import { type ComputedRef } from "vue";
import { type EveAgentStoreCallbacks, type EveAgentStoreSnapshot, type EveAgentStoreStatus, type PrepareSend } from "#client/eve-agent-store.js";
import type { EveAgentReducer } from "#client/reducer.js";
import type { ClientSession } from "#client/session.js";
import { type EveMessageData } from "#client/message-reducer.js";
import type { HandleMessageStreamEvent } from "#protocol/message.js";
import type { ClientAuth, HeadersValue, SendTurnPayload, SessionState } from "#client/types.js";
export type { PrepareSend };
/**
 * Lifecycle phase of a `useEveAgent` session: `"ready"` (idle), `"submitted"`
 * (request sent, awaiting first event), `"streaming"` (events arriving), or
 * `"error"`.
 */
export type UseEveAgentStatus = EveAgentStoreStatus;
/**
 * Point-in-time projected state for an Eve agent session (`data`, `error`,
 * `events`, `session`, `status`).
 *
 * `useEveAgent` passes this shape to callbacks such as `onFinish`, but exposes
 * the same fields as individual reactive refs on its return value.
 */
export type UseEveAgentSnapshot<TData> = EveAgentStoreSnapshot<TData>;
/**
 * Reactive return value from `useEveAgent`.
 */
export interface UseEveAgentReturn<TData> {
    /** Projected state: the reducer folds every stream event into this value. */
    readonly data: ComputedRef<TData>;
    /** Last transport-level error, or `undefined` when healthy. */
    readonly error: ComputedRef<Error | undefined>;
    /** Raw server events from this session (authoritative stream). */
    readonly events: ComputedRef<readonly HandleMessageStreamEvent[]>;
    /** Clear all state and start a new session. */
    readonly reset: () => void;
    /** Send a turn with full structured input (message, attachments, input responses). */
    readonly send: <TOutput = unknown>(input: SendTurnPayload<TOutput>) => Promise<void>;
    /** Current session identity and stream cursor. */
    readonly session: ComputedRef<SessionState>;
    /** Lifecycle phase: `"ready"` (idle), `"submitted"` (request sent, awaiting first event), `"streaming"` (events arriving), or `"error"`. */
    readonly status: ComputedRef<UseEveAgentStatus>;
    /** Abort the in-flight request. */
    readonly stop: () => void;
}
/**
 * Configuration for creating or binding a Vue Eve agent session.
 *
 * Session configuration is read once when the composable creates its internal
 * store; to change the host, reducer, or session, remount the component. For
 * credentials or headers that must change without remounting, pass function
 * values to `auth` or `headers`; the client resolves those before each request.
 *
 * Lifecycle callbacks (`onError`, `onEvent`, `onFinish`, `onSessionChange`,
 * `prepareSend`) are inherited from {@link EveAgentStoreCallbacks} and synced on
 * every render.
 */
export interface UseEveAgentOptions<TData> extends EveAgentStoreCallbacks<TData> {
    /** Authentication configuration; a function value is resolved per request. */
    readonly auth?: ClientAuth;
    /** Custom headers; a function value is resolved per request. */
    readonly headers?: HeadersValue;
    /**
     * Base URL used for Eve client requests.
     *
     * By default, requests target same-origin Eve routes such as `/eve/v1/...`.
     * Pass a same-origin prefix such as `/api` to use an app-owned proxy, or an
     * absolute origin to talk to an Eve server directly.
     *
     * @default ""
     */
    readonly host?: string;
    /** Prior stream events to rehydrate the projected state from on mount. */
    readonly initialEvents?: readonly HandleMessageStreamEvent[];
    /** Prior session cursor to resume from on mount. */
    readonly initialSession?: SessionState;
    /** Maximum SSE reconnection attempts per turn. @default 3 */
    readonly maxReconnectAttempts?: number;
    /**
     * Project submitted user messages before Eve confirms them with a
     * `message.received` stream event.
     *
     * Optimistic events are reducer-facing projection events only. They are not
     * exposed through `events`, which remains the authoritative Eve stream.
     *
     * @default true
     */
    readonly optimistic?: boolean;
    /**
     * Projects stream events into `TData`.
     *
     * @default defaultMessageReducer()
     */
    readonly reducer?: EveAgentReducer<TData>;
    /**
     * Externally owned {@link ClientSession} to bind instead of creating one.
     *
     * When set, `reset()` reuses this session rather than constructing a new one.
     */
    readonly session?: ClientSession;
}
export declare function useEveAgent(options?: UseEveAgentOptions<EveMessageData>): UseEveAgentReturn<EveMessageData>;
export declare function useEveAgent<TData>(options: UseEveAgentOptions<TData> & {
    readonly reducer: EveAgentReducer<TData>;
}): UseEveAgentReturn<TData>;
