/*************************************************************************/
/*  settings_config_dialog.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 */
/* 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:                                             */
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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,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/*************************************************************************/

#include "settings_config_dialog.h"

#include "core/os/keyboard.h"
#include "core/project_settings.h"
#include "editor/debugger/editor_debugger_node.h"
#include "editor_file_system.h"
#include "editor_log.h"
#include "editor_node.h"
#include "editor_scale.h"
#include "editor_settings.h"
#include "scene/gui/margin_container.h"

void EditorSettingsDialog::ok_pressed() {

	if (!EditorSettings::get_singleton())
		return;

	_settings_save();
	timer->stop();
}

void EditorSettingsDialog::_settings_changed() {

	timer->start();
}

void EditorSettingsDialog::_settings_property_edited(const String &p_name) {

	String full_name = inspector->get_full_item_path(p_name);

	if (full_name == "interface/theme/accent_color" || full_name == "interface/theme/base_color" || full_name == "interface/theme/contrast") {
		EditorSettings::get_singleton()->set_manually("interface/theme/preset", "Custom"); // set preset to Custom
	} else if (full_name.begins_with("text_editor/highlighting")) {
		EditorSettings::get_singleton()->set_manually("text_editor/theme/color_theme", "Custom");
	}
}

void EditorSettingsDialog::_settings_save() {

	EditorSettings::get_singleton()->notify_changes();
	EditorSettings::get_singleton()->save();
}

void EditorSettingsDialog::cancel_pressed() {

	if (!EditorSettings::get_singleton())
		return;

	EditorSettings::get_singleton()->notify_changes();
}

void EditorSettingsDialog::popup_edit_settings() {

	if (!EditorSettings::get_singleton())
		return;

	EditorSettings::get_singleton()->list_text_editor_themes(); // make sure we have an up to date list of themes

	inspector->edit(EditorSettings::get_singleton());
	inspector->get_inspector()->update_tree();

	search_box->select_all();
	search_box->grab_focus();

	_update_shortcuts();
	set_process_unhandled_input(true);

	// Restore valid window bounds or pop up at default size.
	Rect2 saved_size = EditorSettings::get_singleton()->get_project_metadata("dialog_bounds", "editor_settings", Rect2());
	if (saved_size != Rect2()) {
		popup(saved_size);
	} else {
		popup_centered_clamped(Size2(900, 700) * EDSCALE, 0.8);
	}

	_focus_current_search_box();
}

void EditorSettingsDialog::_filter_shortcuts(const String &p_filter) {
	shortcut_filter = p_filter;
	_update_shortcuts();
}

void EditorSettingsDialog::_undo_redo_callback(void *p_self, const String &p_name) {
	EditorNode::get_log()->add_message(p_name, EditorLog::MSG_TYPE_EDITOR);
}

void EditorSettingsDialog::_notification(int p_what) {

	switch (p_what) {
		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (!is_visible()) {
				EditorSettings::get_singleton()->set_project_metadata("dialog_bounds", "editor_settings", Rect2(get_position(), get_size()));
				set_process_unhandled_input(false);
			}
		} break;
		case NOTIFICATION_READY: {
			undo_redo->set_method_notify_callback(EditorDebuggerNode::_method_changeds, NULL);
			undo_redo->set_property_notify_callback(EditorDebuggerNode::_property_changeds, NULL);
			undo_redo->set_commit_notify_callback(_undo_redo_callback, this);
		} break;
		case NOTIFICATION_ENTER_TREE: {
			_update_icons();
		} break;
		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			_update_icons();
			// Update theme colors.
			inspector->update_category_list();
			_update_shortcuts();
		} break;
	}
}

void EditorSettingsDialog::_unhandled_input(const Ref<InputEvent> &p_event) {

	const Ref<InputEventKey> k = p_event;

	if (k.is_valid() && k->is_pressed()) {

		bool handled = false;

		if (ED_IS_SHORTCUT("editor/undo", p_event)) {
			String action = undo_redo->get_current_action_name();
			if (action != "")
				EditorNode::get_log()->add_message("Undo: " + action, EditorLog::MSG_TYPE_EDITOR);
			undo_redo->undo();
			handled = true;
		}

		if (ED_IS_SHORTCUT("editor/redo", p_event)) {
			undo_redo->redo();
			String action = undo_redo->get_current_action_name();
			if (action != "")
				EditorNode::get_log()->add_message("Redo: " + action, EditorLog::MSG_TYPE_EDITOR);
			handled = true;
		}

		if (k->get_keycode_with_modifiers() == (KEY_MASK_CMD | KEY_F)) {
			_focus_current_search_box();
			handled = true;
		}

		if (handled) {
			set_input_as_handled();
		}
	}
}

void EditorSettingsDialog::_update_icons() {

	search_box->set_right_icon(shortcuts->get_theme_icon("Search", "EditorIcons"));
	search_box->set_clear_button_enabled(true);
	shortcut_search_box->set_right_icon(shortcuts->get_theme_icon("Search", "EditorIcons"));
	shortcut_search_box->set_clear_button_enabled(true);

	restart_close_button->set_icon(shortcuts->get_theme_icon("Close", "EditorIcons"));
	restart_container->add_theme_style_override("panel", shortcuts->get_theme_stylebox("bg", "Tree"));
	restart_icon->set_texture(shortcuts->get_theme_icon("StatusWarning", "EditorIcons"));
	restart_label->add_theme_color_override("font_color", shortcuts->get_theme_color("warning_color", "Editor"));
}

void EditorSettingsDialog::_update_shortcuts() {

	Map<String, bool> collapsed;

	if (shortcuts->get_root() && shortcuts->get_root()->get_children()) {
		for (TreeItem *item = shortcuts->get_root()->get_children(); item; item = item->get_next()) {
			collapsed[item->get_text(0)] = item->is_collapsed();
		}
	}

	shortcuts->clear();

	List<String> slist;
	EditorSettings::get_singleton()->get_shortcut_list(&slist);
	TreeItem *root = shortcuts->create_item();

	Map<String, TreeItem *> sections;

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

		Ref<ShortCut> sc = EditorSettings::get_singleton()->get_shortcut(E->get());
		if (!sc->has_meta("original"))
			continue;

		Ref<InputEvent> original = sc->get_meta("original");

		String section_name = E->get().get_slice("/", 0);

		TreeItem *section;

		if (sections.has(section_name)) {
			section = sections[section_name];
		} else {
			section = shortcuts->create_item(root);

			String item_name = section_name.capitalize();
			section->set_text(0, item_name);

			if (collapsed.has(item_name)) {
				section->set_collapsed(collapsed[item_name]);
			}

			sections[section_name] = section;
			section->set_custom_bg_color(0, shortcuts->get_theme_color("prop_subsection", "Editor"));
			section->set_custom_bg_color(1, shortcuts->get_theme_color("prop_subsection", "Editor"));
		}

		// Don't match unassigned shortcuts when searching for assigned keys in search results.
		// This prevents all unassigned shortcuts from appearing when searching a string like "no".
		if (shortcut_filter.is_subsequence_ofi(sc->get_name()) || (sc->get_as_text() != "None" && shortcut_filter.is_subsequence_ofi(sc->get_as_text()))) {
			TreeItem *item = shortcuts->create_item(section);

			item->set_text(0, sc->get_name());
			item->set_text(1, sc->get_as_text());

			if (!sc->is_shortcut(original) && !(sc->get_shortcut().is_null() && original.is_null())) {
				item->add_button(1, shortcuts->get_theme_icon("Reload", "EditorIcons"), 2);
			}

			if (sc->get_as_text() == "None") {
				// Fade out unassigned shortcut labels for easier visual grepping.
				item->set_custom_color(1, shortcuts->get_theme_color("font_color", "Label") * Color(1, 1, 1, 0.5));
			}

			item->add_button(1, shortcuts->get_theme_icon("Edit", "EditorIcons"), 0);
			item->add_button(1, shortcuts->get_theme_icon("Close", "EditorIcons"), 1);
			item->set_tooltip(0, E->get());
			item->set_metadata(0, E->get());
		}
	}

	// remove sections with no shortcuts
	for (Map<String, TreeItem *>::Element *E = sections.front(); E; E = E->next()) {
		TreeItem *section = E->get();
		if (section->get_children() == NULL) {
			root->remove_child(section);
		}
	}
}

void EditorSettingsDialog::_shortcut_button_pressed(Object *p_item, int p_column, int p_idx) {

	TreeItem *ti = Object::cast_to<TreeItem>(p_item);
	ERR_FAIL_COND(!ti);

	String item = ti->get_metadata(0);
	Ref<ShortCut> sc = EditorSettings::get_singleton()->get_shortcut(item);

	if (p_idx == 0) {
		press_a_key_label->set_text(TTR("Press a Key..."));
		last_wait_for_key = Ref<InputEventKey>();
		press_a_key->popup_centered(Size2(250, 80) * EDSCALE);
		//press_a_key->grab_focus();
		press_a_key->get_ok()->set_focus_mode(Control::FOCUS_NONE);
		press_a_key->get_cancel()->set_focus_mode(Control::FOCUS_NONE);
		shortcut_configured = item;

	} else if (p_idx == 1) { //erase
		if (!sc.is_valid())
			return; //pointless, there is nothing

		undo_redo->create_action(TTR("Erase Shortcut"));
		undo_redo->add_do_method(sc.ptr(), "set_shortcut", Ref<InputEvent>());
		undo_redo->add_undo_method(sc.ptr(), "set_shortcut", sc->get_shortcut());
		undo_redo->add_do_method(this, "_update_shortcuts");
		undo_redo->add_undo_method(this, "_update_shortcuts");
		undo_redo->add_do_method(this, "_settings_changed");
		undo_redo->add_undo_method(this, "_settings_changed");
		undo_redo->commit_action();
	} else if (p_idx == 2) { //revert to original
		if (!sc.is_valid())
			return; //pointless, there is nothing

		Ref<InputEvent> original = sc->get_meta("original");

		undo_redo->create_action(TTR("Restore Shortcut"));
		undo_redo->add_do_method(sc.ptr(), "set_shortcut", original);
		undo_redo->add_undo_method(sc.ptr(), "set_shortcut", sc->get_shortcut());
		undo_redo->add_do_method(this, "_update_shortcuts");
		undo_redo->add_undo_method(this, "_update_shortcuts");
		undo_redo->add_do_method(this, "_settings_changed");
		undo_redo->add_undo_method(this, "_settings_changed");
		undo_redo->commit_action();
	}
}

void EditorSettingsDialog::_wait_for_key(const Ref<InputEvent> &p_event) {

	Ref<InputEventKey> k = p_event;

	if (k.is_valid() && k->is_pressed() && k->get_keycode() != 0) {

		last_wait_for_key = k;
		const String str = keycode_get_string(k->get_keycode_with_modifiers());

		press_a_key_label->set_text(str);
		press_a_key->set_input_as_handled();
	}
}

void EditorSettingsDialog::_press_a_key_confirm() {

	if (last_wait_for_key.is_null())
		return;

	Ref<InputEventKey> ie;
	ie.instance();
	ie->set_keycode(last_wait_for_key->get_keycode());
	ie->set_shift(last_wait_for_key->get_shift());
	ie->set_control(last_wait_for_key->get_control());
	ie->set_alt(last_wait_for_key->get_alt());
	ie->set_metakey(last_wait_for_key->get_metakey());

	Ref<ShortCut> sc = EditorSettings::get_singleton()->get_shortcut(shortcut_configured);

	undo_redo->create_action(TTR("Change Shortcut") + " '" + shortcut_configured + "'");
	undo_redo->add_do_method(sc.ptr(), "set_shortcut", ie);
	undo_redo->add_undo_method(sc.ptr(), "set_shortcut", sc->get_shortcut());
	undo_redo->add_do_method(this, "_update_shortcuts");
	undo_redo->add_undo_method(this, "_update_shortcuts");
	undo_redo->add_do_method(this, "_settings_changed");
	undo_redo->add_undo_method(this, "_settings_changed");
	undo_redo->commit_action();
}

void EditorSettingsDialog::_tabs_tab_changed(int p_tab) {

	_focus_current_search_box();
}

void EditorSettingsDialog::_focus_current_search_box() {

	Control *tab = tabs->get_current_tab_control();
	LineEdit *current_search_box = NULL;
	if (tab == tab_general)
		current_search_box = search_box;
	else if (tab == tab_shortcuts)
		current_search_box = shortcut_search_box;

	if (current_search_box) {
		current_search_box->grab_focus();
		current_search_box->select_all();
	}
}

void EditorSettingsDialog::_editor_restart() {
	EditorNode::get_singleton()->save_all_scenes();
	EditorNode::get_singleton()->restart_editor();
}

void EditorSettingsDialog::_editor_restart_request() {
	restart_container->show();
}

void EditorSettingsDialog::_editor_restart_close() {
	restart_container->hide();
}

void EditorSettingsDialog::_bind_methods() {

	ClassDB::bind_method(D_METHOD("_unhandled_input"), &EditorSettingsDialog::_unhandled_input);
	ClassDB::bind_method(D_METHOD("_update_shortcuts"), &EditorSettingsDialog::_update_shortcuts);
}

EditorSettingsDialog::EditorSettingsDialog() {

	set_title(TTR("Editor Settings"));

	undo_redo = memnew(UndoRedo);

	tabs = memnew(TabContainer);
	tabs->set_tab_align(TabContainer::ALIGN_LEFT);
	tabs->connect("tab_changed", callable_mp(this, &EditorSettingsDialog::_tabs_tab_changed));
	add_child(tabs);

	// General Tab

	tab_general = memnew(VBoxContainer);
	tabs->add_child(tab_general);
	tab_general->set_name(TTR("General"));

	HBoxContainer *hbc = memnew(HBoxContainer);
	hbc->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	tab_general->add_child(hbc);

	search_box = memnew(LineEdit);
	search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	hbc->add_child(search_box);

	inspector = memnew(SectionedInspector);
	inspector->get_inspector()->set_use_filter(true);
	inspector->register_search_box(search_box);
	inspector->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	inspector->get_inspector()->set_undo_redo(undo_redo);
	tab_general->add_child(inspector);
	inspector->get_inspector()->connect("property_edited", callable_mp(this, &EditorSettingsDialog::_settings_property_edited));
	inspector->get_inspector()->connect("restart_requested", callable_mp(this, &EditorSettingsDialog::_editor_restart_request));

	restart_container = memnew(PanelContainer);
	tab_general->add_child(restart_container);
	HBoxContainer *restart_hb = memnew(HBoxContainer);
	restart_container->add_child(restart_hb);
	restart_icon = memnew(TextureRect);
	restart_icon->set_v_size_flags(Control::SIZE_SHRINK_CENTER);
	restart_hb->add_child(restart_icon);
	restart_label = memnew(Label);
	restart_label->set_text(TTR("The editor must be restarted for changes to take effect."));
	restart_hb->add_child(restart_label);
	restart_hb->add_spacer();
	Button *restart_button = memnew(Button);
	restart_button->connect("pressed", callable_mp(this, &EditorSettingsDialog::_editor_restart));
	restart_hb->add_child(restart_button);
	restart_button->set_text(TTR("Save & Restart"));
	restart_close_button = memnew(ToolButton);
	restart_close_button->connect("pressed", callable_mp(this, &EditorSettingsDialog::_editor_restart_close));
	restart_hb->add_child(restart_close_button);
	restart_container->hide();

	// Shortcuts Tab

	tab_shortcuts = memnew(VBoxContainer);
	tabs->add_child(tab_shortcuts);
	tab_shortcuts->set_name(TTR("Shortcuts"));

	hbc = memnew(HBoxContainer);
	hbc->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	tab_shortcuts->add_child(hbc);

	shortcut_search_box = memnew(LineEdit);
	shortcut_search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	hbc->add_child(shortcut_search_box);
	shortcut_search_box->connect("text_changed", callable_mp(this, &EditorSettingsDialog::_filter_shortcuts));

	shortcuts = memnew(Tree);
	tab_shortcuts->add_child(shortcuts, true);
	shortcuts->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	shortcuts->set_columns(2);
	shortcuts->set_hide_root(true);
	shortcuts->set_column_titles_visible(true);
	shortcuts->set_column_title(0, TTR("Name"));
	shortcuts->set_column_title(1, TTR("Binding"));
	shortcuts->connect("button_pressed", callable_mp(this, &EditorSettingsDialog::_shortcut_button_pressed));

	press_a_key = memnew(ConfirmationDialog);
	//press_a_key->set_focus_mode(Control::FOCUS_ALL);
	add_child(press_a_key);

	Label *l = memnew(Label);
	l->set_text(TTR("Press a Key..."));
	l->set_anchors_and_margins_preset(Control::PRESET_WIDE);
	l->set_align(Label::ALIGN_CENTER);
	l->set_margin(MARGIN_TOP, 20);
	l->set_anchor_and_margin(MARGIN_BOTTOM, Control::ANCHOR_BEGIN, 30);
	press_a_key_label = l;
	press_a_key->add_child(l);
	press_a_key->connect("window_input", callable_mp(this, &EditorSettingsDialog::_wait_for_key));
	press_a_key->connect("confirmed", callable_mp(this, &EditorSettingsDialog::_press_a_key_confirm));

	set_hide_on_ok(true);

	timer = memnew(Timer);
	timer->set_wait_time(1.5);
	timer->connect("timeout", callable_mp(this, &EditorSettingsDialog::_settings_save));
	timer->set_one_shot(true);
	add_child(timer);
	EditorSettings::get_singleton()->connect("settings_changed", callable_mp(this, &EditorSettingsDialog::_settings_changed));
	get_ok()->set_text(TTR("Close"));

	updating = false;
}

EditorSettingsDialog::~EditorSettingsDialog() {
	memdelete(undo_redo);
}