using System;
using Abc.Zebus.Routing;
using Abc.Zebus.Testing.Extensions;
using Abc.Zebus.Testing.Measurements;
using Abc.Zebus.Tests.Messages;
using NUnit.Framework;

namespace Abc.Zebus.Tests
{
    [TestFixture]
    public partial class SubscriptionTests
    {
        [SetUp]
        public void Setup()
        {
            _field = Environment.TickCount;
        }

        private int _field;

        [TestCase("whatever")]
        [TestCase("*")]
        [TestCase("#")]
        public void single_star_should_always_match(string routingKey)
        {
            var subscription = CreateSubscription("*");
            subscription.Matches(BindingKey.Split(routingKey)).ShouldBeTrue();
        }

        [TestCase("whatever")]
        [TestCase("*")]
        [TestCase("#")]
        public void single_dash_should_always_match(string routingKey)
        {
            var subscription = CreateSubscription("#");
            subscription.Matches(BindingKey.Split(routingKey)).ShouldBeTrue();
        }

        [TestCase("whatever")]
        [TestCase("*")]
        [TestCase("#")]
        public void empty_bindingkey_should_always_match(string routingKey)
        {
            var subscription = new Subscription(new MessageTypeId(typeof(FakeCommand)), BindingKey.Empty);
            subscription.Matches(BindingKey.Split(routingKey)).ShouldBeTrue();
        }

        [TestCase("a.b.c")]
        [TestCase("b.c.d")]
        public void stars_should_always_match_if_same_number_of_parts(string routingKey)
        {
            var subscription = CreateSubscription("*.*.*");
            subscription.Matches(BindingKey.Split(routingKey)).ShouldBeTrue();
        }

        [TestCase("a.b.*")]
        [TestCase("a.*.*")]
        [TestCase("a.*.c")]
        [TestCase("*.b.c")]
        public void binding_key_with_star_should_match_routing_key(string bindingKey)
        {
            var subscription = CreateSubscription(bindingKey);
            subscription.Matches(BindingKey.Split("a.b.c")).ShouldBeTrue();
        }

        [TestCase("a.b.#")]
        [TestCase("a.#")]
        public void binding_key_with_dashr_should_match_routing_key(string bindingKey)
        {
            var subscription = CreateSubscription(bindingKey);
            subscription.Matches(BindingKey.Split("a.b.c")).ShouldBeTrue();
        }

        [TestCase("a.b", "a.b.c.d")]
        [TestCase("d.*", "a.b.c.d")]
        [TestCase("d.#", "a.b.c.d")]
        public void should_not_match_binding_key(string routingKey, string bindingKey)
        {
            var subscription = CreateSubscription(bindingKey);
            subscription.Matches(BindingKey.Split(routingKey)).ShouldBeFalse();
        }

        [Test]
        public void exact_same_routing_key_should_match_binding_key()
        {
            var subscription = CreateSubscription("a.b.c");
            subscription.Matches(BindingKey.Split("a.b.c")).ShouldBeTrue();
        }

        [Test]
        public void should_create_subscription_by_example()
        {
            var subscription = Subscription.ByExample(x => new FakeRoutableCommand(12, "name"));
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(BindingKey.Split("12.name.*"));
        }

        [Test]
        public void should_create_subscription_by_example_with_field()
        {
            var subscription = Subscription.ByExample(x => new FakeRoutableCommand(_field, "name"));
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(new BindingKey(_field.ToString(), "name", "*"));
        }

        [Test]
        public void should_create_subscription_by_example_with_method()
        {
            var subscription = Subscription.ByExample(x => new FakeRoutableCommand(GetFieldValue(), "name"));
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(new BindingKey(_field.ToString(), "name", "*"));
        }

        [Test]
        public void should_create_subscription_by_example_with_placeholder()
        {
            var subscription = Subscription.ByExample(x => new FakeRoutableCommand(x.Any<decimal>(), "name"));
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(BindingKey.Split("*.name.*"));
        }

        [Test]
        public void should_create_subscription_by_example_with_variable()
        {
            var value = Environment.TickCount;
            var subscription = Subscription.ByExample(x => new FakeRoutableCommand(value, "name"));
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(new BindingKey(value.ToString(), "name", "*"));
        }

        [Test]
        public void should_create_subscription_from_complex_predicate()
        {
            var otherId = Guid.NewGuid();

            var subscription = Subscription.Matching<FakeRoutableCommand>(x => x.Id == 12 && x.OtherId == otherId && x.Name == "name");
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(new BindingKey("12", "name", otherId.ToString()));
        }

        [Test]
        public void should_create_subscription_from_predicate_with_unary_expressions()
        {
            var subscription = Subscription.Matching<FakeRoutableCommandWithBoolean>(x => !x.IsAMatch);
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommandWithBoolean)));
            subscription.BindingKey.ShouldEqual(new BindingKey("False"));

            subscription = Subscription.Matching<FakeRoutableCommandWithBoolean>(x => x.IsAMatch);
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommandWithBoolean)));
            subscription.BindingKey.ShouldEqual(new BindingKey("True"));
            
            subscription = Subscription.Matching<FakeRoutableCommandWithBoolean>(x => !(!x.IsAMatch));
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommandWithBoolean)));
            subscription.BindingKey.ShouldEqual(new BindingKey("True"));
        }

        [Test]
        public void should_create_subscription_from_predicate_with_enum()
        {
            var subscription = Subscription.Matching<FakeRoutableCommandWithEnum>(x => x.Test1 == TestEnum1.Bar);
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommandWithEnum)));
            subscription.BindingKey.ShouldEqual(new BindingKey(TestEnum1.Bar.ToString(), "*"));
        }
        
        [Test]
        public void should_create_subscription_from_inversed_predicate_with_enum()
        {
            var subscription = Subscription.Matching<FakeRoutableCommandWithEnum>(x => TestEnum1.Bar == x.Test1);
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommandWithEnum)));
            subscription.BindingKey.ShouldEqual(new BindingKey(TestEnum1.Bar.ToString(), "*"));
        }

        [Test]
        public void should_create_subscription_from_complex_predicate_with_enum()
        {
            var subscription = Subscription.Matching<FakeRoutableCommandWithEnum>(x => x.Test1 == TestEnum1.Bar && x.Test2 == TestEnum2.Buz);
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommandWithEnum)));
            subscription.BindingKey.ShouldEqual(new BindingKey(TestEnum1.Bar.ToString(), TestEnum2.Buz.ToString()));
        }

        [Test]
        public void should_create_subscription_from_simple_predicate()
        {
            var subscription = Subscription.Matching<FakeRoutableCommand>(x => x.Id == GetFieldValue());
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(new BindingKey(GetFieldValue().ToString(), "*", "*"));
        }
        
        [Test]
        public void should_create_subscription_from_simple_predicate_in_generic_context()
        {
            var subscription = CreateSubscription<FakeRoutableCommand>();
            subscription.MessageTypeId.ShouldEqual(new MessageTypeId(typeof(FakeRoutableCommand)));
            subscription.BindingKey.ShouldEqual(new BindingKey(GetFieldValue().ToString(), "*", "*"));
        }

        private Subscription CreateSubscription<TMessage>()
            where TMessage : FakeRoutableCommand
        {
            return Subscription.Matching<TMessage>(x => x.Id == GetFieldValue());
        }

        [Test]
        public void should_be_equatable()
        {
            var otherId = Guid.NewGuid();

            var subscription1 = Subscription.Matching<FakeRoutableCommand>(x => x.Id == 12 && x.OtherId == otherId);
            var subscription2 = Subscription.Matching<FakeRoutableCommand>(x => x.Id == 12 && x.OtherId == otherId);

            subscription1.GetHashCode().ShouldEqual(subscription2.GetHashCode());
            subscription1.Equals(subscription2).ShouldBeTrue();
            subscription1.Equals((object)subscription2).ShouldBeTrue();
        }

        [Test]
        [Ignore]
        [Category("ManualOnly")]
        [TestCase("a.b", "a.b.c.d")]
        [TestCase("d.*", "a.b.c.d")]
        [TestCase("d.#", "a.b.c.d")]
        public void MeasurePerformance(string routingKey, string bindingKey)
        {
            var subscription = CreateSubscription(bindingKey);
            var key = BindingKey.Split(routingKey);

            Measure.Execution(x =>
            {
                x.Iteration = 1000000;
                x.WarmUpIteration = 1000;
                x.Action = _ => subscription.Matches(key);
            });
        }

        private Subscription CreateSubscription(string bindingKey)
        {
            return new Subscription(new MessageTypeId(typeof(FakeCommand)), BindingKey.Split(bindingKey));
        }

        private int GetFieldValue()
        {
            return _field;
        }
    }
}