package handlers

import (
	"log"
	"os"
	"strings"
)

func IsAllowedRedirectURI(uri string) bool {
	allowedRedirectURIsEnv := os.Getenv("ALLOWED_REDIRECT_URIS")
	log.Print("Checking redirect URI: ", uri)
	log.Print("Allowed Redirect URIs (raw): ", allowedRedirectURIsEnv)

	if allowedRedirectURIsEnv == "" {
		log.Print("ERROR: ALLOWED_REDIRECT_URIS environment variable is empty")
		return false
	}

	allowedRedirectURIs := strings.Split(allowedRedirectURIsEnv, ",")
	log.Print("Parsed allowed URIs count: ", len(allowedRedirectURIs))

	for i, allowed := range allowedRedirectURIs {
		trimmed := strings.TrimSpace(allowed)
		log.Printf("  [%d] Comparing '%s' with '%s'", i, uri, trimmed)
		if uri == trimmed {
			log.Print("✓ Redirect URI allowed: ", uri)
			return true
		}
	}

	log.Print("✗ Redirect URI not allowed: ", uri)
	return false
}