import Router from "@koa/router";
import { Context } from "koa";
import { Templatable } from "tempstream";
import { Mountable } from "./mountable.js";
export type StatefulPageActionDescription<ActionName> = {
    action: ActionName;
    label?: string;
    content?: string;
    disabled?: boolean;
} | ActionName;
export type StateAndMetadata<State, Actions> = {
    state: State;
    inputs: Record<string, string>;
    action: keyof Actions;
    action_args: string;
} | {
    state: State;
    inputs: Record<string, string>;
    action: null;
    action_args: null;
    $: Record<string, unknown>;
};
export type StatefulPageActionArgument<State extends Record<string, unknown>, Args extends unknown[] = unknown[]> = {
    ctx: Context;
    state: State;
    inputs: Record<string, string>;
    args: Args;
    page: StatefulPage<any, any>;
};
export type StatefulPageAction<State extends Record<string, unknown>, Args extends unknown[] = unknown[]> = (obj: StatefulPageActionArgument<State, Args>) => State | Promise<State>;
export type ExtractStatefulPageActionArgs<X> = X extends StatefulPageAction<any, infer Args> ? Args : never;
export declare abstract class StatefulPage<State extends Record<string, unknown>, Actions extends Record<string, StatefulPageAction<State>>> extends Mountable {
    abstract actions: Actions;
    abstract getInitialState(ctx: Context): State | Promise<State>;
    abstract render(ctx: Context, state: State, inputs: Record<string, string>): Templatable | Promise<Templatable>;
    canAccess(_ctx: Context): Promise<{
        canAccess: boolean;
        message: string;
    }>;
    constructor();
    abstract wrapInLayout(ctx: Context, content: Templatable, state: State): Templatable;
    wrapInForm(context: Context, state: State, content: Templatable): Promise<Templatable>;
    extractActionAndLabel<ActionName extends keyof Actions>(action_description: StatefulPageActionDescription<ActionName>): {
        action: string;
        label: string;
        content: string;
        disabled: boolean;
    };
    makeActionURL<ActionName extends keyof Actions>(action_description: StatefulPageActionDescription<ActionName>, ...args: ExtractStatefulPageActionArgs<Actions[ActionName]>): string;
    makeActionButton<ActionName extends keyof Actions>(_state: State, action_description: StatefulPageActionDescription<ActionName>, ...args: ExtractStatefulPageActionArgs<Actions[ActionName]>): string;
    makeActionCallback<ActionName extends keyof Actions>(action_description: {
        action: ActionName;
        label?: string;
    } | ActionName, ...args: ExtractStatefulPageActionArgs<Actions[ActionName]>): string;
    rerender(): string;
    preprocessState(values: State): Promise<State>;
    preprocessOverrides(_context: Context, _state: State, values: Record<string, unknown>): Promise<Record<string, unknown>>;
    serializeState(_context: Context, state: State): Promise<string>;
    deserializeState(_context: Context, s: string): Promise<State>;
    extractState(ctx: Context): Promise<StateAndMetadata<State, Actions>>;
    mount(router: Router, path: string): void;
}