using Godot;

// Dev tool (not shipped gameplay): renders a few overview screenshots of the playground to
// user-supplied paths. godot-mono --path . tools/playground_shots.tscn -- <outdir>
public partial class PlaygroundShots : Node3D
{
    private int _frame;
    private int _shot;
    private Camera3D _cam;
    private string _dir = "user://";
    private readonly (Vector3 Pos, Vector3 Look)[] _views =
    {
        (new Vector3(0f, 9f, 14f), new Vector3(0f, 0f, -1f)),
        (new Vector3(3f, 4f, 3f), new Vector3(9f, 1f, -4f)),
        (new Vector3(-2f, 3.5f, 4f), new Vector3(-7f, 1f, -1f)),
        (new Vector3(0f, 2.5f, 11f), new Vector3(1f, 0.6f, 7f)),
        // The crag: from spawn eye height, from the side, the route up close, looking down from the summit.
        (new Vector3(0f, 1.7f, 2.5f), new Vector3(-1f, 9f, -14f)),
        (new Vector3(22f, 14f, 4f), new Vector3(0f, 12f, -16f)),
        (new Vector3(-1f, 12f, -6f), new Vector3(-1f, 12f, -15f)),
        (new Vector3(-0.8f, 27.7f, -16.4f), new Vector3(1.5f, 0f, -6f)),
    };

    public override void _Ready()
    {
        foreach (string a in OS.GetCmdlineUserArgs())
            _dir = a;
        AddChild(new DirectionalLight3D { DirectionalShadowMaxDistance = 60f, RotationDegrees = new Vector3(-50f, -30f, 0f), ShadowEnabled = true });
        AddChild(new WorldEnvironment { Environment = new Environment { BackgroundMode = Environment.BGMode.Color, BackgroundColor = new Color(0.55f, 0.65f, 0.8f), AmbientLightSource = Environment.AmbientSource.Color, AmbientLightColor = new Color(0.5f, 0.5f, 0.55f) } });
        StaticBody3D floor = new();
        floor.AddChild(new CollisionShape3D { Shape = new BoxShape3D { Size = new Vector3(80, 0.1f, 80) }, Position = new Vector3(0, -0.05f, 0) });
        floor.AddChild(new MeshInstance3D { Mesh = new PlaneMesh { Size = new Vector2(80, 80) } });
        AddChild(floor);
        AddChild(new Playground());
        AddChild(new Crag());
        _cam = new Camera3D { Current = true };
        AddChild(_cam);
        SetView();
    }

    private void SetView() => _cam.LookAtFromPosition(_views[_shot].Pos, _views[_shot].Look);

    public override void _Process(double delta)
    {
        if (++_frame < 30)
            return;
        GetViewport().GetTexture().GetImage().SavePng($"{_dir}/view{_shot}.png");
        _frame = 0;
        if (++_shot >= _views.Length)
        {
            GetTree().Quit();
            return;
        }
        SetView();
    }
}