export type ProviderMergeMode = 'replaceAll' | 'append' | 'prepend' | 'insertAt' | 'replaceByName';
export type ProviderSource = 'decision' | 'decisionPlusExternal';
export type BalancerProvider = {
    /** Stable id (merge identity key), e.g. a Globo POP code like `ber-sp`. */
    name: string;
    /** CDN/vendor label, e.g. `globo`. */
    provider: string;
    /** Manifest or route URL. Optional when `host` is set. */
    url?: string;
    /** CDN hostname used for segment rewriting. Required when `url` is omitted. Wins over the `url` hostname when both are set. */
    host?: string;
    /**
     * Optional prefix prepended before `segment.pathName` (e.g. a signed JWT prefix `/j/{token}/`).
     * Defaults to '' — never inferred from the manifest `url` pathname.
     */
    path?: string;
    port?: string;
    score?: number;
    weight?: number;
    price?: number;
    absolute?: boolean;
    dnsEnabled?: boolean;
    auth?: cdnAuthInfo;
    original?: boolean;
};
export type ExternalProvidersOptions = {
    mergeMode?: ProviderMergeMode;
    insertIndex?: number;
    respectClientOrder?: boolean;
    activeSwitching?: string;
    cdnBalanceMethod?: string;
};
/**
 * Resolve the host / port / path / url tuple used for segment rewriting.
 * Matches /decision semantics: `host` drives CDN switching; `path` is an optional
 * prefix (e.g. Globo JWT) — never the manifest pathname, which already arrives via
 * `segment.pathName`. Returns null (instead of throwing) for unusable entries so a
 * single malformed provider cannot break the whole overlay call.
 */
export declare function deriveHostAndPath(url?: string, host?: string, port?: string, path?: string): {
    host: string;
    port?: string;
    path: string;
    url: string;
} | null;
export declare function balancerProviderToCdnApiData(provider: BalancerProvider, index: number, respectClientOrder: boolean): cdnApiData | null;
export declare function getBaselineProvidersFromDecision(resp: balancerResponse): cdnApiData[];
export declare function mergeProviderLists(baseline: cdnApiData[], external: BalancerProvider[], options: ExternalProvidersOptions): cdnApiData[];
export declare function buildDecisionResponseWithMergedProviders(decision: balancerResponse, mergedProviders: cdnApiData[], options: ExternalProvidersOptions): balancerResponse;
/**
 * Holds the runtime external-provider overlay and the last raw /decision response.
 * The overlay is re-applied on every decision refresh so injected hosts survive
 * updateTime / manifest-driven reloads. `clearExternalProviders` restores the raw
 * decision baseline; profile settings are untouched either way.
 */
export default class ExternalProvidersManager {
    private externalProviders;
    private externalOptions;
    private lastDecisionResponse;
    private lastOriginalHost;
    private hasExternalOverlay;
    hasOverlay(): boolean;
    getProviderSource(): ProviderSource;
    getExternalProviders(): BalancerProvider[];
    getExternalOptions(): ExternalProvidersOptions;
    getLastOriginalHost(): string;
    /**
     * Called on every successful /decision. Remembers the raw response and returns
     * either the raw response (no overlay) or the overlay-merged response.
     */
    applyDecisionOverlay(decision: balancerResponse, originalHost: string): balancerResponse;
    setExternalProviders(providers: BalancerProvider[], options?: ExternalProvidersOptions): balancerResponse | null;
    clearExternalProviders(): balancerResponse | null;
    private buildMergedDecision;
}