using Newtonsoft.Json.Linq;
using UnityEngine;
using System.Collections;
using System.Collections.Concurrent;
using System.Collections.Generic;
using UnityEngine.Events;
public class SimulationModelProcess : SimulationModel
{
    public string eventUsingQueue = "processor_using_queue";
    public string eventUsingStore = "processor_using_store";
    public string eventStartBatch = "processor_batch_started";
    public string eventOutputQueue = "processor_output_queue"; 
    public List<GameObject> listProducts = new List<GameObject>();
    public Transform productPos;
    public UnityEvent onProcessStart;
    public UnityEvent onProcessEnd;
    int productCount = 0;
    float processTime = 0;
    float elapsedTime = 0;
    ConcurrentQueue<JObject> dataQueue;
    bool startBatch = false;
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        if (!startBatch) return;
        elapsedTime += Time.deltaTime;
        if (elapsedTime > processTime)
        {
            onProcessEnd?.Invoke();
            startBatch = false;
        } 
    }
    protected override IEnumerator RunSimulationCoroutine()
    {
        yield return new WaitUntil(() => !string.IsNullOrEmpty(nodeID));
        while (dataQueue == null)
        {
            dataQueue = MQTTDataBase.Instance.GetDataQueue(nodeID);
            if (dataQueue == null)
                yield return null;
            else
                break;
        }
        while (true)
        {
            if (dataQueue.IsEmpty)
            {
                yield return null;
                continue;
            }
            if (dataQueue.TryDequeue(out JObject currentData))
            {
                string eventKey = "_event";
                if (currentData.ContainsKey(eventKey))
                { 
                    string value = currentData[eventKey].ToString();
                    if (value.Contains(eventUsingQueue))
                    {
                        string[] queueIDKey = { "data", "queue_name" }; 
                        string[] loadCountKey = { "data", "required_items" };
                        string queueID = GetJsonValue(currentData, queueIDKey)?.ToString(); 
                        int loadCount = GetJsonIntValue(currentData, loadCountKey);
                        SimulationModel model = DataManager.I.GetModel(queueID);
                        SimulationModelStore storeModel = (SimulationModelStore)model;
                        for (int i = 0; i < loadCount; i++)
                        {
                            GameObject product = null;
                            yield return new WaitUntil(() => {
                                product = storeModel.GetProduct();
                                return product != null;
                            });
                            product.transform.parent = productPos;
                            product.transform.localPosition = Vector3.zero;
                            product.transform.localRotation = Quaternion.identity;
                            listProducts.Add(product);
                        } 
                    }
                    else if (value.Contains(eventUsingStore))
                    {
                        string[] queueIDKey = { "data", "store_name" };
                        string[] loadCountKey = { "data", "required_items" };
                        string queueID = GetJsonValue(currentData, queueIDKey)?.ToString();
                        int loadCount = GetJsonIntValue(currentData, loadCountKey);
                        SimulationModel model = DataManager.I.GetModel(queueID);
                        SimulationModelStore storeModel = (SimulationModelStore)model;
                        for (int i = 0; i < loadCount; i++)
                        {
                            GameObject product = null;
                            yield return new WaitUntil(() => {
                                product = storeModel.GetProduct();
                                return product != null;
                            });
                            product.transform.parent = productPos;
                            product.transform.localPosition = Vector3.zero;
                            product.transform.localRotation = Quaternion.identity;
                            listProducts.Add(product);
                        }
                    }
                    else if (value.Contains(eventStartBatch))
                    {
                        string[] productCountKey = { "data", "product_count" };
                        string[] processTimeKey = { "data", "processing_time" };
                        int productCount = GetJsonIntValue(currentData, productCountKey);
                        processTime = GetJsonFloatValue(currentData, processTimeKey);
                        elapsedTime = 0;
                        startBatch = true;
                        onProcessStart?.Invoke();
                    }
                    else if (value.Contains(eventOutputQueue))
                    {
                        string[] outputQueueKey = { "data", "queue_name" };
                        string[] productCountKey = { "data", "products_to_add" }; 
                        string queueID = GetJsonValue(currentData, outputQueueKey)?.ToString();
                        int productCount = GetJsonIntValue(currentData, productCountKey);
                        SimulationModel model = DataManager.I.GetModel(queueID);
                        SimulationModelStore storeModel = (SimulationModelStore)model;
                        for (int i = 0; i < productCount; i++)
                        {
                            if (listProducts.Count > 0)
                            {
                                GameObject product = listProducts[0];
                                storeModel.StoreProduct(product);
                                listProducts.Remove(product);
                            }
                            else
                            {
                                Debug.LogWarning("Trying to unload from empty transporter : " + nodeID);
                            }
                        }
                    }
                }
            }
            yield return null;
        }
        yield return null;
    }
}