using System;
using System.Diagnostics;
using System.Windows.Forms.DataVisualization.Charting;

namespace GHelper
{
    public partial class Fans : Form
    {

        DataPoint curPoint = null;
        Series seriesCPU;
        Series seriesGPU;

        const int MaxTotal = 150;
        const int MinTotal = 15;
        const int DefaultTotal = 125;

        const int MaxCPU = 90;
        const int MinCPU = 15;
        const int DefaultCPU = 80;

        void SetChart(Chart chart, int device)
        {

            string title;

            if (device == 1)
                title = "GPU Fan Profile";
            else
                title = "CPU Fan Profile";

            if (Program.settingsForm.perfName.Length > 0)
                title += ": " + Program.settingsForm.perfName;

            if (chart.Titles.Count > 0)
                chart.Titles[0].Text = title;
            else
                chart.Titles.Add(title);

            chart.ChartAreas[0].AxisX.MajorGrid.LineColor = Color.LightGray;
            chart.ChartAreas[0].AxisY.MajorGrid.LineColor = Color.LightGray;

            chart.ChartAreas[0].AxisX.Minimum = 10;
            chart.ChartAreas[0].AxisX.Maximum = 100;
            chart.ChartAreas[0].AxisX.Interval = 10;

            chart.ChartAreas[0].AxisY.Minimum = 0;
            chart.ChartAreas[0].AxisY.Maximum = 100;

            chart.ChartAreas[0].AxisY.LabelStyle.Font = new Font("Arial", 7F);

            chart.ChartAreas[0].AxisY.CustomLabels.Add(-2, 2, "OFF");

            for (int i = 1; i <= 9; i++)
                chart.ChartAreas[0].AxisY.CustomLabels.Add(i * 10 - 2, i * 10 + 2, (1800 + 400 * i).ToString());

            chart.ChartAreas[0].AxisY.CustomLabels.Add(98, 102, "RPM");

            chart.ChartAreas[0].AxisY.Interval = 10;

            if (chart.Legends.Count > 0)
                chart.Legends[0].Enabled = false;

        }

        private void Fans_Shown(object? sender, EventArgs e)
        {
            Top = Program.settingsForm.Top;
            Left = Program.settingsForm.Left - Width - 5;
        }

        public Fans()
        {

            InitializeComponent();

            FormClosing += Fans_FormClosing;

            seriesCPU = chartCPU.Series.Add("CPU");
            seriesGPU = chartGPU.Series.Add("GPU");

            seriesCPU.Color = Color.Blue;
            seriesGPU.Color = Color.Red;

            chartCPU.MouseMove += ChartCPU_MouseMove;
            chartCPU.MouseUp += ChartCPU_MouseUp;

            chartGPU.MouseMove += ChartCPU_MouseMove;
            chartGPU.MouseUp += ChartCPU_MouseUp;

            buttonReset.Click += ButtonReset_Click;
            buttonApply.Click += ButtonApply_Click;

            trackTotal.Maximum = MaxTotal;
            trackTotal.Minimum = MinTotal;

            trackCPU.Maximum = MaxCPU;
            trackCPU.Minimum = MinCPU;

            trackCPU.Scroll += TrackCPU_Scroll;
            trackTotal.Scroll += TrackTotal_Scroll;

            buttonApplyPower.Click += ButtonApplyPower_Click;

            checkAuto.Click += CheckAuto_Click;

            //labelInfo.MaximumSize = new Size(280, 0);
            labelInfo.Text = "Power Limits (PPT) is\nexperimental feature.\n\nValues will be applied\nonly after you click 'Apply'\nand reset after performance\nmode changes.\n\nUse carefully and\non your own risk!";

            LoadFans();
            VisualisePower(true);

            Shown += Fans_Shown;

        }

        private void CheckAuto_Click(object? sender, EventArgs e)
        {
            if (sender is null)
                return;

            CheckBox chk = (CheckBox)sender;

            Program.config.setConfig("auto_apply_" + Program.config.getConfig("performance_mode"), chk.Checked ? 1 : 0);
        }

        private void Fans_FormClosing(object? sender, FormClosingEventArgs e)
        {
            if (e.CloseReason == CloseReason.UserClosing)
            {
                e.Cancel = true;
                Hide();
            }
        }

        private void ButtonApplyPower_Click(object? sender, EventArgs e)
        {
            int limit_total = trackTotal.Value;
            int limit_cpu = trackCPU.Value;

            Program.config.setConfig("limit_total", limit_total);
            Program.config.setConfig("limit_cpu", limit_cpu);

            Program.wmi.DeviceSet(ASUSWmi.PPT_TotalA0, limit_total);
            Program.wmi.DeviceSet(ASUSWmi.PPT_TotalA1, limit_total);

            Program.wmi.DeviceSet(ASUSWmi.PPT_CPUB0, limit_cpu);
            Program.wmi.DeviceSet(ASUSWmi.PPT_CPUA2, limit_cpu);

            labelApplied.ForeColor = Color.Blue;
            labelApplied.Text = "Applied";

        }

        public void VisualisePower(bool init = false)
        {

            int limit_total;
            int limit_cpu;

            if (init)
            {
                limit_total = Program.config.getConfig("limit_total");
                limit_cpu = Program.config.getConfig("limit_cpu");
            }
            else
            {
                limit_total = trackTotal.Value;
                limit_cpu = trackCPU.Value;
            }

            if (limit_total < 0) limit_total = DefaultTotal;
            if (limit_total > MaxTotal) limit_total = MaxTotal;
            if (limit_total < MinTotal) limit_total = MinTotal;

            if (limit_cpu < 0) limit_cpu = DefaultCPU;
            if (limit_cpu > MaxCPU) limit_cpu = MaxCPU;
            if (limit_cpu < MinCPU) limit_cpu = MinCPU;

            if (limit_cpu > limit_total) limit_cpu = limit_total;

            trackTotal.Value = limit_total;
            trackCPU.Value = limit_cpu;

            labelTotal.Text = trackTotal.Value.ToString() + "W";
            labelCPU.Text = trackCPU.Value.ToString() + "W";

            pictureFine.Visible = (limit_cpu > 85 || limit_total > 145);
        }

        private void TrackTotal_Scroll(object? sender, EventArgs e)
        {
            VisualisePower();
        }

        private void TrackCPU_Scroll(object? sender, EventArgs e)
        {
            VisualisePower();
        }

        public void ResetApplyLabel()
        {
            labelApplied.ForeColor = Color.Red;
            labelApplied.Text = "Not Applied";
        }

        public void LoadFans()
        {

            SetChart(chartCPU, 0);
            SetChart(chartGPU, 1);

            LoadProfile(seriesCPU, 0);
            LoadProfile(seriesGPU, 1);

            int auto_apply = Program.config.getConfig("auto_apply_" + Program.config.getConfig("performance_mode"));

            checkAuto.Checked = (auto_apply == 1);

        }


        void LoadProfile(Series series, int device, int def = 0)
        {

            series.ChartType = SeriesChartType.Line;
            series.MarkerSize = 10;
            series.MarkerStyle = MarkerStyle.Circle;

            series.Points.Clear();

            int mode = Program.config.getConfig("performance_mode");
            byte[] curve = Program.config.getFanConfig(device);

            if (def == 1 || curve.Length != 16)
                curve = Program.wmi.GetFanCurve(device, mode);

            if (curve.Length != 16 || curve.All(singleByte => singleByte == 0))
                curve = Program.config.getDefaultCurve(device);

            //Debug.WriteLine(BitConverter.ToString(curve));

            byte old = 0;
            for (int i = 0; i < 8; i++)
            {
                if (curve[i] == old) curve[i]++; // preventing 2 points in same spot from default asus profiles
                series.Points.AddXY(curve[i], curve[i + 8]);
                old = curve[i];
            }

        }

        void ApplyProfile(Series series, int device)
        {
            byte[] curve = new byte[16];
            int i = 0;
            foreach (DataPoint point in series.Points)
            {
                curve[i] = (byte)point.XValue;
                curve[i + 8] = (byte)point.YValues.First();
                i++;
            }

            Program.config.setFanConfig(device, curve);
            Program.wmi.SetFanCurve(device, curve);

        }


        private void ButtonApply_Click(object? sender, EventArgs e)
        {
            ApplyProfile(seriesCPU, 0);
            ApplyProfile(seriesGPU, 1);
        }

        private void ButtonReset_Click(object? sender, EventArgs e)
        {
            LoadProfile(seriesCPU, 0, 1);
            LoadProfile(seriesGPU, 1, 1);

            checkAuto.Checked = false;
            Program.config.setConfig("auto_apply_" + Program.config.getConfig("performance_mode"), 0);

            Program.wmi.DeviceSet(ASUSWmi.PerformanceMode, Program.config.getConfig("performance_mode"));

            ResetApplyLabel();
        }

        private void ChartCPU_MouseUp(object? sender, MouseEventArgs e)
        {
            curPoint = null;
        }

        private void ChartCPU_MouseMove(object? sender, MouseEventArgs e)
        {

            if (sender is null) return;

            Chart chart = (Chart)sender;

            if (e.Button.HasFlag(MouseButtons.Left))
            {
                ChartArea ca = chart.ChartAreas[0];
                Axis ax = ca.AxisX;
                Axis ay = ca.AxisY;

                HitTestResult hit = chart.HitTest(e.X, e.Y);
                if (hit.Series is not null && hit.PointIndex >= 0)
                    curPoint = hit.Series.Points[hit.PointIndex];


                if (curPoint != null)
                {

                    Series s = hit.Series;
                    double dx, dy, dymin;

                    try
                    {
                        dx = ax.PixelPositionToValue(e.X);
                        dy = ay.PixelPositionToValue(e.Y);

                        if (dx < 20) dx = 20;
                        if (dx > 100) dx = 100;

                        if (dy < 0) dy = 0;
                        if (dy > 100) dy = 100;

                        dymin = (dx - 60) * 1.2;

                        if (dy < dymin) dy = dymin;

                        curPoint.XValue = dx;
                        curPoint.YValues[0] = dy;

                    }
                    catch
                    {
                        Debug.WriteLine(e.Y);
                    }
                }
            }
        }
    }

}