package Models.Program;

import Exceptions.BaseException;

import java.util.Collection;
import java.util.Hashtable;

public class GenericDictionary<K, V> implements IDictionary<K, V> {
    private Hashtable<K, V> dictionary;

    public GenericDictionary() {
        dictionary = new Hashtable<K, V>();
    }

    public void add(K key, V value) throws BaseException {
        if (dictionary.containsKey(key)) {
            throw new BaseException("Key already exists in dictionary.");
        }

        dictionary.put(key, value);
    }

    public void update(K key, V value) throws BaseException {
        if (!dictionary.containsKey(key)) {
            throw new BaseException("Key does not exist in dictionary.");
        }

        dictionary.put(key, value);
    }

    public void remove(K key) throws BaseException {
        if (!dictionary.containsKey(key)) {
            throw new BaseException("Key does not exist in dictionary.");
        }
        dictionary.remove(key);
    }

    public V get(K key) throws BaseException {
        if (!dictionary.containsKey(key)) {
            throw new BaseException("Key does not exist in dictionary.");
        }

        return dictionary.get(key);
    }

    public boolean contains(K key) {
        return dictionary.containsKey(key);
    }

    public String toString() {
        var sb = new StringBuilder();
        for (var key : dictionary.keySet()) {
            sb.append(key);
            sb.append(" --> ");
            sb.append(dictionary.get(key));
            sb.append("\n");
        }
        return sb.toString();
    }

    public Collection<V> getContent() {
        return dictionary.values();
    }

    public IDictionary<K, V> copy() {
        var newDictionary = new GenericDictionary<K, V>();
        for (var key : dictionary.keySet()) {
            newDictionary.dictionary.put(key, dictionary.get(key));
        }
        return newDictionary;
    }
}