using Avalonia.Collections;
using Avalonia.Controls;
using OxyPlot;
using OxyPlot.Series;
using Shaker.Models;
using ShakerApp.Tools;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text;

namespace ShakerApp.ViewModels
{
    public abstract class BaseDataReviewItemViewModel:DisplayViewModelBase<IModel>,IDataReviewItem
    {
        public BaseDataReviewItemViewModel()
        {
            TimeDomainReview = new TimeDomainReviewViewModel(this);
            THDReview = new THDReviewViewModel(this);
            ButtonVisibily = false;
        }
        private protected ShakerConfigModel ShakerConfig = new ShakerConfigModel();
        private protected ShakerControlModel ShakerControl = new ShakerControlModel();
        private protected DeviceInfoModel DeviceInfo = new DeviceInfoModel();
        private protected bool isopen = false;
        public bool IsOpen => isopen;
        public abstract MainPageType PageType { get; }
        public string File { get; } = string.Empty;
        [AllowNull]
        private protected TDMS.ITDMSFile tdmsfile;
        [AllowNull]
        public TimeDomainReviewViewModel TimeDomainReview { get; }
        [AllowNull]
        public THDReviewViewModel THDReview { get; }
        public virtual void OpenFile(string path) 
        {
            tdmsfile?.Close();
            tdmsfile?.Dispose();
            tdmsfile = TDMS.TDMSDataBuilder.OpenExisting(path);
            isopen = true;
            InitConfig();
        }
        public virtual void InitData(TDMS.ITDMSFile file)
        {
            tdmsfile?.Close();
            tdmsfile?.Dispose();
            tdmsfile = file;
            isopen = true;
            InitConfig();
        }
        private protected virtual void InitConfig()
        {
            if (tdmsfile == null) return;
            var group = tdmsfile.Contains(nameof(ShakerConfigModel)) ? tdmsfile[nameof(ShakerConfigModel)] : null;
            if (group == null) return;
            GetConfig(ShakerConfig, group!);
            group = tdmsfile.Contains(nameof(ShakerControlModel)) ? tdmsfile[nameof(ShakerControlModel)] : null;
            if (group == null) return;
            GetConfig(ShakerControl, group!);
            group = tdmsfile.Contains(nameof(DeviceInfoModel)) ? tdmsfile[nameof(DeviceInfoModel)] : null;
            if (group == null) return;
            GetConfig(DeviceInfo, group!);
            TimeDomainReview.InitData();
            THDReview.InitData();
            InitData();
        }

        private protected void GetConfig<T>(T config,TDMS.ITDMSChannelGroup group)
        {
            typeof(T).GetFields(System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public)
                .ToList()
                .ForEach(x =>
                {
                    if (x.FieldType.IsAssignableTo(typeof(IList)) || x.FieldType.IsArray)
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val))
                        {
                            byte[] bytes = new byte[val.Length / 2];
                            for (int i = 0; i < bytes.Length; i++)
                            {
                                bytes[i] = System.Convert.ToByte(val.Substring(i * 2, 2), 16);
                            }
                            x.SetValue(config,ShakerApp.Tools.Tools.Deserialize(x.FieldType, bytes));
                        }
                        else
                        {
                            x.SetValue(config,Activator.CreateInstance(x.FieldType));
                        }
                    }
                    else if(x.FieldType == typeof(string))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val))
                        {
                            x.SetValue(config,val);
                        }
                        else
                        {
                            x.SetValue(config,string.Empty);
                        }
                    }
                    else if (x.FieldType.IsEnum)
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val))
                        {
                            x.SetValue(config,Enum.Parse(x.FieldType, val));
                        }
                        else
                        {
                            x.SetValue(config,Enum.GetValues(x.FieldType));
                        }
                    }
                    else if (x.FieldType == typeof(byte))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && byte.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(byte)0);
                        }
                    }
                    else if (x.FieldType == typeof(sbyte))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && sbyte.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(sbyte)0);
                        }
                    }
                    else if (x.FieldType == typeof(short))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && short.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(short)0);
                        }
                    }
                    else if (x.FieldType == typeof(ushort))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && ushort.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(ushort)0);
                        }
                    }
                    else if (x.FieldType == typeof(int))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && int.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(int)0);
                        }
                    }
                    else if (x.FieldType == typeof(uint))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && uint.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(uint)0);
                        }
                    }
                    else if (x.FieldType == typeof(long))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && long.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(long)0);
                        }
                    }
                    else if (x.FieldType == typeof(ulong))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && ulong.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(ulong)0);
                        }
                    }
                    else if (x.FieldType == typeof(float))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && float.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(float)0);
                        }
                    }
                    else if (x.FieldType == typeof(double))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && double.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,(double)0);
                        }
                    }
                    else if (x.FieldType == typeof(bool))
                    {
                        if (group.TryGetProperty<string>(x.Name, out var val) && !string.IsNullOrEmpty(val) && bool.TryParse(val, out var b))
                        {
                            x.SetValue(config,b);
                        }
                        else
                        {
                            x.SetValue(config,false);
                        }
                    }
                });
        }
        public virtual void CloseFile() 
        {
            tdmsfile?.Close();
            tdmsfile?.Dispose();
            tdmsfile = null;
        }



        public class TimeDomainReviewViewModel : DisplayViewModelBase<IModel>
        {
            private bool isinint = false;
            List<OxyPlot.Series.LineSeries> _LineSeries = new List<OxyPlot.Series.LineSeries>();
            public OxyPlot.PlotModel PlotModel { get; } = new OxyPlot.PlotModel();
            private BaseDataReviewItemViewModel _Parent;
            public uint SampleRate { get => sampleRate; set =>SetProperty(ref sampleRate , value); }
            public uint TotalPages
            {
                get => Math.Clamp(totalPages, 1, uint.MaxValue);
                set
                {
                    SetProperty(ref totalPages, value);
                    OnPropertyChanged(nameof(MaxPageIndex));
                    OnPropertyChanged(nameof(MaxReadPages));
                    OnPropertyChanged(nameof(PageIndex));
                    OnPropertyChanged(nameof(ReadPages));
                }
            }
            public uint PageIndex 
            { 
                get =>Math.Clamp(pageIndex,MinPageIndex,MaxPageIndex);
                set
                {
                    SetProperty(ref pageIndex, value);
                    OnPropertyChanged(nameof(MaxReadPages));
                    OnPropertyChanged(nameof(ReadPages));
                    LoadData();
                }
            }
            public uint MinPageIndex => 1;
            public uint MaxPageIndex => TotalPages;
            public uint ReadPages 
            {
                get =>Math.Clamp(readPages,MinReadPages,MaxReadPages);
                set
                {
                    SetProperty(ref readPages, value);
                    LoadData();
                }
            }
            public uint MinReadPages => 1;
            public uint MaxReadPages => Math.Clamp(TotalPages - PageIndex + 1, 1, 10000);
            public TimeDomainReviewViewModel(BaseDataReviewItemViewModel parent)
            {
                _Parent = parent;
                PlotModel.Axes.Add(new OxyPlot.Axes.LinearAxis()
                {
                    MajorGridlineStyle = OxyPlot.LineStyle.Solid,
                    Position = OxyPlot.Axes.AxisPosition.Bottom,
                    Key = "X",
                    Title = App.Current?.FindResource("Time") +"",
                    Unit = "s",
                    MinimumPadding = 0,
                    MaximumPadding = 0,
                });
                PlotModel.Axes.Add(new OxyPlot.Axes.LinearAxis()
                {
                    MajorGridlineStyle = OxyPlot.LineStyle.Solid,
                    Position = OxyPlot.Axes.AxisPosition.Left,
                    Key = "Y",
                    Title = App.Current?.FindResource("")+"",
                    MinimumPadding = 0,
                    MaximumPadding = 0,
                });
                PlotModel.Legends.Add(new OxyPlot.Legends.Legend()
                {
                    IsLegendVisible = true,
                });
            }
            private TDMS.ITDMSChannelGroup? _DataGroup;
            private List<TDMS.ITDMSChannel> _Channels = new List<TDMS.ITDMSChannel>();
            private uint readPages;
            private uint pageIndex;
            private uint totalPages;
            private uint sampleRate;

            public override void InitData()
            {
                isinint = false;
                base.InitData();
                _DataGroup = _Parent.tdmsfile.Contains(BaseMainPageViewModel<IModel>.TimeDomainData) ? _Parent.tdmsfile[BaseMainPageViewModel<IModel>.TimeDomainData] : null;
                if (_DataGroup == null)
                {
                    DataReviewViewModel.Instance.ShowError(App.Current?.FindResource("TestFileReadError")+"");
                    return;
                }
                _Channels.Clear();
                _LineSeries.Clear();
                PlotModel.Series.Clear();
                if(_DataGroup.ChildCount ==0)
                {
                    DataReviewViewModel.Instance.ShowError(App.Current?.FindResource("TestFileReadError") + "");
                    return;
                }
                PlotModel.InvalidatePlot(false);
                for(ulong i=0;i<_DataGroup.ChildCount;i++)
                {
                    _Channels.Add(_DataGroup[(int)i]!);
                    _LineSeries.Add(new OxyPlot.Series.LineSeries()
                    {
                        XAxisKey = "X",
                        YAxisKey = "Y",
                        DataFieldX = nameof(OxyPlot.DataPoint.X),
                        DataFieldY = nameof(OxyPlot.DataPoint.Y),
                        Title = App.Current?.FindResource(_Channels[^1].Name)+"",
                        Tag = _Channels[^1].Unit,
                    });
                    PlotModel.Series.Add(_LineSeries[^1]);
                }
                PlotModel.InvalidatePlot(true);
                SampleRate = _Parent.ShakerConfig.SampleRate;
                TotalPages = (uint)Math.Ceiling(_Channels[0].ChildCount / (double)SampleRate);
                ReadPages = 1;
                PageIndex = 1;
                isinint = true;
                LoadData();
            }

            private void LoadData()
            {
                if (!isinint) return;
                uint start = (PageIndex - 1) * SampleRate;
                uint len = ReadPages * SampleRate;
                len = (uint)Math.Clamp(len, len, _Channels[^1].ChildCount - start);
                double pro = 1d / SampleRate;
                //var datas = Enumerable.Repeat(new OxyPlot.DataPoint(), 1000_000).ToList();
                PlotModel.InvalidatePlot(false);
                
                for(int i=0;i<_Channels.Count;i++)
                {
                    uint index = 0;
                    _LineSeries[i].ItemsSource = _Channels[i].GetDataValues<double>(start, len).Select(x =>
                    {
                        return new OxyPlot.DataPoint((index++) * pro, x);
                    }).ToList();
                    // _LineSeries[i].ItemsSource = datas;
                }
                PlotModel.InvalidatePlot(true);
            }
        }


        public class THDReviewViewModel:DisplayViewModelBase<IModel>
        {
            private int[] indexLenght = new int[0];
            private List<TDMS.ITDMSChannel> channels = new List<TDMS.ITDMSChannel>();
            [AllowNull]
            TDMS.ITDMSChannel freqchannel;
            ulong datalen = 0;
            public uint MaxFrame => 10000;
            public uint Current 
            { 
                get => current;
                set
                {
                    SetProperty(ref current, value);
                    LoadData();
                }
            }
            public AvaloniaList<uint> Frames { get; } = new AvaloniaList<uint>();

            public bool IsFixed { get => isFixed; set =>SetProperty(ref isFixed  ,value); }
            BaseDataReviewItemViewModel _parent;
            TDMS.ITDMSChannelGroup? _Group;
            private uint current = 1;
            private bool isFixed = true;
            public override string Title => IsFixed ? "SweepCount" : "THD";

            public THDReviewViewModel(BaseDataReviewItemViewModel parent)
            {
                _parent = parent;
                PlotModel.Axes.Add(new OxyPlot.Axes.LinearAxis()
                {
                    Position = OxyPlot.Axes.AxisPosition.Bottom,
                    MajorGridlineStyle = OxyPlot.LineStyle.Solid,
                    Key="X",
                    Title = App.Current?.FindResource("FrameXTitle")+ "",
                });
                PlotModel.Axes.Add(new OxyPlot.Axes.LinearAxis()
                {
                    Position = OxyPlot.Axes.AxisPosition.Left,
                    MajorGridlineStyle = OxyPlot.LineStyle.Solid,
                    Title="THD",
                    Unit ="%",
                    Key ="Y",
                });
                PlotModel.Legends.Add(new OxyPlot.Legends.Legend()
                {
                    IsLegendVisible = true,
                });
            }
            public override void InitData()
            {
                base.InitData();
                if(_parent.PageType == MainPageType.SinePage && _parent is SineDataReviewViewModel sine)
                {
                    if(sine.SweepConfig.SignalType == SignalType.Fixed)
                    {
                        PlotModel.Axes[0].Title = App.Current?.FindResource("FrameXTitle") + "";
                        PlotModel.Axes[0].Unit = "";
                    }
                    else
                    {
                        PlotModel.Axes[0].Title = App.Current?.FindResource("Frequency") + "";
                        PlotModel.Axes[0].Unit = "Hz";
                    }
                    IsFixed = sine.SweepConfig.SignalType == SignalType.Fixed;
                    OnPropertyChanged(nameof(Title));
                }

                channels.Clear();
                PlotModel.Series.Clear();
                _Group = _parent.tdmsfile.Contains(BaseMainPageViewModel<IModel>.THDData) ? _parent.tdmsfile[BaseMainPageViewModel<IModel>.THDData] : null;
                
                if(IsEnabled && _Group!=null)
                {
                    for(int i=0; i < (int)_Group.ChildCount;i++)
                    {
                        var ch = _Group[i];
                        if (ch == null || !ShakerDataViewModel.Instance.AllowTHDChannels.Contains(ch.Name)) continue;
                        channels.Add(ch);
                        PlotModel.Series.Add(new OxyPlot.Series.LineSeries()
                        {
                            XAxisKey = "X",
                            YAxisKey = "Y",
                            DataFieldX = nameof(DataPoint.X),
                            DataFieldY = nameof(DataPoint.Y),
                            Title = App.Current?.FindResource(ch.Name)+"",
                        });
                    }
                    freqchannel = _Group.Contains(nameof(SweepData.Frequency)) ? _Group[nameof(SweepData.Frequency)] : null;
                    var sweepindexchannel = _Group.Contains(nameof(SineMainPageViewModel.SweepIndex)) ? _Group[nameof(SineMainPageViewModel.SweepIndex)] : null;
                    if(sweepindexchannel!=null)
                    {
                        var max = sweepindexchannel.GetDataValues<int>((uint)sweepindexchannel.ChildCount-1, 1)[0];

                        indexLenght = new int[max+1];
                        int index = 0;
                        for(int i=0;i<max+1;i++)
                        {
                            while (true)
                            {
                                uint readlen = Math.Min(MaxFrame, (uint)(sweepindexchannel.ChildCount - (uint)index));
                                if (readlen == 0) break;
                                var temp = sweepindexchannel.GetDataValues<int>((uint)index, readlen);
                                int c = temp.Count(x => x == i);
                                indexLenght[i] += c;
                                if (c == readlen)
                                {
                                    index += (int)readlen;
                                    continue;
                                }
                                else
                                {
                                    if (temp[^1]!=i)
                                    {
                                        index += c;
                                        break;
                                    }
                                }
                            }
                        }

                        Frames.Clear();
                        Frames.AddRange(Enumerable.Range(1, max+1).Select(x => (uint)x).ToList());
                    }
                    else
                    {
                        indexLenght = new int[0];
                        var total = (int)Math.Ceiling(datalen / (float)MaxFrame);
                        Frames.Clear();
                        Frames.AddRange(Enumerable.Range(1, total).Select(x => (uint)x).ToList());
                    }
                    datalen = channels.Min(x => x.ChildCount);
                    Current = 1;
                }
                else
                {
                    PlotModel.InvalidatePlot(false);
                    PlotModel.InvalidatePlot(true);
                }
                OnPropertyChanged(nameof(Frames));
                OnPropertyChanged(nameof(IsEnabled));
            }
            private void LoadData()
            {
                if (datalen == 0) return;
                if (_parent is not SineDataReviewViewModel sine) return;
                uint start = (Current - 1) * MaxFrame;
                uint len = (uint)Math.Min(datalen - (ulong)start, (ulong)MaxFrame);
                PlotModel.InvalidatePlot(false);
                if(freqchannel==null || sine.SweepConfig.SignalType == SignalType.Fixed)
                {
                    for (int i = 0; i < channels.Count; i++)
                    {
                        int index = 0;
                        (PlotModel.Series[i] as LineSeries)!.ItemsSource = channels[i].GetDataValues<float>(start, len).Select(x =>
                        {
                            return new DataPoint(index++, x * 100);
                        }).ToList();
                    }
                }
                else
                {
                    start = 0;
                    var indexindex = Frames.ToList().FindIndex(x => x == Current);
                    if(indexindex>0)
                    {
                        start = (uint)indexLenght.Skip(indexindex).Sum();
                    }
                    len = (uint)indexLenght[indexindex];
                    var freq = freqchannel.GetDataValues<double>(start, len);
                    for (int i = 0; i < channels.Count; i++)
                    {
                        int index = 0;
                        (PlotModel.Series[i] as LineSeries)!.ItemsSource = channels[i].GetDataValues<float>(start, len).Select(x =>
                        {
                            return new DataPoint(freq[index++], x * 100);
                        }).ToList();
                    }
                }
                PlotModel.InvalidatePlot(true);
            }
            public OxyPlot.PlotModel PlotModel { get; } = new OxyPlot.PlotModel();
            public bool IsEnabled => _Group != null && _Group.ChildCount > 0;
        }
    }
}