// 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 Microsoft.AspNetCore.Http;
using Moq;
using Xunit;

namespace Microsoft.AspNetCore.ApiAuthorization.IdentityServer
{
    public class AbsoluteUrlFactoryTests
    {
        [Fact]
        public void GetAbsoluteUrl_ReturnsNull_ForInvalidData()
        {
            // Arrange
            var accessor = new Mock<IHttpContextAccessor>();
            var factory = new AbsoluteUrlFactory(accessor.Object);
            var path = "something|invalid";

            // Act
            var result = factory.GetAbsoluteUrl(path);

            // Assert
            Assert.Null(result);
        }

        [Fact]
        public void GetAbsoluteUrl_ReturnsUnmodifiedUrl_ForAbsoluteUrls()
        {
            // Arrange
            var accessor = new Mock<IHttpContextAccessor>();
            var factory = new AbsoluteUrlFactory(accessor.Object);
            var path = "https://localhost:5001/authenticate";

            // Act
            var result = factory.GetAbsoluteUrl(path);

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

        [Fact]
        public void GetAbsoluteUrl_ReturnsContextBasedAbsoluteUrl_ForRelativeUrls()
        {
            // Arrange
            var ctx = new DefaultHttpContext();
            ctx.Request.Scheme = "https";
            ctx.Request.Host = new HostString("localhost:5001");
            ctx.Request.PathBase = "/virtual";

            var accessor = new Mock<IHttpContextAccessor>();
            accessor.SetupGet(c => c.HttpContext).Returns(ctx);
            var factory = new AbsoluteUrlFactory(accessor.Object);
            var path = "/authenticate";

            // Act
            var result = factory.GetAbsoluteUrl(path);

            // Assert
            Assert.Equal("https://localhost:5001/virtual/authenticate", result);
        }
    }
}