import { JSONSchema } from 'mongochangestream';
import type { ChangeStreamDocument } from 'mongodb';
import { Mapper, Node } from 'obj-walker';
interface RenameOption {
    /** Dotted path to renamed dotted path */
    rename?: Record<string, string>;
}
export interface OptimizationOptions {
    /**
     * Automatically optimize inserts by batching them together and flushing
     * the insert queue when a non-insert event is received or a queue threshold
     * is met - length, size in bytes, timeout, etc.
     */
    autoOptimizeInserts?: boolean;
}
export interface SyncOptions extends RenameOption {
    schemaName?: string;
    tableName?: string;
    /**
     * Map over values (leaf nodes). This can be used to limit
     * the length of strings since there is a 32k character limit
     * for text fields with the default columnar index.
     * @example
     * ```typescript
     * const mapper = (node: Node) => {
     *   if (typeof node.val === 'string') {
     *     return node.val.slice(0, 250)
     *   }
     *   return node.val
     * }
     * ```
     */
    mapper?: (node: Node) => unknown;
}
export interface Override extends Record<string, any> {
    path: string;
    mapper?: (obj: JSONSchema, path: string) => JSONSchema;
    flags?: string[];
}
export interface ConvertOptions extends RenameOption {
    /**
     * An obj-walker Mapper function that can be used as an "escape hatch" to
     * preprocess each node in the object (using `map`) before using `walk` to
     * convert the object into the output Crate schema.
     *
     * This can be useful in situations where you want to replace or remove a
     * non-leaf node.
     *
     * @example
     * ```typescript
     * const mapSchema = ({ path, val }) => {
     *   if (_.isEqual(path, ['properties', 'addresses', 'items'])) {
     *     // This should result in OBJECT(IGNORED), since there are no
     *     // properties.
     *     return { bsonType: 'object' }
     *   }
     *
     *   return val
     * }
     * ```
     */
    mapSchema?: Mapper;
    omit?: string[];
    overrides?: Override[];
    /**
     * Enable to take into account `additionalProperties`. Otherwise,
     * all objects allow for dynamic fields. In both cases, objects
     * with no defined properties are set to `OBJECT(IGNORED)`.
     */
    strictMode?: boolean;
}
export type Events = 'process';
type OperationCounts = Partial<Record<ChangeStreamDocument['operationType'], number>>;
interface BaseProcessEvent {
    type: 'process';
    success: number;
    fail: number;
    /** _id of failed documents */
    failedDocs?: unknown[];
    operationCounts: OperationCounts;
}
export interface InitialScanProcessEvent extends BaseProcessEvent {
    initialScan: true;
}
export interface ChangeStreamProcessEvent extends BaseProcessEvent {
    changeStream: true;
}
export type ProcessEvent = InitialScanProcessEvent | ChangeStreamProcessEvent;
export interface ErrorLike {
    message?: string;
}
export {};