import { useEffect, useState } from 'react'

const COUNTRY_API_URL = import.meta.env.VITE_COUNTRY_API_URL
const FALLBACK_COUNTRY = 'PH'

/**
 * Detects the caller's ISO 3166-1 alpha-2 country code via VITE_COUNTRY_API_URL
 * (defaults to the free hosted https://api.country.is — self-hostable at
 * https://github.com/lineofflight/country). Falls back to FALLBACK_COUNTRY
 * if the endpoint is unset, unreachable, or returns no country.
 */
export function useDetectedCountry() {
  const [country, setCountry] = useState(FALLBACK_COUNTRY)

  useEffect(() => {
    if (!COUNTRY_API_URL) return

    let cancelled = false

    fetch(COUNTRY_API_URL)
      .then((res) => (res.ok ? res.json() : Promise.reject(res.status)))
      .then((data) => {
        if (!cancelled && data?.country) setCountry(data.country)
      })
      .catch(() => {})

    return () => {
      cancelled = true
    }
  }, [])

  return country
}