using Newtonsoft.Json.Linq;

namespace OpenAC.MosswartMassacre.Tests.Backend;

public sealed class BackendSessionTests
{
    [Fact]
    public void A_command_for_this_character_runs_as_typed_on_the_next_tick()
    {
        using var harness = new PluginHarness("Mossy");
        harness.Login();

        harness.Receive("{\"player_name\":\"mossy\",\"command\":\"/a hello\"}");
        Assert.Empty(harness.Host.Automation.Chat.Submitted);

        harness.Tick(0.01);

        Assert.Equal(["/a hello"], harness.Host.Automation.Chat.Submitted);
    }

    [Fact]
    public void A_command_for_another_character_is_ignored()
    {
        using var harness = new PluginHarness("Mossy");
        harness.Login();

        harness.Receive("{\"player_name\":\"Horan\",\"command\":\"/a hello\"}");
        harness.Tick(0.01);

        Assert.Empty(harness.Host.Automation.Chat.Submitted);
    }

    [Fact]
    public void Commands_run_one_per_tick_in_arrival_order()
    {
        using var harness = new PluginHarness("Mossy");
        harness.Login();

        harness.Receive("{\"player_name\":\"Mossy\",\"command\":\"/one\"}");
        harness.Receive("{\"player_name\":\"Mossy\",\"command\":\"/two\"}");
        harness.Tick(0.01);
        Assert.Equal(["/one"], harness.Host.Automation.Chat.Submitted);
        harness.Tick(0.01);
        Assert.Equal(["/one", "/two"], harness.Host.Automation.Chat.Submitted);
    }

    [Fact]
    public void Radar_commands_toggle_the_radar_instead_of_chat()
    {
        using var harness = new PluginHarness("Mossy");
        harness.Login();
        var toggles = new List<bool>();
        harness.Session.RadarToggle = on => toggles.Add(on);

        harness.Receive("{\"player_name\":\"Mossy\",\"command\":\"start_radar\"}");
        harness.Receive("{\"player_name\":\"Mossy\",\"command\":\"stop_radar\"}");
        harness.Tick(0.01);
        harness.Tick(0.01);

        Assert.Equal([true, false], toggles);
        Assert.Empty(harness.Host.Automation.Chat.Submitted);
    }

    [Fact]
    public void Share_frames_go_to_the_share_handlers_whoever_they_name()
    {
        using var harness = new PluginHarness("Mossy");
        var seen = new List<string>();
        harness.Session.AddShareHandler(new RecordingShareHandler(seen));
        harness.Login();

        harness.Receive("{\"type\":\"share_vital_update\",\"character_name\":\"Horan\"}");

        Assert.Equal(["share_vital_update"], seen);
        harness.Tick(0.01);
        Assert.Empty(harness.Host.Automation.Chat.Submitted);
    }

    [Fact]
    public void Malformed_frames_are_skipped()
    {
        using var harness = new PluginHarness("Mossy");
        harness.Login();

        harness.Receive("not json");
        harness.Receive("[1,2,3]");
        harness.Tick(0.01);

        Assert.Empty(harness.Host.Automation.Chat.Submitted);
    }

    [Fact]
    public void Connecting_sets_the_per_connection_session_id()
    {
        using var harness = new PluginHarness("Mossy");
        harness.Login();

        harness.Session.OnConnected(new DateTime(2026, 9, 25, 8, 5, 9, DateTimeKind.Utc));

        Assert.Equal("Mossy-20260925-080509", harness.Context.ConnectionSessionId);
    }

    private sealed class RecordingShareHandler(List<string> seen) : IShareFrameHandler
    {
        public void HandleShareFrame(string type, JObject frame) => seen.Add(type);
    }
}