import { useState, useCallback } from 'react'
import { AuthContext } from './AuthContext.js'

const STORAGE_KEY = 'pa_auth'

function loadSession() {
  try {
    const raw = sessionStorage.getItem(STORAGE_KEY)
    return raw ? JSON.parse(raw) : null
  } catch {
    return null
  }
}

export default function AuthProvider({ children }) {
  const [session, setSession] = useState(loadSession)

  const login = useCallback((accessToken, user) => {
    const next = { accessToken, user }
    setSession(next)
    try {
      sessionStorage.setItem(STORAGE_KEY, JSON.stringify(next))
    } catch {
      /* storage unavailable — keep in memory only */
    }
  }, [])

  const logout = useCallback(() => {
    setSession(null)
    try {
      sessionStorage.removeItem(STORAGE_KEY)
    } catch {
      /* ignore */
    }
  }, [])

  const value = {
    accessToken: session?.accessToken ?? null,
    user: session?.user ?? null,
    isAuthenticated: Boolean(session?.accessToken),
    login,
    logout,
  }

  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>
}