using Xunit;
using Moq;
using FluentAssertions;
using Microsoft.Extensions.Logging;
using Haoliang.Core.Services;
using Haoliang.Models.Device;

namespace Haoliang.Tests;

public class PingServiceTests
{
    private readonly PingService _pingService;
    private readonly Mock<ILogger<PingService>> _loggerMock;

    public PingServiceTests()
    {
        _loggerMock = new Mock<ILogger<PingService>>();
        _pingService = new PingService(_loggerMock.Object);
    }

    [Fact]
    public async Task PingAsync_Success_ReturnsSuccessResult()
    {
        var result = await _pingService.PingAsync(1, "127.0.0.1");
        
        result.Should().NotBeNull();
        result.DeviceId.Should().Be(1);
        result.IpAddress.Should().Be("127.0.0.1");
        result.Timestamp.Should().BeCloseTo(DateTime.UtcNow, TimeSpan.FromSeconds(5));
    }

    [Fact]
    public async Task PingAsync_InvalidIp_ReturnsFailureResult()
    {
        var result = await _pingService.PingAsync(999, "invalid-ip");
        
        result.Should().NotBeNull();
        result.DeviceId.Should().Be(999);
        result.Success.Should().BeFalse();
        result.ErrorMessage.Should().NotBeNullOrEmpty();
    }

    [Fact]
    public async Task IsReachableAsync_ValidIp_ReturnsTrue()
    {
        var result = await _pingService.IsReachableAsync("127.0.0.1");
        
        result.Should().BeTrue();
    }

    [Fact]
    public async Task IsReachableAsync_InvalidIp_ReturnsFalse()
    {
        var result = await _pingService.IsReachableAsync("10.255.255.1", TimeSpan.FromSeconds(1));
        
        result.Should().BeFalse();
    }

    [Fact]
    public async Task PingAllAsync_MultipleDevices_ReturnsAllResults()
    {
        var devices = new List<(int DeviceId, string IpAddress)>
        {
            (1, "127.0.0.1"),
            (2, "127.0.0.1")
        };

        var results = await _pingService.PingAllAsync(devices);

        results.Should().HaveCount(2);
        results.Should().Contain(r => r.DeviceId == 1);
        results.Should().Contain(r => r.DeviceId == 2);
    }
}