// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using Microsoft.AspNetCore.Testing;
using Microsoft.Extensions.Primitives;
using Xunit;

namespace Microsoft.AspNetCore.Http
{
    public class HostStringTests
    {
        [Theory]
        [InlineData(0)]
        [InlineData(-1)]
        public void CtorThrows_IfPortIsNotGreaterThanZero(int port)
        {
            // Act and Assert
            ExceptionAssert.ThrowsArgumentOutOfRange(() => new HostString("localhost", port), "port", "The value must be greater than zero.");
        }

        [Theory]
        [InlineData("localhost", "localhost")]
        [InlineData("1.2.3.4", "1.2.3.4")]
        [InlineData("[2001:db8:a0b:12f0::1]", "[2001:db8:a0b:12f0::1]")]
        [InlineData("本地主機", "本地主機")]
        [InlineData("localhost:5000", "localhost")]
        [InlineData("1.2.3.4:5000", "1.2.3.4")]
        [InlineData("[2001:db8:a0b:12f0::1]:5000", "[2001:db8:a0b:12f0::1]")]
        [InlineData("本地主機:5000", "本地主機")]
        public void Domain_ExtractsHostFromValue(string sourceValue, string expectedDomain)
        {
            // Arrange
            var hostString = new HostString(sourceValue);

            // Act
            var result = hostString.Host;

            // Assert
            Assert.Equal(expectedDomain, result);
        }

        [Theory]
        [InlineData("localhost", null)]
        [InlineData("1.2.3.4", null)]
        [InlineData("[2001:db8:a0b:12f0::1]", null)]
        [InlineData("本地主機", null)]
        [InlineData("localhost:5000", 5000)]
        [InlineData("1.2.3.4:5000", 5000)]
        [InlineData("[2001:db8:a0b:12f0::1]:5000", 5000)]
        [InlineData("本地主機:5000", 5000)]
        public void Port_ExtractsPortFromValue(string sourceValue, int? expectedPort)
        {
            // Arrange
            var hostString = new HostString(sourceValue);

            // Act
            var result = hostString.Port;

            // Assert
            Assert.Equal(expectedPort, result);
        }

        [Theory]
        [InlineData("localhost:BLAH")]
        public void Port_ExtractsInvalidPortFromValue(string sourceValue)
        {
            // Arrange
            var hostString = new HostString(sourceValue);

            // Act
            var result = hostString.Port;

            // Assert
            Assert.Null(result);
        }

        [Theory]
        [InlineData("localhost", 5000, "localhost", 5000)]
        [InlineData("1.2.3.4", 5000, "1.2.3.4", 5000)]
        [InlineData("[2001:db8:a0b:12f0::1]", 5000, "[2001:db8:a0b:12f0::1]", 5000)]
        [InlineData("2001:db8:a0b:12f0::1", 5000, "[2001:db8:a0b:12f0::1]", 5000)]
        [InlineData("本地主機", 5000, "本地主機", 5000)]
        public void Ctor_CreatesFromHostAndPort(string sourceHost, int sourcePort, string expectedHost, int expectedPort)
        {
            // Arrange
            var hostString = new HostString(sourceHost, sourcePort);

            // Act
            var host = hostString.Host;
            var port = hostString.Port;

            // Assert
            Assert.Equal(expectedHost, host);
            Assert.Equal(expectedPort, port);
        }

        [Fact]
        public void Equals_EmptyHostStringAndDefaultHostString()
        {
            // Act and Assert
            Assert.Equal(default(HostString), new HostString(string.Empty));
            Assert.Equal(default(HostString), new HostString(string.Empty));
            // explicitly checking == operator
            Assert.True(new HostString(string.Empty) == default(HostString));
            Assert.True(default(HostString) == new HostString(string.Empty));
        }

        [Fact]
        public void NotEquals_DefaultHostStringAndNonNullHostString()
        {
            // Arrange
            var hostString = new HostString("example.com");

            // Act and Assert
            Assert.NotEqual(default(HostString), hostString);
        }

        [Fact]
        public void NotEquals_EmptyHostStringAndNonNullHostString()
        {
            // Arrange
            var hostString = new HostString("example.com");

            // Act and Assert
            Assert.NotEqual(hostString, new HostString(string.Empty));
        }

        [Theory]
        [InlineData("localHost", "localhost")]
        [InlineData("localHost", "*")] // Any - Used by HttpSys
        [InlineData("localhost:9090", "localHost")]
        [InlineData("example.com:443", "example.com")]
        [InlineData("foo.eXample.com:443", "*.exampLe.com")]
        [InlineData("f.eXample.com:443", "*.exampLe.com")]
        [InlineData("a.b.c.eXample.com:443", "*.exampLe.com")]
        [InlineData("127.0.0.1", "127.0.0.1")]
        [InlineData("127.0.0.1:443", "127.0.0.1")]
        [InlineData("xn--c1yn36f:443", "xn--c1yn36f")]
        [InlineData("點看", "點看")]
        [InlineData("[::ABC]", "[::aBc]")]
        [InlineData("[::1]:80", "[::1]")]
        [InlineData("[::1]:", "[::1]")]
        [InlineData("::1", "[::1]")]
        public void HostMatches(string host, string pattern)
        {
            Assert.True(HostString.MatchesAny(host, new StringSegment[] { pattern }));
        }

        [Theory]
        [InlineData("example.com", "localhost")]
        [InlineData("localhost:9090", "example.com")]
        [InlineData(":80", "localhost")]
        [InlineData(":", "localhost")]
        [InlineData("example.com:443", "*.example.com")]
        [InlineData(".example.com:443", "*.example.com")]
        [InlineData("foo.com:443", "*.example.com")]
        [InlineData("foo.example.com.bar:443", "*.example.com")]
        [InlineData(".com:443", "*.com")]
        [InlineData("xn--c1yn36f:443", "點看")]
        [InlineData("[::1", "[::1]")]
        [InlineData("[::1:80", "[::1]")]
        [InlineData("::1", "::1")] // Brackets are added to the host before the comparison
        public void HostDoesntMatch(string host, string pattern)
        {
            Assert.False(HostString.MatchesAny(host, new StringSegment[] { pattern }));
        }

        [Fact]
        public void HostMatchThrowsForBadPort()
        {
            Assert.Throws<FormatException>(() => HostString.MatchesAny("example.com:1abc", new StringSegment[] { "example.com" }));
        }
    }
}