using Agent.App.Cli;
using Agent.App.Configuration;

namespace Agent.Core.Tests;

public sealed class ConfigurationTests
{
    [Fact]
    public void ValidYamlLoadsTypedConfiguration()
    {
        using var directory = new TestDirectory();
        string config = CreateValidConfiguration(directory);
        AgentConfiguration result = ConfigurationLoader.Load(config);
        Assert.Equal(1, result.SchemaVersion);
        Assert.Equal("model", result.Ollama.Model);
        Assert.Equal("deny", result.Sandbox.Network.Mode);
    }

    [Fact]
    public void UnknownYamlPropertyIsFatal()
    {
        using var directory = new TestDirectory();
        string config = CreateValidConfiguration(directory);
        System.IO.File.AppendAllText(config, "unknown_root: true\n");
        Assert.Throws<ConfigurationException>(() => ConfigurationLoader.Load(config));
    }

    [Fact]
    public void InvalidSchemaIsFatal()
    {
        using var directory = new TestDirectory();
        string config = CreateValidConfiguration(directory);
        System.IO.File.WriteAllText(config, System.IO.File.ReadAllText(config).Replace("schema_version: 1", "schema_version: 2", StringComparison.Ordinal));
        Assert.Throws<ConfigurationException>(() => ConfigurationLoader.Load(config));
    }

    [Fact]
    public void CommandLineLanguageOverrideIsCaptured()
    {
        CommandLine result = CommandLine.Parse(["serve", "--lang", "ja", "--transport", "http"]);
        Assert.Equal("ja", result.Language);
        Assert.Equal("http", result.Transport);
    }

    [Fact]
    public void SkillLoader_supports_legacy_markdown_and_standard_skill_directories()
    {
        using var directory = new TestDirectory();
        directory.File("skills/legacy.md", "legacy skill");
        directory.File("skills/python-via-uv/SKILL.md", "standard skill");
        directory.File("skills/python-via-uv/reference.md", "must not be loaded as a skill");

        string[] skills = SkillLoader.Load(Path.Combine(directory.Path, "skills"));

        Assert.Equal(["legacy skill", "standard skill"], skills);
    }

    private static string CreateValidConfiguration(TestDirectory directory)
    {
        directory.File("prompts/user-system.md", string.Empty);
        Directory.CreateDirectory(System.IO.Path.Combine(directory.Path, "config/locales"));
        Directory.CreateDirectory(System.IO.Path.Combine(directory.Path, "skills"));
        return directory.File("agent.yaml", """
            schema_version: 1
            application:
              language: en
            agent:
              user_system_prompt: prompts/user-system.md
            ollama:
              endpoint: http://127.0.0.1:11434
              model: model
            localization:
              directory: config/locales
              fallback: en
            skills:
              directory: skills
            """);
    }
}