using System;
using System.Drawing;
using System.Windows.Forms;
using FastReport.Utils;
using System.Drawing.Drawing2D;
using System.IO;

namespace FastReport.Forms
{
    internal partial class FillEditorForm : BaseDialogForm
    {
        private FillBase fill;
        private FillBase[] fills;
        private bool updating;

        private SolidFill SolidFill
        {
            get { return fills[0] as SolidFill; }
            set { fills[0] = value; }
        }

        private LinearGradientFill LinearGradientFill
        {
            get { return fills[1] as LinearGradientFill; }
            set { fills[1] = value; }
        }

        private PathGradientFill PathGradientFill
        {
            get { return fills[2] as PathGradientFill; }
            set { fills[2] = value; }
        }

        private HatchFill HatchFill
        {
            get { return fills[3] as HatchFill; }
            set { fills[3] = value; }
        }

        private GlassFill GlassFill
        {
            get { return fills[4] as GlassFill; }
            set { fills[4] = value; }
        }

        private TextureFill TextureFill
        {
            get { return fills[5] as TextureFill; }
            set { fills[5] = value; }
        }

        public FillBase Fill
        {
            get { return fill; }
            set
            {
                fill = value;
                UpdateControls();
            }
        }

        private void PopulateFills()
        {
            fills = new FillBase[] {
                new SolidFill(Color.Silver), new LinearGradientFill(), new PathGradientFill(),
                new HatchFill(), new GlassFill(), new TextureFill() };
            (fills[0] as SolidFill).Color = Color.Transparent;
        }

        private void UpdateControls()
        {
            if (fill is SolidFill)
            {
                SolidFill = fill as SolidFill;
                cbxSolidColor.Color = SolidFill.Color;
                pcPanels.ActivePageIndex = 0;
            }
            else if (fill is LinearGradientFill)
            {
                LinearGradientFill = fill as LinearGradientFill;
                cbxLinearStartColor.Color = LinearGradientFill.StartColor;
                cbxLinearEndColor.Color = LinearGradientFill.EndColor;
                trbLinearFocus.Value = (int)Math.Round(LinearGradientFill.Focus * 100);
                trbLinearContrast.Value = (int)Math.Round(LinearGradientFill.Contrast * 100);
                acLinearAngle.Angle = LinearGradientFill.Angle;
                pcPanels.ActivePageIndex = 1;
            }
            else if (fill is PathGradientFill)
            {
                PathGradientFill = fill as PathGradientFill;
                cbxPathCenterColor.Color = PathGradientFill.CenterColor;
                cbxPathEdgeColor.Color = PathGradientFill.EdgeColor;
                rbPathEllipse.Checked = PathGradientFill.Style == PathGradientStyle.Elliptic;
                rbPathRectangle.Checked = PathGradientFill.Style == PathGradientStyle.Rectangular;
                pcPanels.ActivePageIndex = 2;
            }
            else if (fill is HatchFill)
            {
                HatchFill = fill as HatchFill;
                cbxHatchForeColor.Color = HatchFill.ForeColor;
                cbxHatchBackColor.Color = HatchFill.BackColor;
                cbxHatch.Style = HatchFill.Style;
                pcPanels.ActivePageIndex = 3;
            }
            else if (fill is GlassFill)
            {
                GlassFill = fill as GlassFill;
                cbxGlassColor.Color = GlassFill.Color;
                trbGlassBlend.Value = (int)Math.Round(GlassFill.Blend * 100);
                cbGlassHatch.Checked = GlassFill.Hatch;
                pcPanels.ActivePageIndex = 4;
            }
            else if (fill is TextureFill)
            {
                TextureFill = fill as TextureFill;
                cbWrapMode.SelectedItem = TextureFill.WrapMode.ToString();
                numImgWidth.Value = TextureFill.ImageWidth;
                numImgHeight.Value = TextureFill.ImageHeight;
                chBxPreserveRatio.Checked = TextureFill.PreserveAspectRatio;
                numOffsetX.Value = TextureFill.ImageOffsetX;
                numOffsetY.Value = TextureFill.ImageOffsetY;
                pcPanels.ActivePageIndex = 5;
            }
        }

        public override void Localize()
        {
            base.Localize();
            MyRes res = new MyRes("Forms,Fill");
            Text = res.Get("");

            pnSolid.Text = res.Get("Solid");
            pnLinear.Text = res.Get("LinearGradient");
            pnPath.Text = res.Get("PathGradient");
            pnHatch.Text = res.Get("Hatch");
            pnGlass.Text = res.Get("Glass");
            pnTexture.Text = res.Get("Texture");
            lblWrapMode.Text = res.Get("WrapMode");

            btnOpenFileDialog.Text = res.Get("ChooseImage");
            gpImageSize.Text = res.Get("ImageSize");
            lblImgWidth.Text = res.Get("ImageWidth");
            lblImgHeight.Text = res.Get("ImageHeight");
            chBxPreserveRatio.Text = res.Get("PreserveAspectRatio");
            gbOffset.Text = res.Get("ImageOffset");
            gbSolidColors.Text = res.Get("Color");
            lblSolidColor.Text = res.Get("Color");
            gbLinearColors.Text = res.Get("Colors");
            lblLinearStartColor.Text = res.Get("StartColor");
            lblLinearEndColor.Text = res.Get("EndColor");
            gbLinearOptions.Text = res.Get("Options");
            lblLinearFocus.Text = res.Get("Focus");
            lblLinearContrast.Text = res.Get("Contrast");
            gbLinearAngle.Text = res.Get("Angle");
            gbPathColors.Text = res.Get("Colors");
            lblPathCenterColor.Text = res.Get("CenterColor");
            lblPathEdgeColor.Text = res.Get("EdgeColor");
            gbPathShape.Text = res.Get("Shape");
            rbPathEllipse.Text = res.Get("Ellipse");
            rbPathRectangle.Text = res.Get("Rectangle");
            gbHatchColors.Text = res.Get("Colors");
            lblHatchForeColor.Text = res.Get("ForeColor");
            lblHatchBackColor.Text = res.Get("BackColor");
            gbHatchStyle.Text = res.Get("Style");
            gbGlassOptions.Text = res.Get("Options");
            lblGlassColor.Text = res.Get("Color");
            lblGlassBlend.Text = res.Get("Blend");
            cbGlassHatch.Text = res.Get("GlassHatch");
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            btnOpenFileDialog.Image = GetImage(1);
            cbxHatch.ItemHeight = this.LogicalToDevice(26);
        }

        private void pcPanels_PageSelected(object sender, EventArgs e)
        {
            if (updating)
                return;

            updating = true;
            int currentFill = pcPanels.ActivePageIndex;
            Fill = fills[currentFill];
            pnSample.Refresh();
            updating = false;
        }

        private void pnSample_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            if (Fill is TextureFill)
            {
                (Fill as TextureFill).Draw(new FRPaintEventArgs(g, 1, 1, null),
                  new RectangleF(0, 0, pnSample.Width, pnSample.Height));
            }
            if (Fill is GlassFill)
            {
                (Fill as GlassFill).Draw(new FRPaintEventArgs(g, 1, 1, null),
                  new RectangleF(0, 0, pnSample.Width, pnSample.Height));
            }
            else if (Fill != null)
            {
                Brush brush = null;

                if (Fill is SolidFill && Fill.IsTransparent)
                    brush = new HatchBrush(HatchStyle.LargeCheckerBoard, Color.White, Color.Gainsboro);
                else
                    brush = Fill.CreateBrush(new RectangleF(0, 0, pnSample.Width, pnSample.Height));

                g.FillRectangle(brush, 0, 0, pnSample.Width, pnSample.Height);
                brush.Dispose();
            }

            g.DrawRectangle(SystemPens.ControlDark, 0, 0, pnSample.Width - 1, pnSample.Height - 1);
        }

        private void Change()
        {
            pnSample.Refresh();
        }

        private void cbxSolidColor_ColorSelected(object sender, EventArgs e)
        {
            SolidFill.Color = cbxSolidColor.Color;
            Change();
        }

        private void cbxLinearStartColor_ColorSelected(object sender, EventArgs e)
        {
            LinearGradientFill.StartColor = cbxLinearStartColor.Color;
            Change();
        }

        private void cbxLinearEndColor_ColorSelected(object sender, EventArgs e)
        {
            LinearGradientFill.EndColor = cbxLinearEndColor.Color;
            Change();
        }

        private void trbLinearFocus_ValueChanged(object sender, EventArgs e)
        {
            LinearGradientFill.Focus = trbLinearFocus.Value / 100f;
            Change();
        }

        private void trbLinearContrast_ValueChanged(object sender, EventArgs e)
        {
            LinearGradientFill.Contrast = trbLinearContrast.Value / 100f;
            Change();
        }

        private void acLinearAngle_AngleChanged(object sender, EventArgs e)
        {
            LinearGradientFill.Angle = acLinearAngle.Angle;
            Change();
        }

        private void cbxPathCenterColor_ColorSelected(object sender, EventArgs e)
        {
            PathGradientFill.CenterColor = cbxPathCenterColor.Color;
            Change();
        }

        private void cbxPathEdgeColor_ColorSelected(object sender, EventArgs e)
        {
            PathGradientFill.EdgeColor = cbxPathEdgeColor.Color;
            Change();
        }

        private void rbPathEllipse_CheckedChanged(object sender, EventArgs e)
        {
            PathGradientFill.Style = rbPathEllipse.Checked ? PathGradientStyle.Elliptic : PathGradientStyle.Rectangular;
            Change();
        }

        private void cbxHatchForeColor_ColorSelected(object sender, EventArgs e)
        {
            HatchFill.ForeColor = cbxHatchForeColor.Color;
            Change();
        }

        private void cbxHatchBackColor_ColorSelected(object sender, EventArgs e)
        {
            HatchFill.BackColor = cbxHatchBackColor.Color;
            Change();
        }

        private void cbxHatch_HatchSelected(object sender, EventArgs e)
        {
            HatchFill.Style = cbxHatch.Style;
            Change();
        }

        private void cbxGlassColor_ColorSelected(object sender, EventArgs e)
        {
            GlassFill.Color = cbxGlassColor.Color;
            Change();
        }

        private void trbGlassBlend_ValueChanged(object sender, EventArgs e)
        {
            GlassFill.Blend = trbGlassBlend.Value / 100f;
            Change();
        }

        private void cbGlassHatch_CheckedChanged(object sender, EventArgs e)
        {
            GlassFill.Hatch = cbGlassHatch.Checked;
            Change();
        }

        private void btnOpenFileDialog_Click(object sender, EventArgs e)
        {
            if (Dialogs.OpenImage(out string fileName))
            {
                TextureFill = new TextureFill(File.ReadAllBytes(fileName));
                Fill = TextureFill;
                Change();
            }
        }

        private void numImgWidth_ValueChanged(object sender, EventArgs e)
        {
            if (TextureFill.ImageWidth == (int)numImgWidth.Value)
                return;
            TextureFill.ImageWidth = (int)numImgWidth.Value;
            numImgHeight.Value = TextureFill.ImageHeight;
            Change();
        }

        private void numImgHeight_ValueChanged(object sender, EventArgs e)
        {
            if (TextureFill.ImageHeight == (int)numImgHeight.Value)
                return;
            TextureFill.ImageHeight = (int)numImgHeight.Value;
            Change();
            numImgWidth.Value = TextureFill.ImageWidth;
        }

        private void numOffsetX_ValueChanged(object sender, EventArgs e)
        {
            if (TextureFill.ImageOffsetX == (int)numOffsetX.Value)
                return;
            TextureFill.ImageOffsetX = (int)numOffsetX.Value;
            Change();
            numOffsetX.Value = TextureFill.ImageOffsetX;
        }

        private void numOffsetY_ValueChanged(object sender, EventArgs e)
        {
            if (TextureFill.ImageOffsetY == (int)numOffsetY.Value)
                return;
            TextureFill.ImageOffsetY = (int)numOffsetY.Value;
            Change();
            numOffsetY.Value = TextureFill.ImageOffsetY;
        }

        private void chBxPreserveRatio_CheckedChanged(object sender, EventArgs e)
        {
            TextureFill.PreserveAspectRatio = chBxPreserveRatio.Checked;
            Fill = TextureFill;
            Change();
        }

        private void cbWrapMode_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (Convert.ToString(cbWrapMode.SelectedItem))
            {
                case "Clamp":
                    TextureFill.WrapMode = WrapMode.Clamp;
                    break;
                case "Tile":
                    TextureFill.WrapMode = WrapMode.Tile;
                    break;
                case "TileFlipX":
                    TextureFill.WrapMode = WrapMode.TileFlipX;
                    break;
                case "TileFlipY":
                    TextureFill.WrapMode = WrapMode.TileFlipY;
                    break;
                case "TileFlipXY":
                    TextureFill.WrapMode = WrapMode.TileFlipXY;
                    break;
            }
            Fill = TextureFill;
            Change();
        }

        public FillEditorForm()
        {
            InitializeComponent();
            PopulateFills();
            Localize();
            UIUtils.CheckRTL(this);
            UpdateDpiDependencies();
        }

        internal class FillSample : Panel
        {
            public FillSample()
            {
                Size = new Size(156, 156);
                SetStyle(ControlStyles.AllPaintingInWmPaint, true);
                SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            }
        }
    }
}