/**
 * Runner — consumer-facing interface for every primitive/composition/pattern.
 *
 * Pattern: Facade (GoF) over the footprintjs FlowChart + EventDispatcher.
 * Role:    The one object consumers hold. Exposes:
 *            - `.run()` (execute)
 *            - `.getSpec()` (the design-time FlowChart blueprint —
 *              same value footprintjs's `addSubFlowChart*` accepts)
 *            - `.on() / .off() / .once()` (listener subscription)
 *            - `.attach()` (attach custom CombinedRecorder)
 *            - `.emit()` (consumer-defined custom events on the same
 *              dispatcher, matches DOM CustomEvent)
 * Emits:   N/A — this file defines the INTERFACE. Concrete runners
 *          (LLMCall, Agent, Sequence, etc.) implement it.
 */
import type { CombinedRecorder, FlowChart, FlowChartExecutor, FlowchartCheckpoint, RunOptions } from 'footprintjs';
import type { RunnerPauseOutcome } from './pause.js';
import type { EventListener, ListenOptions, Unsubscribe, WildcardListener, WildcardSubscription } from '../events/dispatcher.js';
import type { AgentfootprintEvent, AgentfootprintEventType } from '../events/registry.js';
import type { FlowchartHandle, FlowchartOptions } from '../recorders/observability/FlowchartRecorder.js';
import type { LocalObservabilityHandle, LocalObservabilityOptions } from '../recorders/observability/localObservability.js';
import type { ObservabilityEnableOptions, CostEnableOptions, LiveStatusEnableOptions } from '../strategies/attach.js';
/**
 * High-level feature-enable methods. Each attaches a pre-built observability
 * recorder and returns an Unsubscribe function. Additional methods land in
 * Phase 5 (lens, tracing, cost, guardrails, ...).
 */
export interface EnableNamespace {
    /**
     * Live composition graph — subflow / fork-branch / decision-branch
     * nodes accumulate as execution unfolds. Hook into any graph renderer
     * (React Flow, Cytoscape, D3) without touching footprintjs internals.
     *
     * Returns a handle with `getSnapshot()` so the UI can query the graph
     * at any time (not just via onUpdate). Wires the boundary recorder's
     * three connections, commit tracking included, so the recording it
     * leaves behind can be replayed with its step strip intact.
     */
    flowchart(opts?: FlowchartOptions): FlowchartHandle;
    /**
     * Tier-3 / Debug — RETAIN a live run model: watch it via `onLive` (a
     * fresh `StepGraph` per event, for your own renderer) AND freeze it for
     * OFFLINE replay via `handle.getTrace()` / `onRecorded`.
     *
     * This handle is NOT a Lens recorder — `<Lens recorder={…} />` wants a
     * `LensRecorder`, a different object with a different surface. To put a
     * run in front of Lens, record it with `recordRun()` and hand the
     * recording to lens's `observeRecording()`.
     *
     * Contrast `observability({ strategy })` below (Tier-4 / Monitor), which
     * ships each event to a vendor and forgets. `localObservability` keeps the
     * model so you can look at it — locally, with full content. The serialized
     * `Trace` is redactable at the serialize boundary (`redact` / `getTrace`).
     */
    localObservability(opts?: LocalObservabilityOptions): LocalObservabilityHandle;
    /**
     * v2.8+ — grouped strategy enabler for observability. Pipes every
     * typed event into a vendor strategy (Datadog, OTel, AgentCore,
     * CloudWatch, …) or the default `consoleObservability()`. See
     * `agentfootprint/strategies` + `docs/inspiration/strategy-everywhere.md`.
     */
    observability(opts?: ObservabilityEnableOptions): Unsubscribe;
    /**
     * v2.8+ — grouped strategy enabler for cost. Subscribes the strategy
     * to `cost.tick` events; defaults to `inMemorySinkCost()` for
     * read-back / test inspection.
     */
    cost(opts?: CostEnableOptions): Unsubscribe;
    /**
     * v2.8+ — grouped strategy enabler for chat-bubble live status.
     * Maintains the thinking-state machine; calls strategy.renderStatus
     * each time the rendered line changes (deduped — not on every token).
     * Strategy is required (consumer must wire UI).
     */
    liveStatus(opts: LiveStatusEnableOptions): Unsubscribe;
}
/**
 * Every primitive (LLMCall, Agent), every composition (Sequence, Parallel,
 * Conditional, Loop), and every pattern factory result implements Runner.
 * That makes them freely nestable: any runner can be a child of any
 * composition.
 */
export interface Runner<TIn = unknown, TOut = unknown> {
    /**
     * Return the footprintjs FlowChart for this runner — the canonical
     * design-time blueprint. Stable across calls. Pairs with the run-time
     * accessors (`getLastSnapshot`, `getCommitCount`) and matches
     * `ExplainableShell.spec` + `specToReactFlow(spec, ...)` consumer
     * conventions.
     *
     * Its `buildTimeStructure` field is the CHART — the one ingredient a
     * finished run does not leave behind, and the only route to a drawable
     * graph. Save it alongside the snapshot when storing a run (or let
     * `recordRun()` do it).
     *
     * Subflow mounting (footprintjs `addSubFlowChart*`) accepts the
     * `FlowChart` value directly:
     *
     *   parent.addSubFlowChartNext('sf-agent', child.getSpec(), 'Agent')
     */
    getSpec(): FlowChart;
    /**
     * The footprintjs snapshot of the most recent run — shared state, the
     * commit log, the execution tree, and every attached recorder's data.
     * `undefined` before the first run.
     *
     * The canonical structure: consumers read this for shape and join
     * their own per-stage payload by `runtimeStageId`, rather than
     * re-deriving structure from typed events.
     */
    getLastSnapshot(): ReturnType<FlowChartExecutor['getSnapshot']> | undefined;
    /**
     * How many commits the run has written so far — the run's TIME AXIS.
     *
     * One commit lands per executed stage, in order, so the count sampled
     * at a moment is that moment's position in the run. Observers stamp it
     * to record WHEN they fired — it is what `boundaryRecorder({
     * getCommitCount })` puts on every boundary, and the only reason a
     * step strip can be rebuilt from a stored recording later.
     *
     * `0` before the first run; cumulative across `resume()` on the same
     * executor. Sample it live (a closure), never a captured number.
     */
    getCommitCount(): number;
    /**
     * Return the consumer-shaped UI group for this runner — produced by
     * invoking the `groupTranslator` (if one was attached at constructor
     * time) with this composition's metadata. Returns `undefined` when no
     * translator was attached.
     *
     * Companion of `getSpec()`: `getSpec()` is the canonical (UI-
     * agnostic) blueprint; `getUIGroup()` is the consumer-shaped view.
     * Both are stable post-construction.
     *
     * See `core/translator.ts` for the `GroupTranslator` /
     * `GroupMetadata` types.
     */
    getUIGroup<T = unknown>(): T | undefined;
    /**
     * Translate this runner's group metadata with a CALLER-SUPPLIED
     * translator that OVERRIDES whatever translator (if any) the runner
     * was constructed with. Used by parent compositions to apply
     * per-method translator overrides (e.g.,
     * `Parallel.create(...).branch('special', runner, { groupTranslator: ... })`
     * — for the `'special'` branch only, this `override` runs against
     * `runner`'s own `GroupMetadata` instead of the runner's default
     * translator).
     *
     * NOT cached at the runner level. The caller invokes this exactly
     * once per build (parent's `buildUIGroupMetadata`) and caches the
     * resulting `uiGroup` via the parent's `RunnerBase.uiGroupCache`.
     *
     * Returns `undefined` when this runner has no group metadata to
     * translate (i.e., `buildUIGroupMetadata()` returned `undefined`).
     */
    getUIGroupWith<T = unknown>(override: import('./translator.js').GroupTranslator): T | undefined;
    /**
     * Execute the runner. On happy-path completion, resolves with `TOut`.
     * If any stage (Agent tool via `pauseHere`, nested runner, or consumer
     * scope code) called `scope.$pause()`, resolves with a `RunnerPauseOutcome`
     * carrying the serializable checkpoint. Discriminate with `isPaused()`.
     */
    run(input: TIn, options?: RunOptions): Promise<TOut | RunnerPauseOutcome>;
    /**
     * Resume a previously-paused execution from its checkpoint. `input` is
     * delivered to the paused stage's resume handler. The same return shape
     * as `run()`: `TOut` on completion, `RunnerPauseOutcome` if execution
     * pauses again (e.g., a multi-step approval flow).
     */
    resume(checkpoint: FlowchartCheckpoint, input?: unknown, options?: RunOptions): Promise<TOut | RunnerPauseOutcome>;
    /**
     * Subscribe a typed listener. Returns unsubscribe.
     *
     * Lifecycle: the subscription lives until you call the returned
     * Unsubscribe, the `{ signal }` you passed aborts, or
     * `removeAllListeners()` runs. Nothing auto-expires per-run — pass a
     * per-run AbortSignal for request-scoped listeners on long-lived
     * runners (servers).
     */
    on<K extends AgentfootprintEventType>(type: K, listener: EventListener<K>, options?: ListenOptions): Unsubscribe;
    /** Subscribe to a domain wildcard (e.g. 'agentfootprint.context.*') or '*'. */
    on(type: WildcardSubscription, listener: WildcardListener, options?: ListenOptions): Unsubscribe;
    /** Unsubscribe a previously-registered listener. */
    off<K extends AgentfootprintEventType>(type: K, listener: EventListener<K>): void;
    off(type: WildcardSubscription, listener: WildcardListener): void;
    /** Subscribe a one-shot listener (fires once then auto-removes). Accepts `{ signal }`. */
    once<K extends AgentfootprintEventType>(type: K, listener: EventListener<K>, options?: Omit<ListenOptions, 'once'>): Unsubscribe;
    once(type: WildcardSubscription, listener: WildcardListener, options?: Omit<ListenOptions, 'once'>): Unsubscribe;
    /**
     * Drop every event listener on this runner in one call (typed,
     * domain-wildcard, and `'*'`). Lifecycle escape hatch for server
     * consumers that can't keep Unsubscribe handles. Also removes
     * listeners wired by `enable.*` strategies; does NOT detach recorders
     * added via `attach()`.
     */
    removeAllListeners(): void;
    /**
     * Diagnostic — listeners currently retained. No argument = total
     * (the leak-detection number); with a subscription key = that exact
     * bucket only (wildcards not folded in — use the dispatcher's
     * `hasListenersFor` semantics for "would anything fire").
     */
    listenerCount(type?: AgentfootprintEventType | WildcardSubscription): number;
    /**
     * Attach a footprintjs CombinedRecorder to observe the execution.
     * Returns an unsubscribe function — call it to detach the recorder
     * from future runs. (Already-running executions continue using it.)
     *
     * Recorders live for the RUNNER's lifetime: nothing auto-expires
     * per-run, and `removeAllListeners()` does not touch them. The caller
     * owns cleanup via the returned Unsubscribe.
     */
    attach(recorder: CombinedRecorder): Unsubscribe;
    /**
     * Enable-namespace for high-level observability features. Each method
     * attaches a pre-built CombinedRecorder and returns an unsubscribe
     * function. Consumers write ONE line to enable rich observability,
     * instead of N `.on()` subscriptions.
     */
    readonly enable: EnableNamespace;
    /**
     * Emit a consumer-defined custom event through the same dispatcher.
     *
     * Matches DOM CustomEvent. Useful for domain-specific events outside
     * the 47-event registry (e.g. `myapp.billing.checkpoint`). Library
     * events are reserved under the `agentfootprint.*` namespace.
     */
    emit(name: string, payload: Record<string, unknown>): void;
}
/** Kept for convenience — mirrors the RunOptions export from footprintjs. */
export type { RunOptions };
/**
 * Union used in emit() for the `AgentfootprintEvent` type constraint. A
 * consumer emitting a custom event passes a plain object payload; the
 * dispatcher wraps it as AgentfootprintEvent only when the name is a
 * registered type. Otherwise it flows through as an opaque custom event.
 */
export type EmittedEvent = AgentfootprintEvent;