using System.Text.Json;
using ClawdDotNet.Core.Cases;
using ClawdDotNet.Core.Config;
using ClawdDotNet.Core.Organisation;
using ClawdDotNet.Core.Security;
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>#689: The agent's side of escalation — every agent has it, the engine supplies who and where.</summary>
public sealed class EscalationToolTests : IDisposable
{
    private readonly string _directory = Path.Combine(Path.GetTempPath(), "clawd-tests", Guid.NewGuid().ToString("N"));
    private readonly SqliteTaskRepository _tasks;
    private readonly TaskboardService _board;
    private readonly CaseDesk _desk;
    private readonly EscalationTool _tool = new();

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

    public EscalationToolTests()
    {
        var storage = new SqliteStorage(Path.Combine(_directory, "state.db"));
        _tasks = new SqliteTaskRepository(storage);
        _board = new TaskboardService(_tasks, Path.Combine(_directory, "tasks"));
        _desk = new CaseDesk(new SqliteCaseRepository(storage), _board, () => _org, () => new CaseSettings(), NullLogger.Instance);
    }

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

    private Task<ToolResult> Run(string agent, object input, string? runTaskId = null)
        => _tool.ExecuteAsync(JsonSerializer.SerializeToElement(input), new AgentToolContext(
            agent, "inst", new Dictionary<string, object?>(), new NullStateStore(), NullLogger.Instance, CancellationToken.None)
        {
            Organisation = _org,
            Cases = _desk,
            RunId = "run-" + agent,
            RunTaskId = runTaskId
        }, CancellationToken.None);

    [Fact]
    public async Task Escalating_in_a_task_run_holds_that_task_and_reaches_the_lead()
    {
        await _board.CreateAsync(new TaskItem { Id = "t-1", Title = "Price the chair", Assignee = "@ads" }, default);

        var result = await Run("ads", new
        {
            action = "escalate", subject = "Minimum price for the A-100", question = "Below which price may I not go?"
        }, runTaskId: "t-1");

        result.Success.ShouldBeTrue(result.ErrorMessage);
        result.Content.ShouldContain("amazon-lead");
        (await _tasks.GetAsync("t-1", default))!.Status.ShouldBe(TaskItemStatus.Blocked);

        var cases = await Run("amazon-lead", new { action = "list_cases" });
        cases.Content.ShouldContain("you hold it");
    }

    [Fact]
    public async Task A_lead_decides_and_the_decision_is_found_afterwards()
    {
        var opened = await Run("ads", new { action = "escalate", subject = "Minimum price for the A-100", question = "How low?" });
        var caseId = opened.Content.Split(' ')[3].TrimEnd('.');

        (await Run("amazon-lead", new { action = "decide", @case = caseId, answer = "Never below 89 EUR.", reasoning = "Margin." }))
            .Success.ShouldBeTrue();

        (await Run("ads", new { action = "find_decisions", subject = "minimum price A-100" })).Content.ShouldContain("Never below 89 EUR.");
    }

    [Fact]
    public void Every_agent_has_it_without_being_granted_it()
    {
        var registry = new ToolRegistry();
        registry.Register(_tool);
        var agent = new AgentConfig { AgentId = "ads" };

        registry.GetForAgent(agent).ShouldContain(t => t.Name == CaseDesk.ToolName);
        new PermissionGate().IsAllowed("ads", CaseDesk.ToolName, agent).ShouldBeTrue();
        new PermissionGate().IsAllowed("ads", "Mail", agent).ShouldBeFalse("only escalation is implicit");
    }
}