import { ColumnBuilderConfig } from 'drizzle-orm/column-builder';
import { PgColumnBuilder } from './common';
export declare type CustomColumnBuildeConfig<T extends CustomTypeValues> = {
    data: T['data'];
    driverParam: T['driverData'];
    notNull: T['notNull'] extends undefined ? false : T['notNull'] extends true ? true : false;
    hasDefault: T['default'] extends undefined ? false : T['default'] extends true ? true : false;
};
export declare type CustomTypeValues = {
    /**
     * Required type for custom column, that will infer proper type model
     *
     * Examples:
     *
     * If you want your column to be `string` type after selecting/or on inserting - use `data: string`. Like `text`, `varchar`
     *
     * If you want your column to be `number` type after selecting/or on inserting - use `data: number`. Like `integer`
     */
    data: unknown;
    /**
     * Type helper, that represents what type database driver is accepting for specific database data type
     */
    driverData?: unknown;
    /**
     * What config type should be used for {@link CustomTypeParams} `dataType` generation
     */
    config?: Record<string, unknown>;
    /**
     * If your custom data type should be notNull by default you can use `notNull: true`
     *
     * @example
     * const customSerial = customType<{ data: number, notNull: true, default: true }>({
     * 	  dataType() {
     * 	    return 'serial';
     *    },
     * });
     */
    notNull?: boolean;
    /**
     * If your custom data type has default you can use `default: true`
     *
     * @example
     * const customSerial = customType<{ data: number, notNull: true, default: true }>({
     * 	  dataType() {
     * 	    return 'serial';
     *    },
     * });
     */
    default?: boolean;
};
export interface CustomTypeParams<T extends CustomTypeValues> {
    /**
     * Database data type string represenation, that is used for migrations
     * @example
     * ```
     * `jsonb`, `text`
     * ```
     *
     * If database data type needs additional params you can use them from `config` param
     * @example
     * ```
     * `varchar(256)`, `numeric(2,3)`
     * ```
     *
     * To make `config` be of specific type please use config generic in {@link CustomTypeValues}
     *
     * @example
     * Usage example
     * ```
     *   dataType() {
     *     return 'boolean';
     *   },
     * ```
     * Or
     * ```
     *   dataType(config) {
     * 	   return typeof config.length !== 'undefined' ? `varchar(${config.length})` : `varchar`;
     * 	 }
     * ```
     */
    dataType: (config: T['config']) => string;
    /**
     * Optional mapping function, between user input and driver
     * @example
     * For example, when using jsonb we need to map JS/TS object to string before writing to database
     * ```
     * toDriver(value: TData): string {
     * 	 return JSON.stringify(value);
     * }
     * ```
     */
    toDriver?: (value: T['data']) => T['driverData'];
    /**
     * Optional mapping function, that is responsible for data mapping from database to JS/TS code
     * @example
     * For example, when using timestamp we need to map string Date representation to JS Date
     * ```
     * fromDriver(value: string): Date {
     * 	return new Date(value);
     * },
     * ```
     */
    fromDriver?: (value: T['driverData']) => T['data'];
}
/**
 * Custom postgresql database data type generator
 */
export declare function customType<T extends CustomTypeValues>(customTypeParams: CustomTypeParams<T>): (dbName: string, fieldConfig?: T['config']) => PgColumnBuilder<ColumnBuilderConfig<CustomColumnBuildeConfig<T>>, Record<string, unknown>>;
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