import { Options as CosmiconfigOptions } from "cosmiconfig";
import DataFile from "./data-file";
/** Logger */
export interface Logger {
    log: (...args: Array<any>) => any;
}
export declare type LogLevel = "error" | "warn" | "info" | "http" | "verbose" | "debug" | "silly";
/** Data file format. */
export declare type FileFormat = "" | "json" | "yaml" | "js";
/** Writeable Data file format. */
export declare type WritableFileFormat = "json" | "yaml";
/** @ignore */
export declare type PrettierConfig = Record<string, any> | null | undefined;
/** @ignore */
export declare type Key = string | number | undefined | null;
/** @ignore */
export declare type StringDataPath = string | number | undefined | null;
/** @ignore */
export declare type DataPath = Key | Key[];
export declare type PredicateFunction = 
/**
 * Callback function to test whether operation should be performed. If result is false, operation is not performed.
 *
 * @param value is the value to be modified.
 * @param key is the key of the changed value.
 * @param data is the object/array to get value from.
 * @param path is the full data path of the value in root data.
 * @param dataFile is the DataFile instance.
 * @returns whether operation should be done.
 */
(value: any, key: Key, data: object, path: Key[], dataFile: DataFile) => boolean;
export declare type ValueFunction = 
/**
 * If a function is provided instead of value, return value of the function is used as new value.
 *
 * @param value is the value to be modified.
 * @param key is the key of the changed value.
 * @param data is the object/array to get value from.
 * @param path is the full data path of the value in root data.
 * @param dataFile is the DataFile instance.
 * @returns whether operation should be done.
 */
(value: any, key: Key, data: object, path: Key[], dataFile: DataFile) => any;
/** [[Manager.fromData]] options. */
export interface ManagerFromDataOptions {
    /** The default format to be used if file format cannot be determined from file name and content. */
    defaultFormat?: WritableFileFormat;
    /** If only some part of the data/config will be used, this is the data path to be used. For example if this is `scripts`, only `script` key of the data is loaded. */
    rootDataPath?: DataPath;
    /** Whether file can be saved using this library. */
    readOnly?: boolean;
    /** Whether to save file only if data is changed. Clones initial data deeply to check during save. */
    saveIfChanged?: boolean;
}
/** [[Manager.load]] options. */
export interface ManagerLoadOptions extends ManagerFromDataOptions {
    /** The default data to be used if file does not exist. */
    defaultData?: any;
    /** Whether to use {@link cosmiconfig https://www.npmjs.com/package/cosmiconfig} to load configuration. Set `true` for default cosmiconfig options or provide an object with `options` for cosmiconfig options and `searchFrom` to provide `cosmiconfig.search()` parameter. */
    cosmiconfig?: boolean | {
        options?: CosmiconfigOptions;
        searchFrom?: string;
    };
}
/** [[DataFile.fromData]] options. */
export interface DataFileFromDataOptions extends ManagerFromDataOptions {
    /** Winston compatible logger to be used when logging. */
    logger?: Logger;
    /** Root directory for file. If provided, relative path is based on this root directory. */
    rootDir?: string;
    /** Prettier configuration to be used. If not provided determined automatically. */
    prettierConfig?: PrettierConfig;
}
/** [[DatFile.load]] options. */
export interface DataFileLoadOptions extends DataFileFromDataOptions {
    /** If only some part of the data/config will be used, this is the data path to be used. For example if this is `scripts`, only `script` key of the data is loaded. */
    defaultData?: object;
    /** Whether to use {@link cosmiconfig https://www.npmjs.com/package/cosmiconfig} to load configuration. Set `true` for default cosmiconfig options or provide an object with `options` for cosmiconfig options and `searchFrom` to provide `cosmiconfig.search()` parameter. */
    cosmiconfig?: boolean | {
        options?: CosmiconfigOptions;
        searchFrom?: string;
    };
}
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