using Moq;
using NUnit.Framework;
using PapaCarloBusinessLogic.Implementations;
using PapaCarloContracts.BusinessLogicContracts;
using PapaCarloContracts.DataModels;
using PapaCarloContracts.Exceptions;
using PapaCarloContracts.StoragesContracts;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PapaCarloTests.BusinessLogicsContracts;

[TestFixture]
internal class BlankBusinessLogicContractTests
{
    private IBlankBusinessLogicContract _blankBusinessLogicContract;
    private Mock<IBlankStorageContract> _blankStorageContract;

    [OneTimeSetUp]
    public void OneTimeSetUp()
    {
        _blankStorageContract = new Mock<IBlankStorageContract>();
        _blankBusinessLogicContract = new BlankBusinessLogicContract(_blankStorageContract.Object);
    }

    [SetUp]
    public void SetUp()
    {
        _blankStorageContract.Reset();
    }

    [Test]
    public void GetAllBlanks_ReturnListOfRecords_Test()
    {
        var listOriginal = new List<BlankDataModel>()
        {
            new(Guid.NewGuid().ToString(),"Mahogany","",""),
             new(Guid.NewGuid().ToString(),"Birch","",""),
              new(Guid.NewGuid().ToString(),"Spruce","","")
        };

        _blankStorageContract.Setup(x=> x.GetList()).Returns(listOriginal);

        var list = _blankBusinessLogicContract.GetAllBlanks();

        Assert.That(list, Is.Not.Null);
        Assert.That(list, Is.EquivalentTo(listOriginal));
    }

    [Test]
    public void GetAllBlanks_ReturnEmptyList_Test()
    {
        

        _blankStorageContract.Setup(x => x.GetList()).Returns([]);

        var list = _blankBusinessLogicContract.GetAllBlanks();

        Assert.That(list, Is.Not.Null);
        Assert.That(list, Has.Count.EqualTo(0));
        _blankStorageContract.Verify(x => x.GetList(), Times.Once);
    }

    [Test]
    public void GetAllBlanks_ReturnNull_ThrowException_Test()
    { 
        Assert.That(() => _blankBusinessLogicContract.GetAllBlanks(), Throws.TypeOf<NullListException>());
        _blankStorageContract.Verify(x => x.GetList(), Times.Once);
    }

    [Test]
    public void GetAllBlanks_StorageThrowError_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.GetList()).Throws(new StorageException(new InvalidOperationException()));

        Assert.That(() => _blankBusinessLogicContract.GetAllBlanks(), Throws.TypeOf<StorageException>());
        _blankStorageContract.Verify(x => x.GetList(), Times.Once);
    }

    [Test]
    public void GetBlankByData_GetById_ReturnRecord_Test()
    {
        var id = Guid.NewGuid().ToString();
        var record = new BlankDataModel(id, "Spruce", "", "");
        _blankStorageContract.Setup(x => x.GetElementById(id)).Returns(record);

        var element = _blankBusinessLogicContract.GetBlankByData(id);

        Assert.That(element, Is.Not.Null);
        Assert.That(element.Id, Is.EqualTo(id));
        _blankStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
    }

    [Test]
    public void GetBlankByData_GetByName_ReturnRecord_Test()
    {
        var name = "Spruce";
        var record = new BlankDataModel(Guid.NewGuid().ToString(), name, "", "");
        _blankStorageContract.Setup(x => x.GetElementByName(name)).Returns(record);

        var element = _blankBusinessLogicContract.GetBlankByData(name);

        Assert.That(element, Is.Not.Null);
        Assert.That(element.BlankName, Is.EqualTo(name));
        _blankStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
    }

    public void GetBlankByData_GetByOldName_ReturnRecord_Test()
    {
        var oldName = "Spruce";
        var record = new BlankDataModel(Guid.NewGuid().ToString(), "Birch", oldName, "");
        _blankStorageContract.Setup(x => x.GetElementByOldName(oldName)).Returns(record);

        var element = _blankBusinessLogicContract.GetBlankByData(oldName);

        Assert.That(element, Is.Not.Null);
        Assert.That(element.PrevBlankName, Is.EqualTo(oldName));
        _blankStorageContract.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Once);
    }

    [Test]
    public void GetBlankByData_EmptyData_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.GetBlankByData(null), Throws.TypeOf<ArgumentNullException>());
        Assert.That(() => _blankBusinessLogicContract.GetBlankByData(String.Empty), Throws.TypeOf<ArgumentNullException>());

        _blankStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
        _blankStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
        _blankStorageContract.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Never);
    }

    [Test]
    public void GetBlankByData_GetById_NotFoundRecord_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.GetBlankByData(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
        _blankStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
        _blankStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Never);
        _blankStorageContract.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Never);
    }

    [Test]
    public void GetBlankByData_GetByName_NotFoundRecord_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.GetBlankByData("Name"), Throws.TypeOf<ElementNotFoundException>());
        _blankStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Never);
        _blankStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
        _blankStorageContract.Verify(x => x.GetElementByOldName(It.IsAny<string>()), Times.Never);
    }
    [Test]
    public void GetBlankByData_StorageThrowError_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.GetElementById(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));
        _blankStorageContract.Setup(x => x.GetElementByName(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));

        Assert.That(() => _blankBusinessLogicContract.GetBlankByData(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
        Assert.That(() => _blankBusinessLogicContract.GetBlankByData("Name"), Throws.TypeOf<StorageException>());

        _blankStorageContract.Verify(x => x.GetElementById(It.IsAny<string>()), Times.Once);
        _blankStorageContract.Verify(x => x.GetElementByName(It.IsAny<string>()), Times.Once);
    }

    [Test]
    public void InsertBlank_CorrectRecord_Test()
    {
        var flag = false;
        var record = new BlankDataModel(Guid.NewGuid().ToString(), "Spruce", "", "");
        _blankStorageContract.Setup(x => x.AddElement(It.IsAny<BlankDataModel>()))
            .Callback((BlankDataModel x) =>
            {
                flag = x.Id == record.Id && x.BlankName == record.BlankName;
            });
        _blankBusinessLogicContract.InsertBlank(record);

        _blankStorageContract.Verify(x => x.AddElement(It.IsAny<BlankDataModel>()), Times.Once);
        Assert.That(flag);
    }

    [Test]
    public void InsertBlank_RecordWithExistData_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.AddElement(It.IsAny<BlankDataModel>())).Throws(new ElementExistsException("Data", "Data"));

        Assert.That(() => _blankBusinessLogicContract.InsertBlank(new(Guid.NewGuid().ToString(), "Spruce", "", "")), Throws.TypeOf<ElementExistsException>());
        _blankStorageContract.Verify(x => x.AddElement(It.IsAny<BlankDataModel>()), Times.Once);
    }

    [Test]
    public void InsertBlank_NullRecord_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.InsertBlank(null), Throws.TypeOf<ArgumentNullException>());
        _blankStorageContract.Verify(x => x.AddElement(It.IsAny<BlankDataModel>()), Times.Never);
    }

    [Test]
    public void InsertBlank_InvalidRecord_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.InsertBlank(new BlankDataModel("id", "name", "", "")), Throws.TypeOf<ValidationException>());
        _blankStorageContract.Verify(x => x.AddElement(It.IsAny<BlankDataModel>()), Times.Never);
    }
    [Test]
    public void InsertBlank_StorageThrowError_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.AddElement(It.IsAny<BlankDataModel>())).Throws(new StorageException(new InvalidOperationException()));

        Assert.That(() => _blankBusinessLogicContract.InsertBlank(new(Guid.NewGuid().ToString(), "Spruce", "", "")), Throws.TypeOf<StorageException>());
        _blankStorageContract.Verify(x => x.AddElement(It.IsAny<BlankDataModel>()), Times.Once);
    }
    [Test]
    public void UpdateBlank_RecordWithIncorrectData_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.UpdElement(It.IsAny<BlankDataModel>())).Throws(new ElementNotFoundException(""));

        Assert.That(() => _blankBusinessLogicContract.UpdateBlank(new(Guid.NewGuid().ToString(), "Spruce", "", "")), Throws.TypeOf<ElementNotFoundException>());
        _blankStorageContract.Verify(x => x.UpdElement(It.IsAny<BlankDataModel>()), Times.Once);
    }
    [Test]
    public void UpdateBlank_RecordWithExistData_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.UpdElement(It.IsAny<BlankDataModel>())).Throws(new ElementExistsException("Data","Data"));

        Assert.That(() => _blankBusinessLogicContract.UpdateBlank(new(Guid.NewGuid().ToString(), "Spruce", "", "")), Throws.TypeOf<ElementNotFoundException>());
        _blankStorageContract.Verify(x => x.UpdElement(It.IsAny<BlankDataModel>()), Times.Once);
    }
    [Test]
    public void UpdateBlank_NullRecord_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.UpdateBlank(null), Throws.TypeOf<ArgumentNullException>());
        _blankStorageContract.Verify(x => x.UpdElement(It.IsAny<BlankDataModel>()), Times.Never);
    }
    [Test]
    public void UpdateBlank_InvalidRecord_ThrowException_Test()
    {

        Assert.That(() => _blankBusinessLogicContract.UpdateBlank(new("id", "Spruce", "", "")), Throws.TypeOf<ValidationException>());
        _blankStorageContract.Verify(x => x.UpdElement(It.IsAny<BlankDataModel>()), Times.Never);
    }
    [Test]
    public void DeleteBlank_CorrectRecord_Test()
    {
        var id = Guid.NewGuid().ToString();
        var flag = false;
        _blankStorageContract.Setup(x => x.DelElement(It.Is((string x) => x == id))).Callback(() => { flag = true; });

        _blankBusinessLogicContract.DeleteBlank(id);

        _blankStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
        Assert.That(flag);
    }
    [Test]
    public void DeleteBlank_RecordWithIncorrectId_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new ElementNotFoundException(""));

        Assert.That(() => _blankBusinessLogicContract.DeleteBlank(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
        _blankStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
    }
    [Test]
    public void DeleteBlank_IdIsNullOrEmpty_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.DeleteBlank(null), Throws.TypeOf<ArgumentNullException>());
        Assert.That(() => _blankBusinessLogicContract.DeleteBlank(string.Empty), Throws.TypeOf<ArgumentNullException>());
        _blankStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
    }
    [Test]
    public void DeleteBlank_IdIsNotGuid_ThrowException_Test()
    {
        Assert.That(() => _blankBusinessLogicContract.DeleteBlank("id"), Throws.TypeOf<ValidationException>());
        _blankStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Never);
    }
    [Test]
    public void DeleteBlank_StorageThrowError_ThrowException_Test()
    {
        _blankStorageContract.Setup(x => x.DelElement(It.IsAny<string>())).Throws(new StorageException(new InvalidOperationException()));

        Assert.That(() => _blankBusinessLogicContract.DeleteBlank(Guid.NewGuid().ToString()), Throws.TypeOf<StorageException>());
        _blankStorageContract.Verify(x => x.DelElement(It.IsAny<string>()), Times.Once);
    }



}