/*************************************************************************/
/*  editor_sectioned_inspector.cpp                                       */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
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/* "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:                                             */
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/* 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,       */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
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/*************************************************************************/

#include "editor_sectioned_inspector.h"
#include "editor_scale.h"
class SectionedInspectorFilter : public Object {

	GDCLASS(SectionedInspectorFilter, Object);

	Object *edited;
	String section;
	bool allow_sub;

	bool _set(const StringName &p_name, const Variant &p_value) {

		if (!edited)
			return false;

		String name = p_name;
		if (section != "") {
			name = section + "/" + name;
		}

		bool valid;
		edited->set(name, p_value, &valid);
		return valid;
	}

	bool _get(const StringName &p_name, Variant &r_ret) const {

		if (!edited)
			return false;

		String name = p_name;
		if (section != "") {
			name = section + "/" + name;
		}

		bool valid = false;

		r_ret = edited->get(name, &valid);
		return valid;
	}
	void _get_property_list(List<PropertyInfo> *p_list) const {

		if (!edited)
			return;

		List<PropertyInfo> pinfo;
		edited->get_property_list(&pinfo);
		for (List<PropertyInfo>::Element *E = pinfo.front(); E; E = E->next()) {

			PropertyInfo pi = E->get();
			int sp = pi.name.find("/");

			if (pi.name == "resource_path" || pi.name == "resource_name" || pi.name == "resource_local_to_scene" || pi.name.begins_with("script/") || pi.name.begins_with("_global_script")) //skip resource stuff
				continue;

			if (sp == -1) {
				pi.name = "global/" + pi.name;
			}

			if (pi.name.begins_with(section + "/")) {
				pi.name = pi.name.replace_first(section + "/", "");
				if (!allow_sub && pi.name.find("/") != -1)
					continue;
				p_list->push_back(pi);
			}
		}
	}

	bool property_can_revert(const String &p_name) {

		return edited->call("property_can_revert", section + "/" + p_name);
	}

	Variant property_get_revert(const String &p_name) {

		return edited->call("property_get_revert", section + "/" + p_name);
	}

protected:
	static void _bind_methods() {

		ClassDB::bind_method("property_can_revert", &SectionedInspectorFilter::property_can_revert);
		ClassDB::bind_method("property_get_revert", &SectionedInspectorFilter::property_get_revert);
	}

public:
	void set_section(const String &p_section, bool p_allow_sub) {

		section = p_section;
		allow_sub = p_allow_sub;
		_change_notify();
	}

	void set_edited(Object *p_edited) {
		edited = p_edited;
		_change_notify();
	}

	SectionedInspectorFilter() {
		edited = NULL;
	}
};

void SectionedInspector::_bind_methods() {

	ClassDB::bind_method("_section_selected", &SectionedInspector::_section_selected);
	ClassDB::bind_method("_search_changed", &SectionedInspector::_search_changed);

	ClassDB::bind_method("update_category_list", &SectionedInspector::update_category_list);
}

void SectionedInspector::_section_selected() {

	if (!sections->get_selected())
		return;

	selected_category = sections->get_selected()->get_metadata(0);
	filter->set_section(selected_category, sections->get_selected()->get_children() == NULL);
	inspector->set_property_prefix(selected_category + "/");
}

void SectionedInspector::set_current_section(const String &p_section) {

	if (section_map.has(p_section)) {
		section_map[p_section]->select(0);
	}
}

String SectionedInspector::get_current_section() const {

	if (sections->get_selected())
		return sections->get_selected()->get_metadata(0);
	else
		return "";
}

String SectionedInspector::get_full_item_path(const String &p_item) {

	String base = get_current_section();

	if (base != "")
		return base + "/" + p_item;
	else
		return p_item;
}

void SectionedInspector::edit(Object *p_object) {

	if (!p_object) {
		obj = 0;
		sections->clear();

		filter->set_edited(NULL);
		inspector->edit(NULL);

		return;
	}

	ObjectID id = p_object->get_instance_id();

	inspector->set_object_class(p_object->get_class());

	if (obj != id) {

		obj = id;
		update_category_list();

		filter->set_edited(p_object);
		inspector->edit(filter);

		TreeItem *first_item = sections->get_root();
		if (first_item) {
			while (first_item->get_children())
				first_item = first_item->get_children();

			first_item->select(0);
			selected_category = first_item->get_metadata(0);
		}
	} else {

		update_category_list();
	}
}

void SectionedInspector::update_category_list() {

	sections->clear();

	Object *o = ObjectDB::get_instance(obj);

	if (!o)
		return;

	List<PropertyInfo> pinfo;
	o->get_property_list(&pinfo);

	section_map.clear();

	TreeItem *root = sections->create_item();
	section_map[""] = root;

	String filter;
	if (search_box)
		filter = search_box->get_text();

	for (List<PropertyInfo>::Element *E = pinfo.front(); E; E = E->next()) {

		PropertyInfo pi = E->get();

		if (pi.usage & PROPERTY_USAGE_CATEGORY)
			continue;
		else if (!(pi.usage & PROPERTY_USAGE_EDITOR))
			continue;

		if (pi.name.find(":") != -1 || pi.name == "script" || pi.name == "resource_name" || pi.name == "resource_path" || pi.name == "resource_local_to_scene" || pi.name.begins_with("_global_script"))
			continue;

		if (!filter.empty() && !filter.is_subsequence_ofi(pi.name) && !filter.is_subsequence_ofi(pi.name.replace("/", " ").capitalize()))
			continue;

		int sp = pi.name.find("/");
		if (sp == -1)
			pi.name = "global/" + pi.name;

		Vector<String> sectionarr = pi.name.split("/");
		String metasection;

		int sc = MIN(2, sectionarr.size() - 1);

		for (int i = 0; i < sc; i++) {

			TreeItem *parent = section_map[metasection];
			parent->set_custom_bg_color(0, get_color("prop_subsection", "Editor"));

			if (i > 0) {
				metasection += "/" + sectionarr[i];
			} else {
				metasection = sectionarr[i];
			}

			if (!section_map.has(metasection)) {
				TreeItem *ms = sections->create_item(parent);
				section_map[metasection] = ms;
				ms->set_text(0, sectionarr[i].capitalize());
				ms->set_metadata(0, metasection);
				ms->set_selectable(0, false);
			}

			if (i == sc - 1) {
				//if it has children, make selectable
				section_map[metasection]->set_selectable(0, true);
			}
		}
	}

	if (section_map.has(selected_category)) {
		section_map[selected_category]->select(0);
	}

	inspector->update_tree();
}

void SectionedInspector::register_search_box(LineEdit *p_box) {

	search_box = p_box;
	inspector->register_text_enter(p_box);
	search_box->connect("text_changed", this, "_search_changed");
}

void SectionedInspector::_search_changed(const String &p_what) {

	update_category_list();
}

EditorInspector *SectionedInspector::get_inspector() {

	return inspector;
}

SectionedInspector::SectionedInspector() :
		obj(0),
		sections(memnew(Tree)),
		filter(memnew(SectionedInspectorFilter)),
		inspector(memnew(EditorInspector)),
		search_box(NULL) {
	add_constant_override("autohide", 1); // Fixes the dragger always showing up

	VBoxContainer *left_vb = memnew(VBoxContainer);
	left_vb->set_custom_minimum_size(Size2(190, 0) * EDSCALE);
	add_child(left_vb);

	sections->set_v_size_flags(SIZE_EXPAND_FILL);
	sections->set_hide_root(true);

	left_vb->add_child(sections, true);

	VBoxContainer *right_vb = memnew(VBoxContainer);
	right_vb->set_custom_minimum_size(Size2(300, 0) * EDSCALE);
	right_vb->set_h_size_flags(SIZE_EXPAND_FILL);
	add_child(right_vb);

	inspector->set_v_size_flags(SIZE_EXPAND_FILL);
	right_vb->add_child(inspector, true);
	inspector->set_use_doc_hints(true);

	sections->connect("cell_selected", this, "_section_selected");
}

SectionedInspector::~SectionedInspector() {

	memdelete(filter);
}
