// --------------------------------------------------------------------------------------------------------------------
// <copyright file="SvgWriterTests.cs" company="OxyPlot">
//   Copyright (c) 2014 OxyPlot contributors
// </copyright>
// --------------------------------------------------------------------------------------------------------------------

namespace OxyPlot.Tests
{
    using System.Collections.Generic;
    using System.Diagnostics.CodeAnalysis;
    using System.IO;

    using NUnit.Framework;

    // ReSharper disable InconsistentNaming
    [SuppressMessage("StyleCop.CSharp.DocumentationRules", "SA1600:ElementsMustBeDocumented", Justification = "Reviewed. Suppression is OK here.")]
    [TestFixture]
    public class SvgWriterTests
    {
        [Test]
        public void WriteEllipse()
        {
            const string FileName = "SvgWriterTests_WriteEllipse.svg";
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 200, 200))
                {
                    w.WriteEllipse(
                        10,
                        10,
                        100,
                        60,
                        w.CreateStyle(OxyColors.Blue, OxyColors.Black, 2, LineStyle.Solid.GetDashArray()));
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WriteLine()
        {
            const string FileName = "SvgWriterTests_WriteLine.svg";
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 200, 200))
                {
                    w.WriteLine(
                        new ScreenPoint(10, 10),
                        new ScreenPoint(150, 80),
                        w.CreateStyle(OxyColors.Undefined, OxyColors.Black, 2, LineStyle.Solid.GetDashArray()));
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WritePolygon()
        {
            const string FileName = "SvgWriterTests_WritePolygon.svg";
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 200, 200))
                {
                    w.WritePolygon(
                        CreatePointList(),
                        w.CreateStyle(OxyColors.Blue, OxyColors.Black, 2, LineStyleHelper.GetDashArray(LineStyle.Solid)));
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WritePolyline()
        {
            const string FileName = "SvgWriterTests_WritePolyLine.svg";
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 200, 200))
                {
                    w.WritePolyline(
                        CreatePointList(),
                        w.CreateStyle(OxyColors.Blue, OxyColors.Black, 2, LineStyleHelper.GetDashArray(LineStyle.Solid)));
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WriteRectangle()
        {
            const string FileName = "SvgWriterTests_WriteRectangle.svg";
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 200, 200))
                {
                    w.WriteRectangle(
                        10,
                        20,
                        150,
                        80,
                        w.CreateStyle(OxyColors.Green, OxyColors.Black, 2, LineStyle.Solid.GetDashArray()));
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WriteText()
        {
            const string FileName = "SvgWriterTests_WriteText.svg";
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 200, 200))
                {
                    w.WriteText(new ScreenPoint(10, 10), "Hello world!", OxyColors.Black, "Arial", 20, FontWeights.Bold);
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WriteClippedEllipse()
        {
            const string FileName = "SvgWriterTests_WriteClippedEllipse.svg";
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 200, 200))
                {
                    w.WriteRectangle(5, 5, 95, 45, w.CreateStyle(OxyColors.LightGreen, OxyColors.Undefined, 0));
                    w.BeginClip(5, 5, 95, 45);
                    w.WriteEllipse(10, 10, 100, 60, w.CreateStyle(OxyColors.Blue, OxyColors.Black, 2));
                    w.EndClip();
                    w.Flush();
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WriteImage()
        {
            const string FileName = "SvgWriterTests_WriteImage.svg";
            var image = CreateImage();
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 500, 300))
                {
                    for (int y = 0; y <= 200; y += 20)
                    {
                        w.WriteLine(new ScreenPoint(0, y), new ScreenPoint(400, y), w.CreateStyle(OxyColors.Undefined, OxyColors.Black, 1));
                    }

                    w.WriteImage(0, 0, 400, 200, image);
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        [Test]
        public void WriteClippedImage()
        {
            const string FileName = "SvgWriterTests_WriteClippedImage.svg";
            var image = CreateImage();
            using (var s = File.Create(FileName))
            {
                using (var w = new SvgWriter(s, 400, 400))
                {
                    w.WriteImage(0, 0, 400, 200, image);
                    w.WriteRectangle(100, 50, 200, 100, w.CreateStyle(OxyColors.Undefined, OxyColors.Black, 1));
                    w.WriteImage(1, 0.5, 2, 1, 100, 250, 200, 100, image);
                }
            }

            SvgAssert.IsValidFile(FileName);
        }

        private static OxyImage CreateImage()
        {
            var data = new OxyColor[4, 2];
            data[0, 0] = OxyColors.Blue;
            data[1, 0] = OxyColors.Green;
            data[2, 0] = OxyColors.Red;
            data[3, 0] = OxyColors.White;
            data[0, 1] = OxyColors.Transparent;
            data[3, 1] = OxyColor.FromAColor(127, OxyColors.Yellow);
            data[1, 1] = OxyColor.FromAColor(127, OxyColors.Orange);
            data[2, 1] = OxyColor.FromAColor(127, OxyColors.Pink);
            return OxyImage.Create(data, ImageFormat.Png);
        }

        private static IEnumerable<ScreenPoint> CreatePointList()
        {
            return new List<ScreenPoint>
                {
                    new ScreenPoint(10, 20),
                    new ScreenPoint(80, 30),
                    new ScreenPoint(140, 120),
                    new ScreenPoint(30, 140)
                };
        }
    }
}