client/src/pages/sharedTrip/useSharedTrip.ts

import { useState, useEffect } from 'react'
import { useParams } from 'react-router-dom'
import { shareApi } from '../../api/client'

/**
 * Shared-trip (public) data hook — owns the token lookup, the read-only share
 * fetch and the view state (selected day, active tab, language picker).
 * SharedTripPage is a pure wiring container; the post-load derivations
 * (sortedDays, map places, …) stay in the page next to the JSX that uses them.
 * Behaviour is identical to the previous in-component logic.
 */
export function useSharedTrip() {
  const { token } = useParams<{ token: string }>()
  // The shared payload is an open-ended snapshot (trip, days, assignments, …),
  // matched 1:1 from the public share endpoint — kept loosely typed as before.
  const [data, setData] = useState<any>(null)
  const [error, setError] = useState(false)
  const [selectedDay, setSelectedDay] = useState<number | null>(null)
  const [activeTab, setActiveTab] = useState('plan')
  const [showLangPicker, setShowLangPicker] = useState(false)

  useEffect(() => {
    if (!token) return
    shareApi.getSharedTrip(token).then(setData).catch(() => setError(true))
  }, [token])

  return { data, error, selectedDay, setSelectedDay, activeTab, setActiveTab, showLangPicker, setShowLangPicker }
}