export type MoodleSeverity = "good" | "neutral" | "warning" | "critical";
export type MoodleSource = "meter" | "ailment" | "buff";
/** One survival moodle (status icon) — severity, source, and label for HUD chips. */
export interface Moodle {
    id: string;
    label: string;
    severity: MoodleSeverity;
    source: MoodleSource;
    stacks: number;
    icon?: string;
    /** 0..1 progress ring — remaining buff time, wound treatment, meter fill. Absent = no ring. */
    fraction?: number;
    /** Free-form note surfaced under the label (e.g. "-3°C", "needs bandage"). */
    note?: string;
}
export declare const MOODLE_SEVERITY_ORDER: Record<MoodleSeverity, number>;
/**
 * Merge any number of moodle groups into one stack — meters, ailments, and buffs
 * share this display. Same-id moodles fold together (stacks add, worst severity wins);
 * the result is ordered worst-first so the HUD reads critical statuses at a glance.
 */
export declare function stackMoodles(...groups: readonly (readonly Moodle[])[]): Moodle[];
export interface TimedMoodleInput {
    id: string;
    label: string;
    severity?: MoodleSeverity;
    icon?: string;
    note?: string;
    stacks?: number;
    /** Game-seconds until the moodle drops. Omit for a moodle that stays until removed. */
    duration?: number;
}
/** Ordered stack of active moodles derived from meters/ailments/buffs. */
export interface MoodleStack {
    /** Add or refresh a timed moodle (Valheim food buff, a temporary shelter status). */
    add(input: TimedMoodleInput): void;
    remove(id: string): void;
    has(id: string): boolean;
    /** Advance timers by a game-time delta; drops expired moodles. */
    tick(dt: number): void;
    /** The live timed moodles (buffs, temporary statuses). */
    list(): Moodle[];
    clear(): void;
}
/**
 * A stateful holder for timed status moodles (food buffs, temporary shelter, warmth).
 * Meters and multi-region health derive their own moodles on read; combine all three
 * through `stackMoodles(stack.list(), meterMoodles, ailmentMoodles)` for one display.
 */
export declare function createMoodleStack(): MoodleStack;