import { FExecutionContext, FExecutionContextBase, FExecutionElement } from '@freemework/common';
import { Activity, NamedBreakpointActivity } from './activities/index.js';
export interface WorkflowVirtualMachine extends WorkflowVirtualMachine.Context {
    /**
     * Gets current executing activity, or raise FExceptionInvalidOperation if isTerminated === true
     */
    readonly currentActivity: Activity;
    /**
     * Get entry point activity
     */
    readonly entryPointActivity: Activity;
    /**
     * true - when idle
     * false - when tick is executing right now
     */
    readonly isPaused: boolean;
    /**
     * true - when no activities left to execute
     */
    readonly isTerminated: boolean;
    /**
     * Gets latest execute breakpoint activity (if executed)
     */
    readonly latestExecutedBreakpoint: NamedBreakpointActivity | null;
    /**
     * Gets callstack of activities
     */
    readonly stack: ReadonlyArray<WorkflowVirtualMachine.StackFrame>;
    readonly flags: WorkflowVirtualMachine.Flags;
    /**
     * Get persistable variables storage.
     */
    readonly variables: WorkflowVirtualMachine.Variables;
    /**
     * Get map of the breakpoints of the executed workflow
     */
    readonly breakpoints: ReadonlyMap<NamedBreakpointActivity['name'], NamedBreakpointActivity>;
    /**
     * Gets OID of current activity
     */
    readonly oid: string;
    stackPush(executionContext: FExecutionContext, index: number): Promise<void>;
    stackPop(): void;
    /**
     * Execute next workflow item
     * @returns Idle status. `true` is nothing to do (check isPaused/isTerminated flags)
     */
    tick(executionContext: FExecutionContext): Promise<boolean>;
    toJSON(): any;
}
export declare namespace WorkflowVirtualMachine {
    const enum Scope {
        /**
         * Accessible for all inner activities
         */
        INHERIT = "INHERIT",
        /**
         * Accessible for current activity only
         */
        LOCAL = "LOCAL"
    }
    interface StackFrame<TActivity extends Activity = Activity> {
        /**
         * Gets reference to an Activity related to the current stack frame
         */
        readonly activity: TActivity;
        /**
         * Gets an instance of ExecutionContext related to the current stack frame
         */
        readonly currentContext: WorkflowVirtualMachine.Context;
    }
    interface Context {
        /**
         * Gets number of calls of current activity (started from 1)
         */
        readonly callCounter: number;
        /**
         * Gets OID of current activity
         */
        readonly oid: string;
        /**
         * Gets activities call stack
         */
        readonly stack: ReadonlyArray<StackFrame>;
        /**
         * Persistable variables
         */
        readonly variables: WorkflowVirtualMachine.Variables;
        /**
         * Non-persistable workflow application flags (shared across all activities in the workflow application)
         */
        readonly flags: WorkflowVirtualMachine.Flags;
        /**
         * Gets latest execute breakpoint activity (if executed)
         */
        readonly latestExecutedBreakpoint: NamedBreakpointActivity | null;
    }
    interface NativeContext extends Context {
        setupExceptionHandler(): void;
        getExceptionData(): {
            readonly message: string;
            readonly stack: ReadonlyArray<Activity>;
        } | null;
        hasExceptionHandler(): boolean;
        stackPush(executionContext: FExecutionContext, child: number): Promise<void>;
        stackPop(): void;
    }
    type Value = boolean | number | string | null;
    interface Variables {
        defineGlobal(name: string, value: Value): void;
        defineInherit(name: string, value: Value): void;
        defineLocal(name: string, value: Value): void;
        getBoolean(name: string): boolean;
        getNullableBoolean(name: string): boolean | null;
        getInteger(name: string): number;
        getNullableInteger(name: string): number | null;
        getNumber(name: string): number;
        getNullableNumber(name: string): number | null;
        getString(name: string): string;
        getNullableString(name: string): string | null;
        has(name: string): boolean;
        hasGlobal(name: string): boolean;
        hasLocal(name: string): boolean;
        set(name: string, value: Value): void;
    }
    interface Flags {
        has(name: string): boolean;
        reset(name: string): void;
        set(name: string): void;
    }
}
export declare class WorkflowVirtualMachineExecutionContext extends FExecutionContextBase {
    static of(executionContext: FExecutionContext): WorkflowVirtualMachineExecutionElement;
    private readonly _vmContext;
    constructor(prevContext: FExecutionContext, wrap: WorkflowVirtualMachine.Context);
    get vmContext(): WorkflowVirtualMachine.Context;
}
export declare class WorkflowVirtualMachineExecutionElement<TExecutionContext extends WorkflowVirtualMachineExecutionContext = WorkflowVirtualMachineExecutionContext> extends FExecutionElement<TExecutionContext> {
    get vmContext(): WorkflowVirtualMachine.Context;
}
export declare class WorkflowVirtualMachineNativeExecutionContext extends FExecutionContextBase {
    static of(executionContext: FExecutionContext): WorkflowVirtualMachineNativeExecutionElement;
    private readonly _vmContext;
    constructor(prevContext: FExecutionContext, wrap: WorkflowVirtualMachine.NativeContext);
    get vmContext(): WorkflowVirtualMachine.NativeContext;
}
export declare class WorkflowVirtualMachineNativeExecutionElement<TExecutionContext extends WorkflowVirtualMachineNativeExecutionContext = WorkflowVirtualMachineNativeExecutionContext> extends FExecutionElement<TExecutionContext> {
    get vmContext(): WorkflowVirtualMachine.NativeContext;
}