import {IKey} from "./IKey";

export class Key implements IKey{
    primaryKey: string;
    secondaryKey: string;

    constructor(primaryKey?: string, secondaryKey?: string) {

        this.primaryKey = primaryKey;
        this.secondaryKey = secondaryKey;
    }

    asSingleComponentKey(): string {

        return Key.asSingleComponentKey(this.primaryKey, this.secondaryKey);
    }

    static asSingleComponentKey(primaryKey: string , secondaryKey: string): string {

        if (primaryKey == null) {
            throw new Error("primary key cannot be null");
        }

        return `${primaryKey}${(secondaryKey == null) || (secondaryKey === "") ? "" : `:${secondaryKey}`}`;
    }

    static fromSingleComponentKey(source: string): IKey {

        if (source == null) {
            throw new Error("source cannot be null");
        }

        const components = source.split(":");

        if (components.length < 2) {
            return new Key(source, "");
        }

        const primaryKey = components.slice(0, components.length - 2).join(":");
        const secondaryKey = components[components.length - 1];

        return new Key(primaryKey, secondaryKey);
    }
}