import { createContext, useContext, useState } from 'react';

const ReturnContext = createContext(null);

export function ReturnProvider({ children }) {
  const [returns, setReturns] = useState(() => {
    const saved = localStorage.getItem('returns');
    return saved ? JSON.parse(saved) : [];
  });

  function addReturn(bookId, bookTitle, customerPhone, reason) {
    const bookReturn = {
      returnId: crypto.randomUUID(),
      bookId,
      bookTitle,
      customerPhone,
      reason,
      status: 'PROCESSED',
      returnedAt: new Date().toISOString(),
    };
    const updated = [...returns, bookReturn];
    setReturns(updated);
    localStorage.setItem('returns', JSON.stringify(updated));
    return bookReturn;
  }

  return (
    <ReturnContext.Provider value={{ returns, addReturn }}>
      {children}
    </ReturnContext.Provider>
  );
}

export function useReturns() {
  return useContext(ReturnContext);
}