using System.Text.Json;
using ClawdDotNet.Core.Config;
using ClawdDotNet.Core.Organisation;
using ClawdDotNet.Core.Storage;
using ClawdDotNet.Core.Tasks;
using ClawdDotNet.Core.Tools;
using ClawdDotNet.Tools.Taskboard;
using ClawdDotNet.Tools.Tests.FileRW;
using Microsoft.Extensions.Logging.Abstractions;
using Shouldly;

namespace ClawdDotNet.Tools.Tests.Taskboard;

/// <summary>
/// #683: A task for another agent is a way of reaching it. The address book that holds for
/// messages holds here too — otherwise it could be walked around with task_create.
/// </summary>
public sealed class AssignmentReachTests : IDisposable
{
    private readonly string _directory;
    private readonly SqliteStorage _storage;
    private readonly SqliteTaskRepository _repo;
    private readonly TaskboardTool _tool = new();

    private readonly OrgChart _org = new(
        [
            new UnitConfig { Id = "amazon", Name = "Amazon", LeaderAgentId = "amazon-lead" },
            new UnitConfig { Id = "accounting", Name = "Accounting", LeaderAgentId = "accounting-lead" }
        ],
        [
            new AgentConfig { AgentId = "amazon-lead", UnitId = "amazon" },
            new AgentConfig { AgentId = "ads", UnitId = "amazon" },
            new AgentConfig { AgentId = "accounting-lead", UnitId = "accounting" },
            new AgentConfig { AgentId = "bookkeeper", UnitId = "accounting" }
        ]);

    public AssignmentReachTests()
    {
        _directory = Path.Combine(Path.GetTempPath(), "clawd-tests", Guid.NewGuid().ToString("N"));
        _storage = new SqliteStorage(Path.Combine(_directory, "state.db"));
        _repo = new SqliteTaskRepository(_storage);
    }

    public void Dispose()
    {
        ClawdDotNet.Core.Storage.SqliteStorage.ReleasePooledConnections(_directory);
        try { Directory.Delete(_directory, recursive: true); }
        catch { /* cleanup is secondary */ }
    }

    private Task<ToolResult> Run(string agentId, string json)
    {
        var context = new AgentToolContext(
            agentId, "inst", new Dictionary<string, object?>(), new NullStateStore(), NullLogger.Instance,
            CancellationToken.None, SharedWorkspacePath: Path.Combine(_directory, "SharedWorkspace"), Tasks: _repo)
        {
            Organisation = _org
        };
        return _tool.ExecuteAsync(JsonDocument.Parse(json).RootElement, context, CancellationToken.None);
    }

    [Fact]
    public async Task A_task_for_an_agent_outside_the_address_book_is_refused()
    {
        var result = await Run("ads", """{"action":"task_create","title":"Rechnung buchen","assignee":"@bookkeeper"}""");

        result.Success.ShouldBeFalse();
        result.ErrorMessage.ShouldNotBeNull().ShouldContain("not in your address book");
        result.ErrorMessage.ShouldContain("amazon-lead");
    }

    [Fact]
    public async Task A_fresh_run_of_an_agent_outside_is_refused_too()
    {
        var result = await Run("ads", """{"action":"task_create","title":"Rechnung buchen","assignee":"@new:bookkeeper"}""");

        result.Success.ShouldBeFalse();
    }

    [Fact]
    public async Task A_task_for_the_own_lead_or_the_human_goes_through()
    {
        (await Run("ads", """{"action":"task_create","title":"Frage an die Leitung","assignee":"@amazon-lead"}""")).Success.ShouldBeTrue();
        (await Run("ads", """{"action":"task_create","title":"Frage an den Menschen","assignee":"@human"}""")).Success.ShouldBeTrue();
        (await Run("ads", """{"action":"task_create","title":"Eigene Aufgabe","assignee":"@ads"}""")).Success.ShouldBeTrue();
    }

    [Fact]
    public async Task Reassigning_is_held_to_the_same_rule()
    {
        var created = await Run("ads", """{"action":"task_create","title":"Eigene Aufgabe","assignee":"@ads"}""");
        var id = created.Content!.Split(' ', ':', '\n').First(w => w.StartsWith("t-"));

        var result = await Run("ads", $$"""{"action":"task_update","id":"{{id}}","assignee":"@bookkeeper"}""");

        result.Success.ShouldBeFalse();
    }

    // ─── #686: meetings ───

    [Fact]
    public async Task A_lead_calls_a_meeting_with_whom_it_reaches()
    {
        var result = await Run("amazon-lead",
            """{"action":"task_create","title":"Leads round","type":"meeting","assignee":"@new:amazon-lead","participants":["ads","accounting-lead"],"body":"Late shipments"}""");

        result.Success.ShouldBeTrue(result.ErrorMessage);
        var meeting = (await _repo.ListAsync(new TaskQuery(), default)).Single(t => t.Title == "Leads round");
        meeting.Type.ShouldBe(TaskItemType.Meeting);
        meeting.Participants.ShouldBe(["ads", "accounting-lead"]);
    }

    [Fact]
    public async Task A_meeting_with_someone_outside_the_chairs_reach_is_refused()
    {
        var result = await Run("amazon-lead",
            """{"action":"task_create","title":"Round","type":"meeting","assignee":"@new:amazon-lead","participants":["bookkeeper"]}""");

        result.Success.ShouldBeFalse();
        result.ErrorMessage!.ShouldContain("cannot address 'bookkeeper'");
    }

    [Fact]
    public async Task Participants_without_a_meeting_are_a_mistake()
    {
        var result = await Run("amazon-lead",
            """{"action":"task_create","title":"Plain","assignee":"@ads","participants":["ads"]}""");

        result.Success.ShouldBeFalse();
        result.ErrorMessage!.ShouldContain("only belongs to a meeting");
    }
}