using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using Newtonsoft.Json.Linq;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;

namespace YKC
{
    public partial class RealtimePage : Page
    {
        private Timer _pollTimer;
        private int _currentPile = 1;
        private int _currentGun = 1;

        public RealtimePage()
        {
            InitializeComponent();
            InitLinePlot(plotCurrent, OxyColor.Parse("#3B82F6"));
            InitLinePlot(plotVoltage, OxyColor.Parse("#8B5CF6"));
            InitLinePlot(plotPower, OxyColor.Parse("#F59E0B"));
            InitBarPlot(plotAmount);

            Loaded += (s, e) =>
            {
                Dispatcher.BeginInvoke(new Action(RefreshData),
                    System.Windows.Threading.DispatcherPriority.Background);
                _pollTimer = new Timer((_) =>
                    Dispatcher.BeginInvoke(new Action(RefreshData)), null, 2000, 2000);
            };
            Unloaded += (s, e) => _pollTimer?.Dispose();
        }

        private void InitLinePlot(OxyPlot.Wpf.PlotView pv, OxyColor color)
        {
            var model = new PlotModel { PlotAreaBorderColor = OxyColors.Transparent };
            model.Axes.Add(new DateTimeAxis
            {
                Position = AxisPosition.Bottom,
                TextColor = OxyColor.Parse("#94A3B8"),
                AxislineColor = OxyColor.Parse("#E2E8F0"),
                TicklineColor = OxyColor.Parse("#E2E8F0"),
                MajorGridlineColor = OxyColor.Parse("#F1F5F9"),
                StringFormat = "HH:mm:ss",
                FontSize = 10
            });
            model.Axes.Add(new LinearAxis
            {
                Position = AxisPosition.Left,
                TextColor = OxyColor.Parse("#94A3B8"),
                AxislineColor = OxyColors.Transparent,
                TicklineColor = OxyColors.Transparent,
                MajorGridlineStyle = LineStyle.Dash,
                MajorGridlineColor = OxyColor.Parse("#F1F5F9"),
                FontSize = 10,
                MinimumPadding = 0.1,
                MaximumPadding = 0.1
            });
            model.Series.Add(new LineSeries
            {
                Color = color,
                StrokeThickness = 2,
                MarkerType = MarkerType.None,
                CanTrackerInterpolatePoints = false
            });
            pv.Model = model;
        }

        private void InitBarPlot(OxyPlot.Wpf.PlotView pv)
        {
            var model = new PlotModel { PlotAreaBorderColor = OxyColors.Transparent };
            var catAxis = new CategoryAxis
            {
                Position = AxisPosition.Bottom,
                TextColor = OxyColor.Parse("#64748B"),
                FontSize = 12,
                AxislineColor = OxyColor.Parse("#E2E8F0"),
                TicklineColor = OxyColor.Parse("#E2E8F0")
            };
            catAxis.Labels.Add("服务费");
            catAxis.Labels.Add("电费");
            catAxis.Labels.Add("总金额");
            model.Axes.Add(catAxis);
            model.Axes.Add(new LinearAxis
            {
                Position = AxisPosition.Left,
                Title = "元",
                TextColor = OxyColor.Parse("#94A3B8"),
                FontSize = 10,
                AxislineColor = OxyColors.Transparent,
                TicklineColor = OxyColors.Transparent,
                MajorGridlineStyle = LineStyle.Dash,
                MajorGridlineColor = OxyColor.Parse("#F1F5F9"),
                MinimumPadding = 0,
                MaximumPadding = 0.15
            });
            model.Series.Add(new RectangleBarSeries { FillColor = OxyColor.Parse("#1E9FFF") });
            model.Series.Add(new RectangleBarSeries { FillColor = OxyColor.Parse("#10B981") });
            model.Series.Add(new RectangleBarSeries { FillColor = OxyColor.Parse("#6366F1") });
            pv.Model = model;
        }

        private void PileGun_Changed(object sender, SelectionChangedEventArgs e)
        {
            try
            {
                if (cmbPile == null || cmbGun == null) return;
                _currentPile = cmbPile.SelectedIndex + 1;
                _currentGun = cmbGun.SelectedIndex + 1;
                RefreshData();
            }
            catch { }
        }

        private void RefreshData()
        {
            try
            {
                if (txtCurrent == null || plotCurrent == null || plotCurrent.Model == null) return;
                var latest = PilesStoreHolder.Instance.GetLatest(_currentPile, _currentGun);
                if (latest == null) return;

                txtCurrent.Text = FormatValue(latest.Value<double?>("current")) + " A";
                txtVoltage.Text = FormatValue(latest.Value<double?>("voltage")) + " V";
                txtPower.Text = FormatValue(latest.Value<double?>("power")) + " kW";
                txtEnergy.Text = FormatValue(latest.Value<double?>("energy")) + " kWh";
                txtTotalAmount.Text = "¥ " + FormatValue(latest.Value<double?>("total_amount"));

                int? st = latest.Value<int?>("status");
                if (st == 0) { txtStatus.Text = "离线"; txtStatus.Foreground = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#909399")); }
                else if (st == 1) { txtStatus.Text = "故障"; txtStatus.Foreground = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#EF4444")); }
                else if (st == 2) { txtStatus.Text = "空闲"; txtStatus.Foreground = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#10B981")); }
                else if (st == 3) { txtStatus.Text = "充电中"; txtStatus.Foreground = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#3B82F6")); }
                else { txtStatus.Text = "--"; }

                txtOrderNo.Text = latest.Value<string>("order_no") ?? "--";
                txtSoc.Text = latest.Value<double?>("soc") != null ? latest.Value<double>("soc").ToString("F1") + "%" : "--";
                txtCumTime.Text = FormatMin(latest.Value<double?>("cumulative_time"));
                txtRemTime.Text = FormatMin(latest.Value<double?>("remaining_time"));

                UpdateCharts();
            }
            catch { }
        }

        private void UpdateCharts()
        {
            try
            {
                if (plotCurrent == null || plotCurrent.Model == null || plotCurrent.Model.Series.Count == 0) return;
                if (plotAmount == null || plotAmount.Model == null || plotAmount.Model.Series.Count == 0) return;

                var chartData = PilesStoreHolder.Instance.GetChartData(_currentPile, _currentGun);
                if (chartData == null || chartData.Count == 0) return;

                var curPoints = new List<DataPoint>();
                var volPoints = new List<DataPoint>();
                var powPoints = new List<DataPoint>();

                foreach (var item in chartData)
                {
                    long unixTs = item.Value<long>("t");
                    var dt = DateTimeOffset.FromUnixTimeSeconds(unixTs).DateTime;
                    double oxyTime = DateTimeAxis.ToDouble(dt);
                    curPoints.Add(new DataPoint(oxyTime, item.Value<double?>("current") ?? 0));
                    volPoints.Add(new DataPoint(oxyTime, item.Value<double?>("voltage") ?? 0));
                    powPoints.Add(new DataPoint(oxyTime, item.Value<double?>("power") ?? 0));
                }

                ((LineSeries)plotCurrent.Model.Series[0]).Points.Clear();
                ((LineSeries)plotCurrent.Model.Series[0]).Points.AddRange(curPoints);
                ((LineSeries)plotVoltage.Model.Series[0]).Points.Clear();
                ((LineSeries)plotVoltage.Model.Series[0]).Points.AddRange(volPoints);
                ((LineSeries)plotPower.Model.Series[0]).Points.Clear();
                ((LineSeries)plotPower.Model.Series[0]).Points.AddRange(powPoints);
                plotCurrent.InvalidatePlot(true);
                plotVoltage.InvalidatePlot(true);
                plotPower.InvalidatePlot(true);

                var latest = PilesStoreHolder.Instance.GetLatest(_currentPile, _currentGun);
                if (latest != null)
                {
                    double sf = latest.Value<double?>("service_fee") ?? 0;
                    double ef = latest.Value<double?>("electricity_fee") ?? 0;
                    double ta = latest.Value<double?>("total_amount") ?? 0;

                    ((RectangleBarSeries)plotAmount.Model.Series[0]).Items.Clear();
                    ((RectangleBarSeries)plotAmount.Model.Series[0]).Items.Add(new RectangleBarItem(-0.25, 0, 0.25, sf));
                    ((RectangleBarSeries)plotAmount.Model.Series[1]).Items.Clear();
                    ((RectangleBarSeries)plotAmount.Model.Series[1]).Items.Add(new RectangleBarItem(0.75, 0, 1.25, ef));
                    ((RectangleBarSeries)plotAmount.Model.Series[2]).Items.Clear();
                    ((RectangleBarSeries)plotAmount.Model.Series[2]).Items.Add(new RectangleBarItem(1.75, 0, 2.25, ta));
                    plotAmount.InvalidatePlot(true);
                }
            }
            catch { }
        }

        private string FormatValue(double? v)
        {
            return v.HasValue ? v.Value.ToString("F2") : "--";
        }

        private string FormatMin(double? v)
        {
            return v.HasValue ? Math.Round(v.Value).ToString() + " min" : "--";
        }
    }
}