import { AwilixContainer } from "awilix";
/**
 * Generic validation interface used to run validation logic on every line or record.
 * All different validation objects should implement this interface
 */
export interface ICsvValidator<TCsvLine, TBuiltLine> {
    /**
     *
     * @param value value of column or property
     * @param context includes contextual information such as line number, line, etc.
     */
    validate: (value: TBuiltLine, context: CsvParserContext<TCsvLine>) => Promise<boolean | never>;
}
export type CsvParserContext<TLine> = LineContext<TLine> & {
    column: string;
};
export type LineContext<TLine> = {
    lineNumber: number;
    line: TLine;
};
/**
 * Abstract class implementation of the IValidator interface.
 * All validation objects part of the schema should extend this class.
 */
export declare abstract class AbstractCsvValidator<TCsvLine, TBuiltLine> implements ICsvValidator<TCsvLine, TBuiltLine> {
    protected readonly container: AwilixContainer;
    constructor(container: AwilixContainer);
    abstract validate(builtLine: TBuiltLine, context: CsvParserContext<TCsvLine>): Promise<boolean | never>;
}
export type CsvSchemaColumn<TCsvLine, TBuiltLine, NameAsOptional = false> = (NameAsOptional extends false ? {
    name: string;
} : {
    name?: string;
}) & {
    required?: boolean;
    validator?: AbstractCsvValidator<TCsvLine, TBuiltLine>;
} & ({
    mapTo?: string;
    transform?: ColumnTransformer<TCsvLine>;
} | {
    match?: RegExp;
    reducer?: ColumnReducer<TCsvLine, TBuiltLine>;
    transform?: ColumnTransformer<TCsvLine>;
});
export type ColumnTransformer<TCsvLine> = (value: string, context: CsvParserContext<TCsvLine>) => unknown;
export type ColumnReducer<TCsvLine = unknown, TBuiltLine = unknown> = (builtLine: TBuiltLine, key: string, value: string, context: CsvParserContext<TCsvLine>) => TBuiltLine;
export type CsvSchema<TCsvLine = unknown, TBuiltLine = unknown> = {
    columns: CsvSchemaColumn<TCsvLine, TBuiltLine>[];
};