export type Plugin = {
    onState: StateHandler;
};
declare class Plugins {
    plugins: (Plugin | undefined)[];
    onState(state: TraceState, thread: Thread): void;
    add(plugin: Plugin): void;
    remove(plugin: Plugin): void;
}
export declare const plugins: Plugins;
export type FlowOptions = {
    name?: string;
} & Omit<FlowupOptions, 'filter' | 'names'>;
export type FlowupOptions = {
    token?: any;
    names?: {
        [key: string]: true | FlowOptions;
    };
    plugins?: Plugin[];
} & Config;
export type FlowResult<TReturn = any, TThis = any, TParam extends any[] = any[], TErrf extends boolean = false> = TErrf extends false ? [Canceled<TReturn, TThis, TParam>] | [null, TReturn] : [unknown] | [null, Canceled<TReturn, TThis, TParam>] | [null, null, TReturn];
export type SafeFlowCreator<TReturn = any, TThis = any, TParam extends any[] = any, TErrf extends boolean = false> = (...args: TParam) => Promise<FlowResult<TReturn, TThis, TParam, TErrf>> & (TErrf extends false ? {
    safe_flow_promise: true;
    canceled: () => boolean;
    cancel: (reason?: any) => void;
    state: () => PromiseState;
    errf: () => ReturnType<SafeFlowCreator<TReturn, TThis, TParam, true>>;
    onCancel: (handler: CancelHandler) => ReturnType<SafeFlowCreator<TReturn, TThis, TParam>>;
} : {
    safe_flow_promise: true;
    canceled: () => boolean;
    cancel: (reason?: any) => void;
    state: () => PromiseState;
    onCancel: (handler: CancelHandler) => ReturnType<SafeFlowCreator<TReturn, TThis, TParam, true>>;
});
type Canceler = (reason: any, isDropout?: boolean) => any;
export declare const FlowState: {
    readonly canceled: 1;
    readonly done: 2;
};
export declare const ErrfState: {
    readonly error: 1;
    readonly canceled: 2;
    readonly done: 3;
};
export declare enum PromiseState {
    pending = 0,
    fulfilled = 1,
    rejected = 2,
    canceled = 3
}
type CancelHandler = (reason: any) => any;
export declare class Thread {
    func: Function;
    creator: SafeFlowCreator;
    parent: Thread | undefined;
    token: any;
    trace: boolean | Trace;
    autoBreak: boolean;
    name?: string | undefined;
    id?: number | undefined;
    onState?: StateHandler | undefined;
    plugins?: Plugin[] | undefined;
    promiseState: PromiseState;
    canceled: boolean;
    state?: TraceState;
    canceler?: Canceler;
    cancellation?: Canceled;
    children: Thread[];
    willCancel: boolean;
    willBreak: boolean;
    get hasChildren(): boolean;
    _completed: boolean;
    get completed(): boolean;
    _disposed: boolean;
    get disposed(): boolean;
    _level: number;
    levelup(): void;
    constructor(func: Function, creator: SafeFlowCreator, parent: Thread | undefined, token: any, trace: boolean | Trace, autoBreak?: boolean, name?: string | undefined, id?: number | undefined, onState?: StateHandler | undefined, plugins?: Plugin[] | undefined);
    changeState(state: TraceState.thread_starting): void;
    changeState(state: TraceState.thread_idle): void;
    changeState(state: TraceState.thread_canceled, reason: unknown): void;
    changeState(state: TraceState.thread_error, error: unknown): void;
    changeState(state: TraceState.thread_done, value: unknown): void;
    changeState(state: TraceState.thread_completed): void;
    changeState(state: TraceState.thread_done_canceled, value: unknown): void;
    changeState(state: TraceState.thread_disposed): void;
    addChild(thread: Thread): void;
    removeChild(thread: Thread): void;
    complete(dispose?: boolean): void;
    dispose(): void;
}
export declare class Canceled<TReturn = any, TThis = any, TParam extends any[] = any> {
    creator: SafeFlowCreator<TReturn, TThis, TParam>;
    thisArg: TThis;
    args: TParam;
    reason: any;
    constructor(creator: SafeFlowCreator<TReturn, TThis, TParam>, thisArg: TThis, args: TParam, reason: any);
    retry(): Promise<[Canceled<TReturn, TThis, TParam>] | [null, TReturn]> & {
        safe_flow_promise: true;
        canceled: () => boolean;
        cancel: (reason?: any) => void;
        state: () => PromiseState;
        errf: () => Promise<[unknown] | [null, null, TReturn] | [null, Canceled<TReturn, TThis, TParam>]> & {
            safe_flow_promise: true;
            canceled: () => boolean;
            cancel: (reason?: any) => void;
            state: () => PromiseState;
            onCancel: (handler: CancelHandler) => Promise<[unknown] | [null, null, TReturn] | [null, Canceled<TReturn, TThis, TParam>]> & any;
        };
        onCancel: (handler: CancelHandler) => Promise<[Canceled<TReturn, TThis, TParam>] | [null, TReturn]> & any;
    };
}
export type Filter = (name: string) => boolean;
export type StateHandler = (state: TraceState, thread: Thread) => any;
type Config = {
    trace?: boolean | Trace;
    standalone?: boolean;
    autoBreak?: boolean;
    filter?: Filter;
    onState?: StateHandler;
    development?: 'auto' | 'development' | 'production';
};
export declare function configure(options?: Config): void;
export declare const __debug_logger: {
    log: (...args: any[]) => void;
};
export declare const __debug_token_creators: Map<any, SafeFlowCreator<any, any, any, false>[]>;
export declare const __debug_creator_processes: Map<SafeFlowCreator<any, any, any, false>, Thread[]>;
export declare const __debug_get_curr_thread: () => Thread | undefined;
export declare function __debug_clear_names(): void;
export declare function __debug_clear_threads(): void;
export declare function __debug_enable(value: boolean): void;
export declare const __debug_live_threads: Thread[];
export declare function __debug_in_thread(): boolean;
export declare enum TraceState {
    creator_created = 0,
    thread_starting = 1,
    thread_idle = 2,
    thread_canceled = 3,
    thread_error = 4,
    thread_done = 5,
    thread_done_canceled = 6,
    thread_completed = 7,
    thread_disposed = 8
}
export type TraceEvent = {
    name: string;
    state: TraceState.creator_created;
} | {
    name: string;
    id?: number;
    state: TraceState.thread_canceled;
    reason?: any;
} | {
    name: string;
    id?: number;
    state: TraceState.thread_error;
    error: unknown;
} | {
    name: string;
    id?: number;
    state: TraceState.thread_done;
    value: unknown;
} | {
    name: string;
    id?: number;
    state: TraceState.thread_done_canceled;
    value?: unknown;
} | {
    name: string;
    id?: number;
    state: TraceState.thread_starting | TraceState.thread_idle | TraceState.thread_completed | TraceState.thread_disposed;
};
export type Trace = (event: TraceEvent) => void;
export declare function flow<TReturn = any, TParam extends any[] = any>(func: (...args: TParam) => Promise<TReturn>, options?: FlowOptions): SafeFlowCreator<TReturn, ThisParameterType<typeof func>, TParam>;
export declare function isInvalid(): boolean;
export declare function isSafeFlowPromise(promise: any): boolean;
export declare function isCreator(func: Function): boolean;
export declare function cancel(creator: SafeFlowCreator, reason?: any): void;
export declare function cancel(token?: any, reason?: any): void;
export declare function cancelAll(reason?: any): void;
export declare function cancelSelf(reason?: any): void;
export declare function flowed<TReturn = any, TThis = any, TParam extends any[] = any>(func: (this: TThis, ...args: TParam) => Promise<TReturn>): SafeFlowCreator<TReturn, TThis, TParam>;
export declare function isFlowupObject(target: any): boolean;
export declare function flowup<T = any>(target: T, options?: FlowupOptions): T;
export declare function internalFlowup(target: any, options?: FlowupOptions): void;
export declare function flowable(options: FlowOptions): (target: any, propertyKey: string, descriptor?: PropertyDescriptor) => void;
export declare function flowable(target: any, propertyKey: string, descriptor?: PropertyDescriptor): void;
export {};