export declare const DEFAULT_CHAT_LOADING_MESSAGES: readonly ["Analisando sua pergunta", "Processando informações", "Consultando base de conhecimento", "Organizando ideias", "Elaborando resposta", "Refinando detalhes", "Verificando contexto", "Conectando conceitos", "Preparando resultado", "Quase lá", "Finalizando análise", "Estruturando resposta"];
/**
 * Stand-in steps for a turn that has not produced its own reasoning yet. They
 * accumulate, so the bubble reads as an agent working through the wait rather
 * than as a loading placeholder. The user message is already delivered at this
 * point, so the wait belongs to the answer.
 */
export declare const CHAT_PREPARING_STEPS: readonly ["Preparando a resposta", "Analisando a mensagem"];
/**
 * The first delay is measured from the send, every later one from the step
 * before it — so the sequence paces itself instead of racing a shared clock.
 * Late enough that a turn answering promptly never shows a stand-in, and
 * jittered so it does not look like a fixed-timer artifact.
 */
export declare const CHAT_PREPARING_STEP_DELAYS_MS: readonly [2500, 4000];
export declare const CHAT_PREPARING_STEP_JITTER_MS = 500;
export declare function nextChatPreparingStepDelay(stepIndex: number, random?: () => number): number;
export type ChatLoadingMessageMode = 'ordered' | 'random';
export type ChatLoadingMessagesInput = {
    loadingMessages?: readonly string[] | null;
    loadingMessagesMode?: ChatLoadingMessageMode | null;
};
export type ResolvedChatLoadingMessages = {
    mode: ChatLoadingMessageMode;
    messages: readonly string[];
};
export declare function resolveChatLoadingMessages(input?: ChatLoadingMessagesInput | null): ResolvedChatLoadingMessages;
export declare function getNextChatLoadingMessageIndex(mode: ChatLoadingMessageMode, messageCount: number, currentIndex: number, random?: () => number): number;