using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.Tracing;
using UnityEngine;
using UnityEngine.UI;

public class NPCManager : MonoBehaviour
{
    public static NPCManager Instance { get; private set; }

    private List<NPC> npcs;
    private void Awake()
    {
        Instance = this;
    }

    // Start is called before the first frame update
    void Start()
    {
        npcs = new List<NPC>();
    }

    public void processEntityUpdate(int entityId, int flags, int npcType, float x, float z, int deltaMultiplier, float face, float normalizedHealth)
    {
        bool entityFound = false;
        foreach (NPC npc in npcs)
        {
            if (npc.GetID() == entityId)
            {
                entityFound = true;
                //Debug.Log("EntityID: " + entityId);
                npc.processUpdateMessage(entityId, x, z, deltaMultiplier, face, normalizedHealth);
                //process packet here
                return;
            }
        }
        if (!entityFound)
        {
            //create new entity here
            CreateEntity(entityId, npcType, flags, x, z);
        }
    }

    public void DestroyAllLocalPlayersNPCs()
    {
        for (int i = npcs.Count - 1; i >= 0; i--)
        {
            Destroy(npcs[i]);
        }
        npcs.Clear();
    }

    public void InitializeNpc(int entityId, int weaponId, float moveSpeed, float scale, float h, float s, float v)
    {
        foreach (NPC npc in npcs)
        {
            if (npc.GetID() == entityId)
            {
                npc.getNA().InitializeVisuals(weaponId, scale, h, s, v);
				//try and get localNPC component
				
				if (npc.l != null)
				{
                    npc.l.setMoveSpeed(moveSpeed);
				}
				return;
			}
		}
	}
			

    public void ProcessProjectileUpdate(int entityId, int targetPlayerId, string projectile)
    {
        //if (entityId == Player.Instance.GetID()) { return; }

        foreach (NPC npc in npcs)
        {
            if (npc.GetID() == entityId)
            {
                npc.getNA().FireProjectile(targetPlayerId, projectile);
            }
        }
    }

    public void AnimationUpdate(int npcId, string anim)
    {
        foreach (NPC npc in npcs)
        {
            if (npc.GetID() == npcId)
            {
                npc.PlayAnimation(anim);
                return;
            }
        }
    }



    private void CreateEntity(int id, int type, int flags, float x, float z)
    {
        // get the npc prefab (brings the gameObject along with it)
        NPC npcPrefab = OnDemandLoader.Load<NPC>("Prefabs/NPCs/" + type);
        NPC npcClone = Instantiate(npcPrefab, new Vector3(x, 100, z), Quaternion.identity);
        npcClone.getNA().BindEntityToTerrain();

        // set ID of the entity
        npcClone.SetID(id);
        npcClone.type = type;
        npcClone.name = "Entity_" + id;
        npcClone.flags = flags;

        

        npcs.Add(npcClone);
    }

    public void RemoveNPC(NPC npc)
    {
        npcs.Remove(npc);
        Destroy(npc.gameObject);
    }

    public void RemoveNPCWithID(int uuid)
    {
        NPC npc = GetNPC(uuid);
        if (npc != null)
        {
            RemoveNPC(npc);
        }
    }

    public NPC GetNPC(int uuid)
    {
        foreach (NPC npc in npcs)
        {
            if (npc.GetID() == uuid)
            {
                return npc;
            }
        }
        return null;
    }
}