using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using SiegeSong;

namespace SiegeSong 
{ 
    public class InstanceManager : MonoBehaviour
    {
        public GameObject SpeciesDefinitionsContainer;
        public GameObject ActorInstanceContainer;
        public string CurrentPlayerInstanceID;
        public GameObject[] Instances;
        public string[] InstanceIDs;
        public int[] ActorIDs;

        public string HumanSpeciesKey = "_Human";

        public int LastGeneratedInstanceIndex;

        public int MaxInstanceIDLength = 5;

        void Start()
        {
        
        }

        void Update()
        {
        
        }

        public void ClearAndUnload()
        {
            for (var i = 0; i < Instances.Length; i++)
            {
                Instances[i].active = false;
                GameObject.Destroy(Instances[i]);
            }

            LastGeneratedInstanceIndex = 0;
            CurrentPlayerInstanceID = "";
            Instances = new GameObject[0];
            InstanceIDs = new string[0];
            ActorIDs = new int[0];
        }

        public string GenerateInstanceID()
        {
            LastGeneratedInstanceIndex++;
            var instanceIndex = LastGeneratedInstanceIndex.ToString();
            var newInstanceID = "";
            for (var i = 0; i < MaxInstanceIDLength; i++)
            {
                if (i >= instanceIndex.Length)
                {
                    newInstanceID += "A";
                } 
                else
                {
                    newInstanceID += "BCDEFGHIJK"[int.Parse(instanceIndex[i].ToString())];
                }
            }
            return newInstanceID;
        }

        public GameObject GetInstanceByID(string instanceID)
        {
            for(var i = 0; i < Instances.Length; i++)
            {
                if (InstanceIDs[i].ToLower() == instanceID.ToLower())
                {
                    return Instances[i];
                }
            }
            return new GameObject();
        }

        public void AddInstance(string instanceID, GameObject newInstance)
        {
            var newInstanceArray = new GameObject[Instances.Length + 1];
            var newInstanceIDArray = new string[InstanceIDs.Length + 1];
            Instances.CopyTo(newInstanceArray, 0);
            InstanceIDs.CopyTo(newInstanceIDArray, 0);
            newInstanceArray[newInstanceArray.Length - 1] = newInstance;
            newInstanceIDArray[newInstanceIDArray.Length - 1] = instanceID;
            Instances = newInstanceArray;
            InstanceIDs = newInstanceIDArray;
            newInstance.transform.parent = ActorInstanceContainer.transform;
        }

        public void RemoveInstance(string instanceID)
        {
            var newInstanceArray = new GameObject[Instances.Length - 1];
            var newInstanceIDArray = new string[InstanceIDs.Length - 1];
            Instances.CopyTo(newInstanceArray, 0);
            InstanceIDs.CopyTo(newInstanceIDArray, 0);
            var iterator = 0;
            var index = 0;
            foreach (var instance in Instances)
            {
                iterator++;
                if (InstanceIDs[iterator].ToLower() == instanceID.ToLower())
                {
                    var instanceObject = Instances[iterator];
                    GameObject.Destroy(instanceObject);
                }
                else
                {
                    index++;
                    newInstanceArray[index] = instance;
                    newInstanceIDArray[index] = InstanceIDs[iterator];
                }
            }
            Instances = newInstanceArray;
            InstanceIDs = newInstanceIDArray;
        }
    }
}