using System;
using System.Collections.Generic;
using System.IO;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

public static class ItemLoader
{
    public static List<Item> LoadAllItems(string path)
    {
        //Check to see if the file exists. If not, just create a blank List.
        if (!File.Exists(path))
        {
            return new List<Item>();
        }

        //Dump the entirely of the file into a string.
        string json = File.ReadAllText(path);

        //Create a new variable with our custom JSON serializer settings that allows us to make mixed Lists.
        var settings = new JsonSerializerSettings
        {
            Converters = { new ItemConverter() }
        };

        //Return a list with different Items mixed in, or return a blank list.
        return JsonConvert.DeserializeObject<List<Item>>(json, settings) ?? new List<Item>();
    }

    //Returns all the HealingItems in a list.
    public static List<HealingItem> LoadHealingItemsFromList(List<Item> input)
    {
        List<HealingItem> healingitems = input
            .OfType<HealingItem>()
            .ToList();
        return healingitems;
    }
}