using NLog;
using NLua;
using System.Diagnostics;

namespace MP.MONO.DECODER
{
    public class CounterManager
    {
        #region Public Constructors

        /// <summary>
        /// Getione contatori x check variazioni e accumulazione conteggi
        /// </summary>
        public CounterManager()
        {
            // preparo variabile x avvisare script che il modo è da NLua
            state["callMode"] = "NLua";

            // carico il file
            luaPath = Path.Combine(Directory.GetCurrentDirectory(), "lua", "CountersDecoder.lua");
            state.DoFile(luaPath);

            Log.Info("CounterManager OK");
            Console.WriteLine("CounterManager OK");
        }

        #endregion Public Constructors

        #region Public Methods

        /// <summary>
        /// Funzione chiamata (LUA) x controllo contatori + update in oggetto counter da persistere
        /// </summary>
        /// <param name="newStatusList">Situazione valori attuale</param>
        /// <returns>Dizionario valori da salvare...</returns>
        public Dictionary<string, double> processData(Dictionary<string, string> newStatusList)
        {
            DateTime adesso = DateTime.Now;
            double delta = 0;
            // accumulo frazioni di minuto solo se ho un dato temporale precedente
            if (dtLastCheck != null)
            {
                delta = adesso.Subtract((DateTime)dtLastCheck).TotalMinutes;
            }
            // preparo esecuzione
            bool calcOk = false;
            if (lastStatusList != null && lastStatusList.Count > 0)
            {
                state["delta"] = delta;
                // tab dataList
                state.NewTable("dataList");
                var currTabData = state.GetTable("dataList");
                foreach (var item in lastStatusList)
                {
                    currTabData[item.Key] = item.Value;
                }
                state["dataList"] = currTabData;

                // tab countAcc
                state.NewTable("countAcc");
                var currTabCount = state.GetTable("countAcc");
                foreach (var item in countAccum)
                {
                    currTabCount[item.Key] = item.Value;
                }
                state["countAcc"] = currTabCount;

                // call!
                try
                {
                    // effettuo calcolo
                    state.DoString("doProcess()");
                }
                catch (Exception exc)
                {
                    Log.Error($"exception during doProcess{Environment.NewLine}{exc}");
                }

                // recupero valore calcolato
                bool.TryParse(state.GetString("calcOk"), out calcOk);
                if (calcOk)
                {
                    try
                    {
                        // leggo nuovi valori accumulati..
                        var tabAccum = state.GetTable("countAcc");
                        //var dictAccum = state.GetTableDict(tabAccum);
                        var dictAccum = state["countAcc"];
                        // vado a fare upgrade...
                        string sKey = "";
                        string sVal = "";
                        double dVal = 0;
                        foreach (var item in tabAccum.Keys)
                        {
                            sKey = $"{item}";
                            sVal = $"{tabAccum[item]}";
                            dVal = 0;
                            double.TryParse(sVal, out dVal);
                            if (countAccum.ContainsKey(sKey))
                            {
                                countAccum[sKey] = dVal;
                            }
                            else
                            {
                                countAccum.Add(sKey, dVal);
                            }

                        }
                        // trace... stampo counters...
                        foreach (var cItem in countAccum.OrderBy(x => x.Key))
                        {
                            Log.Trace($"COUNTERS | {cItem.Key} | {cItem.Value}");
                        }

                    }
                    catch (Exception exc)
                    {
                        Log.Error($"exception during LUA processData{Environment.NewLine}{exc}");
                    }
                }
            }

            // salvo lastCheck
            dtLastCheck = adesso;
            // salvo ultimo stato da merge con precedente...
            foreach (var item in newStatusList)
            {
                if (lastStatusList == null)
                {
                    lastStatusList = new Dictionary<string, string>();
                }
                if (lastStatusList.ContainsKey(item.Key))
                {
                    lastStatusList[item.Key] = item.Value;
                }
                else
                {
                    lastStatusList.Add(item.Key, item.Value);
                }
            }
            // ritorno
            return countAccum;
        }

        /// <summary>
        /// Resetta l'accumulatore indicato
        /// </summary>
        /// <param name="accKey"></param>
        /// <returns></returns>
        public bool resetAccum(string accKey)
        {
            bool fatto = false;
            if (countAccum.ContainsKey(accKey))
            {
                countAccum[accKey] = 0;
            }
            return fatto;
        }

        #endregion Public Methods

        #region Protected Fields

        /// <summary>
        /// Accumulatore valori counter
        /// </summary>
        protected static Dictionary<string, double> countAccum = new Dictionary<string, double>();

        /// <summary>
        /// Elenco ultimi valori ricevuti x confronto
        /// </summary>
        protected static Dictionary<string, string> lastStatusList = new Dictionary<string, string>();

        /// <summary>
        /// Log instance
        /// </summary>
        protected static Logger Log = LogManager.GetCurrentClassLogger();

        /// <summary>
        /// Path script LUA
        /// </summary>
        protected static string luaPath = "";

        /// <summary>
        /// OBJ state da scambiare
        /// </summary>
        protected static Lua state = new Lua();

        /// <summary>
        /// DataOra ultimo check x confronto
        /// </summary>
        protected DateTime? dtLastCheck = null;

        #endregion Protected Fields
    }
}