using System;
using System.Collections.Generic;
using NUnit.Framework;
using ShareeBike.Model.State;


namespace SharedBusinessLogic.Tests
{

	[TestFixture]
	public class TestStateRequestedInfo
	{
		[Test]
		public void TestConstruct_FromApp()
		{
			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20, 12, 1, 0), new DateTime(2017, 09, 20, 12, 0, 0), TimeSpan.FromMinutes(15), "a@b", null).Value, Is.EqualTo(InUseStateEnum.Reserved));

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20, 12, 1, 0), new DateTime(2017, 09, 20, 12, 0, 0), TimeSpan.FromMinutes(15), "a@b", null).MailAddress, Is.EqualTo("a@b"));

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20, 12, 1, 0), new DateTime(2017, 09, 20, 12, 0, 0), TimeSpan.FromMinutes(15), "a@b", null).Code, Is.Null);

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20, 12, 1, 0), new DateTime(2017, 09, 20, 12, 0, 0), TimeSpan.FromMinutes(15), "a@b", null).From, Is.EqualTo(new DateTime(2017, 09, 20, 12, 0, 0)));

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20, 12, 1, 0), new DateTime(2017, 09, 20, 12, 0, 0), TimeSpan.FromMinutes(15), "a@b", null).GetIsStillReserved(out TimeSpan? l_oRemainigTime), Is.True);

			Assert.That(
				l_oRemainigTime.Value.Minutes, Is.EqualTo(14));
		}

		[Test]
		public void TestConstruct_FromWebserver()
		{
			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20), new DateTime(2017, 09, 19), TimeSpan.FromMinutes(15), "a@b", "372").Value, Is.EqualTo(InUseStateEnum.Reserved));

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20), new DateTime(2017, 09, 19), TimeSpan.FromMinutes(15), "a@b", "372").MailAddress, Is.EqualTo("a@b"));

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20), new DateTime(2017, 09, 19), TimeSpan.FromMinutes(15), "a@b", "372").Code, Is.EqualTo("372"));

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20), new DateTime(2017, 09, 19), TimeSpan.FromMinutes(15), "a@b", "372").From, Is.EqualTo(new DateTime(2017, 09, 19)));

			Assert.That(
				new StateRequestedInfo(() => new DateTime(2017, 09, 20, 12, 12, 0), new DateTime(2017, 09, 20, 12, 0, 0), TimeSpan.FromMinutes(15), "a@b", "372").GetIsStillReserved(out TimeSpan? remainingTime), Is.True);

			Assert.That(
				remainingTime.Value.Minutes, Is.EqualTo(3));
		}

		[Test]
		public void TestTryUpdateOnTimeElapsed()
		{
			var l_oReservedAt = new DateTime(2017, 09, 20, 22, 01, 00);
			var l_oDateTimeMock = new DateTimeMocker(new List<DateTime> {
				l_oReservedAt.Add(new TimeSpan(0, 4, 0)),    // Reserved for 4 mns
                l_oReservedAt.Add(new TimeSpan(0, 16, 0))   // Time elapsed since booking 16 mns
                });

			var l_oReservedInfo = new StateRequestedInfo(l_oDateTimeMock.GetDateTime, l_oReservedAt, TimeSpan.FromMinutes(15), "a@b", null);
			Assert.That(l_oReservedInfo.MailAddress, Is.EqualTo("a@b"));
			Assert.That(l_oReservedInfo.From, Is.EqualTo(new DateTime(2017, 09, 20, 22, 01, 00)), "a@b");

			// Invoke first update (after simulated 4mns)
			Assert.That(l_oReservedInfo.GetIsStillReserved(out TimeSpan? remainingTime), Is.True);
			Assert.That(remainingTime.Value.Minutes, Is.EqualTo(11));
			Assert.That(l_oReservedInfo.From, Is.EqualTo(new DateTime(2017, 09, 20, 22, 01, 00)), "a@b");

			// Invoke second update (after simulated 16 mns)
			Assert.That(l_oReservedInfo.GetIsStillReserved(out remainingTime), Is.False);
			Assert.That(remainingTime, Is.Null);
			Assert.That(l_oReservedInfo.From, Is.EqualTo(new DateTime(2017, 09, 20, 22, 01, 00)), "a@b");
		}

		[Test]
		public void TestReservationTimeSpanCtor() =>
			Assert.That(new StateRequestedInfo().MaxReservationTimeSpan, Is.EqualTo(TimeSpan.Zero));

		[Test]
		public void TestGetIsStillReserved() =>
			Assert.That(new StateRequestedInfo(
				() => new DateTime(2023, 5, 11, 14, 42, 0, 100), // one hundred millisecond after bike was reserved
				new DateTime(2023, 5, 11, 14, 42, 0, 0),
				TimeSpan.FromSeconds(1),
				"a@b",
				"").GetIsStillReserved(out _),
				Is.True);

		[Test]
		public void TestGetIsStillReservedExpired() =>
			Assert.That(new StateRequestedInfo(
				() => new DateTime(2023, 5, 11, 14, 42, 0, 100), // one hundred millisecond after bike was reserved
				new DateTime(2023, 5, 11, 14, 42, 0, 0),
				TimeSpan.FromMilliseconds(50),
				"a@b",
				"").GetIsStillReserved(out _),
				Is.False);

		[Test]
		public void TestGetIsStillReservedInvalidMaxReservationTimeSpan() =>
			Assert.That(new StateRequestedInfo(
				() => new DateTime(2023, 5, 11, 14, 42, 0, 1), // one hundred millisecond after bike was reserved
				new DateTime(2023, 5, 11, 14, 42, 0, 0),
				TimeSpan.Zero,
				"a@b",
				"").GetIsStillReserved(out _),
				Is.False);
	}
}