import type { InvoiceStatus, PaymentStatus } from "./types";

export type PaymentMode = "bank_transfer" | "upi" | "cash" | "cheque" | "other";

export const PAYMENT_MODES: { id: PaymentMode; label: string }[] = [
  { id: "bank_transfer", label: "Bank transfer" },
  { id: "upi", label: "UPI" },
  { id: "cash", label: "Cash" },
  { id: "cheque", label: "Cheque" },
  { id: "other", label: "Other" },
];

export const paymentModeLabel = (mode: string): string => PAYMENT_MODES.find((m) => m.id === mode)?.label ?? mode;

/** A payment as stored: amounts are integer paise. `amountPaise` is cash; `tdsPaise` is tax the client deducted. */
export interface Payment {
  id: number;
  invoiceId: number;
  paidOn: string;
  amountPaise: number;
  tdsPaise: number;
  mode: PaymentMode;
  reference: string;
  notes: string;
  createdAt: string;
  /** Payment Entry name on ERPNext once the payment was sent. */
  erpnextPaymentEntry?: string | null;
}

export type PaymentInput = Omit<Payment, "id" | "createdAt" | "erpnextPaymentEntry">;

type TagType = "red" | "green" | "blue" | "gray" | "warm-gray" | "cool-gray" | "purple";

/** What to show in the status column and badges: the cancelled state wins over payment state. */
export function statusBadge(status: InvoiceStatus, payment: PaymentStatus | undefined): { label: string; type: TagType } {
  if (status === "cancelled") return { label: "Cancelled", type: "gray" };
  if (status === "draft") return { label: "Draft", type: "warm-gray" };
  switch (payment) {
    case "paid":
      return { label: "Paid", type: "green" };
    case "partially_paid":
      return { label: "Partly paid", type: "blue" };
    case "overdue":
      return { label: "Overdue", type: "red" };
    default:
      return { label: "Unpaid", type: "cool-gray" };
  }
}