/**
 * TypeScript types for the expenses module.
 */

export interface ExpenseCategory {
  id: string;
  organisation_id: string;
  name: string;
  color: string;
  created_at: string;
}

export type ExpenseStatus = "draft" | "submitted" | "approved" | "rejected" | "reimbursed";

export interface Expense {
  id: string;
  organisation_id: string;
  category_id: string | null;
  employee_id: string | null;
  amount: number;
  currency: string;
  vendor: string | null;
  description: string | null;
  expense_date: string;
  status: ExpenseStatus;
  receipt_url: string | null;
  created_by: string | null;
  created_at: string;
  updated_at: string;
}

export interface ExpenseWithCategory extends Expense {
  category: { name: string; color: string } | null;
  employee: { first_name: string; last_name: string } | null;
}

export const STATUS_LABELS: Record<ExpenseStatus, string> = {
  draft: "Draft",
  submitted: "Submitted",
  approved: "Approved",
  rejected: "Rejected",
  reimbursed: "Reimbursed",
};

export const STATUS_COLORS: Record<ExpenseStatus, string> = {
  draft: "bg-gray-100 text-gray-600 border-gray-200",
  submitted: "bg-amber-100 text-amber-700 border-amber-200",
  approved: "bg-blue-100 text-blue-700 border-blue-200",
  rejected: "bg-red-100 text-red-700 border-red-200",
  reimbursed: "bg-emerald-100 text-emerald-700 border-emerald-200",
};

export function formatCurrency(amount: number, currency = "AUD"): string {
  const symbols: Record<string, string> = {
    USD: "$", AUD: "A$", GBP: "£", CAD: "C$", NZD: "NZ$",
    EUR: "€", INR: "₹", SGD: "S$", JPY: "¥",
  };
  const sym = symbols[currency] || "$";
  return `${sym}${amount.toLocaleString(undefined, { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`;
}

export function formatDateShort(dateStr: string): string {
  const d = new Date(dateStr + "T00:00:00");
  return d.toLocaleDateString("en-AU", { day: "numeric", month: "short", year: "numeric" });
}