using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using System.IO;

namespace ProjectKnapsack.classes;

public class Storage
{
    private List<KnapsackState> states;
    private int currentPosition;

    public Storage()
    {
        states = new List<KnapsackState>();
        currentPosition = 0;
    }

    public void AddState(KnapsackState state)
    {
        states.Add(state);
    }

    public KnapsackState GetState(int index)
    {
        return states[index];
    }

    public int StateCount => states.Count;

    public void SaveToFile(string filename)
    {
        var options = new JsonSerializerOptions { WriteIndented = true };
        var json = JsonSerializer.Serialize(states, options);
        File.WriteAllText(filename, json);
    }

    public void LoadFromFile(string filename)
    {
        var json = File.ReadAllText(filename);
        states = JsonSerializer.Deserialize<List<KnapsackState>>(json);
    }

    public void Reset()
    {
        currentPosition = 0;
    }
}