using Xunit;
using FluentAssertions;
using NSubstitute;
using FreeCode.Core.Interfaces;
using FreeCode.Core.Models;
using FreeCode.Mcp;
using FreeCode.Tests.Unit.Helpers;

namespace FreeCode.Tests.Unit.Mcp;

public sealed class McpClientManagerTests
{
    [Fact]
    public void GetConnections_WithoutStateOrDiskConfig_ReturnsEmpty()
    {
        var manager = new McpClientManager();

        manager.GetConnections().Should().BeEmpty();
    }

    [Fact]
    public async Task ConnectServerAsync_WithUnknownServer_ThrowsKeyNotFoundException()
    {
        var manager = new McpClientManager();

        var act = async () => await manager.ConnectServerAsync("missing");

        await act.Should().ThrowAsync<KeyNotFoundException>();
    }

    [Fact]
    public async Task DisconnectServerAsync_WithUnknownServer_CompletesWithoutThrowing()
    {
        var manager = new McpClientManager();

        var act = async () => await manager.DisconnectServerAsync("missing");

        await act.Should().NotThrowAsync();
    }

    [Fact]
    public async Task ReconnectServerAsync_WithUnknownServer_CompletesWithoutThrowing()
    {
        var manager = new McpClientManager();

        var act = async () => await manager.ReconnectServerAsync("missing");

        await act.Should().NotThrowAsync();
    }

    [Fact]
    public async Task AuthenticateServerAsync_WithBlankServerName_ThrowsArgumentException()
    {
        var manager = new McpClientManager();

        var act = async () => await manager.AuthenticateServerAsync(" ");

        await act.Should().ThrowAsync<ArgumentException>();
    }

    [Fact]
    public async Task AuthenticateServerAsync_WithUnknownServer_ThrowsKeyNotFoundException()
    {
        var manager = new McpClientManager();

        var act = async () => await manager.AuthenticateServerAsync("missing");

        await act.Should().ThrowAsync<KeyNotFoundException>();
    }
}