using ClaudeDo.Data;
using ClaudeDo.Ui.ViewModels.Islands;
using Microsoft.EntityFrameworkCore;
using Xunit;

namespace ClaudeDo.Ui.Tests.ViewModels;

public class TaskMonitorViewModelTests : IDisposable
{
    private readonly string _dbPath;

    public TaskMonitorViewModelTests()
    {
        _dbPath = Path.Combine(Path.GetTempPath(), $"claudedo_monitor_{Guid.NewGuid():N}.db");
        using var ctx = NewContext();
        ctx.Database.EnsureCreated();
    }

    public void Dispose()
    {
        try { File.Delete(_dbPath); } catch { }
        try { File.Delete(_dbPath + "-wal"); } catch { }
        try { File.Delete(_dbPath + "-shm"); } catch { }
    }

    private ClaudeDoDbContext NewContext()
    {
        var opts = new DbContextOptionsBuilder<ClaudeDoDbContext>()
            .UseSqlite($"Data Source={_dbPath}")
            .Options;
        return new ClaudeDoDbContext(opts);
    }

    private sealed class TestDbFactory : IDbContextFactory<ClaudeDoDbContext>
    {
        private readonly Func<ClaudeDoDbContext> _create;
        public TestDbFactory(Func<ClaudeDoDbContext> create) => _create = create;
        public ClaudeDoDbContext CreateDbContext() => _create();
    }

    private sealed class FakeWorker : StubWorkerClient { }

    private TaskMonitorViewModel Build(FakeWorker worker)
        => new TaskMonitorViewModel(new TestDbFactory(NewContext), worker);

    [Fact]
    public void Feeds_AccumulateLogLines_WithKinds()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");

        worker.RaiseTaskMessage("t1", "[sys] boot");
        worker.RaiseTaskMessage("t1", "[tool] read file");
        worker.RaiseTaskMessage("t1", "[claude] hello");

        Assert.Equal(3, vm.Log.Count);
        Assert.Equal(LogKind.Sys, vm.Log[0].Kind);
        Assert.Equal(LogKind.Tool, vm.Log[1].Kind);
        Assert.Equal(LogKind.Claude, vm.Log[2].Kind);
    }

    [Fact]
    public void Feeds_ForOtherTask_AreIgnored()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");

        worker.RaiseTaskMessage("other", "[sys] not mine");

        Assert.Empty(vm.Log);
    }

    [Fact]
    public void TaskFinished_FlipsState_AndAppendsDoneLine()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");

        worker.RaiseTaskFinished("slot-1", "t1", "done", DateTime.UtcNow);

        Assert.True(vm.IsDone);
        Assert.Equal("done", vm.AgentState);
        Assert.Equal(LogKind.Done, vm.Log[^1].Kind);
    }

    [Fact]
    public void ApplyOutcome_SplitsRoadblockMarker()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);

        vm.ApplyOutcome(
            "Summary text\n\nRoadblocks reported during the run:\n- something broke",
            errorFallback: null);

        Assert.Equal("Summary text", vm.SessionOutcome);
        Assert.Equal("- something broke", vm.Roadblocks);
    }

    [Fact]
    public void HasRoadblock_TrueAfterRoadblockOutcome()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.ApplyOutcome("Summary\n\nRoadblocks reported during the run:\n- broke", errorFallback: null);
        Assert.True(vm.HasRoadblock);
    }

    [Fact]
    public void Detach_WhenNotDetached_InvokesDetachRequested()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        TaskMonitorViewModel? requested = null;
        vm.DetachRequested = m => requested = m;
        vm.DetachCommand.Execute(null);
        Assert.Same(vm, requested);
    }

    [Fact]
    public void TaskQuestionAsked_SurfacesQuestion()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");

        worker.RaiseTaskQuestionAsked("t1", "q1", "DPAPI or plaintext?");

        Assert.True(vm.HasPendingQuestion);
        Assert.Equal("DPAPI or plaintext?", vm.PendingQuestion);
        Assert.True(vm.SubmitAnswerCommand.CanExecute(null) is false); // no draft yet
    }

    [Fact]
    public void TaskQuestionAsked_ForOtherTask_IsIgnored()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");

        worker.RaiseTaskQuestionAsked("other", "q1", "not mine");

        Assert.False(vm.HasPendingQuestion);
    }

    [Fact]
    public async Task SubmitAnswer_InvokesClient_AndClears()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseTaskQuestionAsked("t1", "q1", "DPAPI or plaintext?");
        vm.AnswerDraft = "DPAPI please";

        Assert.True(vm.SubmitAnswerCommand.CanExecute(null));
        await vm.SubmitAnswerCommand.ExecuteAsync(null);

        Assert.Equal(("t1", "q1", "DPAPI please"), worker.LastAnswer);
        Assert.False(vm.HasPendingQuestion);
        Assert.Equal(string.Empty, vm.AnswerDraft);
    }

    [Fact]
    public void TaskQuestionResolved_ClearsMatchingQuestion()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseTaskQuestionAsked("t1", "q1", "?");

        worker.RaiseTaskQuestionResolved("t1", "q1");

        Assert.False(vm.HasPendingQuestion);
    }

    [Fact]
    public void TaskFinished_ClearsPendingQuestion()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseTaskQuestionAsked("t1", "q1", "?");

        worker.RaiseTaskFinished("slot-1", "t1", "done", DateTime.UtcNow);

        Assert.False(vm.HasPendingQuestion);
    }

    // ── Interactive composer ──────────────────────────────────────────────────

    [Fact]
    public void InteractiveStarted_ForSubscribedTask_SetsIsInteractiveLive()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");

        worker.RaiseInteractiveStarted("t1");

        Assert.True(vm.IsInteractiveLive);
        Assert.Equal("running", vm.AgentState);
    }

    [Fact]
    public void InteractiveStarted_ForOtherTask_IsIgnored()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");

        worker.RaiseInteractiveStarted("other");

        Assert.False(vm.IsInteractiveLive);
    }

    [Fact]
    public void InteractiveEnded_ForSubscribedTask_ClearsIsInteractiveLive()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseInteractiveStarted("t1");

        worker.RaiseInteractiveEnded("t1");

        Assert.False(vm.IsInteractiveLive);
        Assert.Equal("done", vm.AgentState);
    }

    [Fact]
    public void InteractiveEnded_ForOtherTask_IsIgnored()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseInteractiveStarted("t1");

        worker.RaiseInteractiveEnded("other");

        Assert.True(vm.IsInteractiveLive); // unchanged
    }

    [Fact]
    public void SubmitComposerCommand_CanExecute_FalseWhenNotLive()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        vm.ComposerDraft = "hello";

        Assert.False(vm.SubmitComposerCommand.CanExecute(null));
    }

    [Fact]
    public void SubmitComposerCommand_CanExecute_FalseWhenLiveButDraftWhitespace()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseInteractiveStarted("t1");
        vm.ComposerDraft = "   ";

        Assert.False(vm.SubmitComposerCommand.CanExecute(null));
    }

    [Fact]
    public void SubmitComposerCommand_CanExecute_TrueWhenLiveAndDraftSet()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseInteractiveStarted("t1");
        vm.ComposerDraft = "hello";

        Assert.True(vm.SubmitComposerCommand.CanExecute(null));
    }

    [Fact]
    public async Task SubmitComposer_AddsUserLogLine_ClearsDraft_CallsClient()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseInteractiveStarted("t1");
        vm.ComposerDraft = "do the thing";

        await vm.SubmitComposerCommand.ExecuteAsync(null);

        Assert.Single(worker.SentInteractive);
        Assert.Equal(("t1", "do the thing"), worker.SentInteractive[0]);
        Assert.Equal(string.Empty, vm.ComposerDraft);
        Assert.Single(vm.Log);
        Assert.Equal(LogKind.User, vm.Log[0].Kind);
        Assert.Equal("do the thing", vm.Log[0].Text);
    }

    [Fact]
    public async Task InterruptInteractiveCommand_WhenLive_RecordsOneCall()
    {
        var worker = new FakeWorker();
        using var vm = Build(worker);
        vm.SetTaskId("t1");
        worker.RaiseInteractiveStarted("t1");

        await vm.InterruptInteractiveCommand.ExecuteAsync(null);

        Assert.Single(worker.InterruptedInteractive);
        Assert.Equal("t1", worker.InterruptedInteractive[0]);
    }
}