using System.Net;
using System.Text.Json.Nodes;
using ClaudeDo.Data.Git;
using ClaudeDo.Data.Models;
using ClaudeDo.Data.Repositories;
using ClaudeDo.Worker.AzureDevOps;
using ClaudeDo.Worker.Config;
using ClaudeDo.Worker.Git;
using ClaudeDo.Worker.Hub;
using ClaudeDo.Worker.Lifecycle;
using ClaudeDo.Worker.Runner;
using ClaudeDo.Worker.Tests.Infrastructure;
using ClaudeDo.Worker.Tests.Services;
using ClaudeDo.Worker.Tests.Tickets;
using ClaudeDo.Worker.Tickets;
using Microsoft.Extensions.Logging.Abstractions;
using TaskStatus = ClaudeDo.Data.Models.TaskStatus;

namespace ClaudeDo.Worker.Tests.AzureDevOps;

/// <summary>
/// Spec 2026-10-01 section 3: approve in a company repo = verify in the worktree, push, draft PR. origin is an
/// ADO-shaped URL so it parses, and <c>pushInsteadOf</c> sends the push into a local bare repo. HTTP stubbed.
/// </summary>
public sealed class CompanyApproveTests : IDisposable
{
    private const string Remote = "http://ado.test/coll/proj/_git/Repo";

    private readonly DbFixture _db = new();
    private readonly GitRepoFixture _repo = new();
    private readonly string _tempDir = Path.Combine(Path.GetTempPath(), $"cd_capr_{Guid.NewGuid():N}");
    private readonly string _bare;
    private readonly string _listName = $"ca{Guid.NewGuid():N}"[..12];
    private readonly WorkerConfig _cfg;
    private readonly GitService _git = new();
    private readonly FakeVerifyCommandRunner _verify = new();
    private readonly HubBroadcaster _broadcaster = new(new CapturingHubContext());
    private WorktreeContext _wt = null!;

    public CompanyApproveTests()
    {
        Directory.CreateDirectory(_tempDir);
        GitRepoFixture.RunGit(_repo.RepoDir, "branch", "-m", "main");
        _bare = Path.Combine(_tempDir, "origin.git").Replace('\\', '/');
        GitRepoFixture.RunGit(_tempDir, "clone", "--bare", "-q", _repo.RepoDir, _bare);
        _cfg = new WorkerConfig { SandboxRoot = _tempDir, LogRoot = _tempDir, WorktreeRootStrategy = "sibling" };

        using var ctx = _db.CreateContext();
        ctx.Lists.Add(new ListEntity { Id = "l1", Name = _listName, WorkingDir = _repo.RepoDir, CreatedAt = DateTime.UtcNow });
        ctx.ListConfigs.Add(new ListConfigEntity { ListId = "l1", VerifyCommand = "dotnet test" });
        ctx.Tasks.Add(new TaskEntity { Id = "t1", ListId = "l1", Title = "Scan erfassen", Number = 1, CommitType = "feat",
            Description = "Scanner-Parität", TicketRef = "bandel:412", Status = TaskStatus.WaitingForReview, CreatedAt = DateTime.UtcNow });
        ctx.SaveChanges();
    }

    public void Dispose()
    {
        try { GitRepoFixture.RunGit(_repo.RepoDir, "worktree", "remove", "--force", _wt.WorktreePath); } catch { }
        try { Directory.Delete(Path.Combine(WorktreeRootResolver.ResolveSiblingRoot(_repo.RepoDir), ".claudedo-worktrees", _listName), true); } catch { }
        _db.Dispose();
        _repo.Dispose();
        try { GitRepoFixture.ForceDeleteDirectory(_tempDir); } catch { }
    }

    /// <summary>Worktree with one commit, created while the repo is still private (no fetch), then origin turns ADO.</summary>
    private async Task SetUpWorktree()
    {
        TaskEntity task; ListEntity list;
        using (var ctx = _db.CreateContext()) { task = ctx.Tasks.Single(); list = ctx.Lists.Single(); }
        var manager = new WorktreeManager(_git, _db.CreateFactory(), _cfg, NullLogger<WorktreeManager>.Instance);
        _wt = await manager.CreateAsync(task, list, default);
        File.WriteAllText(Path.Combine(_wt.WorktreePath, "scan.txt"), "scan");
        GitRepoFixture.RunGit(_wt.WorktreePath, "add", "-A");
        GitRepoFixture.RunGit(_wt.WorktreePath, "commit", "-q", "-m", "scan");

        GitRepoFixture.RunGit(_repo.RepoDir, "remote", "add", "origin", Remote);
        GitRepoFixture.RunGit(_repo.RepoDir, "config", $"url.{_bare}.pushInsteadOf", Remote);
    }

    private TaskMergeService Merge(StubHandler handler, string? pat = "geheim", bool tickets = false)
    {
        var azdo = new AzureDevOpsClient(new StubHttpClientFactory(handler), AzureDevOpsClientTests.PatStore(_tempDir, pat));
        TicketClientFactory? ticketClients = null;
        if (tickets)
        {
            var ticketPat = new TicketPatStore(new DpapiTokenStore(Path.Combine(_tempDir, "ticket.pat")));
            ticketPat.Store.Save("tsp_x");
            var config = new TicketSystemConfig(new WorkerConfig { TicketApiBaseUrl = "http://tickets.test" }, ticketPat);
            ticketClients = new TicketClientFactory(config, new StubHttpClientFactory(handler), NullLogger<BandelTicketClient>.Instance);
        }
        var publisher = new PullRequestPublisher(_git, azdo, _db.CreateFactory(), _broadcaster, _cfg,
            NullLogger<PullRequestPublisher>.Instance, ticketClients);
        return new TaskMergeService(_db.CreateFactory(), _git, _broadcaster, TaskStateServiceBuilder.Build(_db.CreateFactory()).State,
            _verify, NullLogger<TaskMergeService>.Instance, pullRequests: publisher);
    }

    private static StubHandler Ado(string existingPrs = "[]", HttpStatusCode postStatus = HttpStatusCode.Created) => new(req =>
        req.RequestUri!.Host == "tickets.test"
            ? (HttpStatusCode.OK, req.RequestUri.AbsolutePath switch
            {
                // Task 412 → ticket 400 → project 393 (live shape: a project has no parent).
                "/api/ticket/412" => Envelope("""{"id":412,"parentTicketID":400}"""),
                "/api/ticket/400" => Envelope("""{"id":400,"parentTicketID":393}"""),
                _ => Envelope("""{"id":393,"parentTicketID":null}"""),
            })
        : req.RequestUri!.AbsolutePath.EndsWith("/pullrequests")
            ? req.Method == HttpMethod.Get
                ? (HttpStatusCode.OK, $$"""{"value":{{existingPrs}}}""")
                : (postStatus, postStatus == HttpStatusCode.Created ? """{"pullRequestId":5}""" : """{"message":"TF0: server error"}""")
            : (HttpStatusCode.OK, """{"defaultBranch":"refs/heads/main"}"""));

    private static string Envelope(string data) => $$"""{"success":true,"data":{{data}},"message":"ok"}""";

    private bool BareHasBranch() =>
        GitRepoFixture.RunGit(_bare, "branch", "--list", _wt.BranchName).Trim().Length > 0;

    private async Task<(TaskEntity Task, WorktreeEntity Wt)> Rows()
    {
        using var ctx = _db.CreateContext();
        return ((await new TaskRepository(ctx).GetByIdAsync("t1"))!, (await new WorktreeRepository(ctx).GetByTaskIdAsync("t1"))!);
    }

    [Fact]
    public async Task Approve_VerifiesInWorktree_PushesAndCreatesDraftPr_TaskStaysInReview()
    {
        if (!GitRepoFixture.IsGitAvailable()) return;
        await SetUpWorktree();
        var ado = Ado();

        var r = await Merge(ado).ApproveAndMergeAsync("t1", "", default);

        Assert.Equal(TaskMergeService.StatusPrCreated, r.Status);
        Assert.Equal($"{Remote}/pullrequest/5", r.PullRequestUrl);
        Assert.Equal(_wt.WorktreePath, _verify.CapturedWorkingDir);
        Assert.True(BareHasBranch());
        var (task, wt) = await Rows();
        Assert.Equal(TaskStatus.WaitingForReview, task.Status);
        Assert.Equal(WorktreeState.Active, wt.State);
        Assert.Equal(r.PullRequestUrl, wt.PullRequestUrl);

        var body = JsonNode.Parse(ado.Bodies.Last())!;
        Assert.Equal($"feat({_listName}): Scan erfassen, Resolves #412", body["title"]!.GetValue<string>());
        Assert.Equal("Resolves #412\n\nScanner-Parität\n\nGeprüft: `dotnet test` grün", body["description"]!.GetValue<string>());
        Assert.Equal("refs/heads/main", body["targetRefName"]!.GetValue<string>());
        Assert.True(body["isDraft"]!.GetValue<bool>());
    }

    [Fact]
    public async Task Approve_LinksTicketUnderItsProject_WalkingUpFromATask()
    {
        if (!GitRepoFixture.IsGitAvailable()) return;
        await SetUpWorktree();
        var ado = Ado();

        await Merge(ado, tickets: true).ApproveAndMergeAsync("t1", "", default);

        var description = JsonNode.Parse(ado.Bodies.Last())!["description"]!.GetValue<string>();
        Assert.StartsWith("Resolves [#412](https://ticket.fb-tuning.local/board/project/393/ticket/412)", description);
    }

    [Fact]
    public async Task Approve_ReusesActivePr_AsUpdate()
    {
        if (!GitRepoFixture.IsGitAvailable()) return;
        await SetUpWorktree();
        var ado = Ado(existingPrs: """[{"pullRequestId":9}]""");

        var r = await Merge(ado).ApproveAndMergeAsync("t1", "", default);

        Assert.Equal(TaskMergeService.StatusPrUpdated, r.Status);
        Assert.EndsWith("/pullrequest/9", r.PullRequestUrl);
        Assert.DoesNotContain(ado.Requests, q => q.Method == HttpMethod.Post);
    }

    [Fact]
    public async Task Approve_RedVerify_PushesNothing()
    {
        if (!GitRepoFixture.IsGitAvailable()) return;
        await SetUpWorktree();
        _verify.Result = new VerifyCommandResult(1, false, "boom");
        var ado = Ado();

        var r = await Merge(ado).ApproveAndMergeAsync("t1", "", default);

        Assert.Equal(TaskMergeService.StatusVerifyFailed, r.Status);
        Assert.False(BareHasBranch());
        Assert.Empty(ado.Requests);
    }

    [Fact]
    public async Task Approve_PrFailsAfterPush_SaysSoHonestly()
    {
        if (!GitRepoFixture.IsGitAvailable()) return;
        await SetUpWorktree();

        var r = await Merge(Ado(postStatus: HttpStatusCode.InternalServerError)).ApproveAndMergeAsync("t1", "", default);

        Assert.Equal(TaskMergeService.StatusBlocked, r.Status);
        Assert.StartsWith("gepusht, PR fehlgeschlagen", r.ErrorMessage);
        Assert.True(BareHasBranch());
        Assert.Null((await Rows()).Wt.PullRequestUrl);
    }

    [Fact]
    public async Task Approve_SkipVerifyIsIgnored()
    {
        if (!GitRepoFixture.IsGitAvailable()) return;
        await SetUpWorktree();

        var r = await Merge(Ado()).ApproveAndMergeAsync("t1", "", leaveConflictsInTree: false, default, skipVerify: true);

        Assert.Equal(TaskMergeService.StatusPrCreated, r.Status);
        Assert.Equal(1, _verify.CallCount);
    }

    [Fact]
    public async Task Approve_WithoutPat_BlocksBeforeVerifyAndPush()
    {
        if (!GitRepoFixture.IsGitAvailable()) return;
        await SetUpWorktree();

        var r = await Merge(Ado(), pat: null).ApproveAndMergeAsync("t1", "", default);

        Assert.Equal(TaskMergeService.StatusBlocked, r.Status);
        Assert.Contains("PAT", r.ErrorMessage);
        Assert.Equal(0, _verify.CallCount);
        Assert.False(BareHasBranch());
    }
}