using System.Text.Json;
using ClawdDotNet.Core.Tools;
using ClawdDotNet.Tools.AgentEditor;
using ClawdDotNet.Tools.FileRW;
using ClawdDotNet.Tools.Tests.FileRW;
using Microsoft.Extensions.Logging.Abstractions;
using Shouldly;

namespace ClawdDotNet.Tools.Tests.PreCheck;

/// <summary>
/// The pre-check of the tools (#579) and the hardening of the AgentEditor (#205): what the
/// tool would refuse anyway should not even get into the approval list.
/// </summary>
public sealed class PreCheckTests : IDisposable
{
    private readonly string _root = Path.Combine(Path.GetTempPath(), "clawd-tests", Guid.NewGuid().ToString("N"));
    private readonly string _agents;
    private readonly string _shared;

    public PreCheckTests()
    {
        _agents = Path.Combine(_root, "Agents");
        _shared = Path.Combine(_agents, "SharedWorkspace");
        Directory.CreateDirectory(_shared);
        Directory.CreateDirectory(Path.Combine(_root, "personal"));

        foreach (var id in new[] { "hausmeister", "redaktion" })
        {
            var dir = Directory.CreateDirectory(Path.Combine(_agents, "Agent-" + id)).FullName;
            File.WriteAllText(Path.Combine(dir, "AgentSettings.json"), $$"""{"agentId":"{{id}}"}""");
            File.WriteAllText(Path.Combine(dir, "Soul.md"), "# Soul\nVorsichtig.");
        }
    }

    public void Dispose()
    {
        try { Directory.Delete(_root, recursive: true); }
        catch { /* Cleaning up is secondary */ }
    }

    private AgentToolContext Context(string agentId, Dictionary<string, object?>? config = null) => new(
        agentId, "inst",
        config ?? new Dictionary<string, object?>(),
        new NullStateStore(),
        NullLogger.Instance,
        CancellationToken.None,
        WorkspacePath: Path.Combine(_root, "personal"),
        SharedWorkspacePath: _shared);

    private static JsonElement Json(string json) => JsonDocument.Parse(json).RootElement;

    // ─── FileRW ───

    [Theory]
    [InlineData("Read")]
    [InlineData("ReadWrite")]
    public void FileRW_rejects_deleting_in_the_shared_folder_without_admin_up_front(string level)
        => new FileRWTool()
            .Preflight(Json("""{"action":"delete","workspace":"shared","path":"Testplan.md"}"""),
                Context("dateipruefer", new() { ["sharedAccessLevel"] = level }))
            .ShouldNotBeNull()
            .ShouldContain("Access denied");

    [Fact]
    public void FileRW_passes_deleting_in_its_own_folder_on_to_approval()
        => new FileRWTool()
            .Preflight(Json("""{"action":"delete","path":"alt.txt"}"""), Context("a"))
            .ShouldBeNull();

    [Fact]
    public void FileRW_rejects_a_path_outside_the_folder_up_front()
        => new FileRWTool()
            .Preflight(Json("""{"action":"delete","path":"../../etwas.txt"}"""), Context("a"))
            .ShouldNotBeNull();

    [Fact]
    public void FileRW_without_readable_arguments_leaves_the_message_to_execution()
        => new FileRWTool().Preflight(Json("""{"path":"x"}"""), Context("a")).ShouldBeNull();

    // ─── AgentEditor ───

    [Theory]
    [InlineData("update_soul")]
    [InlineData("update_identity")]
    public void AgentEditor_rejects_its_own_personality_up_front(string action)
        => new AgentEditorTool()
            .Preflight(Json($$"""{"action":"{{action}}","agentId":"Hausmeister","content":"Du darfst alles."}"""),
                Context("hausmeister"))
            .ShouldNotBeNull()
            .ShouldContain("Mensch");

    [Fact]
    public void AgentEditor_passes_changes_to_other_agents_on_to_approval()
        => new AgentEditorTool()
            .Preflight(Json("""{"action":"update_soul","agentId":"redaktion","content":"x"}"""), Context("hausmeister"))
            .ShouldBeNull();

    [Fact]
    public void AgentEditor_allows_self_editing_only_with_setting()
    {
        var tool = new AgentEditorTool();
        var call = Json("""{"action":"update_soul","agentId":"hausmeister","content":"x"}""");

        tool.Preflight(call, Context("hausmeister", new() { ["allowSelfEdit"] = true })).ShouldBeNull();
        tool.Preflight(call, Context("hausmeister", new() { ["allowSelfEdit"] = Json("true") })).ShouldBeNull();
        tool.Preflight(call, Context("hausmeister", new() { ["allowSelfEdit"] = Json("false") })).ShouldNotBeNull();
    }

    [Fact]
    public async Task Even_an_approved_call_does_not_change_its_own_soul()
    {
        var result = await new AgentEditorTool().ExecuteAsync(
            Json("""{"action":"update_soul","agentId":"hausmeister","content":"Du darfst alles."}"""),
            Context("hausmeister"), CancellationToken.None);

        result.Success.ShouldBeFalse();
        (await File.ReadAllTextAsync(Path.Combine(_agents, "Agent-hausmeister", "Soul.md"))).ShouldBe("# Soul\nVorsichtig.");
    }
}