import { GraphQLClient } from '../graphql/client';
import { GitLabVersionDetector, GitLabInstanceInfo } from './GitLabVersionDetector';
import { SchemaIntrospector, SchemaInfo } from './SchemaIntrospector';
import { TokenScopeInfo } from './TokenScopeDetector';
export interface InstanceState {
    client: GraphQLClient;
    versionDetector: GitLabVersionDetector;
    schemaIntrospector: SchemaIntrospector;
    instanceInfo: GitLabInstanceInfo | null;
    schemaInfo: SchemaInfo | null;
    tokenScopeInfo: TokenScopeInfo | null;
    isInitialized: boolean;
    introspectedInstanceUrl: string | null;
}
export declare class ConnectionManager {
    private static instance;
    private instances;
    private currentInstanceUrl;
    private introspectionPromises;
    private static introspectionCache;
    private static readonly CACHE_TTL;
    private initializePromises;
    private latestRequestedUrl;
    private readonly instanceAccessTimes;
    private static MAX_INSTANCES;
    private static INSTANCE_TTL_MS;
    private touchInstance;
    private dropInstance;
    private evictExpired;
    private evictLRUIfOverCapacity;
    private constructor();
    static getInstance(): ConnectionManager;
    initialize(instanceUrl?: string): Promise<void>;
    private doInitialize;
    ensureIntrospected(explicitUrl?: string): Promise<void>;
    private doIntrospection;
    private resolveState;
    getClient(instanceUrl?: string): GraphQLClient;
    getInstanceClient(instanceUrl?: string, authHeaders?: Record<string, string>): GraphQLClient;
    getVersionDetector(instanceUrl?: string): GitLabVersionDetector;
    getSchemaIntrospector(instanceUrl?: string): SchemaIntrospector;
    getInstanceInfo(instanceUrl?: string): GitLabInstanceInfo;
    getSchemaInfo(instanceUrl?: string): SchemaInfo;
    getCurrentInstanceUrl(): string | null;
    isConnected(instanceUrl?: string): boolean;
    isFeatureAvailable(feature: keyof GitLabInstanceInfo['features'], instanceUrl?: string): boolean;
    getTier(instanceUrl?: string): string;
    getVersion(instanceUrl?: string): string;
    isWidgetAvailable(widgetType: string, instanceUrl?: string): boolean;
    getTokenScopeInfo(instanceUrl?: string): TokenScopeInfo | null;
    refreshTokenScopes(): Promise<boolean>;
    private detectVersionViaREST;
    private getDefaultFeatures;
    reinitialize(rawInstanceUrl: string): Promise<void>;
    clearInflight(rawUrl: string): void;
    reset(): void;
}