using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;

//Define the behavior of a client
[RequireComponent(typeof(Collider2D))]
[RequireComponent(typeof(NavMeshAgent))]
public class Client_controller : MonoBehaviour, IUsable
{
    public float consumeTime = 3.0f; //Time to consume currentMug
    public float waitingTime = 10.0f; //Patience after ordering

    string _status;
    HashSet<string> _availStatus = new HashSet<string>(){"entering", "waiting", "consuming", "leaving"};
    public string status
    { 
        get{ return _status;}
        set{
            if (_availStatus.Contains(value))
                _status = value;
                Debug.Log(gameObject.name+" "+_status);
        }
    }
    
    float consumeTimer;
    float waitTimer;
    GameObject currentMug = null; //Mug currently held by the client

    //Navigation
    Vector2 destination;
    NavMeshAgent agent;

    //Handle objects interactions w/ Workshop
    //Return wether the object is taken from tavernkeeper
    public bool use(GameObject object_used)
    {
        if(currentMug is null) //No mug in hand
        {
            //TODO : Gérer Grabale qui ne sont pas des Mugs ?
            if(object_used != null && object_used.tag=="Grabable")
            {
                Mug mug = object_used.GetComponent<Mug>();
                if (mug!= null && mug.content != null)
                {
                    status = "consuming";
                    Debug.Log(gameObject.name+" "+status+" "+object_used.name+ " of "+mug.content.Type);
                    currentMug = object_used;
                    consumeTimer=consumeTime;
                    return true;
                }
                else
                {
                    Debug.Log("Display order (or something else) of "+gameObject.name);
                    return false;
                }
            }
            else
            {
                Debug.Log("Display order (or something else) of "+gameObject.name);
                return false;
            }
        }
        else
        {
            Debug.Log(gameObject.name+" already consumming "+currentMug.name);
            return false;
        }
    }

    // Start is called before the first frame update
    void Start()
    {
        if(gameObject.layer != LayerMask.NameToLayer("Interactions"))
            Debug.LogWarning(gameObject.name+" layer should be set to 'Interactions' to work properly");
        if(gameObject.tag != "Usable")
            Debug.LogWarning(gameObject.name+" tag should be set to 'Usable' to work properly");

        status = "entering";

        // Navigation //
        agent = GetComponent<NavMeshAgent>();
        //Prevent rotation of the ground at movement
        agent.updateRotation = false;
        agent.updateUpAxis = false;
        //Get target
        agent.destination = ClientManager.Instance.assignTarget();
    }

    // Update is called once per frame
    void Update()
    {
        //Navigation
        // Debug.Log(gameObject.name + " navigation : "+ agent.isStopped + " " + agent.remainingDistance);

        //Reached seat
        if(status=="entering" && agent.remainingDistance==0)
        {
            status="waiting";
            waitTimer=waitingTime;
        }

        if(status=="waiting")
        {
            waitTimer -= Time.deltaTime;
            if (waitTimer < 0) //Waited too long
            {
                //Leave tavern
                status = "leaving";
                agent.destination = ClientManager.Instance.assignTarget(agent.destination); //Request next target
            }
        }

        //Consume Timer
        if (status=="consuming" && agent.remainingDistance==0) //Consuming mug if there's one and reached destination
        {
            consumeTimer -= Time.deltaTime;
            if (consumeTimer < 0) //Finished consuming mug ?
            {
                Mug obj = currentMug.GetComponent<Mug>();
                if(obj !=null)
                {
                    obj.consume();
                    //Drop mug
                    obj.drop(gameObject.transform.position+ (Vector3)Vector2.down * 0.2f);
                    currentMug=null;
                }

                //Leave tavern
                status = "leaving";
                agent.destination = ClientManager.Instance.assignTarget(agent.destination); //Request next target
            }
        }
    }
}