using ChatBot.Models.Configuration;
using ChatBot.Models.Configuration.Validators;
using FluentAssertions;

namespace ChatBot.Tests.Configuration.Validators;

public class OllamaSettingsValidatorTests
{
    private readonly OllamaSettingsValidator _validator = new();

    [Fact]
    public void Validate_ShouldReturnSuccess_WhenSettingsAreValid()
    {
        // Arrange
        var settings = new OllamaSettings
        {
            Url = "http://localhost:11434",
            DefaultModel = "llama3.2",
        };

        // Act
        var result = _validator.Validate(null, settings);

        // Assert
        result.Succeeded.Should().BeTrue();
    }

    [Fact]
    public void Validate_ShouldReturnFailure_WhenUrlIsEmpty()
    {
        // Arrange
        var settings = new OllamaSettings { Url = "", DefaultModel = "llama3.2" };

        // Act
        var result = _validator.Validate(null, settings);

        // Assert
        result.Succeeded.Should().BeFalse();
        result.Failures.Should().Contain(f => f.Contains("Ollama URL is required"));
    }

    [Fact]
    public void Validate_ShouldReturnFailure_WhenUrlIsInvalid()
    {
        // Arrange
        var settings = new OllamaSettings { Url = "invalid-url", DefaultModel = "llama3.2" };

        // Act
        var result = _validator.Validate(null, settings);

        // Assert
        result.Succeeded.Should().BeFalse();
        result.Failures.Should().Contain(f => f.Contains("Invalid Ollama URL format"));
    }

    [Fact]
    public void Validate_ShouldReturnFailure_WhenDefaultModelIsEmpty()
    {
        // Arrange
        var settings = new OllamaSettings { Url = "http://localhost:11434", DefaultModel = "" };

        // Act
        var result = _validator.Validate(null, settings);

        // Assert
        result.Succeeded.Should().BeFalse();
        result.Failures.Should().Contain(f => f.Contains("DefaultModel is required"));
    }

    [Theory]
    [InlineData(null)]
    [InlineData("")]
    [InlineData("   ")]
    public void Validate_ShouldReturnFailure_WhenUrlIsNullOrWhitespace(string? url)
    {
        // Arrange
        var settings = new OllamaSettings { Url = url!, DefaultModel = "llama3.2" };

        // Act
        var result = _validator.Validate(null, settings);

        // Assert
        result.Succeeded.Should().BeFalse();
        result.Failures.Should().Contain(f => f.Contains("Ollama URL is required"));
    }
}