using System.Text.Json.Serialization;

namespace Backend;

// -------- Client → Server --------

/// <summary>Cursor position update from the browser.</summary>
public sealed class CursorMessage
{
    [JsonPropertyName("type")] public string Type { get; set; } = "cursor";
    [JsonPropertyName("x")]    public float X { get; set; }
    [JsonPropertyName("y")]    public float Y { get; set; }
}

// -------- Server → Client --------

/// <summary>Sent once on WebSocket open. Tells the client the world dimensions.</summary>
public sealed class InitFrame
{
    [JsonPropertyName("type")]  public string Type { get; set; } = "init";
    [JsonPropertyName("world")] public float[] World { get; set; } = new[] { 1f, 1f };
}

/// <summary>Sent every physics tick with the current ship pose and target.</summary>
public sealed class StateFrame
{
    [JsonPropertyName("type")]   public string Type { get; set; } = "state";
    [JsonPropertyName("x")]      public float X { get; set; }
    [JsonPropertyName("y")]      public float Y { get; set; }
    [JsonPropertyName("angle")]  public float Angle { get; set; }
    [JsonPropertyName("engine")] public int Engine { get; set; }
    [JsonPropertyName("target")] public float[] Target { get; set; } = new[] { 0.5f, 0.5f };
    [JsonPropertyName("step")]   public int Step { get; set; }
}

/// <summary>Source-gen JSON contracts.</summary>
[JsonSourceGenerationOptions(WriteIndented = false)]
[JsonSerializable(typeof(CursorMessage))]
[JsonSerializable(typeof(InitFrame))]
[JsonSerializable(typeof(StateFrame))]
internal partial class WireJsonContext : System.Text.Json.Serialization.JsonSerializerContext
{
}