import { Context } from "koa";
import Router from "@koa/router";
import { FormData, FormDataValue, FormMessage, FormReaction } from "./form-types.js";
import { Fields, MountableWithFields, PageErrorMessage } from "../page/mountable-with-fields.js";
import { Readable } from "stream";
import { FormField } from "../index.js";
import { FieldMessages } from "./controls/form-control.js";
export declare abstract class Form<F extends Fields, SubmitResult> extends MountableWithFields<F> {
    defaultSuccessMessage: string;
    submitButtonText: string;
    action: string;
    useTurbo: boolean;
    form_id: string;
    canAccess(_: Context): Promise<{
        canAccess: boolean;
        message: string;
    }>;
    renderError(_: Context, error: PageErrorMessage): Promise<JSX.Element | Readable>;
    makeSubmitButton(): JSX.Element;
    render(ctx: Context, data: FormData, show_field_errors: boolean): Promise<JSX.Element | Readable>;
    makeFormClasses(_ctx: Context): Promise<string[]>;
    makeOpenFormTag(ctx: Context): JSX.Element;
    makeCloseFormTag(): JSX.Element;
    onValuesInvalid(ctx: Context, form_messages: FormMessage[], field_errors: FieldMessages<keyof Fields>): Promise<FormReaction>;
    onError(ctx: Context, data: FormData, error: unknown): Promise<FormReaction>;
    abstract onSubmit(ctx: Context, data: FormData): SubmitResult | Promise<SubmitResult>;
    onSuccess(ctx: Context, _data: FormData, _submitResult: SubmitResult): Promise<FormReaction>;
    getRawValuesOnSuccess(ctx: Context): Promise<Record<string, FormDataValue>>;
    handlePost(ctx: Context): Promise<FormReaction>;
    init(path: string, router: Router): void;
    mount(router: Router, path: string): void;
    extractRawValues(ctx: Context): Promise<Record<string, FormDataValue>>;
    static initFieldNames(fields: Record<string, FormField>): void;
}