/*
 * Copyright (c) 2012-2025 Daniele Bartolini et al.
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

using Gee;

namespace Crown
{
public class TransformPropertyGrid : PropertyGrid
{
	// Widgets
	private EntryPosition _position;
	private EntryRotation _rotation;
	private EntryScale _scale;

	public TransformPropertyGrid(Database db)
	{
		base(db);

		// Widgets
		_position = new EntryPosition();
		_position.value_changed.connect(on_value_changed);
		_rotation = new EntryRotation();
		_rotation.value_changed.connect(on_value_changed);
		_scale = new EntryScale();
		_scale.value_changed.connect(on_value_changed);

		add_row("Position", _position);
		add_row("Rotation", _rotation);
		add_row("Scale", _scale);
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_vector3   (_component_id, "data.position", _position.value);
		unit.set_component_property_quaternion(_component_id, "data.rotation", _rotation.value);
		unit.set_component_property_vector3   (_component_id, "data.scale", _scale.value);

		_db.add_restore_point((int)ActionType.SET_TRANSFORM, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		_position.value = unit.get_component_property_vector3   (_component_id, "data.position");
		_rotation.value = unit.get_component_property_quaternion(_component_id, "data.rotation");
		_scale.value    = unit.get_component_property_vector3   (_component_id, "data.scale");
	}
}

public class MeshRendererPropertyGrid : PropertyGrid
{
	// Widgets
	private Project _project;
	private ResourceChooserButton _scene;
	private ComboBoxMap _node;
	private ResourceChooserButton _material;
	private CheckBox _visible;

	private void decode(Hashtable mesh_resource)
	{
		const string keys[] = { "nodes" };
		ComboBoxMap combos[] = { _node };

		for (int i = 0; i < keys.length; ++i) {
			combos[i].clear();

			Mesh mesh = Mesh();
			mesh.decode(mesh_resource);
			foreach (var node in mesh._nodes)
				combos[i].append(node, node);
		}
	}

	private void decode_from_resource(string type, string name)
	{
		try {
			string path = ResourceId.path(type, name);
			decode(SJSON.load_from_path(_project.absolute_path(path)));
		} catch (JsonSyntaxError e) {
			loge(e.message);
		}
	}

	public MeshRendererPropertyGrid(Database db, ProjectStore store)
	{
		base(db);

		_project = store._project;

		// Widgets
		_scene = new ResourceChooserButton(store, "mesh");
		_scene.value_changed.connect(on_scene_value_changed);
		_node = new ComboBoxMap();
		_material = new ResourceChooserButton(store, "material");
		_material.value_changed.connect(on_value_changed);
		_visible = new CheckBox();
		_visible.value_changed.connect(on_value_changed);

		add_row("Scene", _scene);
		add_row("Node", _node);
		add_row("Material", _material);
		add_row("Visible", _visible);
	}

	private void on_scene_value_changed()
	{
		decode_from_resource("mesh", _scene.value);
		_node.value = _node.any_valid_id();
		on_value_changed();
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_string(_component_id, "data.mesh_resource", _scene.value);
		unit.set_component_property_string(_component_id, "data.geometry_name", _node.value);
		unit.set_component_property_string(_component_id, "data.material", _material.value);
		unit.set_component_property_bool  (_component_id, "data.visible", _visible.value);

		_db.add_restore_point((int)ActionType.SET_MESH, new Guid?[] { _id, _component_id });
	}

	private void update_mesh_and_geometry(Unit unit)
	{
		_scene.value = unit.get_component_property_string(_component_id, "data.mesh_resource");
		decode_from_resource("mesh", _scene.value);
		_node.value = unit.get_component_property_string(_component_id, "data.geometry_name");
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		update_mesh_and_geometry(unit);
		_material.value = unit.get_component_property_string(_component_id, "data.material");
		_visible.value  = unit.get_component_property_bool  (_component_id, "data.visible");
	}
}

public class SpriteRendererPropertyGrid : PropertyGrid
{
	// Widgets
	private ResourceChooserButton _sprite_resource;
	private ResourceChooserButton _material;
	private EntryDouble _layer;
	private EntryDouble _depth;
	private CheckBox _visible;

	public SpriteRendererPropertyGrid(Database db, ProjectStore store)
	{
		base(db);

		// Widgets
		_sprite_resource = new ResourceChooserButton(store, "sprite");
		_sprite_resource.value_changed.connect(on_value_changed);
		_material = new ResourceChooserButton(store, "material");
		_material.value_changed.connect(on_value_changed);
		_layer = new EntryDouble(0.0, 0.0, 7.0);
		_layer.value_changed.connect(on_value_changed);
		_depth = new EntryDouble(0.0, 0.0, (double)uint32.MAX);
		_depth.value_changed.connect(on_value_changed);
		_visible = new CheckBox();
		_visible.value_changed.connect(on_value_changed);

		add_row("Sprite", _sprite_resource);
		add_row("Material", _material);
		add_row("Layer", _layer);
		add_row("Depth", _depth);
		add_row("Visible", _visible);
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_string(_component_id, "data.sprite_resource", _sprite_resource.value);
		unit.set_component_property_string(_component_id, "data.material", _material.value);
		unit.set_component_property_double(_component_id, "data.layer", _layer.value);
		unit.set_component_property_double(_component_id, "data.depth", _depth.value);
		unit.set_component_property_bool  (_component_id, "data.visible", _visible.value);

		_db.add_restore_point((int)ActionType.SET_SPRITE, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		_sprite_resource.value = unit.get_component_property_string(_component_id, "data.sprite_resource");
		_material.value        = unit.get_component_property_string(_component_id, "data.material");
		_layer.value           = unit.get_component_property_double(_component_id, "data.layer");
		_depth.value           = unit.get_component_property_double(_component_id, "data.depth");
		_visible.value         = unit.get_component_property_bool  (_component_id, "data.visible");
	}
}

public class LightPropertyGrid : PropertyGrid
{
	// Widgets
	private ComboBoxMap _type;
	private EntryDouble _range;
	private EntryDouble _intensity;
	private EntryDouble _spot_angle;
	private ColorButtonVector3 _color;

	public LightPropertyGrid(Database db)
	{
		base(db);

		// Widgets
		_type = new ComboBoxMap();
		_type.value_changed.connect(on_value_changed);
		_type.append("directional", "Directional");
		_type.append("omni", "Omni");
		_type.append("spot", "Spot");
		_range = new EntryDouble(0.0, 0.0, double.MAX);
		_range.value_changed.connect(on_value_changed);
		_intensity = new EntryDouble(0.0, 0.0,  double.MAX);
		_intensity.value_changed.connect(on_value_changed);
		_spot_angle = new EntryDouble(0.0, 0.0,  90.0);
		_spot_angle.value_changed.connect(on_value_changed);
		_color = new ColorButtonVector3();
		_color.value_changed.connect(on_value_changed);

		add_row("Type", _type);
		add_row("Range", _range);
		add_row("Intensity", _intensity);
		add_row("Spot Angle", _spot_angle);
		add_row("Color", _color);
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_string (_component_id, "data.type",       _type.value);
		unit.set_component_property_double (_component_id, "data.range",      _range.value);
		unit.set_component_property_double (_component_id, "data.intensity",  _intensity.value);
		unit.set_component_property_double (_component_id, "data.spot_angle", _spot_angle.value * (Math.PI/180.0));
		unit.set_component_property_vector3(_component_id, "data.color",      _color.value);

		_db.add_restore_point((int)ActionType.SET_LIGHT, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		_type.value       = unit.get_component_property_string (_component_id, "data.type");
		_range.value      = unit.get_component_property_double (_component_id, "data.range");
		_intensity.value  = unit.get_component_property_double (_component_id, "data.intensity");
		_spot_angle.value = unit.get_component_property_double (_component_id, "data.spot_angle") * (180.0/Math.PI);
		_color.value      = unit.get_component_property_vector3(_component_id, "data.color");
	}
}

public class CameraPropertyGrid : PropertyGrid
{
	// Widgets
	private ComboBoxMap _projection;
	private EntryDouble _fov;
	private EntryDouble _near_range;
	private EntryDouble _far_range;

	public CameraPropertyGrid(Database db)
	{
		base(db);

		// Widgets
		_projection = new ComboBoxMap();
		_projection.append("orthographic", "Orthographic");
		_projection.append("perspective", "Perspective");
		_projection.value_changed.connect(on_value_changed);
		_fov = new EntryDouble(0.0, 1.0,   90.0);
		_fov.value_changed.connect(on_value_changed);
		_near_range = new EntryDouble(0.001, double.MIN, double.MAX);
		_near_range.value_changed.connect(on_value_changed);
		_far_range  = new EntryDouble(1000.000, double.MIN, double.MAX);
		_far_range.value_changed.connect(on_value_changed);

		add_row("Projection", _projection);
		add_row("FOV", _fov);
		add_row("Near Range", _near_range);
		add_row("Far Range", _far_range);
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_string(_component_id, "data.projection", _projection.value);
		unit.set_component_property_double(_component_id, "data.fov", _fov.value * (Math.PI/180.0));
		unit.set_component_property_double(_component_id, "data.near_range", _near_range.value);
		unit.set_component_property_double(_component_id, "data.far_range", _far_range.value);

		_db.add_restore_point((int)ActionType.SET_CAMERA, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		_projection.value = unit.get_component_property_string(_component_id, "data.projection");
		_fov.value        = unit.get_component_property_double(_component_id, "data.fov") * (180.0/Math.PI);
		_near_range.value = unit.get_component_property_double(_component_id, "data.near_range");
		_far_range.value  = unit.get_component_property_double(_component_id, "data.far_range");
	}
}

public class ColliderPropertyGrid : PropertyGrid
{
	// Widgets.
	private Project _project;
	private ComboBoxMap _source;
	private ResourceChooserButton _scene;
	private ComboBoxMap _node;
	private ComboBoxMap _shape;
	// Inline colliders.
	private EntryPosition _position;
	private EntryRotation _rotation;
	private EntryVector3 _half_extents; // Box only.
	private EntryDouble _radius;        // Sphere and capsule only.
	private EntryDouble _height;        // Capsule only.

	private void decode(Hashtable mesh_resource)
	{
		const string keys[] = { "nodes" };
		ComboBoxMap combos[] = { _node };

		for (int i = 0; i < keys.length; ++i) {
			combos[i].clear();

			Mesh mesh = Mesh();
			mesh.decode(mesh_resource);
			foreach (var node in mesh._nodes)
				combos[i].append(node, node);
		}
	}

	private void decode_from_resource(string type, string name)
	{
		try {
			string path = ResourceId.path(type, name);
			decode(SJSON.load_from_path(_project.absolute_path(path)));
		} catch (JsonSyntaxError e) {
			loge(e.message);
		}
	}

	public ColliderPropertyGrid(Database db, ProjectStore store)
	{
		base(db);

		_project = store._project;

		// Widgets.
		_source = new ComboBoxMap();
		_source.append("inline", "inline");
		_source.append("mesh", "mesh");
		_source.value_changed.connect(on_source_value_changed);
		_scene = new ResourceChooserButton(store, "mesh");
		_scene.value_changed.connect(on_scene_value_changed);
		_node = new ComboBoxMap();
		_node.value_changed.connect(on_value_changed);
		_shape = new ComboBoxMap();
		_shape.append("sphere", "sphere");
		_shape.append("capsule", "capsule");
		_shape.append("box", "box");
		_shape.append("convex_hull", "convex_hull");
		_shape.append("mesh", "mesh");
		_shape.value_changed.connect(on_shape_value_changed);

		_position = new EntryPosition();
		_position.value_changed.connect(on_value_changed);
		_rotation = new EntryRotation();
		_rotation.value_changed.connect(on_value_changed);
		_half_extents = new EntryVector3(Vector3(0.5, 0.5, 0.5), VECTOR3_ZERO, VECTOR3_MAX);
		_half_extents.value_changed.connect(on_value_changed);
		_radius = new EntryDouble(0.5, 0.0, double.MAX);
		_radius.value_changed.connect(on_value_changed);
		_height = new EntryDouble(1.0, 0.0, double.MAX);
		_height.value_changed.connect(on_value_changed);

		add_row("Source", _source);
		add_row("Scene", _scene);
		add_row("Node", _node);

		add_row("Shape", _shape);
		add_row("Position", _position);
		add_row("Rotation", _rotation);
		add_row("Half Extents", _half_extents);
		add_row("Radius", _radius);
		add_row("Height", _height);
	}

	private void on_source_value_changed()
	{
		if (_source.value == "inline") {
			_shape.value = _shape.any_valid_id();
		} else if (_source.value == "mesh") {
			_scene.value = "core/units/primitives/cube";
			decode_from_resource("mesh", _scene.value);
			_node.value = "Cube";
			_shape.value = "mesh";
		} else {
			assert(false);
		}

		enable_disable_properties();
		on_value_changed();
	}

	private void on_scene_value_changed()
	{
		decode_from_resource("mesh", _scene.value);
		_node.value = _node.any_valid_id();

		on_value_changed();
	}

	private void on_shape_value_changed()
	{
		enable_disable_properties();
		on_value_changed();
	}

	private void enable_disable_properties()
	{
		if (_source.value == "inline") {
			_scene.sensitive = false;
			_node.sensitive = false;
			_position.sensitive = true;
			_rotation.sensitive = true;

			if (_shape.value == "sphere") {
				_half_extents.sensitive = false;
				_radius.sensitive = true;
				_height.sensitive = false;
			} else if (_shape.value == "capsule") {
				_half_extents.sensitive = false;
				_radius.sensitive = true;
				_height.sensitive = true;
			} else if (_shape.value == "box") {
				_half_extents.sensitive = true;
				_radius.sensitive = false;
				_height.sensitive = false;
			} else {
				_position.sensitive = false;
				_rotation.sensitive = false;
				_half_extents.sensitive = false;
				_radius.sensitive = false;
				_height.sensitive = false;
			}
		} else if (_source.value == "mesh") {
			_scene.sensitive = true;
			_node.sensitive = true;
			_position.sensitive = false;
			_rotation.sensitive = false;
			_half_extents.sensitive = false;
			_radius.sensitive = false;
			_height.sensitive = false;
		} else {
			assert(false);
		}
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_string(_component_id, "data.source", _source.value);
		unit.set_component_property_string(_component_id, "data.scene", _scene.value);
		unit.set_component_property_string(_component_id, "data.name", _node.value);
		unit.set_component_property_string(_component_id, "data.shape", _shape.value);
		unit.set_component_property_vector3(_component_id, "data.collider_data.position", _position.value);
		unit.set_component_property_quaternion(_component_id, "data.collider_data.rotation", _rotation.value);
		unit.set_component_property_vector3(_component_id, "data.collider_data.half_extents", _half_extents.value);
		unit.set_component_property_double(_component_id, "data.collider_data.radius", _radius.value);
		unit.set_component_property_double(_component_id, "data.collider_data.height", _height.value);

		_db.add_restore_point((int)ActionType.SET_COLLIDER, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);

		if (unit.get_component_property(_component_id, "data.source") == null)
			_source.value = "mesh";
		else
			_source.value = unit.get_component_property_string(_component_id, "data.source");

		if (unit.get_component_property(_component_id, "data.scene") == null) {
			_scene.value = "core/units/primitives/cube";
			decode_from_resource("mesh", _scene.value);
			_node.value  = _node.any_valid_id();
		} else {
			_scene.value = unit.get_component_property_string(_component_id, "data.scene");
			decode_from_resource("mesh", _scene.value);
			_node.value = unit.get_component_property_string(_component_id, "data.name");
		}

		_shape.value = unit.get_component_property_string(_component_id, "data.shape");

		if (unit.get_component_property(_component_id, "data.collider_data.position") != null)
			_position.value = unit.get_component_property_vector3(_component_id, "data.collider_data.position");
		if (unit.get_component_property(_component_id, "data.collider_data.rotation") != null)
			_rotation.value = unit.get_component_property_quaternion(_component_id, "data.collider_data.rotation");
		if (unit.get_component_property(_component_id, "data.collider_data.half_extents") != null)
			_half_extents.value = unit.get_component_property_vector3(_component_id, "data.collider_data.half_extents");
		if (unit.get_component_property(_component_id, "data.collider_data.radius") != null)
			_radius.value = unit.get_component_property_double(_component_id, "data.collider_data.radius");
		if (unit.get_component_property(_component_id, "data.collider_data.height") != null)
			_height.value = unit.get_component_property_double(_component_id, "data.collider_data.height");

		enable_disable_properties();
	}
}

public class ActorPropertyGrid : PropertyGrid
{
	// Widgets
	private Project _project;
	private ComboBoxMap _class;
	private ComboBoxMap _collision_filter;
	private EntryDouble _mass;
	private ComboBoxMap _material;
	private CheckBox3 _lock_translation;
	private CheckBox3 _lock_rotation;

	private void decode_global_physics_config(Hashtable global)
	{
		const string keys[] = { "actors", "collision_filters", "materials" };
		ComboBoxMap combos[] = { _class, _collision_filter, _material };

		for (int i = 0; i < keys.length; ++i) {
			combos[i].clear();
			if (global.has_key(keys[i])) {
				Hashtable obj = (Hashtable)global[keys[i]];
				foreach (var e in obj)
					combos[i].append(e.key, e.key);
			}
		}

		if (_id != GUID_ZERO)
			update();
	}

	private void on_project_file_added_or_changed(string type, string name, uint64 size, uint64 mtime)
	{
		if (type != "physics_config" || name != "global")
			return;

		string path = ResourceId.path("physics_config", "global");
		try {
			Hashtable global = SJSON.load_from_path(_project.absolute_path(path));
			decode_global_physics_config(global);
		} catch (JsonSyntaxError e) {
			loge(e.message);
		}
	}

	private void on_project_file_removed(string type, string name)
	{
		if (type != "physics_config" || name != "global")
			return;

		decode_global_physics_config(new Hashtable());
	}

	public ActorPropertyGrid(Database db, Project prj)
	{
		base(db);

		_project = prj;

		// Widgets
		_class = new ComboBoxMap();
		_class.value_changed.connect(on_value_changed);
		_collision_filter = new ComboBoxMap();
		_collision_filter.value_changed.connect(on_value_changed);
		_material = new ComboBoxMap();
		_material.value_changed.connect(on_value_changed);
		_mass = new EntryDouble(1.0, 0.0, double.MAX);
		_mass.value_changed.connect(on_value_changed);
		_lock_translation = new CheckBox3();
		_lock_translation.value_changed.connect(on_value_changed);
		_lock_rotation = new CheckBox3();
		_lock_rotation.value_changed.connect(on_value_changed);

		add_row("Class", _class);
		add_row("Collision Filter", _collision_filter);
		add_row("Material", _material);
		add_row("Mass", _mass);
		add_row("Lock Translation", _lock_translation);
		add_row("Lock Rotation", _lock_rotation);

		prj.file_added.connect(on_project_file_added_or_changed);
		prj.file_changed.connect(on_project_file_added_or_changed);
		prj.file_removed.connect(on_project_file_removed);
	}

	private bool get_component_property_bool_optional(Unit unit, Guid component_id, string key)
	{
		return unit.get_component_property(component_id, key) != null
			? (bool)unit.get_component_property_bool(component_id, key)
			: false
			;
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		if (!_class.is_inconsistent() && _class.value != null)
			unit.set_component_property_string(_component_id, "data.class", _class.value);
		if (!_collision_filter.is_inconsistent() && _collision_filter.value != null)
			unit.set_component_property_string(_component_id, "data.collision_filter", _collision_filter.value);
		if (!_material.is_inconsistent() && _material.value != null)
			unit.set_component_property_string(_component_id, "data.material", _material.value);
		unit.set_component_property_double(_component_id, "data.mass", _mass.value);
		unit.set_component_property_bool  (_component_id, "data.lock_translation_x", _lock_translation._x.value);
		unit.set_component_property_bool  (_component_id, "data.lock_translation_y", _lock_translation._y.value);
		unit.set_component_property_bool  (_component_id, "data.lock_translation_z", _lock_translation._z.value);
		unit.set_component_property_bool  (_component_id, "data.lock_rotation_x", _lock_rotation._x.value);
		unit.set_component_property_bool  (_component_id, "data.lock_rotation_y", _lock_rotation._y.value);
		unit.set_component_property_bool  (_component_id, "data.lock_rotation_z", _lock_rotation._z.value);

		_db.add_restore_point((int)ActionType.SET_ACTOR, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		_class.value               = unit.get_component_property_string(_component_id, "data.class");
		_collision_filter.value    = unit.get_component_property_string(_component_id, "data.collision_filter");
		_material.value            = unit.get_component_property_string(_component_id, "data.material");
		_mass.value                = unit.get_component_property_double(_component_id, "data.mass");
		_lock_translation._x.value = get_component_property_bool_optional(unit, _component_id, "data.lock_translation_x");
		_lock_translation._y.value = get_component_property_bool_optional(unit, _component_id, "data.lock_translation_y");
		_lock_translation._z.value = get_component_property_bool_optional(unit, _component_id, "data.lock_translation_z");
		_lock_rotation._x.value    = get_component_property_bool_optional(unit, _component_id, "data.lock_rotation_x");
		_lock_rotation._y.value    = get_component_property_bool_optional(unit, _component_id, "data.lock_rotation_y");
		_lock_rotation._z.value    = get_component_property_bool_optional(unit, _component_id, "data.lock_rotation_z");
	}
}

public class ScriptPropertyGrid : PropertyGrid
{
	// Widgets
	private ResourceChooserButton _script_resource;

	public ScriptPropertyGrid(Database db, ProjectStore store)
	{
		base(db);

		// Widgets
		_script_resource = new ResourceChooserButton(store, "lua");
		_script_resource.value_changed.connect(on_value_changed);

		add_row("Script", _script_resource);
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_string(_component_id, "data.script_resource", _script_resource.value);

		_db.add_restore_point((int)ActionType.SET_SCRIPT, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		_script_resource.value = unit.get_component_property_string(_component_id, "data.script_resource");
	}
}

public class AnimationStateMachine : PropertyGrid
{
	// Widgets
	private ResourceChooserButton _state_machine_resource;

	public AnimationStateMachine(Database db, ProjectStore store)
	{
		base(db);

		// Widgets
		_state_machine_resource = new ResourceChooserButton(store, "state_machine");
		_state_machine_resource.value_changed.connect(on_value_changed);

		add_row("State Machine", _state_machine_resource);
	}

	private void on_value_changed()
	{
		Unit unit = Unit(_db, _id);
		unit.set_component_property_string(_component_id, "data.state_machine_resource", _state_machine_resource.value);

		_db.add_restore_point((int)ActionType.SET_ANIMATION_STATE_MACHINE, new Guid?[] { _id, _component_id });
	}

	public override void update()
	{
		Unit unit = Unit(_db, _id);
		_state_machine_resource.value = unit.get_component_property_string(_component_id, "data.state_machine_resource");
	}
}

public class UnitView : PropertyGrid
{
	// Widgets
	private ProjectStore _store;
	private ResourceChooserButton _prefab;
	private Gtk.MenuButton _component_add;
	private Gtk.Box _components;
	private Gtk.Popover _add_popover;

	private void on_add_component_clicked(Gtk.Button button)
	{
		Gtk.Application app = ((Gtk.Window)this.get_toplevel()).application;
		app.activate_action("unit-add-component", new GLib.Variant.string(button.label));

		_add_popover.hide();
	}

	public static Gtk.Menu component_menu(string object_type)
	{
		Gtk.Menu menu = new Gtk.Menu();
		Gtk.MenuItem mi;

		mi = new Gtk.MenuItem.with_label("Remove Component");
		mi.activate.connect(() => {
				GLib.Application.get_default().activate_action("unit-remove-component", new GLib.Variant.string(object_type));
			});
		menu.add(mi);

		return menu;
	}

	public UnitView(Database db, ProjectStore store)
	{
		base(db);

		_store = store;

		// Widgets
		_prefab = new ResourceChooserButton(store, "unit");
		_prefab._selector.sensitive = false;

		// List of component types.
		const string components[] =
		{
			OBJECT_TYPE_TRANSFORM,
			OBJECT_TYPE_LIGHT,
			OBJECT_TYPE_CAMERA,
			OBJECT_TYPE_MESH_RENDERER,
			OBJECT_TYPE_SPRITE_RENDERER,
			OBJECT_TYPE_COLLIDER,
			OBJECT_TYPE_ACTOR,
			OBJECT_TYPE_SCRIPT,
			OBJECT_TYPE_ANIMATION_STATE_MACHINE
		};

		Gtk.Box add_box = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
		for (int cc = 0; cc < components.length; ++cc) {
			Gtk.Button mb;
			mb = new Gtk.Button.with_label(components[cc]);
			mb.clicked.connect(on_add_component_clicked);
			add_box.pack_start(mb);
		}
		add_box.show_all();
		_add_popover = new Gtk.Popover(null);
		_add_popover.add(add_box);

		_component_add = new Gtk.MenuButton();
		_component_add.label = "Add Component";
		_component_add.set_popover(_add_popover);

		_components = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 6);
		_components.homogeneous = true;
		_components.pack_start(_component_add);

		add_row("Prefab", _prefab);
		add_row("Components", _components);
	}

	public override void update()
	{
		if (_db.has_property(_id, "prefab")) {
			_prefab.value = _db.get_property_string(_id, "prefab");
		} else {
			_prefab.value = "<none>";
		}
	}
}

public class SoundTransformView : PropertyGrid
{
	// Widgets
	private EntryVector3 _position;
	private EntryRotation _rotation;

	public SoundTransformView(Database db)
	{
		base(db);

		// Widgets
		_position = new EntryPosition();
		_rotation = new EntryRotation();

		_position.value_changed.connect(on_value_changed);
		_rotation.value_changed.connect(on_value_changed);

		add_row("Position", _position);
		add_row("Rotation", _rotation);
	}

	private void on_value_changed()
	{
		_db.set_property_vector3   (_id, "position", _position.value);
		_db.set_property_quaternion(_id, "rotation", _rotation.value);

		_db.add_restore_point((int)ActionType.SET_SOUND, new Guid?[] { _id });
	}

	public override void update()
	{
		Vector3 pos    = _db.get_property_vector3   (_id, "position");
		Quaternion rot = _db.get_property_quaternion(_id, "rotation");

		_position.value = pos;
		_rotation.value = rot;
	}
}

public class SoundView : PropertyGrid
{
	// Widgets
	private ResourceChooserButton _name;
	private EntryDouble _range;
	private EntryDouble _volume;
	private CheckBox _loop;

	public SoundView(Database db, ProjectStore store)
	{
		base(db);

		// Widgets
		_name   = new ResourceChooserButton(store, "sound");
		_name.value_changed.connect(on_value_changed);
		_range  = new EntryDouble(1.0, 0.0, double.MAX);
		_range.value_changed.connect(on_value_changed);
		_volume = new EntryDouble(1.0, 0.0, 1.0);
		_volume.value_changed.connect(on_value_changed);
		_loop   = new CheckBox();
		_loop.value_changed.connect(on_value_changed);

		add_row("Name", _name);
		add_row("Range", _range);
		add_row("Volume", _volume);
		add_row("Loop", _loop);
	}

	private void on_value_changed()
	{
		_db.set_property_string(_id, "name", _name.value);
		_db.set_property_double(_id, "range", _range.value);
		_db.set_property_double(_id, "volume", _volume.value);
		_db.set_property_bool  (_id, "loop", _loop.value);

		_db.add_restore_point((int)ActionType.SET_SOUND, new Guid?[] { _id });
	}

	public override void update()
	{
		_name.value   = _db.get_property_string(_id, "name");
		_range.value  = _db.get_property_double(_id, "range");
		_volume.value = _db.get_property_double(_id, "volume");
		_loop.value   = _db.get_property_bool  (_id, "loop");
	}
}

public class PropertiesView : Gtk.Bin
{
	public struct ComponentEntry
	{
		string type;
		int position;
	}

	// Data
	private Database _db;
	private HashMap<string, Expander> _expanders;
	private HashMap<string, bool> _expander_states;
	private HashMap<string, PropertyGrid> _objects;
	private ArrayList<ComponentEntry?> _entries;
	private Gee.ArrayList<Guid?>? _selection;

	// Widgets
	private Gtk.Label _nothing_to_show;
	private Gtk.Label _unknown_object_type;
	private Gtk.Viewport _viewport;
	private Gtk.ScrolledWindow _scrolled_window;
	private PropertyGridSet _object_view;
	private Gtk.Stack _stack;

	[CCode (has_target = false)]
	public delegate Gtk.Menu ContextMenu(string object_type);

	public PropertiesView(Database db, ProjectStore store)
	{
		// Data
		_db = db;

		_expanders = new HashMap<string, Expander>();
		_expander_states = new HashMap<string, bool>();
		_objects = new HashMap<string, PropertyGrid>();
		_entries = new ArrayList<ComponentEntry?>();
		_selection = null;

		// Widgets
		_object_view = new PropertyGridSet();
		_object_view.border_width = 6;

		// Unit
		register_object_type("Unit",                    "name",                              0, new UnitView(_db, store));
		register_object_type("Transform",               OBJECT_TYPE_TRANSFORM,               0, new TransformPropertyGrid(_db),             UnitView.component_menu);
		register_object_type("Light",                   OBJECT_TYPE_LIGHT,                   1, new LightPropertyGrid(_db),                 UnitView.component_menu);
		register_object_type("Camera",                  OBJECT_TYPE_CAMERA,                  2, new CameraPropertyGrid(_db),                UnitView.component_menu);
		register_object_type("Mesh Renderer",           OBJECT_TYPE_MESH_RENDERER,           3, new MeshRendererPropertyGrid(_db, store),   UnitView.component_menu);
		register_object_type("Sprite Renderer",         OBJECT_TYPE_SPRITE_RENDERER,         3, new SpriteRendererPropertyGrid(_db, store), UnitView.component_menu);
		register_object_type("Collider",                OBJECT_TYPE_COLLIDER,                3, new ColliderPropertyGrid(_db, store),       UnitView.component_menu);
		register_object_type("Actor",                   OBJECT_TYPE_ACTOR,                   3, new ActorPropertyGrid(_db, store._project), UnitView.component_menu);
		register_object_type("Script",                  OBJECT_TYPE_SCRIPT,                  3, new ScriptPropertyGrid(_db, store),         UnitView.component_menu);
		register_object_type("Animation State Machine", OBJECT_TYPE_ANIMATION_STATE_MACHINE, 3, new AnimationStateMachine(_db, store),      UnitView.component_menu);

		// Sound
		register_object_type("Transform", "sound_transform",  0, new SoundTransformView(_db));
		register_object_type("Sound",     "sound_properties", 1, new SoundView(_db, store));

		_nothing_to_show = new Gtk.Label("Select an object to start editing");
		_unknown_object_type = new Gtk.Label("Unknown object type");

		_viewport = new Gtk.Viewport(null, null);
		_viewport.add(_object_view);

		_scrolled_window = new Gtk.ScrolledWindow(null, null);
		_scrolled_window.add(_viewport);

		_stack = new Gtk.Stack();
		_stack.add(_nothing_to_show);
		_stack.add(_scrolled_window);
		_stack.add(_unknown_object_type);

		this.add(_stack);
		this.get_style_context().add_class("properties-view");

		store._project.project_reset.connect(on_project_reset);
	}

	private void register_object_type(string label, string object_type, int position, PropertyGrid cv, ContextMenu? action = null)
	{
		Expander expander = _object_view.add_property_grid(cv, label);
		if (action != null) {
			expander.button_release_event.connect((ev) => {
					if (ev.button == Gdk.BUTTON_SECONDARY) {
						Gtk.Menu menu = action(object_type);
						menu.show_all();
						menu.popup_at_pointer(ev);
						return Gdk.EVENT_STOP;
					}

					return Gdk.EVENT_PROPAGATE;
				});
		}

		_objects[object_type] = cv;
		_expanders[object_type] = expander;
		_entries.add({ object_type, position });
	}

	public void show_unit(Guid id)
	{
		foreach (var entry in _entries) {
			Expander expander = _expanders[entry.type];
			_expander_states[entry.type] = expander.expanded;
		}
		_stack.set_visible_child(_scrolled_window);

		foreach (var entry in _entries) {
			Expander expander = _expanders[entry.type];
			bool was_expanded = _expander_states.has_key(entry.type) ? _expander_states[entry.type] : false;

			Unit unit = Unit(_db, id);
			Guid component_id;
			Guid owner_id;
			if (unit.has_component_with_owner(out component_id, out owner_id, entry.type) || entry.type == "name") {
				PropertyGrid cv = _objects[entry.type];
				cv._id = id;
				cv._component_id = component_id;
				cv.update();

				if (id == owner_id)
					expander.get_style_context().remove_class("inherited");
				else
					expander.get_style_context().add_class("inherited");

				expander.show();
				expander.expanded = was_expanded;
			} else {
				expander.hide();
			}
		}
	}

	public void show_sound_source(Guid id)
	{
		foreach (var entry in _entries) {
			Expander expander = _expanders[entry.type];
			_expander_states[entry.type] = expander.expanded;
		}

		_stack.set_visible_child(_scrolled_window);

		foreach (var entry in _entries) {
			Expander expander = _expanders[entry.type];

			if (entry.type == "sound_transform" || entry.type == "sound_properties") {
				bool was_expanded = _expander_states.has_key(entry.type) ? _expander_states[entry.type] : false;

				PropertyGrid cv = _objects[entry.type];
				cv._id = id;
				cv.update();

				expander.show();
				expander.expanded = was_expanded;
			} else {
				expander.hide();
			}
		}
	}

	public void show_or_hide_properties()
	{
		if (_selection == null || _selection.size != 1) {
			_stack.set_visible_child(_nothing_to_show);
			return;
		}

		Guid id = _selection[_selection.size - 1];
		if (!_db.has_object(id))
			return;

		if (_db.object_type(id) == OBJECT_TYPE_UNIT)
			show_unit(id);
		else if (_db.object_type(id) == OBJECT_TYPE_SOUND_SOURCE)
			show_sound_source(id);
		else
			_stack.set_visible_child(_unknown_object_type);
	}

	public void on_selection_changed(Gee.ArrayList<Guid?> selection)
	{
		_selection = selection;
		show_or_hide_properties();
	}

	public override void map()
	{
		base.map();
		show_or_hide_properties();
	}

	public void on_project_reset()
	{
		foreach (var obj in _objects) {
			PropertyGrid cv = obj.value;
			cv._id = GUID_ZERO;
			cv._component_id = GUID_ZERO;
		}
	}
}

} /* namespace Crown */