using System.Net;
using System.Text;
using System.Text.Json;
using SVSim.UnitTests.Infrastructure;

namespace SVSim.UnitTests.Controllers;

/// <summary>
/// Coverage for <c>/check/*</c> — the first two endpoints the client hits on boot. The
/// SpecialTitle smoke is duplicated in RoutingSmokeTests for routing-prefix coverage; this
/// test layers shape assertions over the deeper boot-path concern.
/// </summary>
public class CheckControllerTests
{
    private const string BaseRequestJson =
        """{"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";

    private const string GameStartRequestJson =
        """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","app_type":0,"campaign_data":"","campaign_sign":"","campaign_user":0}""";

    [Test]
    public async Task SpecialTitle_returns_default_title_id()
    {
        using var factory = new SVSimTestFactory();
        using var client = factory.CreateClient();

        var response = await client.PostAsync("/check/special_title",
            new StringContent(BaseRequestJson, Encoding.UTF8, "application/json"));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));

        var body = await response.Content.ReadAsStringAsync();
        using var doc = JsonDocument.Parse(body);
        Assert.That(doc.RootElement.GetProperty("title_image_id").GetString(), Is.EqualTo("0"));
    }

    [Test]
    public async Task GameStart_with_authed_viewer_returns_spec_shape()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using var client = factory.CreateAuthenticatedClient(viewerId);

        var response = await client.PostAsync("/check/game_start",
            new StringContent(GameStartRequestJson, Encoding.UTF8, "application/json"));

        var body = await response.Content.ReadAsStringAsync();
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);

        using var doc = JsonDocument.Parse(body);
        var root = doc.RootElement;

        // now_tutorial_step is a STRING on the wire (prod sends "100"); client calls .ToInt().
        Assert.That(root.GetProperty("now_tutorial_step").GetString(), Is.EqualTo("100"),
            "RegisterViewer's seed-config default sets tutorial_state=100 (tutorial complete).");
        Assert.That(root.GetProperty("tos_state").GetInt32(), Is.EqualTo(1));
        Assert.That(root.GetProperty("policy_state").GetInt32(), Is.EqualTo(1));
        Assert.That(root.GetProperty("kor_authority_state").GetInt32(), Is.EqualTo(0));
        Assert.That(root.GetProperty("tos_id").GetInt32(), Is.EqualTo(1));
        Assert.That(root.GetProperty("policy_id").GetInt32(), Is.EqualTo(1));
        Assert.That(root.GetProperty("kor_authority_id").GetInt32(), Is.EqualTo(0));

        // Prod-shape fields (not strictly read by GameStartCheckTask.Parse but sent by prod).
        Assert.That(root.GetProperty("now_viewer_id").GetInt64(), Is.GreaterThan(0));
        Assert.That(root.GetProperty("now_name").GetString(), Is.Not.Empty);
        Assert.That(root.GetProperty("now_rank").ValueKind, Is.EqualTo(JsonValueKind.Object));

        // Steam connection should round-trip into transition_account_data — all three fields
        // serialized as strings (matches prod wire shape).
        var transitions = root.GetProperty("transition_account_data");
        Assert.That(transitions.ValueKind, Is.EqualTo(JsonValueKind.Array));
        Assert.That(transitions.GetArrayLength(), Is.EqualTo(1),
            "Seeded viewer has exactly one Steam social account connection.");
        Assert.That(transitions[0].GetProperty("social_account_type").GetString(),
            Is.EqualTo(((int)SVSim.Database.Enums.SocialAccountType.Steam).ToString()));
        Assert.That(transitions[0].GetProperty("social_account_id").GetString(), Is.Not.Empty);
        Assert.That(transitions[0].GetProperty("connected_viewer_id").GetString(), Is.Not.Empty);
    }

    [Test]
    public async Task GameStart_does_not_expose_unsettable_optional_fields()
    {
        // GameStartCheckTask.Parse uses `Keys.Contains("rewrite_viewer_id")` + `.ToInt()` with
        // no null guard, and same for `account_delete_reservation_status` (presence-only check).
        // We can't omit nullable properties on the encrypted MessagePack path — the [Key]
        // formatter writes them as Nil unconditionally. So these keys must not exist on
        // GameStartResponse at all. If a future change re-adds them, this test breaks the build.
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using var client = factory.CreateAuthenticatedClient(viewerId);

        var response = await client.PostAsync("/check/game_start",
            new StringContent(GameStartRequestJson, Encoding.UTF8, "application/json"));

        var body = await response.Content.ReadAsStringAsync();
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);

        using var doc = JsonDocument.Parse(body);
        var root = doc.RootElement;
        Assert.That(root.TryGetProperty("rewrite_viewer_id", out _), Is.False,
            "rewrite_viewer_id must NOT be present in the response — client NREs on null .ToInt().");
        Assert.That(root.TryGetProperty("account_delete_reservation_status", out _), Is.False,
            "account_delete_reservation_status must NOT be present — presence triggers client behavior.");
    }

    [Test]
    public async Task GameStart_with_no_viewer_returns_401()
    {
        using var factory = new SVSimTestFactory();
        using var client = factory.CreateClient();

        var response = await client.PostAsync("/check/game_start",
            new StringContent(GameStartRequestJson, Encoding.UTF8, "application/json"));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.Unauthorized));
    }
}