using GTANetworkAPI;
using reallife_gamemode.Model;
using reallife_gamemode.Server.Commands;
using reallife_gamemode.Server.Entities;
using reallife_gamemode.Server.Inventory.Interfaces;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;

/**
* @overview Life of German Reallife - Managers InventoryManager (InventoryManager.cs)
* @author hydrant, VegaZ
* @copyright (c) 2008 - 2018 Life of German
*/

namespace reallife_gamemode.Server.Managers
{
    public class InventoryManager : Script
    {
        public static List<IItem> itemList;

        public static void LoadItems()
        {
            itemList = new List<IItem>();

            Type[] allTypes = Assembly.GetExecutingAssembly().GetTypes();
            foreach (Type item in allTypes)
            {
                if (item.GetInterfaces().Contains((typeof(IItem))))
                {
                    NAPI.Util.ConsoleOutput($"Loading Item {item.Name}");
                    if (Activator.CreateInstance(item) is IItem o)
                    {
                        if(GetItemById(o.Id) != null)
                        {
                            throw new InvalidOperationException($"Double ItemID found: {o.Id} | {o.Name}");
                        }
                        itemList.Add(o);
                    }
                }
            }
        }

        public static IItem GetItemById(int id)
        {
            return itemList.Find(i => i.Id == id);
        }

        public static IItem GetItemByName(string name)
        {
            return itemList.Find(i => i.Name.ToLower() == name.ToLower());
        }

        public static void RemoveUserItem(Entities.User user, UserItem item)
        {
            using (var dbContext = new DatabaseContext())
            {
                var userItem = dbContext.UserItems.FirstOrDefault(i => i.Id == item.Id);

                userItem.Amount--;

                dbContext.SaveChanges();

                if(userItem.Amount == 0)
                {
                    dbContext.Remove(userItem);
                    dbContext.SaveChanges();
                }
            }
        }
    }
}