using UnityEngine;
using System.Collections.Generic;
using System.Linq;
using Newtonsoft.Json;
using System;
using Octopus.Simulator;

#region class
public interface IStatusUpdateStatistics
{
    long current_length { get; }
    long capacity { get; }
}

public class StoreStatusUpdateData
{
    public StoreStatusUpdateDatastatistics statistics;
}

public class StoreStatusUpdateDatastatistics : IStatusUpdateStatistics
{
    public long current_length;
    public long capacity;

    long IStatusUpdateStatistics.current_length => current_length;
    long IStatusUpdateStatistics.capacity => capacity;
}

public class QueueStatusUpdateData
{
    public QueueStatusUpdateDatastatistics statistics;
}

public class QueueStatusUpdateDatastatistics : IStatusUpdateStatistics
{
    public long current_length;
    public long capacity;

    long IStatusUpdateStatistics.current_length => current_length;
    long IStatusUpdateStatistics.capacity => capacity;
}

public enum StoreBehavior
{
    FIFO,
    LIFO
}
#endregion

public class SimulationModelStore : SimulationModel
{
    [Header("Configuration")]
    public List<Transform> storePositions = new List<Transform>();
    public List<Transform> transporterPositions = new List<Transform>();

    public List<GameObject> storedProducts = new List<GameObject>();
    public int maxCapacity;
    public StoreBehavior storeType = StoreBehavior.FIFO;



    protected override void init()
    {
        base.init();
        maxCapacity = storePositions.Count;
    }

    public void StoreProduct(GameObject product)
    {
        if (product == null) return;

        product.transform.parent = transform;

        Transform emptySlot = storePositions.FirstOrDefault(slot => slot.childCount == 0);
        if (emptySlot != null)
        {
            product.transform.SetParent(emptySlot, false);
        }

        product.transform.localPosition = Vector3.zero;
        product.transform.localRotation = Quaternion.identity;
        storedProducts.Add(product);
    }

    public GameObject GetProduct()
    {
        if (storedProducts.Count == 0)
            return null;

        GameObject product = storeType == StoreBehavior.FIFO
            ? storedProducts[0]
            : storedProducts[storedProducts.Count - 1];

        if (storeType == StoreBehavior.FIFO)
            storedProducts.RemoveAt(0);
        else
            storedProducts.RemoveAt(storedProducts.Count - 1);

        return product;
    }

    public Transform GetTransporterPosition()
    {
        if (transporterPositions == null || transporterPositions.Count == 0)
            return null;

        int idx = UnityEngine.Random.Range(0, transporterPositions.Count);
        return transporterPositions[idx];
    }

    private void AdjustToTarget(IStatusUpdateStatistics status)
    {
        if (status == null) return;

        int current = storedProducts.Count;
        long target = status.current_length;
        int capacity = storePositions.Count;

        if (capacity <= 0)
            return;

        if (current < target)
        {
            int availableSlots = capacity - current;
            int spawnCount = (int)Mathf.Min(target - current, availableSlots);
            for (int i = 0; i < spawnCount; i++)
            {
                Transform emptySlot = storePositions.FirstOrDefault(slot => slot.childCount == 0);
                if (emptySlot == null)
                    break;

                GameObject prod = ProductManager.Instance.SpawnProduct();
                prod.transform.SetParent(emptySlot, false);
                storedProducts.Add(prod);
            }
        }
        else if (current > target)
        {
            int removeCount = (int)(current - target);
            for (int i = 0; i < removeCount; i++)
            {
                GameObject prod = storeType == StoreBehavior.FIFO
                    ? storedProducts.FirstOrDefault()
                    : storedProducts.LastOrDefault();

                if (prod == null)
                    continue;

                if (storeType == StoreBehavior.FIFO)
                    storedProducts.RemoveAt(0);
                else
                    storedProducts.RemoveAt(storedProducts.Count - 1);

                Destroy(prod);
            }
        }
    }

    public override void GetData(string data)
    {
        var wrapclass = JsonConvert.DeserializeObject<SimulationDefaultJson>(data);
        switch (wrapclass._event)
        {
            case "store_status_update":
                var storeStatus = JsonConvert.DeserializeObject<StoreStatusUpdateData>(wrapclass.data.ToString());
                AdjustToTarget(storeStatus?.statistics);
                SetBubble(storeStatus.statistics.current_length);
                SetBubbleDetail_Store(storeStatus.statistics);
                break;
            case "queue_status_update":
                var queueStatus = JsonConvert.DeserializeObject<QueueStatusUpdateData>(wrapclass.data.ToString());
                AdjustToTarget(queueStatus?.statistics);
                SetBubble(queueStatus.statistics.current_length);
                SetBubbleDetail_Queue(queueStatus.statistics);
                break;
            default:
                break;
        }
    }

    public override void SetBubble(object data)
    {
        string msg = data.ToString();

        if (currentBubble == null)
        {
            // »ý¼º
            currentBubble = Instantiate(bubbleUIPrefab, FindAnyObjectByType<Canvas_Bubble>().transform);
            currentBubble.target = DataBubbleSocket;
            currentBubble.worldOffset = new Vector3(0, 0, 0);  // ÇÊ¿ä¿¡ µû¶ó Á¶Àý
            currentBubble.GetComponent<RectTransform>().SetAsFirstSibling();
        }
        // ÅؽºÆ® °»½Å
        currentBubble.SetMessage(msg);
    }

    public void SetBubbleDetail_Store(object data)
    {
        if (currentBubble != null)
        {
            currentBubble.SetDetail(data, logicType.store, LogicUIManager.instance.GetItemLabelByID(nodeID));
        }
    }

    public void SetBubbleDetail_Queue(object data)
    {
        if (currentBubble != null)
        {
            currentBubble.SetDetail(data, logicType.queue, LogicUIManager.instance.GetItemLabelByID(nodeID));
        }
    }
}