/**
 * Formats the OAuth callback response with JWT token.
 * Supports multiple response formats:
 * - JSON response with user and token
 * - URL fragment redirect with token
 * - Query parameter redirect with token
 *
 * @param token - JWT token to return
 * @param user - User object to return
 * @param redirectUrl - Optional redirect URL
 * @param responseType - Response format ('json' or undefined for redirect)
 * @returns Response object for Flink handler
 */
export function formatTokenResponse(token: string, user: any, redirectUrl?: string, responseType?: string): any {
    // JSON response format
    if (responseType === "json") {
        return {
            status: 200,
            data: {
                user,
                token,
            },
        };
    }

    // Redirect format
    if (redirectUrl) {
        // Use URL fragment for better security (token not sent to server)
        const separator = redirectUrl.includes("#") ? "&" : "#";
        const fullRedirectUrl = `${redirectUrl}${separator}token=${encodeURIComponent(token)}`;

        return {
            status: 302,
            headers: {
                Location: fullRedirectUrl,
            },
            data: {},
        };
    }

    // Default: return JSON if no redirect URL provided
    return {
        status: 200,
        data: {
            user,
            token,
        },
    };
}