export type ExpenseType = 'PER_DIEM' | 'MILEAGE' | 'EXPENSES' | 'ON_CALL';

export const EXPENSE_TYPE: ExpenseType[] = ['PER_DIEM', 'MILEAGE', 'EXPENSES', 'ON_CALL',];
export const TYPES_WITH_MILEAGE_ONLY: Readonly<ExpenseType[]> = ['MILEAGE'];
export const TYPES_WITH_AMOUNT_ONLY: Readonly<ExpenseType[]> = ['PER_DIEM', 'EXPENSES', 'ON_CALL',];

export interface Expense {
    id:                  number;
    date:                string;    //YYYY-MM-DD
    type:                ExpenseType;
    amount:              number;
    mileage?:            number;
    comment:             string;
    supervisor_comment?: string;
    is_approved: boolean;
};

export const empty_expense: Expense = {
    id: -1,
    date: '',
    type: 'EXPENSES',
    amount: 0,
    comment: '',
    is_approved: false,
};

export const test_expenses: Expense[] = [
  {
    id: 201,
    date: '2025-01-06',
    type: 'EXPENSES',
    amount: 15.5,
    comment: 'Lunch receipt',
    is_approved: false,
  },
  {
    id: 202,
    date: '2025-01-07',
    type: 'MILEAGE',
    amount: 0,
    mileage: 32.4,
    comment: 'Travel to client site',
    is_approved: true,
  },
];