//================================================================
/**
 * @packageDocumentation
 * @module std.internal
 */
//================================================================
import { IEmpty } from "../partial/IEmpty";
import { IPush } from "../partial/IPush";
import { ISize } from "../partial/ISize";

/**
 * Base class for Adaptor Containers.
 *
 * @author Jeongho Nam - https://github.com/samchon
 */
export abstract class AdaptorContainer<
    T,
    Source extends IEmpty & ISize & IPush<T>,
    This extends AdaptorContainer<T, Source, This>,
> implements IEmpty, ISize, IPush<T>
{
    protected source_: Source;

    protected constructor(source: Source) {
        this.source_ = source;
    }

    /* ---------------------------------------------------------
        ACCESSORS
    --------------------------------------------------------- */
    /**
     * @inheritDoc
     */
    public size(): number {
        return this.source_.size();
    }

    /**
     * @inheritDoc
     */
    public empty(): boolean {
        return this.source_.empty();
    }

    /* ---------------------------------------------------------
        ELEMENTS I/O
    --------------------------------------------------------- */
    /**
     * @inheritDoc
     */
    public push(...elems: T[]): number {
        return this.source_.push(...elems);
    }

    /**
     * Remove element.
     */
    public abstract pop(): void;

    /**
     * Swap elements.
     *
     * @param obj Target container to swap.
     */
    public swap(obj: This): void {
        [this.source_, obj.source_] = [obj.source_, this.source_];
    }
}