/*************************************************************************/
/*  connections_dialog.h                                                 */
/*************************************************************************/
/*                       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).   */
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/* 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    */
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/*************************************************************************/

/**
@author Juan Linietsky <reduzio@gmail.com>
*/

#ifndef CONNECTIONS_DIALOG_H
#define CONNECTIONS_DIALOG_H

#include "core/undo_redo.h"
#include "editor/editor_inspector.h"
#include "editor/scene_tree_editor.h"
#include "scene/gui/button.h"
#include "scene/gui/check_button.h"
#include "scene/gui/dialogs.h"
#include "scene/gui/line_edit.h"
#include "scene/gui/menu_button.h"
#include "scene/gui/popup.h"
#include "scene/gui/tree.h"

class PopupMenu;
class ConnectDialogBinds;

class ConnectDialog : public ConfirmationDialog {

	GDCLASS(ConnectDialog, ConfirmationDialog);

public:
	struct ConnectionData {
		Node *source = nullptr;
		Node *target = nullptr;
		StringName signal;
		StringName method;
		uint32_t flags = 0;
		Vector<Variant> binds;

		ConnectionData() {
		}
		ConnectionData(const Connection &p_connection) {
			source = Object::cast_to<Node>(p_connection.signal.get_object());
			signal = p_connection.signal.get_name();
			target = Object::cast_to<Node>(p_connection.callable.get_object());
			method = p_connection.callable.get_method();
			flags = p_connection.flags;
			binds = p_connection.binds;
		}
		operator Connection() {
			Connection c;
			c.signal = ::Signal(source, signal);
			c.callable = Callable(target, method);
			c.flags = flags;
			c.binds = binds;
			return c;
		}
	};

private:
	Label *connect_to_label;
	LineEdit *from_signal;
	Node *source;
	StringName signal;
	LineEdit *dst_method;
	ConnectDialogBinds *cdbinds;
	bool bEditMode;
	NodePath dst_path;
	VBoxContainer *vbc_right;

	SceneTreeEditor *tree;
	AcceptDialog *error;
	EditorInspector *bind_editor;
	OptionButton *type_list;
	CheckBox *deferred;
	CheckBox *oneshot;
	CheckButton *advanced;

	Label *error_label;

	void ok_pressed();
	void _cancel_pressed();
	void _item_activated();
	void _text_entered(const String &_text);
	void _tree_node_selected();
	void _add_bind();
	void _remove_bind();
	void _advanced_pressed();
	void _update_ok_enabled();

protected:
	void _notification(int p_what);
	static void _bind_methods();

public:
	Node *get_source() const;
	StringName get_signal_name() const;
	NodePath get_dst_path() const;
	void set_dst_node(Node *p_node);
	StringName get_dst_method_name() const;
	void set_dst_method(const StringName &p_method);
	Vector<Variant> get_binds() const;

	bool get_deferred() const;
	bool get_oneshot() const;
	bool is_editing() const;

	void init(ConnectionData c, bool bEdit = false);

	void popup_dialog(const String &p_for_signal);
	ConnectDialog();
	~ConnectDialog();
};

//////////////////////////////////////////

// Custom Tree needed to use a RichTextLabel as tooltip control
// when display signal documentation.
class ConnectionsDockTree : public Tree {

	virtual Control *make_custom_tooltip(const String &p_text) const;
};

class ConnectionsDock : public VBoxContainer {

	GDCLASS(ConnectionsDock, VBoxContainer);

	//Right-click Pop-up Menu Options.
	enum SignalMenuOption {
		CONNECT,
		DISCONNECT_ALL
	};

	enum SlotMenuOption {
		EDIT,
		GO_TO_SCRIPT,
		DISCONNECT
	};

	Node *selectedNode;
	ConnectionsDockTree *tree;
	EditorNode *editor;

	ConfirmationDialog *disconnect_all_dialog;
	ConnectDialog *connect_dialog;
	Button *connect_button;
	PopupMenu *signal_menu;
	PopupMenu *slot_menu;
	UndoRedo *undo_redo;

	Map<StringName, Map<StringName, String>> descr_cache;

	void _make_or_edit_connection();
	void _connect(ConnectDialog::ConnectionData cToMake);
	void _disconnect(TreeItem &item);
	void _disconnect_all();

	void _tree_item_selected();
	void _tree_item_activated();
	bool _is_item_signal(TreeItem &item);

	void _open_connection_dialog(TreeItem &item);
	void _open_connection_dialog(ConnectDialog::ConnectionData cToEdit);
	void _go_to_script(TreeItem &item);

	void _handle_signal_menu_option(int option);
	void _handle_slot_menu_option(int option);
	void _rmb_pressed(Vector2 position);
	void _close();

protected:
	void _connect_pressed();
	void _notification(int p_what);
	static void _bind_methods();

public:
	void set_undoredo(UndoRedo *p_undo_redo) { undo_redo = p_undo_redo; }
	void set_node(Node *p_node);
	void update_tree();

	ConnectionsDock(EditorNode *p_editor = NULL);
	~ConnectionsDock();
};

#endif