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

using System.Collections.Generic;
using System.Globalization;
using System.Security.Claims;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Moq;
using NUnit.Framework;
using Umbraco.Cms.Core;
using Umbraco.Cms.Core.Cache;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.Models.Entities;
using Umbraco.Cms.Core.Models.Membership;
using Umbraco.Cms.Core.Persistence.Querying;
using Umbraco.Cms.Core.Security;
using Umbraco.Cms.Core.Services;
using Umbraco.Cms.Tests.Common.Builders;
using Umbraco.Cms.Web.BackOffice.Authorization;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Web.BackOffice.Authorization;

public class ContentPermissionsPublishBranchHandlerTests
{
    private const int NodeId = 1000;
    private const int DescendentNodeId1 = 1001;
    private const int DescendentNodeId2 = 1002;

    [Test]
    public async Task User_With_Access_To_All_Descendent_Nodes_Is_Authorized()
    {
        var authHandlerContext = CreateAuthorizationHandlerContext();
        var mockUserService = CreateMockUserService(
            NodeId,
            new Dictionary<int, string[]> { { DescendentNodeId1, new[] { "A" } }, { DescendentNodeId2, new[] { "A" } } });
        var sut = CreateHandler(mockUserService.Object, NodeId);

        await sut.HandleAsync(authHandlerContext);

        Assert.IsTrue(authHandlerContext.HasSucceeded);
        mockUserService.Verify(x => x.GetPermissionsForPath(It.IsAny<IUser>(), It.IsAny<string>()), Times.Exactly(2));
    }

    [Test]
    public async Task User_Without_Access_To_One_Descendent_Node_Is_Not_Authorized()
    {
        var authHandlerContext = CreateAuthorizationHandlerContext();
        var mockUserService = CreateMockUserService(
            NodeId,
            new Dictionary<int, string[]> { { DescendentNodeId1, new[] { "A" } }, { DescendentNodeId2, new[] { "B" } } });
        var sut = CreateHandler(mockUserService.Object, NodeId);

        await sut.HandleAsync(authHandlerContext);

        Assert.IsFalse(authHandlerContext.HasSucceeded);
        mockUserService.Verify(x => x.GetPermissionsForPath(It.IsAny<IUser>(), It.IsAny<string>()), Times.Exactly(2));
    }

    [Test]
    public async Task User_Without_Access_To_First_Descendent_Node_Is_Not_Authorized_And_Checks_Exit_Early()
    {
        var authHandlerContext = CreateAuthorizationHandlerContext();
        var mockUserService = CreateMockUserService(
            NodeId,
            new Dictionary<int, string[]> { { DescendentNodeId1, new[] { "B" } }, { DescendentNodeId2, new[] { "A" } } });
        var sut = CreateHandler(mockUserService.Object, NodeId);

        await sut.HandleAsync(authHandlerContext);

        Assert.IsFalse(authHandlerContext.HasSucceeded);
        mockUserService.Verify(x => x.GetPermissionsForPath(It.IsAny<IUser>(), It.IsAny<string>()), Times.Exactly(1));
    }

    private static AuthorizationHandlerContext CreateAuthorizationHandlerContext()
    {
        var requirement = new ContentPermissionsPublishBranchRequirement('A');
        var user = new ClaimsPrincipal(new ClaimsIdentity(new List<Claim>()));
        var resource = CreateContent(NodeId);
        return new AuthorizationHandlerContext(new List<IAuthorizationRequirement> { requirement }, user, resource);
    }

    private static Mock<IUserService> CreateMockUserService(
        int parentNodeId,
        Dictionary<int, string[]> descendendNodePermissionsForPath)
    {
        var mockUserService = new Mock<IUserService>();

        mockUserService
            .Setup(x => x.GetPermissionsForPath(
                It.IsAny<IUser>(),
                It.Is<string>(y =>
                    y ==
                    $"{Constants.System.RootString},{parentNodeId.ToString(CultureInfo.InvariantCulture)},{DescendentNodeId1}")))
            .Returns(new EntityPermissionSet(
                parentNodeId,
                new EntityPermissionCollection(new List<EntityPermission>
                {
                    new(1, parentNodeId, descendendNodePermissionsForPath[DescendentNodeId1]),
                })));
        mockUserService
            .Setup(x => x.GetPermissionsForPath(
                It.IsAny<IUser>(),
                It.Is<string>(y =>
                    y ==
                    $"{Constants.System.RootString},{parentNodeId.ToString(CultureInfo.InvariantCulture)},{DescendentNodeId1},{DescendentNodeId2}")))
            .Returns(new EntityPermissionSet(
                parentNodeId,
                new EntityPermissionCollection(new List<EntityPermission>
                {
                    new(1, parentNodeId, descendendNodePermissionsForPath[DescendentNodeId2]),
                })));

        return mockUserService;
    }

    private ContentPermissionsPublishBranchHandler CreateHandler(IUserService userService, int nodeId)
    {
        var mockEntityService = CreateMockEntityService();
        var contentPermissions = CreateContentPermissions(mockEntityService.Object, userService, nodeId);
        var mockBackOfficeSecurityAccessor = CreateMockBackOfficeSecurityAccessor();
        return new ContentPermissionsPublishBranchHandler(mockEntityService.Object, contentPermissions, mockBackOfficeSecurityAccessor.Object);
    }

    private static Mock<IEntityService> CreateMockEntityService()
    {
        long totalRecords;
        var mockEntityService = new Mock<IEntityService>();
        mockEntityService
            .Setup(x => x.GetPagedDescendants(
                It.Is<int>(y => y == NodeId),
                It.Is<UmbracoObjectTypes>(y => y == UmbracoObjectTypes.Document),
                It.IsAny<long>(),
                It.IsAny<int>(),
                out totalRecords,
                It.IsAny<IQuery<IUmbracoEntity>>(),
                It.IsAny<Ordering>()))
            .Returns(new List<IEntitySlim>
            {
                new EntitySlim { Id = DescendentNodeId1, Path = $"-1,{NodeId},{DescendentNodeId1}" },
                new EntitySlim
                {
                    Id = DescendentNodeId2, Path = $"-1,{NodeId},{DescendentNodeId1},{DescendentNodeId2}",
                },
            });
        return mockEntityService;
    }

    private static ContentPermissions CreateContentPermissions(IEntityService entityService, IUserService userService, int nodeId)
    {
        var mockContentService = new Mock<IContentService>();
        mockContentService
            .Setup(x => x.GetById(It.Is<int>(y => y == nodeId)))
            .Returns(CreateContent(nodeId));

        return new ContentPermissions(userService, mockContentService.Object, entityService, AppCaches.Disabled);
    }

    private static IContent CreateContent(int nodeId)
    {
        var contentType = ContentTypeBuilder.CreateBasicContentType();
        return ContentBuilder.CreateBasicContent(contentType, nodeId);
    }

    private static Mock<IBackOfficeSecurityAccessor> CreateMockBackOfficeSecurityAccessor()
    {
        var user = CreateUser();
        var mockBackOfficeSecurity = new Mock<IBackOfficeSecurity>();
        mockBackOfficeSecurity.SetupGet(x => x.CurrentUser).Returns(user);
        var mockBackOfficeSecurityAccessor = new Mock<IBackOfficeSecurityAccessor>();
        mockBackOfficeSecurityAccessor.Setup(x => x.BackOfficeSecurity).Returns(mockBackOfficeSecurity.Object);
        return mockBackOfficeSecurityAccessor;
    }

    private static User CreateUser() =>
        new UserBuilder()
            .Build();
}