// Copyright (c) Umbraco.
// See LICENSE for more details.

using System.Collections;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Net;
using System.Reflection;
using System.Threading;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.FileProviders;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Moq;
using NUnit.Framework;
using Umbraco.Cms.Core;
using Umbraco.Cms.Core.Cache;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.Diagnostics;
using Umbraco.Cms.Core.Hosting;
using Umbraco.Cms.Core.Logging;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.Models.Entities;
using Umbraco.Cms.Core.Net;
using Umbraco.Cms.Core.PropertyEditors;
using Umbraco.Cms.Core.Runtime;
using Umbraco.Cms.Infrastructure.Persistence;
using Umbraco.Cms.Persistence.SqlServer.Services;
using Umbraco.Cms.Tests.Common;
using Umbraco.Cms.Tests.Common.Testing;
using Umbraco.Cms.Web.Common.AspNetCore;
using Umbraco.Extensions;
using File = System.IO.File;
using IHostingEnvironment = Umbraco.Cms.Core.Hosting.IHostingEnvironment;

namespace Umbraco.Cms.Tests.Integration.Implementations;

public class TestHelper : TestHelperBase
{
    private readonly IWebHostEnvironment _hostEnvironment;
    private readonly IApplicationShutdownRegistry _hostingLifetime;
    private readonly IHttpContextAccessor _httpContextAccessor;
    private readonly IIpResolver _ipResolver;
    private readonly IBackOfficeInfo _backOfficeInfo;
    private IHostingEnvironment _hostingEnvironment;
    private readonly string _tempWorkingDir;

    public TestHelper()
        : base(typeof(TestHelper).Assembly)
    {
        var httpContext = new DefaultHttpContext();
        httpContext.Connection.RemoteIpAddress = IPAddress.Parse("127.0.0.1");
        _httpContextAccessor = Mock.Of<IHttpContextAccessor>(x => x.HttpContext == httpContext);
        _ipResolver = new AspNetCoreIpResolver(_httpContextAccessor);

        var contentRoot = Assembly.GetExecutingAssembly().GetRootDirectorySafe();

        // The mock for IWebHostEnvironment has caused a good few issues.
        // We can UseContentRoot, UseWebRoot etc on the host builder instead.
        // possibly going down rabbit holes though as would need to cleanup all usages of
        // GetHostingEnvironment & GetWebHostEnvironment.
        var hostEnvironment = new Mock<IWebHostEnvironment>();

        // This must be the assembly name for the WebApplicationFactory to work.
        hostEnvironment.Setup(x => x.ApplicationName).Returns(GetType().Assembly.GetName().Name);
        hostEnvironment.Setup(x => x.ContentRootPath).Returns(() => contentRoot);
        hostEnvironment.Setup(x => x.ContentRootFileProvider).Returns(() => new PhysicalFileProvider(contentRoot));
        hostEnvironment.Setup(x => x.WebRootPath).Returns(() => WorkingDirectory);
        hostEnvironment.Setup(x => x.WebRootFileProvider).Returns(() => new PhysicalFileProvider(WorkingDirectory));
        hostEnvironment.Setup(x => x.EnvironmentName).Returns("Tests");

        // We also need to expose it as the obsolete interface since netcore's WebApplicationFactory casts it.
        hostEnvironment.As<Microsoft.AspNetCore.Hosting.IHostingEnvironment>();

        _hostEnvironment = hostEnvironment.Object;

        _hostingLifetime = new AspNetCoreApplicationShutdownRegistry(Mock.Of<IHostApplicationLifetime>());
        ConsoleLoggerFactory = LoggerFactory.Create(builder => builder.AddConsole());
        ProfilingLogger = new ProfilingLogger(ConsoleLoggerFactory.CreateLogger<ProfilingLogger>(), Profiler);
    }

    public IUmbracoBootPermissionChecker UmbracoBootPermissionChecker { get; } =
        new TestUmbracoBootPermissionChecker();

    public AppCaches AppCaches { get; } = new(
        NoAppCache.Instance,
        NoAppCache.Instance,
        new IsolatedCaches(type => NoAppCache.Instance));

    public ILoggerFactory ConsoleLoggerFactory { get; }

    public IProfilingLogger ProfilingLogger { get; }

    public IProfiler Profiler { get; } = new NoopProfiler();

    public override IBulkSqlInsertProvider BulkSqlInsertProvider => new SqlServerBulkSqlInsertProvider();

    public override IMarchal Marchal { get; } = new AspNetCoreMarchal();

    public IHttpContextAccessor GetHttpContextAccessor() => _httpContextAccessor;

    public IWebHostEnvironment GetWebHostEnvironment() => _hostEnvironment;

    public override IHostingEnvironment GetHostingEnvironment()
        => _hostingEnvironment ??= new TestHostingEnvironment(
            GetIOptionsMonitorOfHostingSettings(),
            GetIOptionsMonitorOfWebRoutingSettings(),
            _hostEnvironment);

    private IOptionsMonitor<HostingSettings> GetIOptionsMonitorOfHostingSettings()
    {
        var hostingSettings = new HostingSettings();
        return Mock.Of<IOptionsMonitor<HostingSettings>>(x => x.CurrentValue == hostingSettings);
    }

    private IOptionsMonitor<WebRoutingSettings> GetIOptionsMonitorOfWebRoutingSettings()
    {
        var webRoutingSettings = new WebRoutingSettings();
        return Mock.Of<IOptionsMonitor<WebRoutingSettings>>(x => x.CurrentValue == webRoutingSettings);
    }

    public override IApplicationShutdownRegistry GetHostingEnvironmentLifetime() => _hostingLifetime;

    public override IIpResolver GetIpResolver() => _ipResolver;

    /// <summary>
    ///     Some test files are copied to the /bin (/bin/debug) on build, this is a utility to return their physical path based
    ///     on a virtual path name
    /// </summary>
    public override string MapPathForTestFiles(string relativePath)
    {
        if (!relativePath.StartsWith("~/"))
        {
            throw new ArgumentException("relativePath must start with '~/'", nameof(relativePath));
        }

        var codeBase = typeof(TestHelperBase).Assembly.CodeBase;
        var uri = new Uri(codeBase);
        var path = uri.LocalPath;
        var bin = Path.GetDirectoryName(path);

        return relativePath.Replace("~/", bin + "/");
    }

    public void AssertPropertyValuesAreEqual(object actual, object expected, Func<IEnumerable, IEnumerable> sorter = null, string[] ignoreProperties = null)
    {
        const int dateDeltaMilliseconds = 1000; // 1s

        var properties = expected.GetType().GetProperties();
        foreach (var property in properties)
        {
            // Ignore properties that are attributed with EditorBrowsableState.Never.
            var att = property.GetCustomAttribute<EditorBrowsableAttribute>(false);
            if (att != null && att.State == EditorBrowsableState.Never)
            {
                continue;
            }

            // Ignore explicitly ignored properties.
            if (ignoreProperties != null && ignoreProperties.Contains(property.Name))
            {
                continue;
            }

            var actualValue = property.GetValue(actual, null);
            var expectedValue = property.GetValue(expected, null);

            AssertAreEqual(property, expectedValue, actualValue, sorter, dateDeltaMilliseconds);
        }
    }

    private static void AssertListsAreEqual(PropertyInfo property, IEnumerable expected, IEnumerable actual, Func<IEnumerable, IEnumerable> sorter = null, int dateDeltaMilliseconds = 0)
    {
        // this is pretty hackerific but saves us some code to write
        sorter ??= enumerable =>
        {
            // semi-generic way of ensuring any collection of IEntity are sorted by Ids for comparison
            var entities = enumerable.OfType<IEntity>().ToList();
            return entities.Count > 0 ? entities.OrderBy(x => x.Id) : entities;
        };

        var expectedListEx = sorter(expected).Cast<object>().ToList();
        var actualListEx = sorter(actual).Cast<object>().ToList();

        if (actualListEx.Count != expectedListEx.Count)
        {
            Assert.Fail(
                "Collection {0}.{1} does not match. Expected IEnumerable containing {2} elements but was IEnumerable containing {3} elements",
                property.PropertyType.Name,
                property.Name,
                expectedListEx.Count,
                actualListEx.Count);
        }

        for (var i = 0; i < actualListEx.Count; i++)
        {
            AssertAreEqual(property, expectedListEx[i], actualListEx[i], sorter, dateDeltaMilliseconds);
        }
    }

    private static void AssertAreEqual(PropertyInfo property, object expected, object actual, Func<IEnumerable, IEnumerable> sorter = null, int dateDeltaMilliseconds = 0)
    {
        if (!(expected is string) && expected is IEnumerable enumerable)
        {
            // sort property collection by alias, not by property ids
            // on members, built-in properties don't have ids (always zero)
            if (expected is PropertyCollection)
            {
                sorter = e => ((PropertyCollection)e).OrderBy(x => x.Alias);
            }

            // compare lists
            AssertListsAreEqual(property, (IEnumerable)actual, enumerable, sorter, dateDeltaMilliseconds);
        }
        else if (expected is DateTime expectedDateTime)
        {
            // compare date & time with delta
            var actualDateTime = (DateTime)actual;
            var delta = (actualDateTime - expectedDateTime).TotalMilliseconds;
            Assert.IsTrue(
                Math.Abs(delta) <= dateDeltaMilliseconds,
                "Property {0}.{1} does not match. Expected: {2} but was: {3}",
                property.DeclaringType.Name,
                property.Name,
                expected,
                actual);
        }
        else if (expected is Property expectedProperty)
        {
            // compare values
            var actualProperty = (Property)actual;
            var expectedPropertyValues =
                expectedProperty.Values.OrderBy(x => x.Culture).ThenBy(x => x.Segment).ToArray();
            var actualPropertyValues = actualProperty.Values.OrderBy(x => x.Culture).ThenBy(x => x.Segment).ToArray();
            if (expectedPropertyValues.Length != actualPropertyValues.Length)
            {
                Assert.Fail(
                    $"{property.DeclaringType.Name}.{property.Name}: Expected {expectedPropertyValues.Length} but got {actualPropertyValues.Length}.");
            }

            for (var i = 0; i < expectedPropertyValues.Length; i++)
            {
                // This is not pretty, but since a property value can be a datetime we can't just always compare them as is.
                // This is made worse by the fact that PublishedValue is not always set, meaning we can't lump it all into the same if block
                if (expectedPropertyValues[i].EditedValue is DateTime expectedEditDateTime)
                {
                    var actualEditDateTime = (DateTime)actualPropertyValues[i].EditedValue;
                    AssertDateTime(
                        expectedEditDateTime,
                        actualEditDateTime,
                        $"{property.DeclaringType.Name}.{property.Name}: Expected draft value \"{expectedPropertyValues[i].EditedValue}\" but got \"{actualPropertyValues[i].EditedValue}\".",
                        dateDeltaMilliseconds);
                }
                else
                {
                    Assert.AreEqual(
                        expectedPropertyValues[i].EditedValue,
                        actualPropertyValues[i].EditedValue,
                        $"{property.DeclaringType.Name}.{property.Name}: Expected draft value \"{expectedPropertyValues[i].EditedValue}\" but got \"{actualPropertyValues[i].EditedValue}\".");
                }

                if (expectedPropertyValues[i].PublishedValue is DateTime expectedPublishDateTime)
                {
                    var actualPublishedDateTime = (DateTime)actualPropertyValues[i].PublishedValue;
                    AssertDateTime(
                        expectedPublishDateTime,
                        actualPublishedDateTime,
                        $"{property.DeclaringType.Name}.{property.Name}: Expected published value \"{expectedPropertyValues[i].PublishedValue}\" but got \"{actualPropertyValues[i].PublishedValue}\".",
                        dateDeltaMilliseconds);
                }
                else
                {
                    Assert.AreEqual(
                        expectedPropertyValues[i].PublishedValue,
                        actualPropertyValues[i].PublishedValue,
                        $"{property.DeclaringType.Name}.{property.Name}: Expected published value \"{expectedPropertyValues[i].PublishedValue}\" but got \"{actualPropertyValues[i].PublishedValue}\".");
                }
            }
        }
        else if (expected is IDataEditor expectedEditor)
        {
            Assert.IsInstanceOf<IDataEditor>(actual);
            var actualEditor = (IDataEditor)actual;
            Assert.AreEqual(expectedEditor.Alias, actualEditor.Alias);

            // what else shall we test?
        }
        else
        {
            // directly compare values
            Assert.AreEqual(
                expected,
                actual,
                "Property {0}.{1} does not match. Expected: {2} but was: {3}",
                property.DeclaringType.Name,
                property.Name,
                expected?.ToString() ?? "<null>",
                actual?.ToString() ?? "<null>");
        }
    }

    private static void AssertDateTime(DateTime expected, DateTime actual, string failureMessage, int dateDeltaMiliseconds = 0)
    {
        var delta = (actual - expected).TotalMilliseconds;
        Assert.IsTrue(Math.Abs(delta) <= dateDeltaMiliseconds, failureMessage);
    }

    public void DeleteDirectory(string path)
    {
        Try(() =>
        {
            if (Directory.Exists(path) == false)
            {
                return;
            }

            foreach (var file in Directory.EnumerateFiles(path, "*", SearchOption.AllDirectories))
            {
                File.Delete(file);
            }
        });

        Try(() =>
        {
            if (Directory.Exists(path) == false)
            {
                return;
            }

            Directory.Delete(path, true);
        });
    }

    public static void TryAssert(Action action, int maxTries = 5, int waitMilliseconds = 200) =>
        Try<AssertionException>(action, maxTries, waitMilliseconds);

    public static void Try(Action action, int maxTries = 5, int waitMilliseconds = 200) =>
        Try<Exception>(action, maxTries, waitMilliseconds);

    public static void Try<T>(Action action, int maxTries = 5, int waitMilliseconds = 200)
        where T : Exception
    {
        var tries = 0;
        while (true)
        {
            try
            {
                action();
                break;
            }
            catch (T)
            {
                if (tries++ > maxTries)
                {
                    throw;
                }

                Thread.Sleep(waitMilliseconds);
            }
        }
    }
}