACT_VALUES.has(normalized as VendorPreferredContact)) {
        return normalized as VendorPreferredContact;
      }
      const lowered = normalized.toLowerCase();
      if (lowered === "phone" || lowered === "call") return "Phone";
      if (lowered === "email" || lowered === "e-mail") return "Email";
      if (lowered === "text" || lowered === "sms") return "Text";
    }
  }
  return "Phone";
}

function readPreferredContactOptional(
  record: Record<string, unknown>,
): VendorPreferredContact | undefined {
  const raw = record.preferredContact ?? record.PreferredContact;
  if (typeof raw !== "string" || raw.trim() === "") return undefined;
  return readPreferredContact(record, "preferredContact", "PreferredContact");
}

export function toCanonicalPhone(value: unknown): string {
  const original = String(value ?? "");
  let digits = original.replace(/\D+/g, "");
  if (digits.length === 11 && digits.startsWith("1")) {
    digits = digits.slice(1);
  }
  if (digits.length !== 10) return original;
  return `(${digits.slice(0, 3)}) ${digits.slice(3, 6)}-${digits.slice(6)}`;
}

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

export function mapVendorListItem(raw: unknown): VendorListItem {
  const item = asRecord(raw);
  return {
    id: readId(item),
    companyId: readCompanyId(item),
    companyName: readString(item, "companyName", "CompanyName"),
    contactName: readString(item, "contactName", "ContactName"),
    email: readString(item, "email", "Email"),
    phone: readString(item, "phone", "Phone"),
    companyPhone: readString(item, "companyPhone", "CompanyPhone"),
    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
    notes: readString(item, "notes", "Notes"),
    totalJobs: readNumber(item, "totalJobs", "TotalJobs"),
    address: readString(item, "address", "Address"),
    city: readString(item, "city", "City"),
    state: readString(item, "state", "State"),
    tradeSpecialties: readString(item, "tradeSpecialties", "TradeSpecialties"),
    isActive: readBool(item, "isActive", "IsActive"),
    preferredContact: readPreferredContact(item, "preferredContact", "PreferredContact"),
  };
}

export function mapVendorListItems(rawItems: unknown[]): VendorListItem[] {
  return rawItems.map(mapVendorListItem);
}

export function mapVendor(raw: unknown): Vendor {
  const item = asRecord(raw);
  return {
    id: readId(item) || undefined,
    companyId: readCompanyId(item),
    companyName: readString(item, "companyName", "CompanyName"),
    contactName: readString(item, "contactName", "ContactName"),
    email: readString(item, "email", "Email"),
    phone: readString(item, "phone", "Phone"),
    companyPhone: readString(item, "companyPhone", "CompanyPhone"),
    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
    notes: readString(item, "notes", "Notes"),
    totalJobs: readNumber(item, "totalJobs", "TotalJobs"),
    address: readString(item, "address", "Address"),
    city: readString(item, "city", "City"),
    state: readString(item, "state", "State"),
    zip: readString(item, "zip", "Zip", "zipCode", "ZipCode"),
    tradeSpecialties: readString(item, "tradeSpecialties", "TradeSpecialties"),
    isActive: readBool(item, "isActive", "IsActive"),
    preferredContact: readPreferredContact(item, "preferredContact", "PreferredContact"),
  };
}

export function mapVendorToBackend(vendor: unknown): Record<string, unknown> {
  const item = asRecord(vendor);
  const companyName = readString(item, "companyName", "CompanyName");
  const payload: Record<string, unknown> = {
    companyId: readNumericCompanyId(item),
    companyName,
    contactName: readString(item, "contactName", "ContactName"),
    email: readString(item, "email", "Email"),
    phone: toCanonicalPhone(item.phone ?? item.Phone),
    companyPhone: toCanonicalPhone(item.companyPhone ?? item.CompanyPhone),
    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
    notes: readString(item, "notes", "Notes"),
    address: readString(item, "address", "Address"),
    city: readString(item, "city", "City"),
    state: readString(item, "state", "State"),
    zip: readString(item, "zip", "Zip", "zipCode", "ZipCode"),
    tradeSpecialties: readString(item, "tradeSpecialties", "TradeSpecialties"),
    isActive: readBool(item, "isActive", "IsActive"),
  };
  const preferredContact = readPreferredContactOptional(item);
  if (preferredContact) {
    payload.preferredContact = preferredContact;
  }
  const id = item.id ?? item.Id;
  if (typeof id === "string" || typeof id === "number") {
    payload.id = id;
  }
  return payload;
}

export function mapVendorUpdateToBackend(vendor: unknown): Record<string, unknown> {
  const item = asRecord(vendor);
  const payload: Record<string, unknown> = {};
  const fieldMappings = [
    ["companyName", "CompanyName"],
    ["contactName", "ContactName"],
    ["email", "Email"],
    ["googleMapsUrl", "GoogleMapsUrl"],
    ["notes", "Notes"],
    ["address", "Address"],
    ["city", "City"],
    ["state", "State"],
    ["zip", "Zip"],
    ["tradeSpecialties", "TradeSpecialties"],
    ["isActive", "IsActive"],
    ["preferredContact", "PreferredContact"],
  ] as const;

  fieldMappings.forEach(([target, source]) => {
    if (Object.prototype.hasOwnProperty.call(item, target)) payload[target] = item[target];
    if (Object.prototype.hasOwnProperty.call(item, source)) payload[target] = item[source];
  });
  if (
    Object.prototype.hasOwnProperty.call(item, "companyId") ||
    Object.prototype.hasOwnProperty.call(item, "CompanyId")
  ) {
    payload.companyId = readNumericCompanyId(item);
  }
  if (
    Object.prototype.hasOwnProperty.call(item, "phone") ||
    Object.prototype.hasOwnProperty.call(item, "Phone")
  ) {
    payload.phone = toCanonicalPhone(item.phone ?? item.Phone);
  }
  if (
    Object.prototype.hasOwnProperty.call(item, "companyPhone") ||
    Object.prototype.hasOwnProperty.call(item, "CompanyPhone")
  ) {
    payload.companyPhone = toCanonicalPhone(item.companyPhone ?? item.CompanyPhone);
  }
  return payload;
}

function mapFacetCompany(raw: unknown): VendorFacetCompany {
  const item = asRecord(raw);
  return {
    companyId: readCompanyId(item),
    name: readString(item, "name", "Name"),
    companyPhone: readString(item, "companyPhone", "CompanyPhone"),
    email: readString(item, "email", "Email"),
    address: readString(item, "address", "Address"),
    city: readString(item, "city", "City"),
    state: readString(item, "state", "State"),
    zip: readString(item, "zip", "Zip", "zipCode", "ZipCode"),
    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
  };
}

function mapFacetLocation(raw: unknown): VendorFacetLocation {
  const item = asRecord(raw);
  const city = readString(item, "city", "City");
  const state = readString(item, "state", "State");
  const label = readString(item, "label", "Label");
  return {
    city,
    state,
    label: label || [city, state].filter(Boolean).join(", "),
  };
}

function mapFacetJobBucket(raw: unknown): VendorFacetJobBucket {
  const item = asRecord(raw);
  return {
    id: readString(item, "id", "Id"),
    label: readString(item, "label", "Label"),
  };
}

export function mapVendorFacets(raw: unknown): VendorFacets {
  const item = asRecord(raw);
  const companiesRaw = item.companies ?? item.Companies;
  const tradesRaw = item.trades ?? item.Trades;
  const locationsRaw = item.locations ?? item.Locations;
  const jobBucketsRaw = item.jobBuckets ?? item.JobBuckets;

  return {
    companies: Array.isArray(companiesRaw) ? companiesRaw.map(mapFacetCompany) : [],
    trades: Array.isArray(tradesRaw)
      ? tradesRaw
          .map((entry) => {
            if (typeof entry === "string") return entry;
            return readString(asRecord(entry), "name", "Name", "value", "Value", "label", "Label");
          })
          .filter(Boolean)
      : [],
    locations: Array.isArray(locationsRaw) ? locationsRaw.map(mapFacetLocation) : [],
    jobBuckets: Array.isArray(jobBucketsRaw) ? jobBucketsRaw.map(mapFacetJobBucket) : [],
  };
}

export function mapVendorPortalToken(raw: unknown): VendorPortalToken | null {
  const item = asRecord(raw);
  const portalUrl = readString(item, "portalUrl", "PortalUrl");
  if (!portalUrl) return null;
  return {
    portalUrl,
    issuedAt: readString(item, "issuedAt", "IssuedAt"),
    expiresAt: readString(item, "expiresAt", "ExpiresAt"),
    lastUsedAt: readString(item, "lastUsedAt", "LastUsedAt") || undefined,
  };
}

function mapOpenWorkOrder(raw: unknown): VendorOpenWorkOrderSummary {
  const item = asRecord(raw);
  const workOrderId = item.workOrderId ?? item.WorkOrderId;
  const dispatchId = item.dispatchId ?? item.DispatchId;
  return {
    workOrderId:
      typeof workOrderId === "string" || typeof workOrderId === "number" ? workOrderId : "",
    workOrderNumber: readString(item, "workOrderNumber", "WorkOrderNumber"),
    workOrderTitle: readString(item, "workOrderTitle", "WorkOrderTitle"),
    status: readString(item, "status", "Status"),
    scheduledDate: readString(item, "scheduledDate", "ScheduledDate") || undefined,
    dispatchId:
      typeof dispatchId === "string" || typeof dispatchId === "number" ? dispatchId : undefined,
  };
}

export function mapVendorDeactivationImpact(raw: unknown): VendorDeactivationImpact {
  const item = asRecord(raw);
  const openWorkOrdersRaw = item.openWorkOrders ?? item.OpenWorkOrders;
  const rawId = item.vendorId ?? item.VendorId ?? item.id ?? item.Id;
  const vendorId: string | number =
    typeof rawId === "string" || typeof rawId === "number" ? rawId : "";
  return {
    vendorId,
    canDeactivate: readBool(item, "canDeactivate", "CanDeactivate"),
    openWorkOrders: Array.isArray(openWorkOrdersRaw) ? openWorkOrdersRaw.map(mapOpenWorkOrder) : [],
  };
}