/*************************************************************************/
/*  cube_grid_theme_editor_plugin.cpp                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "cube_grid_theme_editor_plugin.h"

#include "editor/editor_node.h"
#include "editor/editor_settings.h"
#include "main/main.h"
#include "scene/3d/mesh_instance.h"
#include "scene/3d/navigation_mesh.h"
#include "scene/3d/physics_body.h"
#include "scene/main/viewport.h"
#include "scene/resources/packed_scene.h"

void MeshLibraryEditor::edit(const Ref<MeshLibrary> &p_theme) {

	theme = p_theme;
	if (theme.is_valid())
		menu->get_popup()->set_item_disabled(menu->get_popup()->get_item_index(MENU_OPTION_UPDATE_FROM_SCENE), !theme->has_meta("_editor_source_scene"));
}

void MeshLibraryEditor::_menu_confirm() {

	switch (option) {

		case MENU_OPTION_REMOVE_ITEM: {

			theme->remove_item(to_erase);
		} break;
		case MENU_OPTION_UPDATE_FROM_SCENE: {
			String existing = theme->get_meta("_editor_source_scene");
			ERR_FAIL_COND(existing == "");
			_import_scene_cbk(existing);

		} break;
		default: {};
	}
}

void MeshLibraryEditor::_import_scene(Node *p_scene, Ref<MeshLibrary> p_library, bool p_merge) {

	if (!p_merge)
		p_library->clear();

	for (int i = 0; i < p_scene->get_child_count(); i++) {

		Node *child = p_scene->get_child(i);

		if (!child->cast_to<MeshInstance>()) {
			if (child->get_child_count() > 0) {
				child = child->get_child(0);
				if (!child->cast_to<MeshInstance>()) {
					continue;
				}

			} else
				continue;
		}

		MeshInstance *mi = child->cast_to<MeshInstance>();
		Ref<Mesh> mesh = mi->get_mesh();
		if (mesh.is_null())
			continue;

		int id = p_library->find_item_name(mi->get_name());
		if (id < 0) {

			id = p_library->get_last_unused_item_id();
			p_library->create_item(id);
			p_library->set_item_name(id, mi->get_name());
		}

		p_library->set_item_mesh(id, mesh);

		Ref<Shape> collision;

		for (int j = 0; j < mi->get_child_count(); j++) {
#if 1
			Node *child2 = mi->get_child(j);
			if (!child2->cast_to<StaticBody>())
				continue;
			StaticBody *sb = child2->cast_to<StaticBody>();
			if (sb->get_shape_count() == 0)
				continue;
			collision = sb->get_shape(0);
			if (!collision.is_null())
				break;
#endif
		}

		if (!collision.is_null()) {

			p_library->set_item_shape(id, collision);
		}
		Ref<NavigationMesh> navmesh;
		for (int j = 0; j < mi->get_child_count(); j++) {
			Node *child2 = mi->get_child(j);
			if (!child2->cast_to<NavigationMeshInstance>())
				continue;
			NavigationMeshInstance *sb = child2->cast_to<NavigationMeshInstance>();
			navmesh = sb->get_navigation_mesh();
			if (!navmesh.is_null())
				break;
		}
		if (!navmesh.is_null()) {
			p_library->set_item_navmesh(id, navmesh);
		}
	}

	//generate previews!

	if (1) {
		Vector<int> ids = p_library->get_item_list();
		RID vp = VS::get_singleton()->viewport_create();
		VS::ViewportRect vr;
		vr.x = 0;
		vr.y = 0;
		vr.width = EditorSettings::get_singleton()->get("grid_map/preview_size");
		vr.height = EditorSettings::get_singleton()->get("grid_map/preview_size");
		VS::get_singleton()->viewport_set_rect(vp, vr);
		VS::get_singleton()->viewport_set_as_render_target(vp, true);
		VS::get_singleton()->viewport_set_render_target_update_mode(vp, VS::RENDER_TARGET_UPDATE_ALWAYS);
		RID scen = VS::get_singleton()->scenario_create();
		VS::get_singleton()->viewport_set_scenario(vp, scen);
		RID cam = VS::get_singleton()->camera_create();
		VS::get_singleton()->camera_set_transform(cam, Transform());
		VS::get_singleton()->viewport_attach_camera(vp, cam);
		RID light = VS::get_singleton()->light_create(VS::LIGHT_DIRECTIONAL);
		RID lightinst = VS::get_singleton()->instance_create2(light, scen);
		VS::get_singleton()->camera_set_orthogonal(cam, 1.0, 0.01, 1000.0);

		EditorProgress ep("mlib", TTR("Creating Mesh Library"), ids.size());

		for (int i = 0; i < ids.size(); i++) {

			int id = ids[i];
			Ref<Mesh> mesh = p_library->get_item_mesh(id);
			if (!mesh.is_valid())
				continue;
			AABB aabb = mesh->get_aabb();
			print_line("aabb: " + aabb);
			Vector3 ofs = aabb.pos + aabb.size * 0.5;
			aabb.pos -= ofs;
			Transform xform;
			xform.basis = Matrix3().rotated(Vector3(0, 1, 0), Math_PI * 0.25);
			xform.basis = Matrix3().rotated(Vector3(1, 0, 0), -Math_PI * 0.25) * xform.basis;
			AABB rot_aabb = xform.xform(aabb);
			print_line("rot_aabb: " + rot_aabb);
			float m = MAX(rot_aabb.size.x, rot_aabb.size.y) * 0.5;
			if (m == 0)
				continue;
			m = 1.0 / m;
			m *= 0.5;
			print_line("scale: " + rtos(m));
			xform.basis.scale(Vector3(m, m, m));
			xform.origin = -xform.basis.xform(ofs); //-ofs*m;
			xform.origin.z -= rot_aabb.size.z * 2;
			RID inst = VS::get_singleton()->instance_create2(mesh->get_rid(), scen);
			VS::get_singleton()->instance_set_transform(inst, xform);
			ep.step(TTR("Thumbnail.."), i);
			VS::get_singleton()->viewport_queue_screen_capture(vp);
			Main::iteration();
			Image img = VS::get_singleton()->viewport_get_screen_capture(vp);
			ERR_CONTINUE(img.empty());
			Ref<ImageTexture> it(memnew(ImageTexture));
			it->create_from_image(img);
			p_library->set_item_preview(id, it);

			//					print_line("loaded image, size: "+rtos(m)+" dist: "+rtos(dist)+" empty?"+itos(img.empty())+" w: "+itos(it->get_width())+" h: "+itos(it->get_height()));
			VS::get_singleton()->free(inst);
		}

		VS::get_singleton()->free(lightinst);
		VS::get_singleton()->free(light);
		VS::get_singleton()->free(vp);
		VS::get_singleton()->free(cam);
		VS::get_singleton()->free(scen);
	}
}

void MeshLibraryEditor::_import_scene_cbk(const String &p_str) {

	print_line("Impot Callback!");

	Ref<PackedScene> ps = ResourceLoader::load(p_str, "PackedScene");
	ERR_FAIL_COND(ps.is_null());
	Node *scene = ps->instance();

	_import_scene(scene, theme, option == MENU_OPTION_UPDATE_FROM_SCENE);

	memdelete(scene);
	theme->set_meta("_editor_source_scene", p_str);
	menu->get_popup()->set_item_disabled(menu->get_popup()->get_item_index(MENU_OPTION_UPDATE_FROM_SCENE), false);
}

Error MeshLibraryEditor::update_library_file(Node *p_base_scene, Ref<MeshLibrary> ml, bool p_merge) {

	_import_scene(p_base_scene, ml, p_merge);
	return OK;
}

void MeshLibraryEditor::_menu_cbk(int p_option) {

	option = p_option;
	switch (p_option) {

		case MENU_OPTION_ADD_ITEM: {

			theme->create_item(theme->get_last_unused_item_id());
		} break;
		case MENU_OPTION_REMOVE_ITEM: {

			String p = editor->get_property_editor()->get_selected_path();
			if (p.begins_with("/MeshLibrary/item") && p.get_slice_count("/") >= 3) {

				to_erase = p.get_slice("/", 3).to_int();
				cd->set_text(vformat(TTR("Remove item %d?"), to_erase));
				cd->popup_centered(Size2(300, 60));
			}
		} break;
		case MENU_OPTION_IMPORT_FROM_SCENE: {

			file->popup_centered_ratio();
		} break;
		case MENU_OPTION_UPDATE_FROM_SCENE: {

			cd->set_text("Update from existing scene?:\n" + String(theme->get_meta("_editor_source_scene")));
			cd->popup_centered(Size2(500, 60));
		} break;
	}
}

void MeshLibraryEditor::_bind_methods() {

	ObjectTypeDB::bind_method("_menu_cbk", &MeshLibraryEditor::_menu_cbk);
	ObjectTypeDB::bind_method("_menu_confirm", &MeshLibraryEditor::_menu_confirm);
	ObjectTypeDB::bind_method("_import_scene_cbk", &MeshLibraryEditor::_import_scene_cbk);
}

MeshLibraryEditor::MeshLibraryEditor(EditorNode *p_editor) {

	file = memnew(EditorFileDialog);
	file->set_mode(EditorFileDialog::MODE_OPEN_FILE);
	//not for now?
	List<String> extensions;
	ResourceLoader::get_recognized_extensions_for_type("PackedScene", &extensions);
	file->clear_filters();
	file->set_title(TTR("Import Scene"));
	for (int i = 0; i < extensions.size(); i++) {

		file->add_filter("*." + extensions[i] + " ; " + extensions[i].to_upper());
	}
	add_child(file);
	file->connect("file_selected", this, "_import_scene_cbk");

	Panel *panel = memnew(Panel);
	panel->set_area_as_parent_rect();
	add_child(panel);
	MenuButton *options = memnew(MenuButton);
	panel->add_child(options);
	options->set_pos(Point2(1, 1));
	options->set_text("Theme");
	options->get_popup()->add_item(TTR("Add Item"), MENU_OPTION_ADD_ITEM);
	options->get_popup()->add_item(TTR("Remove Selected Item"), MENU_OPTION_REMOVE_ITEM);
	options->get_popup()->add_separator();
	options->get_popup()->add_item(TTR("Import from Scene"), MENU_OPTION_IMPORT_FROM_SCENE);
	options->get_popup()->add_item(TTR("Update from Scene"), MENU_OPTION_UPDATE_FROM_SCENE);
	options->get_popup()->set_item_disabled(options->get_popup()->get_item_index(MENU_OPTION_UPDATE_FROM_SCENE), true);
	options->get_popup()->connect("item_pressed", this, "_menu_cbk");
	menu = options;
	editor = p_editor;
	cd = memnew(ConfirmationDialog);
	add_child(cd);
	cd->get_ok()->connect("pressed", this, "_menu_confirm");
}

void MeshLibraryEditorPlugin::edit(Object *p_node) {

	if (p_node && p_node->cast_to<MeshLibrary>()) {
		theme_editor->edit(p_node->cast_to<MeshLibrary>());
		theme_editor->show();
	} else
		theme_editor->hide();
}

bool MeshLibraryEditorPlugin::handles(Object *p_node) const {

	return p_node->is_type("MeshLibrary");
}

void MeshLibraryEditorPlugin::make_visible(bool p_visible) {

	if (p_visible)
		theme_editor->show();
	else
		theme_editor->hide();
}

MeshLibraryEditorPlugin::MeshLibraryEditorPlugin(EditorNode *p_node) {

	EDITOR_DEF("grid_map/preview_size", 64);
	theme_editor = memnew(MeshLibraryEditor(p_node));

	p_node->get_viewport()->add_child(theme_editor);
	theme_editor->set_area_as_parent_rect();
	theme_editor->set_anchor(MARGIN_RIGHT, Control::ANCHOR_END);
	theme_editor->set_anchor(MARGIN_BOTTOM, Control::ANCHOR_BEGIN);
	theme_editor->set_end(Point2(0, 22));
	theme_editor->hide();
}