/**
 * IUFOInteractionHandler - Handles user click interactions with the UFO
 *
 * Manages click detection, determines reaction type based on proximity
 * and mood, and triggers appropriate responses (curious, playful, flee).
 */
import type { UFO } from "../domain/ufo-types.js";
import type { IUFOMoodManager } from "./IUFOMoodManager.js";
/** Callbacks for state transitions that need to happen in UFOSystem */
export interface UFOStateCallbacks {
    startExiting: (exitType: string) => void;
    resumeWandering: () => void;
}
/** Result of handling a click interaction */
export interface ClickResult {
    handled: boolean;
    reaction?: "curious" | "playful" | "flee" | "glance" | "investigate" | "ignore";
}
export interface IUFOInteractionHandler {
    /**
     * Handle a direct click on the UFO
     * Returns true if the click was handled
     */
    handleDirectHit(ufo: UFO, isConsecutive: boolean, moodManager: IUFOMoodManager, callbacks: UFOStateCallbacks): ClickResult;
    /**
     * Handle a click near but not on the UFO
     * UFO glances toward the click location
     */
    handleNearMiss(ufo: UFO, clickX: number, clickY: number, moodManager: IUFOMoodManager): ClickResult;
    /**
     * Handle a click far from the UFO
     * Curious UFO may investigate the location
     */
    handleFarClick(ufo: UFO, clickX: number, clickY: number, moodManager: IUFOMoodManager): ClickResult;
    /**
     * Calculate the angular difference between two angles
     * Returns value in range [-PI, PI]
     */
    angleDiff(from: number, to: number): number;
}
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