import { IParserLine } from "../models/IParserLine";

export class Line implements IParserLine {
    private _segments: string[] | null  = new Array<string>(0);

    /**
     * Regular Expression used for the parsing
     */
    get regEx(): RegExp {
        return /(?!\B"[^"]*),(?![^"]*"\B)/;
    }
    get elementCount(): number {
        if (this._segments == null) { return 0; }
        return this._segments.length;
    }
    get items(): string[] {
        return this._segments || [];
    }
    /**
     *
     * @param lineNo The line number/position in the delimited file
     * @param line The unparsed/raw line of the delimited file
     * @param delimiter The delimiter that is to be used for the parsing
     */
    constructor(public lineNo: number, private line: string) {
        this._segments = this.splitArray();
    }

    /**
     * Splits the string into its components
     * @returns {(string[] | null)} The result of the split in the form on an array
     *
     */
    private splitArray(): string[] | null {
        if (this.line == null || this.line.length === 0) { return null; }
        const array = this.line.split(this.regEx);

        return array;
    }

    /**
     * Returns the delimited as an array
     *
     * @returns {(string[] | null)}
     * @memberof LineParser
     */
    toArray(): string[] | null {
        return this._segments;
    }
}