using System;
using System.Linq.Expressions;
using System.Threading;
using AutoFixture;
using CoreUnitTests.Infrastructure;
using CoreUnitTests.Infrastructure.Model;
using FluentAssertions;
using MongoDB.Driver;
using MongoDbGenericRepository;
using MongoDbGenericRepository.DataAccess.Delete;
using Moq;
using Xunit;

namespace CoreUnitTests.DataAccessTests.MongoDbEraserTests;

public class DeleteOneTests : GenericTestContext<MongoDbEraser>
{
    [Fact]
    public void WithDocument_DeletesOne()
    {
        // Arrange
        var count = Fixture.Create<long>();
        var document = Fixture.Create<TestDocument>();
        var collection = MockOf<IMongoCollection<TestDocument>>();

        collection
            .Setup(x => x.DeleteOne(It.IsAny<FilterDefinition<TestDocument>>(), It.IsAny<CancellationToken>()))
            .Returns(new DeleteResult.Acknowledged(count));

        var dbContext = MockOf<IMongoDbContext>();
        dbContext
            .Setup(x => x.GetCollection<TestDocument>(null))
            .Returns(Fixture.Create<IMongoCollection<TestDocument>>());

        // Act
        var result = Sut.DeleteOne<TestDocument, Guid>(document);

        // Assert
        result.Should().Be(count);

        var expectedFilter = Builders<TestDocument>.Filter.Eq("Id", document.Id);
        collection.Verify(
            x => x.DeleteOne(
                It.Is<FilterDefinition<TestDocument>>(f => f.EquivalentTo(expectedFilter)),
                CancellationToken.None));
    }

    [Fact]
    public void WithDocumentAndCancellationToken_DeletesOne()
    {
        // Arrange
        var count = Fixture.Create<long>();
        var document = Fixture.Create<TestDocument>();
        var token = new CancellationToken(true);

        var collection = MockOf<IMongoCollection<TestDocument>>();
        collection
            .Setup(x => x.DeleteOne(It.IsAny<FilterDefinition<TestDocument>>(), It.IsAny<CancellationToken>()))
            .Returns(new DeleteResult.Acknowledged(count));

        var dbContext = MockOf<IMongoDbContext>();
        dbContext
            .Setup(x => x.GetCollection<TestDocument>(null))
            .Returns(Fixture.Create<IMongoCollection<TestDocument>>());

        // Act
        var result = Sut.DeleteOne<TestDocument, Guid>(document, token);

        // Assert
        result.Should().Be(count);

        var expectedFilter = Builders<TestDocument>.Filter.Eq("Id", document.Id);
        collection.Verify(
            x => x.DeleteOne(
                It.Is<FilterDefinition<TestDocument>>(f => f.EquivalentTo(expectedFilter)),
                token));
    }

    [Fact]
    public void WithFilter_DeletesOne()
    {
        // Arrange
        var count = Fixture.Create<long>();
        var document = Fixture.Create<TestDocument>();

        var collection = MockOf<IMongoCollection<TestDocument>>();
        collection
            .Setup(x => x.DeleteOne(It.IsAny<FilterDefinition<TestDocument>>(), It.IsAny<CancellationToken>()))
            .Returns(new DeleteResult.Acknowledged(count));

        var dbContext = MockOf<IMongoDbContext>();
        dbContext
            .Setup(x => x.GetCollection<TestDocument>(null))
            .Returns(Fixture.Create<IMongoCollection<TestDocument>>());

        Expression<Func<TestDocument, bool>> filter = d => d.SomeContent == document.SomeContent;

        // Act
        var result = Sut.DeleteOne<TestDocument, Guid>(filter);

        // Assert
        result.Should().Be(count);
        collection.Verify(
            x => x.DeleteOne(
            It.Is<FilterDefinition<TestDocument>>(f => f.EquivalentTo(filter)), CancellationToken.None));
    }

    [Fact]
    public void WithFilterAndCancellationToken_DeletesOne()
    {
        // Arrange
        var count = Fixture.Create<long>();
        var document = Fixture.Create<TestDocument>();
        var token = new CancellationToken(true);

        var collection = MockOf<IMongoCollection<TestDocument>>();
        collection
            .Setup(x => x.DeleteOne(It.IsAny<FilterDefinition<TestDocument>>(), It.IsAny<CancellationToken>()))
            .Returns(new DeleteResult.Acknowledged(count));

        var dbContext = MockOf<IMongoDbContext>();
        dbContext
            .Setup(x => x.GetCollection<TestDocument>(null))
            .Returns(Fixture.Create<IMongoCollection<TestDocument>>());

        Expression<Func<TestDocument, bool>> filter = d => d.Id == document.Id;

        // Act
        var result = Sut.DeleteOne<TestDocument, Guid>(filter, cancellationToken: token);

        // Assert
        result.Should().Be(count);
        collection.Verify(
            x => x.DeleteOne(
                It.Is<FilterDefinition<TestDocument>>(f => f.EquivalentTo(filter)), token));
    }

    [Fact]
    public void WithFilterAndPartitionKey_DeletesOne()
    {
        // Arrange
        var count = Fixture.Create<long>();
        var document = Fixture.Create<TestDocument>();
        var partitionKey = Fixture.Create<string>();

        var collection = MockOf<IMongoCollection<TestDocument>>();
        collection
            .Setup(x => x.DeleteOne(It.IsAny<FilterDefinition<TestDocument>>(), It.IsAny<CancellationToken>()))
            .Returns(new DeleteResult.Acknowledged(count));

        var dbContext = MockOf<IMongoDbContext>();
        dbContext
            .Setup(x => x.GetCollection<TestDocument>(It.IsAny<string>()))
            .Returns(Fixture.Create<IMongoCollection<TestDocument>>());

        Expression<Func<TestDocument, bool>> filter = d => d.Id == document.Id;

        // Act
        var result = Sut.DeleteOne<TestDocument, Guid>(filter, partitionKey);

        // Assert
        result.Should().Be(count);
        collection.Verify(
            x => x.DeleteOne(
                It.Is<FilterDefinition<TestDocument>>(f => f.EquivalentTo(filter)), CancellationToken.None));

        dbContext.Verify(x => x.GetCollection<TestDocument>(partitionKey));
    }

    [Fact]
    public void WithFilterAndPartitionKeyAndCancellationToken_DeletesOne()
    {
        // Arrange
        var count = Fixture.Create<long>();
        var document = Fixture.Create<TestDocument>();
        var partitionKey = Fixture.Create<string>();
        var token = new CancellationToken(true);

        var collection = MockOf<IMongoCollection<TestDocument>>();
        collection
            .Setup(x => x.DeleteOne(It.IsAny<FilterDefinition<TestDocument>>(), It.IsAny<CancellationToken>()))
            .Returns(new DeleteResult.Acknowledged(count));

        var dbContext = MockOf<IMongoDbContext>();
        dbContext
            .Setup(x => x.GetCollection<TestDocument>(It.IsAny<string>()))
            .Returns(Fixture.Create<IMongoCollection<TestDocument>>());

        Expression<Func<TestDocument, bool>> filter = d => d.Id == document.Id;

        // Act
        var result = Sut.DeleteOne<TestDocument, Guid>(filter, partitionKey, token);

        // Assert
        result.Should().Be(count);
        collection.Verify(
            x => x.DeleteOne(
                It.Is<FilterDefinition<TestDocument>>(f => f.EquivalentTo(filter)), token));

        dbContext.Verify(x => x.GetCollection<TestDocument>(partitionKey));
    }
}