import { Observable } from 'rxjs';
import { PersistentWorkItem } from './persistent-work-item';
import { PersistentWorkItemApplyState } from './persistent-work-item-apply-state';
import { PersistentWorkflow } from './persistent-workflow';
/**
 * Store the custom checkpoint data if necessary.
 */
export interface PersistentWorkflowContextStore<TTransitData, TPersistentData> {
    /**
     * Store current context to allow restore.
     *
     * @param workItem the work item.
     * @param context the context of workflow.
     */
    save(workItem: PersistentWorkItem<PersistentWorkflowContext<TTransitData, TPersistentData>>, context: PersistentWorkflowContext<TTransitData, TPersistentData>): Observable<void>;
}
/**
 * The logging record.
 */
export interface PersistentWorkflowLog {
    /**
     * The timestamp.
     */
    time: number;
    /**
     * The name of work item.
     */
    name: string;
    /**
     * The state of work item.
     */
    state: string;
}
/**
 * The context of workflow.
 */
export interface PersistentWorkflowContext<TTransitData, TPersistentData> {
    /**
     * The transit data which wouldn't be stored into persistent store, but can pass around within a workflow cycle.
     */
    transitData: TTransitData;
    /**
     * The persistent data which would be saved and would be restored when browser was closed/reopened.
     */
    persistentData: TPersistentData;
    /**
     * The store interface to take a snapshot at during a call.
     */
    store: PersistentWorkflowContextStore<TTransitData, TPersistentData>;
    /**
     * The state of applying condition after preValidate() call.
     */
    applyState: PersistentWorkItemApplyState;
    /**
     * The logging of state change.
     */
    logs: PersistentWorkflowLog[];
    /**
     * The workflow instance.
     */
    workflow: PersistentWorkflow;
    /**
     * The version of restored workflow.
     */
    restoreVersion?: number;
    /**
     * The error object.
     */
    error?: any;
    /**
     * The instance ID.
     */
    instanceId?: number;
}