import { ChangeEvent } from 'react';
export declare type ErrorValue = string | undefined;
export interface Validator<Value, Context> {
    (value: Value, context: Context): ErrorValue;
}
export interface ListValidationContext<Item extends object> {
    listItem: FieldStates<Item>;
    siblings: FieldStates<Item>[];
}
export declare type Validates<Value, Context extends object = {}> = Validator<Value, Context> | Validator<Value, Context>[];
export declare type NormalizedValidationDictionary<ListItem extends object> = {
    [Key in keyof ListItem]: Validator<ListItem[Key], ListValidationContext<ListItem>>[];
};
export declare type ValidationDictionary<ListItem extends object, Context extends object = {}> = {
    [Key in keyof ListItem]: Validates<ListItem[Key], Context>;
};
export interface FieldState<Value> {
    value: Value;
    defaultValue: Value;
    error: ErrorValue;
    touched: boolean;
    dirty: boolean;
}
export declare type FieldStates<Record extends object> = {
    [Key in keyof Record]: FieldState<Record[Key]>;
};
export interface Field<Value> {
    value: Value;
    error: ErrorValue;
    defaultValue: Value;
    touched: boolean;
    dirty: boolean;
    onBlur(): void;
    onChange(value: Value | ChangeEvent<HTMLInputElement>): void;
    runValidation(): ErrorValue;
    setError(value: ErrorValue): void;
    newDefaultValue(value: Value): void;
    reset(): void;
}
export declare type FieldDictionary<Record extends object> = {
    [Key in keyof Record]: Field<Record[Key]>;
};
export interface Form<T extends FieldBag> {
    fields: T;
    dirty: boolean;
    submitting: boolean;
    submitErrors: FormError[];
    validate(): FormError[];
    reset(): void;
    submit(event?: React.FormEvent): void;
}
export interface FormError {
    fieldPath?: string[];
    message: string;
}
export declare type SubmitResult = {
    status: 'fail';
    errors: FormError[];
} | {
    status: 'success';
};
export declare type FieldOutput<T extends object> = FieldDictionary<T> | Field<T> | FieldDictionary<T>[];
export interface FieldBag {
    [key: string]: FieldOutput<any>;
}
export interface SubmitHandler<Fields> {
    (fields: Fields): Promise<SubmitResult>;
}
declare type FieldProp<T, K extends keyof Field<any>> = T extends Field<any> ? T[K] : T extends FieldDictionary<any> ? {
    [InnerKey in keyof T]: T[InnerKey][K];
} : T;
export declare type FormMapping<Bag extends {
    [key: string]: FieldOutput<any>;
}, FieldKey extends keyof Field<any>> = {
    [Key in keyof Bag]: Bag[Key] extends any[] ? {
        [Index in keyof Bag[Key]]: FieldProp<Bag[Key][Index], FieldKey>;
    } : FieldProp<Bag[Key], FieldKey>;
};
export {};