using StellaOps.Microservice;
using StellaOps.Router.Common.Enums;
using Xunit;

namespace StellaOps.Microservice.Tests;

public class StellaMicroserviceOptionsTests
{
    [Fact]
    public void StellaMicroserviceOptions_CanBeCreated()
    {
        // Arrange & Act
        var options = new StellaMicroserviceOptions
        {
            ServiceName = "test-service",
            Version = "1.0.0",
            Region = "eu1"
        };

        // Assert
        Assert.Equal("test-service", options.ServiceName);
        Assert.Equal("1.0.0", options.Version);
        Assert.Equal("eu1", options.Region);
        Assert.NotEmpty(options.InstanceId);
    }

    [Fact]
    public void RouterEndpointConfig_CanBeCreated()
    {
        // Arrange & Act
        var config = new RouterEndpointConfig
        {
            Host = "localhost",
            Port = 5000,
            TransportType = TransportType.Tcp
        };

        // Assert
        Assert.Equal("localhost", config.Host);
        Assert.Equal(5000, config.Port);
        Assert.Equal(TransportType.Tcp, config.TransportType);
    }

    [Fact]
    public void Validate_ThrowsIfServiceNameEmpty()
    {
        // Arrange
        var options = new StellaMicroserviceOptions
        {
            ServiceName = "",
            Version = "1.0.0",
            Region = "eu1"
        };

        // Act & Assert
        Assert.Throws<InvalidOperationException>(() => options.Validate());
    }

    [Fact]
    public void Validate_ThrowsIfVersionInvalid()
    {
        // Arrange
        var options = new StellaMicroserviceOptions
        {
            ServiceName = "test",
            Version = "not-semver",
            Region = "eu1"
        };

        // Act & Assert
        var ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
        Assert.Contains("not valid semver", ex.Message);
    }

    [Fact]
    public void Validate_ThrowsIfNoRouters()
    {
        // Arrange
        var options = new StellaMicroserviceOptions
        {
            ServiceName = "test",
            Version = "1.0.0",
            Region = "eu1"
        };

        // Act & Assert
        var ex = Assert.Throws<InvalidOperationException>(() => options.Validate());
        Assert.Contains("router endpoint is required", ex.Message);
    }

    [Fact]
    public void Validate_AcceptsValidSemver()
    {
        // Arrange
        var options = new StellaMicroserviceOptions
        {
            ServiceName = "test",
            Version = "1.0.0",
            Region = "eu1",
            Routers = [new RouterEndpointConfig { Host = "localhost", Port = 5000 }]
        };

        // Act & Assert - no exception
        options.Validate();
    }

    [Fact]
    public void Validate_AcceptsSemverWithPrerelease()
    {
        // Arrange
        var options = new StellaMicroserviceOptions
        {
            ServiceName = "test",
            Version = "2.1.0-beta.1",
            Region = "eu1",
            Routers = [new RouterEndpointConfig { Host = "localhost", Port = 5000 }]
        };

        // Act & Assert - no exception
        options.Validate();
    }

    [Fact]
    public void DefaultHeartbeatInterval_Is10Seconds()
    {
        // Arrange & Act
        var options = new StellaMicroserviceOptions
        {
            ServiceName = "test",
            Version = "1.0.0",
            Region = "eu1"
        };

        // Assert
        Assert.Equal(TimeSpan.FromSeconds(10), options.HeartbeatInterval);
    }
}