import { Checkpoint, CheckpointMetadata } from '@langchain/langgraph'
import { RunnableConfig } from '@langchain/core/runnables'
import { IDatabaseEntity } from '../../../src'
import { DataSource } from 'typeorm'

export type SaverOptions = {
    datasourceOptions: any
    threadId: string
    appDataSource: DataSource
    databaseEntities: IDatabaseEntity
    chatflowid: string
}

export interface CheckpointTuple {
    config: RunnableConfig
    checkpoint: Checkpoint
    metadata?: CheckpointMetadata
    parentConfig?: RunnableConfig
}

export interface SerializerProtocol<D> {
    stringify(obj: D): string
    parse(data: string): Promise<D>
}