/**
 * Authentication hook and utilities.
 * 
 * NOTE: Auth is currently disabled (using ConvexProvider instead of ConvexAuthProvider).
 * This hook provides a stub implementation until Zitadel is configured.
 */

import { useState, useCallback } from "react";

/**
 * Hook for authentication state and actions.
 * Currently returns unauthenticated state - enable ConvexAuthProvider when Zitadel is ready.
 */
export function useAuth() {
  const [error, setError] = useState<string | null>(null);

  const handleSignIn = useCallback(async () => {
    setError("Authentication not configured. Set up Zitadel environment variables.");
  }, []);

  const handleSignOut = useCallback(async () => {
    // No-op when not authenticated
  }, []);

  return {
    isAuthenticated: false,
    isLoading: false,
    error,
    signIn: handleSignIn,
    signOut: handleSignOut,
    clearError: () => setError(null),
  };
}

// Full implementation for when ConvexAuthProvider is enabled:
/*
import { useConvexAuth } from "convex/react";
import { useAuthActions } from "@convex-dev/auth/react";
import { makeRedirectUri } from "expo-auth-session";
import { openAuthSessionAsync } from "expo-web-browser";
import { Platform } from "react-native";

const redirectUri = makeRedirectUri({
  scheme: "scry",
  path: "auth",
});

export function useAuth() {
  const { isAuthenticated, isLoading } = useConvexAuth();
  const { signIn, signOut } = useAuthActions();
  const [isSigningIn, setIsSigningIn] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const handleSignIn = useCallback(async () => {
    setIsSigningIn(true);
    setError(null);

    try {
      const result = await signIn("zitadel", { redirectTo: redirectUri });

      if (Platform.OS === "web") {
        return;
      }

      if (result?.redirect) {
        const authResult = await openAuthSessionAsync(
          result.redirect.toString(),
          redirectUri,
          {
            showInRecents: true,
            preferEphemeralSession: false,
          }
        );

        if (authResult.type === "success") {
          const url = new URL(authResult.url);
          const code = url.searchParams.get("code");

          if (code) {
            await signIn("zitadel", { code });
          }
        } else if (authResult.type === "cancel") {
          setError("Sign-in was cancelled");
        }
      }
    } catch (err) {
      console.error("Sign-in error:", err);
      setError(err instanceof Error ? err.message : "Sign-in failed");
    } finally {
      setIsSigningIn(false);
    }
  }, [signIn]);

  const handleSignOut = useCallback(async () => {
    try {
      await signOut();
    } catch (err) {
      console.error("Sign-out error:", err);
      setError(err instanceof Error ? err.message : "Sign-out failed");
    }
  }, [signOut]);

  return {
    isAuthenticated,
    isLoading: isLoading || isSigningIn,
    error,
    signIn: handleSignIn,
    signOut: handleSignOut,
    clearError: () => setError(null),
  };
}
*/