using System.Linq;
using Xunit;

namespace Wabbajack.Paths.Test
{
    public class AbsolutePathTests
    {
        [Fact]
        public void CanParsePaths()
        {
            Assert.Equal(((AbsolutePath)@"c:\foo\bar").ToString(), ((AbsolutePath)@"c:\foo\bar").ToString());
        }

        [Fact]
        public void CanGetParentPath()
        {
            Assert.Equal(((AbsolutePath)@"c:\foo").ToString(), ((AbsolutePath)@"c:\foo\bar").Parent.ToString());
        }

        [Fact]
        public void ParentOfTopLevelPathThrows()
        {
            Assert.Throws<PathException>(() => ((AbsolutePath)@"c:\").Parent.ToString());
        }

        [Fact]
        public void CanCreateRelativePathsFromAbolutePaths()
        {
            Assert.Equal((RelativePath)@"baz\qux.zip",
                ((AbsolutePath)@"\\foo\bar\baz\qux.zip").RelativeTo((AbsolutePath)@"\\foo\bar"));
            Assert.Throws<PathException>(() =>
                ((AbsolutePath)@"\\foo\bar\baz\qux.zip").RelativeTo((AbsolutePath)@"\\z\bar"));
            Assert.Throws<PathException>(() =>
                ((AbsolutePath)@"\\foo\bar\baz\qux.zip").RelativeTo((AbsolutePath)@"\\z\bar\buz"));
        }

        [Fact]
        public void PathsAreEquatable()
        {
            Assert.Equal((AbsolutePath)@"c:\foo", (AbsolutePath)@"c:\foo");

            Assert.True((AbsolutePath)@"c:\foo" == (AbsolutePath)@"c:\Foo");
            Assert.False((AbsolutePath)@"c:\foo" != (AbsolutePath)@"c:\Foo");
            Assert.NotEqual((AbsolutePath)@"c:\foo", (AbsolutePath)@"c:\bar");
            Assert.NotEqual((AbsolutePath)@"c:\foo\bar", (AbsolutePath)@"c:\foo");
        }

        [Fact]
        public void CanGetPathHashCodes()
        {
            Assert.Equal(@"c:\foo\bar.baz".ToAbsolutePath().GetHashCode(),
                @"C:\Foo\Bar.bAz".ToAbsolutePath().GetHashCode());
        }


        [Fact]
        public void CaseInsensitiveEquality()
        {
            Assert.Equal(@"c:\foo\bar.baz".ToAbsolutePath(), @"C:\Foo\Bar.bAz".ToAbsolutePath());
            Assert.NotEqual(@"c:\foo\bar.baz".ToAbsolutePath(), (object)42);
        }

        [Fact]
        public void CanReplaceExtensions()
        {
            Assert.Equal(new Extension(".dds"), ((AbsolutePath)@"/foo/bar.dds").Extension);
            Assert.Equal((RelativePath)"bar.dds", ((AbsolutePath)@"/foo/bar.dds").FileName);
            Assert.Equal((AbsolutePath)@"/foo/bar.zip",
                ((AbsolutePath)@"/foo/bar.dds").ReplaceExtension(new Extension(".zip")));
            Assert.Equal((AbsolutePath)@"/foo\bar.zip",
                ((AbsolutePath)@"/foo\bar").ReplaceExtension(new Extension(".zip")));
        }

        [Fact]
        public void CanGetPathFormats()
        {
            Assert.Equal(PathFormat.Windows, ((AbsolutePath)@"c:\foo\bar").PathFormat);
            Assert.Equal(PathFormat.Windows, ((AbsolutePath)@"\\foo\bar").PathFormat);
            Assert.Equal(PathFormat.Unix, ((AbsolutePath)@"/foo/bar").PathFormat);
            Assert.Throws<PathException>(() => ((AbsolutePath)@"c!\foo/bar").PathFormat);
        }

        [Fact]
        public void CanCombinePaths()
        {
            Assert.Equal("/foo/bar/baz/qux",
                ((AbsolutePath)"/").Combine("foo", (RelativePath)"bar", "baz/qux").ToString());
            Assert.Throws<PathException>(() => ((AbsolutePath)"/").Combine(42));
        }

        [Fact]
        public void CanConvertPathsToStrings()
        {
            Assert.Equal("/foo/bar", ((AbsolutePath)"/foo/bar").ToString());
        }

        [Fact]
        public void PathsAreComparable()
        {
            var data = new[]
            {
                (AbsolutePath)@"c:\a",
                (AbsolutePath)@"c:\b\c",
                (AbsolutePath)@"c:\d\e\f",
                (AbsolutePath)@"c:\b"
            };
            var data2 = data.OrderBy(a => a).ToArray();

            var data3 = new[]
            {
                (AbsolutePath)@"c:\a",
                (AbsolutePath)@"c:\b",
                (AbsolutePath)@"c:\b\c",
                (AbsolutePath)@"c:\d\e\f"
            };
            Assert.Equal(data3, data2);
        }
    }
}