import { MatrixClient } from "./MatrixClient";

/**
 * A MatrixClient class that handles events in sync for the /sync loop, instead
 * of trying to push its way through the /sync loop as fast as possible. It is
 * intended that the consumer extend this class and override the onWhatever()
 * functions it needs. All of the onWhatever() functions have a default behaviour
 * of doing nothing.
 */
export abstract class SynchronousMatrixClient extends MatrixClient {

    /**
     * Creates a new SynchronousMatrixClient. Note that this accepts a MatrixClient, though
     * much of the class's properties are not brought over. Always convert your MatrixClient
     * instance to a SynchronousMatrixClient as soon as possible to avoid diversion in which
     * properties are proxied over.
     * @param {MatrixClient} baseClient The client to wrap.
     */
    protected constructor(baseClient: MatrixClient) {
        super(baseClient.homeserverUrl, baseClient.accessToken, baseClient.storageProvider);
    }

    private async handleEvent(emitType: string, arg1: any, arg2: any): Promise<any> {
        if (emitType === 'account_data') await this.onAccountData(arg1);
        if (emitType === 'room.account_data') await this.onRoomAccountData(arg1, arg2);
        if (emitType === 'room.leave') await this.onRoomLeave(arg1, arg2);
        if (emitType === 'room.invite') await this.onRoomInvite(arg1, arg2);
        if (emitType === 'room.join') await this.onRoomJoin(arg1, arg2);
        if (emitType === 'room.archived') await this.onRoomArchived(arg1, arg2);
        if (emitType === 'room.upgraded') await this.onRoomUpgraded(arg1, arg2);
        if (emitType === 'room.message') await this.onRoomMessage(arg1, arg2);
        if (emitType === 'room.event') await this.onRoomEvent(arg1, arg2);

        // Still emit though for easier support of plugins.
        this.emit(emitType, arg1, arg2);
    }

    protected startSyncInternal(): Promise<any> {
        return this.startSync(this.handleEvent.bind(this));
    }

    /**
     * Handles the `account_data` event raised by the client.
     * @param {any} event The account data event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onAccountData(event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.account_data` event raised by the client.
     * @param {string} roomId The Room ID the account data applies to.
     * @param {any} event The room account data event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomAccountData(roomId: string, event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.leave` event raised by the client.
     * @param {string} roomId The Room ID the event happened in.
     * @param {any} event The event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomLeave(roomId: string, event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.invite` event raised by the client.
     * @param {string} roomId The Room ID the event happened in.
     * @param {any} event The event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomInvite(roomId: string, event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.join` event raised by the client.
     * @param {string} roomId The Room ID the event happened in.
     * @param {any} event The event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomJoin(roomId: string, event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.message` event raised by the client.
     * @param {string} roomId The Room ID the event happened in.
     * @param {any} event The event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomMessage(roomId: string, event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.archived` event raised by the client.
     * @param {string} roomId The Room ID the event happened in.
     * @param {any} event The event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomArchived(roomId: string, event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.upgraded` event raised by the client.
     * @param {string} roomId The Room ID the event happened in.
     * @param {any} event The event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomUpgraded(roomId: string, event: any): Promise<any> {
        return;
    }

    /**
     * Handles the `room.event` event raised by the client.
     * @param {string} roomId The Room ID the event happened in.
     * @param {any} event The event.
     * @returns {Promise<any>} Resolves when complete.
     */
    protected onRoomEvent(roomId: string, event: any): Promise<any> {
        return;
    }
}