using MagicCarpetContracts.DataModels;
using MagicCarpetContracts.Exceptions;
using MagicCarpetDatabase.Implementations;
using MagicCarpetDatabase.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MagicCarpetTests.StoragesContracts;

[TestFixture]
class EmployeeStorageContractTests : BaseStorageContractTest
{
    private EmployeeStorageContract _employeeStorageContract;

    [SetUp]
    public void SetUp()
    {
        _employeeStorageContract = new EmployeeStorageContract(MagicCarpetDbContext);
    }

    [TearDown]
    public void TearDown()
    {
        MagicCarpetDbContext.Database.ExecuteSqlRaw("TRUNCATE \"Employees\"CASCADE; ");
    }

    [Test]
    public void Try_GetList_WhenHaveRecords_Test()
    {
        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1");
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2");
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3");
        var list = _employeeStorageContract.GetList();
        Assert.That(list, Is.Not.Null);
        Assert.That(list, Has.Count.EqualTo(3));
        AssertElement(list.First(), employee);
    }

    [Test]
    public void Try_GetList_WhenNoRecords_Test()
    {
        var list = _employeeStorageContract.GetList();
        Assert.That(list, Is.Not.Null);
        Assert.That(list, Is.Empty);
    }

    [Test]
    public void Try_GetList_ByPostId_Test()
    {
        var postId = Guid.NewGuid().ToString();
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", postId);
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", postId);
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3");
        var list = _employeeStorageContract.GetList(postId: postId);
        Assert.That(list, Is.Not.Null);
        Assert.That(list, Has.Count.EqualTo(2));
        Assert.That(list.All(x => x.PostId == postId));
    }

    [Test]
    public void Try_GetList_ByBirthDate_Test()
    {
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", birthDate: DateTime.UtcNow.AddYears(-25));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", birthDate: DateTime.UtcNow.AddYears(-21));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", birthDate: DateTime.UtcNow.AddYears(-20));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", birthDate: DateTime.UtcNow.AddYears(-19));
        var list = _employeeStorageContract.GetList(fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1));
        Assert.That(list, Is.Not.Null);
        Assert.That(list, Has.Count.EqualTo(2));
    }

    [Test]
    public void Try_GetList_ByEmploymentDate_Test()
    {
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", employmentDate: DateTime.UtcNow.AddDays(-2));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", employmentDate: DateTime.UtcNow.AddDays(-1));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", employmentDate: DateTime.UtcNow.AddDays(1));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", employmentDate: DateTime.UtcNow.AddDays(2));
        var list = _employeeStorageContract.GetList(fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
        Assert.That(list, Is.Not.Null);
        Assert.That(list, Has.Count.EqualTo(2));
    }

    [Test]
    public void Try_GetList_ByAllParameters_Test()
    {
        var postId = Guid.NewGuid().ToString();
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 1", postId,  birthDate: DateTime.UtcNow.AddYears(-25), employmentDate: DateTime.UtcNow.AddDays(-2));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 2", postId,  birthDate: DateTime.UtcNow.AddYears(-22), employmentDate: DateTime.UtcNow.AddDays(-1));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 3", postId,  birthDate: DateTime.UtcNow.AddYears(-21), employmentDate: DateTime.UtcNow.AddDays(-1));
        InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString(), "fio 4", birthDate: DateTime.UtcNow.AddYears(-20), employmentDate: DateTime.UtcNow.AddDays(1));
        var list = _employeeStorageContract.GetList(postId: postId, fromBirthDate: DateTime.UtcNow.AddYears(-21).AddMinutes(-1), toBirthDate: DateTime.UtcNow.AddYears(-20).AddMinutes(1), 
            fromEmploymentDate: DateTime.UtcNow.AddDays(-1).AddMinutes(-1), toEmploymentDate: DateTime.UtcNow.AddDays(1).AddMinutes(1));
        Assert.That(list, Is.Not.Null);
        Assert.That(list, Has.Count.EqualTo(1));
    }

    [Test]
    public void Try_GetElementById_WhenHaveRecord_Test()
    {
        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
        AssertElement(_employeeStorageContract.GetElementById(employee.Id), employee);
    }

    [Test]
    public void Try_GetElementById_WhenNoRecord_Test()
    {
        Assert.That(() => _employeeStorageContract.GetElementById(Guid.NewGuid().ToString()), Is.Null);
    }

    [Test]
    public void Try_GetElementByFIO_WhenHaveRecord_Test()
    {
        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
        AssertElement(_employeeStorageContract.GetElementByFIO(employee.FIO), employee);
    }

    [Test]
    public void Try_GetElementByFIO_WhenNoRecord_Test()
    {
        Assert.That(() => _employeeStorageContract.GetElementByFIO("New Fio"), Is.Null);
    }

    [Test]
    public void Try_AddElement_Test()
    {
        var employee = CreateModel(Guid.NewGuid().ToString());
        _employeeStorageContract.AddElement(employee);
        AssertElement(GetEmployeeFromDatabase(employee.Id), employee);
    }

    [Test]
    public void Try_AddElement_WhenHaveRecordWithSameId_Test()
    {
        var employee = CreateModel(Guid.NewGuid().ToString());
        InsertEmployeeToDatabaseAndReturn(employee.Id);
        Assert.That(() => _employeeStorageContract.AddElement(employee), Throws.TypeOf<ElementExistsException>());
    }

    [Test]
    public void Try_UpdElement_Test()
    {
        var employee = CreateModel(Guid.NewGuid().ToString(), "New Fio");
        InsertEmployeeToDatabaseAndReturn(employee.Id);
        _employeeStorageContract.UpdElement(employee);
        AssertElement(GetEmployeeFromDatabase(employee.Id), employee);
    }

    [Test]
    public void Try_UpdElement_WhenNoRecordWithThisId_Test()
    {
        Assert.That(() => _employeeStorageContract.UpdElement(CreateModel(Guid.NewGuid().ToString())), Throws.TypeOf<ElementNotFoundException>());
    }

    [Test]
    public void Try_UpdElement_WhenNoRecordWasDeleted_Test()
    {
        var employee = CreateModel(Guid.NewGuid().ToString());
        InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
        Assert.That(() => _employeeStorageContract.UpdElement(employee), Throws.TypeOf<ElementNotFoundException>());
    }

    [Test]
    public void Try_DelElement_Test()
    {
        var employee = InsertEmployeeToDatabaseAndReturn(Guid.NewGuid().ToString());
        _employeeStorageContract.DelElement(employee.Id);
        var element = GetEmployeeFromDatabase(employee.Id);
        Assert.That(element, Is.Not.Null);
        Assert.That(element.IsDeleted);
    }

    [Test]
    public void Try_DelElement_WhenNoRecordWithThisId_Test()
    {
        Assert.That(() => _employeeStorageContract.DelElement(Guid.NewGuid().ToString()), Throws.TypeOf<ElementNotFoundException>());
    }

    [Test]
    public void Try_DelElement_WhenNoRecordWasDeleted_Test()
    {
        var employee = CreateModel(Guid.NewGuid().ToString());
        InsertEmployeeToDatabaseAndReturn(employee.Id, isDeleted: true);
        Assert.That(() => _employeeStorageContract.DelElement(employee.Id), Throws.TypeOf<ElementNotFoundException>());
    }

    private Employee InsertEmployeeToDatabaseAndReturn(string id, string fio = "test", string? email = null,string ? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, bool isDeleted = false)
    {
        var employee = new Employee() { Id = id, FIO = fio, PostId = postId ?? Guid.NewGuid().ToString(), Email = email, BirthDate = birthDate ?? DateTime.UtcNow.AddYears(-20), EmploymentDate = employmentDate ?? DateTime.UtcNow, IsDeleted = isDeleted };
        MagicCarpetDbContext.Employees.Add(employee);
        MagicCarpetDbContext.SaveChanges();
        return employee;
    }

    private static void AssertElement(EmployeeDataModel? actual, Employee expected)
    {
        Assert.That(actual, Is.Not.Null);
        Assert.Multiple(() =>
        {
            Assert.That(actual.Id, Is.EqualTo(expected.Id));
            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
            Assert.That(actual.Email, Is.EqualTo(expected.Email));
            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
        });
    }

    private static EmployeeDataModel CreateModel(string id, string fio = "fio", string? postId = null, DateTime? birthDate = null, DateTime? employmentDate = null, string email = "email", bool isDeleted = false) =>
        new(id, fio, postId ?? Guid.NewGuid().ToString(), email, birthDate ?? DateTime.UtcNow.AddYears(-20), employmentDate ?? DateTime.UtcNow,  isDeleted);

    private Employee? GetEmployeeFromDatabase(string id) => MagicCarpetDbContext.Employees.FirstOrDefault(x => x.Id == id);

    private static void AssertElement(Employee? actual, EmployeeDataModel expected)
    {
        Assert.That(actual, Is.Not.Null);
        Assert.Multiple(() =>
        {
            Assert.That(actual.Id, Is.EqualTo(expected.Id));
            Assert.That(actual.PostId, Is.EqualTo(expected.PostId));
            Assert.That(actual.FIO, Is.EqualTo(expected.FIO));
            Assert.That(actual.Email, Is.EqualTo(expected.Email));
            Assert.That(actual.BirthDate, Is.EqualTo(expected.BirthDate));
            Assert.That(actual.EmploymentDate, Is.EqualTo(expected.EmploymentDate));
            Assert.That(actual.IsDeleted, Is.EqualTo(expected.IsDeleted));
        });
    }
}