import { AllowedComponentProps, ComponentCustomProps, ObjectEmitsOptions, VNode, VNodeProps } from 'vue';

declare type PublicProps = VNodeProps & AllowedComponentProps & ComponentCustomProps;

declare type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends (k: infer I) => void ? I : never;

declare type EmitFn<Options = ObjectEmitsOptions, Event extends keyof Options = keyof Options> = Options extends Array<infer V>
    ? (event: V, ...args: any[]) => void
    : {} extends Options
    ? (event: string, ...args: any[]) => void
    : UnionToIntersection<
          {
              [key in Event]: Options[key] extends (...args: infer Args) => any ? (event: key, ...args: Args) => void : (event: key, ...args: any[]) => void;
          }[Event]
      >;

export class ClassComponent<Props, Slots, Emits> {
    $props: Props & PublicProps;
    $slots: Slots;
    $emit: EmitFn<Emits>;
}

export type GlobalComponentConstructor<T> = {
    new (): T;
};

/**
 * Custom types
 */
export declare type Booleanish = boolean | 'true' | 'false';

export declare type Numberish = number | string;

export declare type Nullable<T = void> = T | null | undefined;

export declare type DefaultPTOptions<T = void> = T | ((instance?: VNode) => T | undefined) | undefined;