using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Azimuth;
using Annulus.DiscreteCollisionDetection;

namespace Annulus.UnitTests.DiscreteCollisionDetection
{
    public class CornerPointTests : UnitTestSharp.TestFixture
    {
        public void Basic_Inside()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(2, 2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);

            CheckEqual(CornerPoint.Result.Inside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Basic_Outside_II()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(-2, 2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);

            CheckEqual(CornerPoint.Result.Outside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Basic_Outside_III()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(-2, -2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);

            CheckEqual(CornerPoint.Result.Outside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Basic_Outside_IV()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(2, -2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);

            CheckEqual(CornerPoint.Result.Outside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Reverse_Inside()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(2, 2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.Outside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Reverse_Outside_II()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(-2, 2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.Inside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Reverse_Outside_III()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(-2, -2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.Inside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Reverse_Outside_IV()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(2, -2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.Inside, result);
            Check(result.IsInsideOrOutside());
        }

        public void AntiParallel()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(1, -2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.Inside, result);
            Check(result.IsInsideOrOutside());
        }

        public void OnTrailing()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(1, 2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.OnTrailing, result);
            Check(result.IsOnAnEdge());
        }

        public void OnLeading()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(2, 1);
            var point = new Vector(2, 1);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.OnLeading, result);
            Check(result.IsOnAnEdge());
        }

        public void Degenerate_NotOnEdge_Inside()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(1, 2);
            var point = new Vector(2, 1);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.Inside, result);
            CheckFalse(result.IsOnAnEdge());
        }

        public void Degenerate_NotOnEdge_Outside()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(1, 2);
            var point = new Vector(2, 1);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);

            CheckEqual(CornerPoint.Result.Outside, result);
            CheckFalse(result.IsOnAnEdge());
        }

        public void Degenerate_OnEdge()
        {
            var commonPoint = new Vector(1, 1);
            var tralingEdge = new Vector(1, 2);
            var leadingEdge = new Vector(1, 2);
            var point = new Vector(1, 2);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.OnLeading | CornerPoint.Result.OnTrailing, result);
            Check(result.IsOnAnEdge());
        }

        public void AntiParallelEdges_Inside()
        {
            var commonPoint = new Vector(0, 0);
            var tralingEdge = new Vector(0, 2);
            var leadingEdge = new Vector(0, -2);
            var point = new Vector(2, 0);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 1);

            CheckEqual(CornerPoint.Result.Inside, result);
            Check(result.IsInsideOrOutside());
        }

        public void AntiParallelEdges_Outside()
        {
            var commonPoint = new Vector(0, 0);
            var tralingEdge = new Vector(0, 2);
            var leadingEdge = new Vector(0, -2);
            var point = new Vector(2, 0);

            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);

            CheckEqual(CornerPoint.Result.Outside, result);
            Check(result.IsInsideOrOutside());
        }

        public void Degenerate_Trailing()
        {
            var commonPoint = new Vector(0, 0);
            var tralingEdge = new Vector(0, 0);
            var leadingEdge = new Vector(0, 2);
            var point = new Vector(2, 0);

            CheckThrow(typeof(Exception));
            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);
        }

        public void Degenerate_Leading()
        {
            var commonPoint = new Vector(0, 0);
            var tralingEdge = new Vector(0, 2);
            var leadingEdge = new Vector(0, 0);
            var point = new Vector(2, 0);

            CheckThrow(typeof(Exception));
            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);
        }

        public void Degenerate_Point()
        {
            var commonPoint = new Vector(0, 0);
            var tralingEdge = new Vector(0, -2);
            var leadingEdge = new Vector(0, 2);
            var point = new Vector(0, 0);

            CheckThrow(typeof(Exception));
            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, -1);
        }

        public void Degenerate_CornerWinding()
        {
            var commonPoint = new Vector(0, 0);
            var tralingEdge = new Vector(0, -2);
            var leadingEdge = new Vector(0, 2);
            var point = new Vector(2, 0);

            CheckThrow(typeof(Exception));
            var result = CornerPoint.FindIntersection
                (commonPoint, tralingEdge, leadingEdge, point, 0);
        }
    }
}