using ElectricalRepairServiceContract.DataModels;
using ElectricalRepairServiceContract.Exceptions;
using NUnit.Framework;
using System;

namespace ElectricalRepairServiceTests.DataModelsTests
{
    [TestFixture]
    internal class EmploeeDataModelTest
    {
        [Test]
        public void IdIsNullOrEmptyTest()
        {
            var employee = CreateDataModel(null, "ValidName", Guid.NewGuid().ToString());
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());

            employee = CreateDataModel(string.Empty, "ValidName", Guid.NewGuid().ToString());
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
        }

        [Test]
        public void IdIsNotGuidTest()
        {
            var employee = CreateDataModel("invalid-id", "ValidName", Guid.NewGuid().ToString());
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
        }

        [Test]
        public void NameIsNullOrEmptyTest()
        {
            var employee = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString());
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());

            employee = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString());
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
        }

        [Test]
        public void PostIdIsNullOrEmptyTest()
        {
            var employee = CreateDataModel(Guid.NewGuid().ToString(), "ValidName", null);
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());

            employee = CreateDataModel(Guid.NewGuid().ToString(), "ValidName", string.Empty);
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
        }

        [Test]
        public void PostIdIsNotGuidTest()
        {
            var employee = CreateDataModel(Guid.NewGuid().ToString(), "ValidName", "invalid-post-id");
            Assert.That(() => employee.Validate(), Throws.TypeOf<ValidationException>());
        }

        [Test]
        public void AllFieldsCorrectTest()
        {
            var id = Guid.NewGuid().ToString();
            var name = "ValidName";
            var postId = Guid.NewGuid().ToString();

            var employee = CreateDataModel(id, name, postId);

            Assert.That(employee.Id, Is.EqualTo(id));
            Assert.That(employee.Name, Is.EqualTo(name));
            Assert.That(employee.PostId, Is.EqualTo(postId));
        }

        private EmploeeDataModel CreateDataModel(string id, string name, string postId)
            => new EmploeeDataModel(id, name, postId);
    }
}