/**
 * Conditional — routing composition: evaluates branches in order, runs the first match.
 *
 * Pattern: Builder (GoF) + Adapter over footprintjs's `addDeciderFunction`.
 * Role:    core-flow/ layer. Picks exactly ONE branch based on a predicate
 *          (sync function of input) OR an LLM decision. Chosen branch
 *          receives `{ message }` and returns a string.
 * Emits:   agentfootprint.composition.enter / exit +
 *          composition.route_decided (via compositionRecorder).
 *
 * v1 of this primitive supports `.when(id, predicate, runner)` + `.otherwise(id, runner)`.
 * LLM-gated routing (`.whenLLM(id, prompt, runner)`) lands in Phase 5.
 */
import { type FlowchartCheckpoint, type RunOptions, type StructureRecorder } from 'footprintjs';
import type { GroupMetadata, GroupTranslator } from '../core/translator.js';
import type { RunnerPauseOutcome } from '../core/pause.js';
import type { Runner } from '../core/runner.js';
import { RunnerBase } from '../core/RunnerBase.js';
export interface ConditionalOptions {
    readonly name?: string;
    readonly id?: string;
    /**
     * Optional build-time recorders passed through to footprintjs's
     * `flowChart()` factory. Each recorder observes per-node build
     * events (`onStageAdded` / `onSubflowMounted` / etc.) for this
     * composition's internal chart (Seed + Route decider + each branch
     * mount + Finalize). When omitted, no build-time observation is
     * wired up.
     */
    readonly structureRecorders?: readonly StructureRecorder[];
    /**
     * Optional per-COMPOSITION translator (UI-agnostic). See
     * `core/translator.ts`. When attached, `runner.getUIGroup()` invokes
     * it with the Conditional's `GroupMetadata` (kind `'Conditional'`,
     * id, name, branches as members, plus `extra.fallbackId`).
     * Returns `undefined` when omitted.
     */
    readonly groupTranslator?: GroupTranslator;
}
export interface ConditionalInput {
    readonly message: string;
}
export type ConditionalOutput = string;
type BranchChild = Runner<{
    message: string;
}, string>;
export type Predicate = (input: ConditionalInput) => boolean;
interface BranchEntry {
    readonly id: string;
    readonly name: string;
    readonly runner: BranchChild;
    /** Undefined for the `otherwise` fallback. */
    readonly predicate?: Predicate;
    /** Optional per-method translator override for THIS branch only. */
    readonly groupTranslator?: GroupTranslator;
}
/**
 * Options bag accepted by `ConditionalBuilder.when()` and `.otherwise()`
 * for per-method overrides. Backwards-compatible — when the trailing
 * arg is a string, it's still treated as `name`.
 */
export interface ConditionalBranchOptions {
    /** Human-friendly name for this branch. Default: the branch id. */
    readonly name?: string;
    /** Per-method translator override. See `BranchEntry.groupTranslator`. */
    readonly groupTranslator?: GroupTranslator;
}
export declare class Conditional extends RunnerBase<ConditionalInput, ConditionalOutput> {
    readonly name: string;
    readonly id: string;
    private readonly branches;
    private readonly fallbackId;
    private readonly opts;
    private currentRunContext;
    constructor(opts: ConditionalOptions, branches: readonly BranchEntry[], fallbackId: string);
    static create(opts?: ConditionalOptions): ConditionalBuilder;
    protected getGroupTranslator(): GroupTranslator | undefined;
    /** Conditional: one member per branch (.when / .otherwise), plus
     *  `extra.fallbackId` marking the otherwise branch. Per-method
     *  overrides (L1c) take precedence over the branch runner's own
     *  translator. */
    protected buildUIGroupMetadata(): GroupMetadata;
    run(input: ConditionalInput, options?: RunOptions): Promise<ConditionalOutput | RunnerPauseOutcome>;
    resume(checkpoint: FlowchartCheckpoint, input?: unknown, options?: RunOptions): Promise<ConditionalOutput | RunnerPauseOutcome>;
    private createExecutor;
    private finalizeResult;
    private buildChart;
}
/**
 * Fluent builder. Branches evaluate in registration order; first matching
 * predicate wins. `.otherwise()` is the mandatory fallback.
 */
export declare class ConditionalBuilder {
    private readonly opts;
    private readonly branches;
    private fallbackRegistered;
    private fallbackId;
    private readonly seenIds;
    constructor(opts: ConditionalOptions);
    /**
     * Register a predicate-gated branch. `predicate` is a pure sync function
     * of the Conditional's input; if it returns true, the corresponding
     * runner executes. Branches evaluate in registration order.
     *
     * Fourth arg accepts EITHER a legacy bare `name` string OR a
     * `ConditionalBranchOptions` bag containing `name` and/or a per-method
     * `groupTranslator` override. The override applies ONLY to this
     * branch's `member.uiGroup`.
     */
    when(id: string, predicate: Predicate, runner: BranchChild, nameOrOpts?: string | ConditionalBranchOptions): this;
    /**
     * Register the fallback branch. Exactly ONE must be registered before build().
     * Third arg accepts a legacy `name` string OR a `ConditionalBranchOptions`
     * bag (same shape as `.when()`).
     */
    otherwise(id: string, runner: BranchChild, nameOrOpts?: string | ConditionalBranchOptions): this;
    build(): Conditional;
}
export {};