using System.Reflection;
using System.Security;
using System.Text;
using Observatory.Framework;
using Observatory.Framework.Files.Journal.Exploration;

namespace Explorer;

internal class Explorer
{
    private IObservatoryCore ObservatoryCore;
    private ExplorerWorker ExplorerWorker;
    private Dictionary<ulong, Dictionary<int, Scan>> SystemBodyHistory;
    private Dictionary<ulong, Dictionary<int, FSSBodySignals>> BodySignalHistory;
    private Dictionary<ulong, Dictionary<int, ScanBaryCentre>> BarycentreHistory;
    private CustomCriteriaManager CustomCriteriaManager;
    private DateTime CriteriaLastModified;
    private string currentSystem = string.Empty;

    internal Explorer(ExplorerWorker explorerWorker, IObservatoryCore core)
    {
        SystemBodyHistory = new();
        BodySignalHistory = new();
        BarycentreHistory = new();
        ExplorerWorker = explorerWorker;
        ObservatoryCore = core;
        CustomCriteriaManager = new(core.GetPluginErrorLogger(explorerWorker));
        CriteriaLastModified = new DateTime(0);
    }

    public void Clear()
    {
        SystemBodyHistory.Clear();
        BodySignalHistory.Clear();
        BarycentreHistory.Clear();
    }

    public void RecordSignal(FSSBodySignals bodySignals)
    {
        if (!BodySignalHistory.ContainsKey(bodySignals.SystemAddress))
        {
            BodySignalHistory.Add(bodySignals.SystemAddress, new Dictionary<int, FSSBodySignals>());
        }

        if (!BodySignalHistory[bodySignals.SystemAddress].ContainsKey(bodySignals.BodyID))
        {
            BodySignalHistory[bodySignals.SystemAddress].Add(bodySignals.BodyID, bodySignals);
        }
    }

    public void RecordBarycentre(ScanBaryCentre scan)
    {
        if (!BarycentreHistory.ContainsKey(scan.SystemAddress))
        {
            BarycentreHistory.Add(scan.SystemAddress, new Dictionary<int, ScanBaryCentre>());
        }

        if (!BarycentreHistory[scan.SystemAddress].ContainsKey(scan.BodyID))
        {
            BarycentreHistory[scan.SystemAddress].Add(scan.BodyID, scan);
        }
    }

    private static string IncrementOrdinal(string ordinal)
    {
        var ordChar = ordinal.ToCharArray().Last();

        if (new[] {'Z', '9'}.Contains(ordChar))
        {
            ordinal = IncrementOrdinal(ordinal.Length == 1 ? " " : string.Empty + ordinal[..^1]);
            ordChar = (char)(ordChar - 10);
        }

        return ordinal[..^1] + (char)(ordChar + 1);
    }

    private static string DecrementOrdinal(string ordinal)
    {
        var ordChar = ordinal.ToCharArray().Last();

        if (new[] { 'A', '0' }.Contains(ordChar))
        {
            ordinal = DecrementOrdinal(ordinal.Length == 1 ? " " : string.Empty + ordinal[..^1]);
            ordChar = (char)(ordChar + 10);
        }

        return ordinal[..^1] + (char)(ordChar - 1);
    }

    public Scan ConvertBarycentre(ScanBaryCentre barycentre, Scan childScan)
    {
        var childAffix = childScan.BodyName
            .Replace(childScan.StarSystem, string.Empty).Trim();

        string baryName;

        if (!string.IsNullOrEmpty(childAffix))
        {
            var childOrdinal = childAffix.ToCharArray().Last();

            // If the ID is one higher than the barycentre than this is the "first" child body
            var lowChild = childScan.BodyID - barycentre.BodyID == 1;

            string baryAffix;
                
            // Barycentre ordinal always labelled as low before high, e.g. "AB"
            if (lowChild)
            {
                baryAffix = childAffix + "-" + IncrementOrdinal(childAffix);
            }
            else
            {
                baryAffix = DecrementOrdinal(childAffix) + "-" + childAffix;
            }

            baryName = barycentre.StarSystem + " " + baryAffix;
        }
        else
        {
            // Without ordinals it's complicated to determine what the ordinal *should* be.
            // Just name the barycentre after the child object.
            baryName = childScan.BodyName + " Barycentre";
        }

        Scan barycentreScan = new()
        {
            Timestamp = barycentre.Timestamp,
            BodyName = baryName,
            Parents = childScan.Parents.RemoveAt(0),
            PlanetClass = "Barycentre",
            StarSystem = barycentre.StarSystem,
            SystemAddress = barycentre.SystemAddress,
            BodyID = barycentre.BodyID,
            SemiMajorAxis = barycentre.SemiMajorAxis,
            Eccentricity = barycentre.Eccentricity,
            OrbitalInclination = barycentre.OrbitalInclination,
            Periapsis = barycentre.Periapsis,
            OrbitalPeriod = barycentre.OrbitalPeriod,
            AscendingNode = barycentre.AscendingNode,
            MeanAnomaly = barycentre.MeanAnomaly,
            Json = barycentre.Json
        };

        return barycentreScan;
    }
    public void SetSystem(string potentialNewSystem)
    {
        if (string.IsNullOrEmpty(currentSystem) || currentSystem != potentialNewSystem)
        {
            currentSystem = potentialNewSystem;
            if (ExplorerWorker.settings.OnlyShowCurrentSystem && !ObservatoryCore.IsLogMonitorBatchReading)
            {
                ObservatoryCore.SetGridItems(ExplorerWorker, [
                    typeof(ExplorerUIResults).GetProperties(BindingFlags.Public | BindingFlags.Instance)
                        .Select(p => p.Name)
                        .ToDictionary(p => p, p => string.Empty)
                ]);
                Clear();
            }
        }
    }

    public void ProcessScan(Scan scanEvent, bool readAll)
    {
        if (!readAll)
        {
                
            // if (File.Exists(criteriaFilePath))
            // {
            //     var fileModified = new FileInfo(criteriaFilePath).LastWriteTime;
            //
            //     if (fileModified != CriteriaLastModified)
            //     {
            //         try
            //         {
            //             CustomCriteriaManager.RefreshCriteria(criteriaFilePath);
            //         }
            //         catch (CriteriaLoadException e)
            //         {
            //             var exceptionResult = new ExplorerUIResults
            //             {
            //                 BodyName = "Error Reading Custom Criteria File",
            //                 Time = DateTime.Now.ToString("G"),
            //                 Description = e.Message,
            //                 Details = e.OriginalScript
            //             };
            //             ObservatoryCore.AddGridItem(ExplorerWorker, exceptionResult);
            //         }
            //             
            //         CriteriaLastModified = fileModified;
            //     }
            // }
        }

        Dictionary<int, Scan> systemBodies;
        if (SystemBodyHistory.ContainsKey(scanEvent.SystemAddress))
        {
            systemBodies = SystemBodyHistory[scanEvent.SystemAddress];
            if (systemBodies.ContainsKey(scanEvent.BodyID))
            {
                if (scanEvent.SystemAddress != 0)
                {
                    //We've already checked this object.
                    return;
                }
            }
        }
        else
        {
            systemBodies = new();
            SystemBodyHistory.Add(scanEvent.SystemAddress, systemBodies);
        }

        if (SystemBodyHistory.Count > 1000)
        {
            foreach (var entry in SystemBodyHistory.Where(entry => entry.Key != scanEvent.SystemAddress).ToList())
            {
                SystemBodyHistory.Remove(entry.Key);
            }
            SystemBodyHistory.TrimExcess();
        }

        if (scanEvent.SystemAddress != 0 && !systemBodies.ContainsKey(scanEvent.BodyID))
            systemBodies.Add(scanEvent.BodyID, scanEvent);

        var results = DefaultCriteria.CheckInterest(scanEvent, SystemBodyHistory, BodySignalHistory, ExplorerWorker.settings);

        if (BarycentreHistory.ContainsKey(scanEvent.SystemAddress) && scanEvent.Parent != null && BarycentreHistory[scanEvent.SystemAddress].ContainsKey(scanEvent.Parent[0].Body))
        {
            ProcessScan(ConvertBarycentre(BarycentreHistory[scanEvent.SystemAddress][scanEvent.Parent[0].Body], scanEvent), readAll);
        }
        
        // if (ExplorerWorker.settings.EnableCustomCriteria)
        //     results.AddRange(CustomCriteriaManager.CheckInterest(scanEvent, SystemBodyHistory, BodySignalHistory, ExplorerWorker.settings));

        if (results.Count > 0)
        {
            StringBuilder notificationDetail = new();
            StringBuilder notificationExtendedDetail = new();
            foreach (var result in results)
            {
                var scanResult = new ExplorerUIResults
                {
                    BodyName = result.SystemWide ? scanEvent.StarSystem : scanEvent.BodyName,
                    Time = scanEvent.TimestampDateTime.ToString("G"),
                    Description = result.Description,
                    Details = result.Detail
                };
                ObservatoryCore.AddGridItem(ExplorerWorker, scanResult);
                notificationDetail.AppendLine(result.Description);
                notificationExtendedDetail.AppendLine(result.Detail);
            }

            string bodyAffix;

            if (scanEvent.StarSystem != null && scanEvent.BodyName.StartsWith(scanEvent.StarSystem))
            {
                bodyAffix = scanEvent.BodyName.Replace(scanEvent.StarSystem, string.Empty);
            }
            else
            {
                bodyAffix = string.Empty;
            }

            var bodyLabel = SecurityElement.Escape(scanEvent.PlanetClass == "Barycentre" ? "Barycentre" : "Body");

            string spokenAffix;

            if (bodyAffix.Length > 0)
            {
                if (bodyAffix.Contains("Ring"))
                {
                    var ringIndex = bodyAffix.Length - 6;
                    // spokenAffix =
                    //     "<say-as interpret-as=\"spell-out\">" + bodyAffix[..ringIndex]
                    //     + "</say-as><break strength=\"weak\"/>" + SplitOrdinalForSsml(bodyAffix.Substring(ringIndex, 1))
                    //     + bodyAffix[(ringIndex + 1)..];
                }
                else
                {
                    //spokenAffix = SplitOrdinalForSsml(bodyAffix);
                }
            }
            else
            {
                bodyLabel = "Primary Star";
                spokenAffix = string.Empty;
            }

            throw new NotImplementedException("Scan Complete Notification Not Implemented");
            // NotificationArgs args = new()
            // {
            //     Title = bodyLabel + bodyAffix,
            //     TitleSsml = $"<speak version=\"1.0\" xmlns=\"http://www.w3.org/2001/10/synthesis\" xml:lang=\"en-US\"><voice name=\"\">{bodyLabel} {spokenAffix}</voice></speak>",
            //     Detail = notificationDetail.ToString(),
            //     Sender = ExplorerWorker.ShortName,
            //     ExtendedDetails = notificationExtendedDetail.ToString(),
            //     CoalescingId = scanEvent.BodyID,
            // };
            //
            // ObservatoryCore.SendNotification(args);
        }
    }
}