import type {
    MagixEventListenerOptions as WhiteMagixListenerOptions,
    Event as WhiteEvent,
    EventPhase as WhiteEventPhase,
    Scope as WhiteScope,
} from "white-web-sdk";

export interface MagixEventListenerOptions extends WhiteMagixListenerOptions {
    /**
     * Rapid emitted callbacks will be slowed down to this interval (in ms).
     */
    fireInterval?: number;
    /**
     * If `true`, sent events will reach self-listeners after committed to server.
     * Otherwise the events will reach self-listeners immediately.
     */
    fireSelfEventAfterCommit?: boolean;
}

export interface MagixEventMessage<
    TPayloads = any,
    TEvent extends MagixEventTypes<TPayloads> = MagixEventTypes<TPayloads>
> extends Omit<WhiteEvent, "scope" | "phase"> {
    /** Event name */
    event: TEvent;
    /** Event Payload */
    payload: TPayloads[TEvent];
    /** Whiteboard ID of the client who dispatched the event. It will be AdminObserverId for system events. */
    authorId: number;
    scope: `${WhiteScope}`;
    phase: `${WhiteEventPhase}`;
}

export type MagixEventTypes<TPayloads = any> = Extract<keyof TPayloads, string>;

export type MagixEventPayload<
    TPayloads = any,
    TEvent extends MagixEventTypes<TPayloads> = MagixEventTypes<TPayloads>
> = TPayloads[TEvent];

export type MagixEventDispatcher<TPayloads = any> = <
    TEvent extends MagixEventTypes<TPayloads> = MagixEventTypes<TPayloads>
>(
    event: TEvent,
    payload: TPayloads[TEvent]
) => void;

export type MagixEventHandler<
    TPayloads = any,
    TEvent extends MagixEventTypes<TPayloads> = MagixEventTypes<TPayloads>
> = (message: MagixEventMessage<TPayloads, TEvent>) => void;

export type MagixEventListenerDisposer = () => void;

export type MagixEventAddListener<TPayloads = any> = <
    TEvent extends MagixEventTypes<TPayloads> = MagixEventTypes<TPayloads>
>(
    event: TEvent,
    handler: MagixEventHandler<TPayloads, TEvent>,
    options?: MagixEventListenerOptions | undefined
) => MagixEventListenerDisposer;

export type MagixEventRemoveListener<TPayloads = any> = <
    TEvent extends MagixEventTypes<TPayloads> = MagixEventTypes<TPayloads>
>(
    event: TEvent,
    handler?: MagixEventHandler<TPayloads, TEvent>
) => void;