export interface Cabin {
  id: number;
  name: string;
  capacity: number | null;
  sort_order: number;
}

export type ReservationStatus = "confirmed" | "option";

export interface Reservation {
  id: number;
  cabin_id: number;
  guest_name: string;
  address: string | null;
  phone: string | null;
  num_guests: number | null;
  deposit_amount: number | null;
  deposit_paid: boolean;
  status: ReservationStatus;
  /** Data przyjazdu w formacie YYYY-MM-DD */
  arrival: string;
  /** Data wyjazdu w formacie YYYY-MM-DD */
  departure: string;
  notes: string | null;
  /** Cena za dobę w zł */
  price_per_night: number | null;
  /** Stan licznika energii na początku pobytu (kWh) */
  meter_start: number | null;
  /** Stan licznika energii na końcu pobytu (kWh) */
  meter_end: number | null;
  guest_id: number | null;
  /** Czy pobyt został rozliczony z gościem */
  settled: boolean;
  created_at: string;
}

export type ReservationInput = Omit<Reservation, "id" | "created_at">;

/** Parametry otwarcia dialogu rezerwacji: edycja istniejącej albo nowa w danym domku i terminie. */
export type ReservationDialogParams =
  | { reservation: Reservation }
  | { cabin_id: number; arrival: string };

// --- Faktury ---

export interface Settings {
  id: number;
  company_name: string;
  first_name: string;
  last_name: string;
  address: string;
  nip: string | null;
  bank_account: string;
  bank_name: string;
  issue_place: string;
  default_pkwiu: string;
  default_vat_rate: number;
  /** Cena energii zł/kWh do rozliczania liczników */
  energy_price: number | null;
}

export type PaymentMethod = "CASH" | "CARD" | "CARD_CASH" | "SEND";

export interface Invoice {
  id: number;
  invoice_number: string;
  reservation_id: number | null;
  issue_date: string;
  sale_date: string;
  payment_method: PaymentMethod;
  payment_card: number | null;
  payment_cash: number | null;
  payment_due: string;
  buyer_name: string;
  buyer_address: string | null;
  buyer_nip: string | null;
  seller_company: string;
  seller_person: string;
  seller_address: string;
  seller_nip: string | null;
  seller_bank_account: string;
  seller_bank_name: string;
  issue_place: string;
  created_at: string;
}

export interface InvoiceItem {
  id: number;
  invoice_id: number;
  name: string;
  pkwiu: string | null;
  quantity: number;
  /** Cena jednostkowa brutto (VAT liczony od brutto, jak w starym systemie) */
  unit_price: number;
  vat_rate: number;
  position: number;
}

export type InvoiceItemInput = Omit<InvoiceItem, "id" | "invoice_id" | "position">;
export type InvoiceInput = Omit<Invoice, "id" | "created_at">;

/** Parametry dialogu faktury: edycja istniejącej, nowa z pobytu albo pusta. */
export type InvoiceDialogParams =
  | { invoice: Invoice; items: InvoiceItem[] }
  | { reservation: Reservation }
  | { blank: true };

/** Statystyki przychodu w zakresie dat (noclegi liczone tylko w zakresie). */
export interface RevenueStats {
  nights_total: number;
  revenue_total: number;
  nights_confirmed: number;
  revenue_confirmed: number;
}

// --- Goście ---

export interface Guest {
  id: number;
  name: string;
  address: string | null;
  phone: string | null;
  notes: string | null;
  created_at: string;
}

/** Wiersz listy gości z agregacją pobytów. */
export interface GuestListRow extends Guest {
  stay_count: number;
  last_departure: string | null;
}

// --- Cennik sezonowy ---

export interface PriceSeason {
  id: number;
  /** null = obowiązuje wszystkie domki */
  cabin_id: number | null;
  /** Zakres [date_from, date_to) */
  date_from: string;
  date_to: string;
  price: number;
}

export type PriceSeasonInput = Omit<PriceSeason, "id">;

// --- Raporty ---

export interface CabinReport extends RevenueStats {
  cabin_id: number;
}