using GTANetworkAPI;
using reallife_gamemode.Model;
using reallife_gamemode.Server.Commands;
using reallife_gamemode.Server.Entities;
using reallife_gamemode.Server.Extensions;
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();
                }
            }
        }

        public static void GetUserItems(Client player)
        {
            var user = player.GetUser();
            var inventoryWeight = 0;

            using (var context = new DatabaseContext())
            {
                List<UserItem> userItems = context.UserItems.ToList().FindAll(i => i.UserId == user.Id);
                string[][] items = new string[userItems.Count][];
                foreach (var item in userItems)
                {
                    IItem iItem = GetItemById(item.ItemId);
                    var currentItemWeight = iItem.Gewicht * item.Amount;
                    inventoryWeight += currentItemWeight;

                    items[userItems.IndexOf(item)] = new string[6];
                    items[userItems.IndexOf(item)][0] = iItem.Name;
                    items[userItems.IndexOf(item)][1] = iItem.Description;
                    items[userItems.IndexOf(item)][2] = iItem.Gewicht.ToString();
                    items[userItems.IndexOf(item)][3] = item.Amount.ToString();
                    items[userItems.IndexOf(item)][4] = item.Slot.ToString();
                    items[userItems.IndexOf(item)][5] = item.Id.ToString();
                }
                player.TriggerEvent("showInventory", inventoryWeight, items);
            }
        }

        [RemoteEvent("saveInventory")]
        public void SavePlayerInteroy(Client player, string[][] itemArray)
        {
            var user = player.GetUser();
            string[][] items = new string[itemArray.Length][];

            List<UserItem> userItems = new List<UserItem>();

            using (var context = new DatabaseContext())
            {
                foreach (var item in items)
                {
                    UserItem cItem = new UserItem
                    {
                        Amount = int.Parse(item[3]),
                        ItemId = GetItemByName(item[0]).Id,
                        UserId = user.Id,
                        Slot = int.Parse(item[4]),
                    };

                    if (item[5] == "-1")
                    {
                        player.SendChatMessage("Item hinzugefügt");
                        context.Add(cItem);
                    }
                    else if(cItem.Slot == -1)
                    {
                        player.SendChatMessage("Item gelöscht");
                        UserItem fItem = context.UserItems.FirstOrDefault(i => i.Id == int.Parse(item[5]));
                        userItems.Remove(fItem);
                    }
                    else
                    {
                        player.SendChatMessage("Item geändert");
                        UserItem fItem = context.UserItems.FirstOrDefault(i => i.Id == int.Parse(item[5]));
                        fItem.Amount = cItem.Amount;
                        fItem.Slot = cItem.Slot;
                    }                   
                }
                context.SaveChanges();
            }                   
        }
    }
}