using OpenHarbor.MCP.Client.Core.Models;
using Xunit;

namespace OpenHarbor.MCP.Client.Core.Tests.Models;

/// <summary>
/// Unit tests for McpToolResult following TDD approach.
/// Tests result creation, success/failure states, and factory methods.
/// </summary>
public class McpToolResultTests
{
    [Fact]
    public void Success_WithContent_ReturnsSuccessResult()
    {
        // Arrange
        var content = "Test content";

        // Act
        var result = McpToolResult.Success(content);

        // Assert
        Assert.True(result.IsSuccess);
        Assert.Equal(content, result.Content);
        Assert.Null(result.Error);
    }

    [Fact]
    public void Success_WithEmptyContent_ReturnsSuccessResultWithEmptyString()
    {
        // Arrange
        var content = string.Empty;

        // Act
        var result = McpToolResult.Success(content);

        // Assert
        Assert.True(result.IsSuccess);
        Assert.Equal(string.Empty, result.Content);
        Assert.Null(result.Error);
    }

    [Fact]
    public void Failure_WithError_ReturnsFailureResult()
    {
        // Arrange
        var error = "Test error";

        // Act
        var result = McpToolResult.Failure(error);

        // Assert
        Assert.False(result.IsSuccess);
        Assert.Equal(error, result.Error);
        Assert.Equal(string.Empty, result.Content);
    }

    [Fact]
    public void Failure_WithEmptyError_ReturnsFailureResult()
    {
        // Arrange
        var error = string.Empty;

        // Act
        var result = McpToolResult.Failure(error);

        // Assert
        Assert.False(result.IsSuccess);
        Assert.Equal(string.Empty, result.Error);
        Assert.Equal(string.Empty, result.Content);
    }

    [Fact]
    public void Constructor_WithInitializers_SetsProperties()
    {
        // Arrange & Act
        var result = new McpToolResult
        {
            IsSuccess = true,
            Content = "Test content",
            Error = null
        };

        // Assert
        Assert.True(result.IsSuccess);
        Assert.Equal("Test content", result.Content);
        Assert.Null(result.Error);
    }

    [Fact]
    public void Default_Content_IsEmptyString()
    {
        // Arrange & Act
        var result = new McpToolResult { IsSuccess = false };

        // Assert
        Assert.Equal(string.Empty, result.Content);
    }
}