using System;
using System.Collections.Generic;

using LightJSON;

using UnityEngine;

namespace Databases
{
    public sealed class CustomizableItemDatabase
    {
        public List<CustomizableItem> Database { get; private set; }
        private static readonly CustomizableItemDatabase _instance = new CustomizableItemDatabase();

        //This enum is coming from the console code and is used in server requests. Do not change the order or values!
        //Add only with caution.
        //This enum is referenced here: main\src\JD\gameplay\Managers\JD_CustomizableItemDatabase.h
        public enum CustomizableItemSortBy
        {
            Id = 0,
            Mojo,
            None
        };

        private CustomizableItemDatabase()
        {
            Database = new List<CustomizableItem>();
        }

        public static CustomizableItemDatabase Instance
        {
            get
            {
                return _instance;
            }
        }

        public void Setup(JSON database)
        {
            if (database != null)
            {
                JSON avatars = database.GetFieldAsObject("avatars");
                LoadCustomizableItems(avatars.Children, CustomizableItem.CustomizableItemType.Avatar);

                JSON skins = database.GetFieldAsObject("skins");
                LoadCustomizableItems(skins.Children, CustomizableItem.CustomizableItemType.Skin);
            }

        }

        public List<CustomizableItem> queryDatabase(CustomizableItem.CustomizableItemType type, int unlockType, int jDVersion)
        {
            var subset = Database.FindAll(x => x.ItemType == type
                                        && (x.JDVersion == jDVersion || jDVersion == -1)                //-1 comes from the server and is used for INVALID_JDVERSION
                                        && (x.UnlockType == unlockType));                               //if the jdVersion query parameter is invalid, do not test for matches on this parameter

            return subset;
        }

        public string getImageURI(CustomizableItem.CustomizableItemType type, int itemId)
        {
            string imageURI = getDefaultImageURI(type);
            CustomizableItem item = Database.Find(x => x.ItemType == type && x.CustomizableItemID == itemId);

            if (item != null)
            {
                imageURI = item.ImageURI;
            }

            return imageURI;
        }

        private void LoadCustomizableItems(Dictionary<string, JSON> customizableItemMap, CustomizableItem.CustomizableItemType type)
        {
            foreach (KeyValuePair<string, JSON> mapItem in customizableItemMap)
            {
                int customizableId = Int32.Parse(mapItem.Key);
                if (Database.Exists(x => x.ItemType == type && x.CustomizableItemID == customizableId))
                {
                    Debug.LogErrorFormat("The item of type {1} and id {2} already exists in the Database ", type, customizableId);
                }
                else 
                {
                    CustomizableItem newItem = new CustomizableItem();
                    newItem.ItemType = type;
                    newItem.CustomizableItemID = customizableId;
                    newItem.ItemStatus = (CustomizableItem.CustomizableItemStatus)mapItem.Value.GetFieldAsNumber("status");
                    newItem.UnlockType = (int)mapItem.Value.GetFieldAsNumber("unlockType");
                    newItem.JDVersion = (int)mapItem.Value.GetFieldAsNumber("jdVersion");
                    newItem.MojoValue = (int)mapItem.Value.GetFieldAsNumber("mojoPrice");
                    newItem.ImageURI = mapItem.Value.GetFieldAsString("url");

                    Database.Add(newItem);
                }
            }
        }

        public string getDefaultImageURI(CustomizableItem.CustomizableItemType itemType)
        {
            string imageURI = string.Empty;
            switch (itemType)
            {
                case CustomizableItem.CustomizableItemType.Avatar:
                    imageURI = "local://DancerProfile/avatar_loading";
                    break;
                case CustomizableItem.CustomizableItemType.Skin:
                    imageURI = "";
                    break;
                default:
                    Debug.AssertFormat(false, "[CustomizableItemDatabase.getDefaultImageURI] The current itemType {1} is not handled in the switch case.", itemType);
                    break;
            }

            return imageURI;
        }
    }
}