using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.Remoting.Messaging;

using NUnit.Framework;

using Xamarin.UITest;
using Xamarin.UITest.Queries;
using Xamarin.UITest.Android;
using Xamarin.UITest.iOS;
using System.Globalization;

namespace Xamarin.Forms.Core.UITests
{
	internal class Matrix : Object
	{
		public double M00, M01, M02, M03;
		public double M10, M11, M12, M13;
		public double M20, M21, M22, M23;
		public double M30, M31, M32, M33;

		public void Log () {

			//Logger.LogLine ();

			//Logger.LogLine (string.Format ("{0,-3}, {1,-3}, {2,-3}, {3,-3}", M00, M01, M02, M03));
			//Logger.LogLine (string.Format ("{0,-3}, {1,-3}, {2,-3}, {3,-3}", M10, M11, M12, M13));
			//Logger.LogLine (string.Format ("{0,-3}, {1,-3}, {2,-3}, {3,-3}", M20, M21, M22, M23));
			//Logger.LogLine (string.Format ("{0,-3}, {1,-3}, {2,-3}, {3,-3}", M30, M31, M32, M33));

			//Logger.LogLine ();
		}

		public override bool Equals (object obj)
		{
			if (obj == null)
				return false;

			var transform = obj as Matrix;
			if ((Object)transform == null)
				return false;

			const double tolerance = 0.01;
			bool result = 
				Math.Abs (M00 - transform.M00) < tolerance &&
				Math.Abs (M01 - transform.M01) < tolerance &&
				Math.Abs (M02 - transform.M02) < tolerance &&
				Math.Abs (M03 - transform.M03) < tolerance &&
				Math.Abs (M10 - transform.M10) < tolerance &&
				Math.Abs (M11 - transform.M11) < tolerance &&
				Math.Abs (M12 - transform.M12) < tolerance &&
				Math.Abs (M13 - transform.M13) < tolerance &&
				Math.Abs (M20 - transform.M20) < tolerance &&
				Math.Abs (M21 - transform.M21) < tolerance &&
				Math.Abs (M22 - transform.M22) < tolerance &&
				Math.Abs (M23 - transform.M23) < tolerance &&
				Math.Abs (M30 - transform.M30) < tolerance &&
				Math.Abs (M31 - transform.M31) < tolerance &&
				Math.Abs (M32 - transform.M32) < tolerance &&
				Math.Abs (M33 - transform.M33) < tolerance;

			return result;
		}

		public override int GetHashCode ()
		{
			return 0;
		}
	}

	internal enum Axis 
	{
		X,
		Y,
		Z
	}
		
	internal static class NumericExtensions
	{
		public static double ToRadians(this float val)
		{
			return (Math.PI / 180.0) * val;
		}

		public static Matrix CalculateRotationMatrixForDegrees (float degrees, Axis rotationAxis) 
		{
			var angle = degrees.ToRadians ();

			var transform = new Matrix ();
			if (rotationAxis == Axis.X) {
				transform.M00 = 1; transform.M01 = 0; transform.M02 = 0; transform.M03 = 0;
				transform.M10 = 0; transform.M11 = (float) Math.Cos (angle); transform.M12 = (float) Math.Sin (angle); transform.M13 = 0;
				transform.M20 = 0; transform.M21 = -(float) Math.Sin (angle); transform.M22 = (float) Math.Cos (angle); transform.M23 = 0;
				transform.M30 = 0; transform.M31 = 0; transform.M32 = 0; transform.M33 = 1;
			} else if (rotationAxis == Axis.Y) {
				transform.M00 = (float) Math.Cos (angle); transform.M01 = 0; transform.M02 = -(float) Math.Sin (angle); transform.M03 = 0;
				transform.M10 = 0; transform.M11 = 1; transform.M12 = 0; transform.M13 = 0;
				transform.M20 = (float) Math.Sin (angle); transform.M21 = 0; transform.M22 = (float) Math.Cos (angle); transform.M23 = 0;
				transform.M30 = 0; transform.M31 = 0; transform.M32 = 0; transform.M33 = 1;
			} else {
				transform.M00 = (float) Math.Cos (angle); transform.M01 = (float) Math.Sin (angle); transform.M02 = 0; transform.M03 = 0;
				transform.M10 = -(float) Math.Sin (angle); transform.M11 = (float) Math.Cos (angle); transform.M12 = 0; transform.M13 = 0;
				transform.M20 = 0; transform.M21 = 0; transform.M22 = 1; transform.M23 = 0;
				transform.M30 = 0; transform.M31 = 0; transform.M32 = 0; transform.M33 = 1;
			}

			return transform;
		}

		public static Matrix BuildScaleMatrix (float scale) 
		{
			var transform = new Matrix ();

			transform.M00 = scale; transform.M01 = 0; transform.M02 = 0; transform.M03 = 0;
			transform.M10 = 0; transform.M11 = scale; transform.M12 = 0; transform.M13 = 0;
			transform.M20 = 0; transform.M21 = 0; transform.M22 = scale; transform.M23 = 0;
			transform.M30 = 0; transform.M31 = 0; transform.M32 = 0; transform.M33 = 1;

			return transform;
		}

	}

}