/**************************************************************************/
/*  decal_gizmo_plugin.cpp                                                */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "decal_gizmo_plugin.h"

#include "editor/editor_node.h"
#include "editor/editor_settings.h"
#include "editor/editor_string_names.h"
#include "editor/editor_undo_redo_manager.h"
#include "editor/plugins/gizmos/gizmo_3d_helper.h"
#include "editor/plugins/node_3d_editor_plugin.h"
#include "scene/3d/decal.h"

DecalGizmoPlugin::DecalGizmoPlugin() {
	helper.instantiate();
	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/decal", Color(0.6, 0.5, 1.0));

	create_icon_material("decal_icon", EditorNode::get_singleton()->get_editor_theme()->get_icon(SNAME("GizmoDecal"), EditorStringName(EditorIcons)));

	create_material("decal_material", gizmo_color);

	create_handle_material("handles");
}

DecalGizmoPlugin::~DecalGizmoPlugin() {
}

bool DecalGizmoPlugin::has_gizmo(Node3D *p_spatial) {
	return Object::cast_to<Decal>(p_spatial) != nullptr;
}

String DecalGizmoPlugin::get_gizmo_name() const {
	return "Decal";
}

int DecalGizmoPlugin::get_priority() const {
	return -1;
}

String DecalGizmoPlugin::get_handle_name(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary) const {
	return helper->box_get_handle_name(p_id);
}

Variant DecalGizmoPlugin::get_handle_value(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary) const {
	Decal *decal = Object::cast_to<Decal>(p_gizmo->get_node_3d());
	return decal->get_size();
}

void DecalGizmoPlugin::begin_handle_action(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary) {
	helper->initialize_handle_action(get_handle_value(p_gizmo, p_id, p_secondary), p_gizmo->get_node_3d()->get_global_transform());
}

void DecalGizmoPlugin::set_handle(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary, Camera3D *p_camera, const Point2 &p_point) {
	Decal *decal = Object::cast_to<Decal>(p_gizmo->get_node_3d());
	Vector3 size = decal->get_size();

	Vector3 sg[2];
	helper->get_segment(p_camera, p_point, sg);

	Vector3 position;
	helper->box_set_handle(sg, p_id, size, position);
	decal->set_size(size);
	decal->set_global_position(position);
}

void DecalGizmoPlugin::commit_handle(const EditorNode3DGizmo *p_gizmo, int p_id, bool p_secondary, const Variant &p_restore, bool p_cancel) {
	helper->box_commit_handle(TTR("Change Decal Size"), p_cancel, p_gizmo->get_node_3d());
}

void DecalGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
	Decal *decal = Object::cast_to<Decal>(p_gizmo->get_node_3d());

	p_gizmo->clear();

	Vector<Vector3> lines;
	Vector3 size = decal->get_size();

	AABB aabb;
	aabb.position = -size / 2;
	aabb.size = size;

	for (int i = 0; i < 12; i++) {
		Vector3 a, b;
		aabb.get_edge(i, a, b);
		if (a.y == b.y) {
			lines.push_back(a);
			lines.push_back(b);
		} else {
			Vector3 ah = a.lerp(b, 0.2);
			lines.push_back(a);
			lines.push_back(ah);
			Vector3 bh = b.lerp(a, 0.2);
			lines.push_back(b);
			lines.push_back(bh);
		}
	}

	float half_size_y = size.y / 2;
	lines.push_back(Vector3(0, half_size_y, 0));
	lines.push_back(Vector3(0, half_size_y * 1.2, 0));

	Vector<Vector3> handles = helper->box_get_handles(decal->get_size());
	Ref<Material> material = get_material("decal_material", p_gizmo);
	const Ref<Material> icon = get_material("decal_icon", p_gizmo);

	p_gizmo->add_lines(lines, material);
	p_gizmo->add_unscaled_billboard(icon, 0.05);
	p_gizmo->add_handles(handles, get_material("handles"));
}