/**
 * DialogueGraph.ts
 *
 * Node-based dialogue system: dialogue nodes, branching,
 * conditional transitions, variable substitution, and speaker tracking.
 *
 * @module dialogue
 */
export type DialogueNodeType = 'text' | 'choice' | 'branch' | 'event' | 'end';
export interface DialogueNode {
    id: string;
    type: DialogueNodeType;
    speaker: string;
    text: string;
    choices: Array<{
        text: string;
        nextId: string;
        condition?: string;
    }>;
    nextId: string | null;
    condition: string | null;
    trueNextId: string | null;
    falseNextId: string | null;
    event: string | null;
    eventData: Record<string, unknown>;
    visited: boolean;
}
export interface DialogueState {
    variables: Map<string, unknown>;
    visitedNodes: Set<string>;
    currentNodeId: string | null;
    history: string[];
}
export declare class DialogueGraph {
    private nodes;
    private state;
    private startNodeId;
    private eventListeners;
    addTextNode(id: string, speaker: string, text: string, nextId: string | null): DialogueNode;
    addChoiceNode(id: string, speaker: string, text: string, choices: Array<{
        text: string;
        nextId: string;
        condition?: string;
    }>): DialogueNode;
    addBranchNode(id: string, condition: string, trueNextId: string, falseNextId: string): DialogueNode;
    addEventNode(id: string, event: string, data: Record<string, unknown>, nextId: string | null): DialogueNode;
    addEndNode(id: string): DialogueNode;
    private addNode;
    setStart(nodeId: string): void;
    start(): DialogueNode | null;
    advance(choiceIndex?: number): DialogueNode | null;
    private processCurrentNode;
    getCurrentNode(): DialogueNode | null;
    setVariable(key: string, value: unknown): void;
    getVariable<T = unknown>(key: string): T | undefined;
    private evaluateCondition;
    interpolateText(text: string): string;
    onEvent(listener: (event: string, data: Record<string, unknown>) => void): void;
    getNodeCount(): number;
    getVisitedCount(): number;
    getHistory(): string[];
    isComplete(): boolean;
    getAvailableChoices(): Array<{
        text: string;
        nextId: string;
    }>;
}
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