import {IAppendValueParams} from "./IAppendValueParams";
import {IDictionary} from '@itexpert-dev/i-dictionary'
import {isNull, isUndefined} from "@itexpert-dev/tiny-helpers";

export class KeyValueStorage<U>{
    private _storage: IDictionary<U> = {};

    private forceAppend(params: IAppendValueParams<U>){
        this._storage[params.key] = params.value
    }
    public add(...params: IAppendValueParams<U>[]){
        for(let param of params){
            if(isNull(param.key)){
                throw new Error(`can not put data with null key`)
            }
            if(isUndefined(param.key)){
                throw new Error(`can not put data with undefined key`)
            }
            if(this._storage.hasOwnProperty(param.key)) {
                if (param.force === true) {
                    this.forceAppend(param)
                } else {
                    throw new Error(`data with key ${param.key} already exist use force=true flag for override`)
                }
            } else {
                this.forceAppend(param)
            }
        }
    }
    public remove(key: string){
        delete this._storage[key]
    }
    public get(key: string): U{
        if (!this._storage.hasOwnProperty(key)){
            throw new Error(`data with key: ${key} is missing!`);
        }
        return this._storage[key]
    }

    public check(key: string): boolean{
        return this._storage.hasOwnProperty(key);
    }
}