using Sfs2X.Core;
using Sfs2X.Entities.Data;
using Sfs2X.Requests;
using System;
using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

public class BuildQueueGUIManager : MonoBehaviour
{
    private static readonly DateTime UnixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

    public int queueSize;
    public int oldQueueSize = 0;

    public TextMeshProUGUI timeLeft;
    public GameObject guiPanelQueuePrefab;

    public Sprite obsSatImage;

    public Image currentlyBuildingImage;

    //used to instansate planel obejcts as child
    public GameObject gridLayoutPanel;

    public List<long> buildTimeIdexs;

    public Dictionary<long, string> allItemsInQueueDict;

    public Dictionary<long, GameObject> spawnedGUIItems;
    // Start is called before the first frame update
    void Start()
    {
        allItemsInQueueDict = new Dictionary<long, string>();
        spawnedGUIItems = new Dictionary<long, GameObject>();
        ManagerMain.sfs.AddEventListener(SFSEvent.EXTENSION_RESPONSE, OnBuildShipyardQueueResponse);
    }

    public void OnClick()
    {
        GetQueueFromServer();
    }
    private void GetQueueFromServer()
    {
        ISFSObject objOut = new SFSObject();
        objOut.PutUtfString("Planet", ManagerMain.currentlySelectedObject.name);

        ManagerMain.sfs.Send(new ExtensionRequest("GetShipyardQueue", objOut));
        objOut = null;
    }

    void OnBuildShipyardQueueResponse(BaseEvent e)
    {
        bool sucessfullReply = false;
        string cmd = (string)e.Params["cmd"];
        ISFSObject objIn = (ISFSObject)e.Params["params"];

        if (cmd == "GetShipyardQueue")
        {

            if (objIn.GetLongArray("ObsSatallite").Length > 0)
            {

                //cannot be in here has to be outside this loop, but also has to be null so we can add to it from no value
                buildTimeIdexs = new List<long>();
                //must be repeated for each object
                sucessfullReply = true;
                buildTimeIdexs.AddRange(objIn.GetLongArray("ObsSatallite"));
                    foreach (var a in objIn.GetLongArray("ObsSatallite"))
                    {
                        if (!allItemsInQueueDict.ContainsKey(a))
                        {
                            allItemsInQueueDict.Add(a, "ObsSatallite");
                        }
                    }
                queueSize = buildTimeIdexs.Count;
            }
        }

        //put lowest first
        if (sucessfullReply)
        {
            buildTimeIdexs.Sort();
            SpawnIconsInQueue();
            sucessfullReply = false;

        }
    }

    public void SpawnIconsInQueue()
    {
        if(allItemsInQueueDict[buildTimeIdexs[0]] == "ObsSatallite")
        {
            currentlyBuildingImage.sprite = obsSatImage;
            if (spawnedGUIItems.ContainsKey(buildTimeIdexs[0]))
            {
                Destroy(spawnedGUIItems[buildTimeIdexs[0]]);
                spawnedGUIItems.Remove(buildTimeIdexs[0]);
            }
        }

        for (int i = 1; i < buildTimeIdexs.Count; i++)
        {
            if (!spawnedGUIItems.ContainsKey(buildTimeIdexs[i]))
            {
                GameObject guiPanel = Instantiate(guiPanelQueuePrefab);
                guiPanel.name = buildTimeIdexs[i].ToString();
                guiPanel.transform.SetParent(gridLayoutPanel.transform);
                spawnedGUIItems.Add(buildTimeIdexs[i], guiPanel);
            }
        }
        //Find the list with the most recent
    }

    public static double GetCurrentUnixTimestampMillis()
    {
        DateTime localDateTime, univDateTime;
        localDateTime = DateTime.Now;
        univDateTime = localDateTime.ToUniversalTime();
        return Math.Round((univDateTime - UnixEpoch).TotalMilliseconds);

    }

    public string CalcTime(double ms)
    {
        var parts = new List<string>();
        Action<int, string> add = (val, unit) => { if (val > 0) parts.Add(val + unit); };
        var t = TimeSpan.FromMilliseconds(ms);

        add(t.Days, "d");
        add(t.Hours, "h");
        add(t.Minutes, "m");
        add(t.Seconds, "s");

        return string.Join(" ", parts);
    }
    // Update is called once per frame
    void Update()
    {
        if (buildTimeIdexs != null)
        {
            if (!(buildTimeIdexs.Count < 1F))
            {
                if (buildTimeIdexs[0] > 0)
                {

                    double timeLeftD = buildTimeIdexs[0] - GetCurrentUnixTimestampMillis();

                    timeLeft.text = CalcTime(timeLeftD);
                    if (timeLeftD <= 0)
                    {
                        GetQueueFromServer();
                    }
                }
            }

        }
    }
}