//================================================================
/**
 * @packageDocumentation
 * @module std
 */
//================================================================
import { InsertIteratorBase } from "../internal/iterator/InsertIteratorBase";
import { IPushBack } from "../internal/container/partial/IPushBack";
import { Vector } from "../container/Vector";
import { equal_to } from "../functional/comparators";

/**
 * Back insert iterator.
 *
 * @author Jeongho Nam - https://github.com/samchon
 */
export class BackInsertIterator<
    Source extends IPushBack<BackInsertIterator.ValueType<Source>>,
> extends InsertIteratorBase<
    BackInsertIterator.ValueType<Source>,
    BackInsertIterator<Source>
> {
    private source_: Source;

    /* ---------------------------------------------------------
        METHODS
    --------------------------------------------------------- */
    /**
     * Initializer Constructor.
     *
     * @param source The source container.
     */
    public constructor(source: Source) {
        super();
        this.source_ = source;
    }

    /**
     * @inheritDoc
     */
    public set value(val: BackInsertIterator.ValueType<Source>) {
        this.source_.push_back(val);
    }

    /**
     * @inheritDoc
     */
    public equals(obj: BackInsertIterator<Source>): boolean {
        return equal_to(this.source_, obj.source_);
    }
}

/**
 *
 */
export namespace BackInsertIterator {
    /**
     * Deduct value type.
     */
    export type ValueType<Source extends IPushBack<any>> =
        Source extends IPushBack<infer T> ? T : unknown;

    /**
     * Deduct source type.
     */
    export type SourceType<Source extends Array<any> | IPushBack<any>> =
        Source extends Array<infer T> ? Vector<T> : Source;
}