export interface ILogger {
    log(msg: string, data?: any): void;
    warn(msg: string, data?: any): void;
    error(msg: string, data?: any): void;
}
export interface IVariable<T> {
    onValue(callback: (val: T) => void): void;
    onError(callback: (err: Error) => void): void;
    current(): T | null;
    previous(): T | null;
}
export interface IRemoteOptions {
    [name: string]: any;
}
export interface ISchemaMap {
    [key: string]: object;
}
export interface IConfigOptions {
    configPath?: string;
    configEnv?: string;
    remoteOptions?: IRemoteOptions;
    resolvers?: IResolverMap;
    loaders?: Array<IFileLoader>;
    translators?: Array<IConfigTranslator>;
    schemas?: ISchemaMap;
}
export interface IConsulOptions {
    consulAddress?: string;
    consulDc?: string;
    consulKeys?: string;
    consulNamespace?: string;
}
export interface IRemoteOverrides {
    key: string;
    [name: string]: string;
}
export interface IConfigStore {
    get<T = any>(key: string): T | null;
    getAll(...args: Array<string>): Array<any>;
    getWithDefault<T = any>(key: string, defaultVal: T): T;
}
export interface IDynamicConfig {
    get<T = any>(key?: string): Promise<T>;
    watch<T = any>(key?: string): IVariable<T>;
    getAll(...args: Array<string>): Promise<Array<any>>;
    getWithDefault<T = any>(key: string, defaultVal: T): Promise<T>;
    getRemoteValue<T>(key: string): Promise<T>;
    getSecretValue<T>(key: string): Promise<T>;
}
export interface IConfigTranslator {
    translate(configValue: any): any;
}
export declare type ITranslator = (obj: any) => any;
export interface IFileLoader {
    type: string | Array<string>;
    load(filePath: string): Promise<object>;
}
export interface ILoadedFile {
    name: string;
    config: object;
}
export interface IResolvers {
    env: IRemoteResolver;
    process: IRemoteResolver;
    remote?: IRemoteResolver;
    secret?: IRemoteResolver;
}
export interface IResolverMap {
    remote?: IRemoteResolver;
    secret?: IRemoteResolver;
}
export interface INamedResolvers {
    [name: string]: IRemoteResolver;
}
export declare type SetFunction<T = any> = (key: string, value: T) => void;
export declare type RemoteInitializer = (config: IConfigStore, remoteOptions?: IRemoteOptions) => Promise<any>;
export declare type ResolverType = 'remote' | 'secret';
export interface IRemoteResolver {
    type: ResolverType;
    name: string;
    init: RemoteInitializer;
    get<T>(key: string, type?: ObjectType, altKey?: string): Promise<T>;
    watch<T>(key: string, cb: WatchFunction<T>, type?: ObjectType, altKey?: string): void;
}
export declare type SourceType = 'local' | 'remote' | 'secret' | 'env' | 'process';
export interface ISource {
    type: SourceType;
    name: string;
    key?: string;
    altKey?: string;
}
export declare type ConfigType = 'root' | ObjectType | DeferredType | InvalidType;
export declare type ObjectType = 'object' | 'array' | 'string' | 'number' | 'boolean' | 'null';
export declare type DeferredType = 'promise' | 'placeholder';
export declare type InvalidType = 'invalid';
export declare type WatchFunction<T = any> = (err: Error | undefined, val: T | undefined) => void;
export interface IConfigValue {
    type: ConfigType;
    watcher: WatchFunction<any> | null;
}
export interface IConfigError {
    key: string;
    message: string;
}
export interface IBaseConfigValue extends IConfigValue {
    source: ISource;
    nullable: boolean;
}
export declare type ConfigValue = IRootConfigValue | BaseConfigValue;
export declare type BaseConfigValue = IObjectConfigValue | IArrayConfigValue | IPrimitiveConfigValue | INullConfigValue | IPromisedConfigValue | IPlaceholderConfigValue | IInvalidConfigValue;
export interface IConfigProperties {
    [name: string]: BaseConfigValue;
}
export declare type ConfigItems = Array<BaseConfigValue>;
export interface IRootConfigValue extends IConfigValue {
    type: 'root';
    properties: IConfigProperties;
}
export interface IObjectConfigValue extends IBaseConfigValue {
    type: 'object';
    properties: IConfigProperties;
}
export interface IArrayConfigValue extends IBaseConfigValue {
    type: 'array';
    items: ConfigItems;
}
export interface IPrimitiveConfigValue extends IBaseConfigValue {
    type: 'string' | 'number' | 'boolean';
    value: string | number | boolean;
}
export interface INullConfigValue extends IBaseConfigValue {
    type: 'null';
    value: null;
}
export interface IInvalidConfigValue extends IBaseConfigValue {
    type: 'invalid';
    value: null;
}
export interface IPromisedConfigValue extends IBaseConfigValue {
    type: 'promise';
    value: Promise<any>;
}
export interface IPlaceholderConfigValue extends IBaseConfigValue {
    type: 'placeholder';
    value: IConfigPlaceholder;
}
export interface IResolver {
    name: string;
    type: ResolverType;
}
/**
 * Config placeholder as it appears in the raw config
 */
export interface IConfigPlaceholder {
    _source: string;
    _key: string;
    _type?: ObjectType;
    _default?: any;
    _nullable?: boolean;
    _altKey?: string;
}
/**
 * Config placeholder as is resolved after all resolvers have been registered.
 *
 * name - name of remote resolver
 * key - key to fetch from resolver
 * type - type of resolver
 * default - default value if fetching fails
 */
export interface IResolvedPlaceholder {
    path: string;
    resolver: IResolver;
    key: string;
    type: ObjectType;
    nullable: boolean;
    default?: any;
    altKey?: string;
}
export declare type KeyPath = Array<string>;
export declare type ObjectUpdate = [KeyPath, Promise<any>];
export declare type PromisedUpdate = [KeyPath, Promise<BaseConfigValue>];
export declare type ISchema = IArraySchema | IObjectSchema | IStringSchema | INumberSchema | IBooleanSchema | IAnySchema | INullSchema | IInvalidSchema | IUndefinedSchema;
export interface IArraySchema {
    type: 'array';
    items?: ISchema;
}
export interface IObjectSchema {
    type: 'object';
    properties?: ISchemaMap;
    required?: Array<string>;
}
export interface IStringSchema {
    type: 'string';
}
export interface INumberSchema {
    type: 'number';
}
export interface IBooleanSchema {
    type: 'boolean';
}
export interface IAnySchema {
}
export interface INullSchema {
    type: 'null';
}
export interface IUndefinedSchema {
    type: 'undefined';
}
export interface IInvalidSchema {
    type: 'invalid';
}