using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using Beefy.widgets;
using Beefy.utils;
using Beefy;
using Beefy.gfx;
using Beefy.theme.dark;

namespace IDE
{
    public static class IDEUtils
    {
		public const char8 cNativeSlash = Path.DirectorySeparatorChar;
		public const char8 cOtherSlash = Path.AltDirectorySeparatorChar;        

		public static void AppendWithOptionalQuotes(String targetStr, String srcFileName)
		{
		    if (!srcFileName.Contains(' '))
			    targetStr.Append(srcFileName);
			else
				targetStr.Append("\"", srcFileName, "\"");
		}

        public static bool FixFilePath(String filePath, char8 wantSlash, char8 otherSlash)
        {
            if (filePath.Length == 0)
                return false;

            if (filePath[0] == '<')
                return false;

            if ((filePath.Length > 1) && (filePath[1] == ':'))
				filePath[0] = filePath[0].ToLower;

			bool prevWasSlash = false;
            for (int i = 0; i < filePath.Length; i++)
            {
				if (filePath[i] == otherSlash)
					filePath[i] = wantSlash;

				if (filePath[i] == wantSlash)
				{
					if ((prevWasSlash) && (i > 1))
					{
						filePath.Remove(i);
						i--;
						continue;
					}

					prevWasSlash = true;
				}
				else
					prevWasSlash = false;

                if ((i >= 4) && (filePath[i - 3] == wantSlash) && (filePath[i - 2] == '.') && (filePath[i - 1] == '.') && (filePath[i] == wantSlash))
                {
                    int prevSlash = filePath.LastIndexOf(wantSlash, i - 4);
                    if (prevSlash != -1)
                    {
						if ((i - prevSlash != 6) || (filePath[prevSlash + 1] != '.') || (filePath[prevSlash + 2] != '.'))
						{
                            filePath.Remove(prevSlash, i - prevSlash);
                        	i = prevSlash;
						}
                    }
                }
            }
			return true;
        }

		public static bool FixFilePath(String filePath)
		{
			return FixFilePath(filePath, cNativeSlash, cOtherSlash);
		}

		public static bool MakeComparableFilePath(String filePath)
		{
			bool success = FixFilePath(filePath, cNativeSlash, cOtherSlash);
			if (!Environment.IsFileSystemCaseSensitive)
				filePath.ToUpper();
			return success;
		}

		public static bool CanonicalizeFilePath(String filePath)
		{
			return FixFilePath(filePath, '/', '\\');
		}

		public static void AddSortedEntries(List<String> stringList, IEnumerator<String> strs)
		{
			for (var str in strs)
				stringList.Add(str);
			//TODO: Sort
		}

        public static bool IsHeaderFile(String fileName)
        {
            return fileName.EndsWith(".h", StringComparison.OrdinalIgnoreCase) || fileName.EndsWith(".hpp", StringComparison.OrdinalIgnoreCase);
        }

        public static int64 GetLastModifiedTime(String filePath)
        {
            DateTime dt = File.GetLastWriteTime(filePath);
            //return dt.ToFileTime();

			//ThrowUnimplemented();
			return dt.ToFileTime();
        }

        public static void SelectNextChildWidget(Widget parentWidget, bool doBackwards)
        {
            Widget firstTabWidget = null;
            Widget lastTabWidget = null;
            bool prevWasSelected = false;

            for (var childWidget in parentWidget.mChildWidgets)
            {
                if ((!doBackwards) && (prevWasSelected))
                {
                    childWidget.SetFocus();
                    return;
                }

                if ((childWidget.mHasFocus) && (lastTabWidget != null))
                {
                    lastTabWidget.SetFocus();
                    return;
                }

                prevWasSelected = childWidget.mHasFocus;

                if (firstTabWidget == null)
                    firstTabWidget = childWidget;
                lastTabWidget = childWidget;
            }
            
            if ((!doBackwards) && (firstTabWidget != null))
                firstTabWidget.SetFocus();

            if ((doBackwards) && (lastTabWidget != null))
                lastTabWidget.SetFocus();
        }

        public static void SerializeListViewState(StructuredData data, ListView listView)
        {
            using (data.CreateArray("Columns", true))
            {
                for (var column in listView.mColumns)
                {
                    using (data.CreateObject())
                    {                        
                        data.Add("Width", column.mWidth);
                    }
                }
            }            
        }

        public static void DeserializeListViewState(StructuredData data, ListView listView)
        {
            //using (data.Open("Columns"))
			int columnIdx = 0;
			for (var _t in data.Enumerate("Columns"))
            {
                //for (int32 columnIdx = 0; columnIdx < data.Count; columnIdx++)
                {
                    //using (data.Open(@columnKV))
                    {
                        listView.mColumns[columnIdx].mWidth = data.GetFloat("Width");
                    }

					++columnIdx;
                }
            }
        }

        public static void DrawWait(Graphics g, float x, float y, int updateCnt)
        {
            var image = DarkTheme.sDarkTheme.GetImage(DarkTheme.ImageIdx.WaitSegment);
            image.mPixelSnapping = PixelSnapping.Never;

            float colorPct = updateCnt / 100.0f;
            colorPct -= (int32)colorPct;

            for (int32 i = 0; i < 8; i++)
            {
                float brightness = 1.0f;
                float wheelPct = i / 8.0f;

                float dist;
                if (wheelPct > colorPct)                
                    dist = (1.0f - wheelPct) + colorPct;                
                else                
                    dist = colorPct - wheelPct;                
                
                brightness -= dist * 1.0f;

                Matrix mat = Matrix.IdentityMatrix;
                mat.Translate(-9.5f, -14);
                mat.Rotate(Math.PI_f * i / 4);
                mat.Translate(x, y);
                using (g.PushColor(Color.Get(brightness)))
                    using (g.PushMatrix(mat))
                        g.Draw(image);
            }
        }

		public static void DrawOutline(Graphics g, Widget widget, int inflateX, int inflateY, uint32 color)
		{
		    using (g.PushColor(color))
		    {
		        g.OutlineRect(widget.mX - inflateX, widget.mY - inflateY, widget.mWidth + inflateX * 2, widget.mHeight + inflateY * 2);
		    }
		}

		public static void DrawOutline(Graphics g, Widget widget, int inflateX = 0, int32 inflateY = 0)
		{
		    DrawOutline(g, widget, inflateX, inflateY, IDEApp.cDialogOutlineLightColor);
			DrawOutline(g, widget, inflateX - 1, inflateY - 1, IDEApp.cDialogOutlineDarkColor);
		}

		public static void ClampMenuCoords(ref float x, ref float y, ScrollableWidget scrollableWidget, Insets insets = null)
		{
			var insets;
			if (insets == null)
				insets = scope:: .();

			var visibleContentRange = scrollableWidget.GetVisibleContentRange();
			if (y > visibleContentRange.Bottom)
				y = visibleContentRange.Bottom - insets.mBottom;
			if (y < visibleContentRange.Top)
				y = visibleContentRange.Top + insets.mTop;
			if (x > visibleContentRange.Right)
				x = visibleContentRange.Right - insets.mRight;
			if (x < visibleContentRange.Left)
				x = visibleContentRange.Left + insets.mLeft;
		}

		public static void DrawLock(Graphics g, float x, float y, bool isLocked, float pct)
		{
			if (pct > 0)
			{
				int32 circleCount = 2;
				for (int32 i = 0; i < circleCount; i++)
				{
				    float sepPct = 0.3f;
				    float maxSep = (circleCount - 2) * sepPct;
				    float circlePct = (pct - maxSep + (i * 0.3f)) / (1.0f - maxSep);
				    if ((circlePct < 0.0f) || (circlePct > 1.0f))
				        continue;

				    float scale = (float)Math.Sin(circlePct * Math.PI_f / 2) * 0.8f;
				    float alpha = Math.Min(1.0f, (1.0f - (float)Math.Sin(circlePct * Math.PI_f / 2)) * 1.0f);

					using (g.PushTranslate(x - GS!(22), y - GS!(22)))
					{
					    using (g.PushColor(Color.Get(0x00FF0000, alpha)))
					    {
					        using (g.PushScale(scale, scale, GS!(32), GS!(32)))
					            g.Draw(IDEApp.sApp.mCircleImage);
					    }                
					}
				}
			}

			using (g.PushColor(isLocked ? 0xFFFFFFFF : 0x80000000))
			{
				var x;
				var y;
				if (pct > 0)
				{
					let rand = scope Random((int32)(Math.Pow(pct, 0.6f) * 20));
					x += (float)rand.NextDoubleSigned() * (1.5f - pct);
					y += (float)rand.NextDoubleSigned() * (1.5f - pct);
				}

				g.Draw(DarkTheme.sDarkTheme.GetImage(.LockIcon), x, y);
			}
		}
    }
}

static
{
	public static mixin Set(String val1, String val2)
	{
		val1.Set(val2);
	}

	public static mixin Set(List<String> val1, List<String> val2)
	{
		ClearAndDeleteItems(val1);
		for (var str in val2)
			val1.Add(new String(str));
	}

	public static mixin Set(var val1, var val2)
	{
		val1 = val2;
	}
}