/*************************************************************************/
/*  dialogs.cpp                                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/* a copy of this software and associated documentation files (the       */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/*************************************************************************/

#include "dialogs.h"

#include "core/os/keyboard.h"
#include "core/string/print_string.h"
#include "core/string/translation.h"
#include "scene/gui/line_edit.h"

// AcceptDialog

void AcceptDialog::_input_from_window(const Ref<InputEvent> &p_event) {
	Ref<InputEventKey> key = p_event;
	if (close_on_escape && key.is_valid() && key->is_pressed() && key->get_keycode() == Key::ESCAPE) {
		_cancel_pressed();
	}
}

void AcceptDialog::_parent_focused() {
	if (close_on_escape && !is_exclusive()) {
		_cancel_pressed();
	}
}

void AcceptDialog::_update_theme_item_cache() {
	Window::_update_theme_item_cache();

	theme_cache.panel_style = get_theme_stylebox(SNAME("panel"));
	theme_cache.buttons_separation = get_theme_constant(SNAME("buttons_separation"));
}

void AcceptDialog::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_POST_ENTER_TREE: {
			if (is_visible()) {
				get_ok_button()->grab_focus();
			}
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (is_visible()) {
				if (get_ok_button()->is_inside_tree()) {
					get_ok_button()->grab_focus();
				}
				_update_child_rects();

				parent_visible = get_parent_visible_window();
				if (parent_visible) {
					parent_visible->connect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
				}
			} else {
				if (parent_visible) {
					parent_visible->disconnect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
					parent_visible = nullptr;
				}
			}
		} break;

		case NOTIFICATION_THEME_CHANGED: {
			bg_panel->add_theme_style_override("panel", theme_cache.panel_style);

			child_controls_changed();
			if (is_visible()) {
				_update_child_rects();
			}
		} break;

		case NOTIFICATION_EXIT_TREE: {
			if (parent_visible) {
				parent_visible->disconnect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
				parent_visible = nullptr;
			}
		} break;

		case NOTIFICATION_READY:
		case NOTIFICATION_WM_SIZE_CHANGED: {
			if (is_visible()) {
				_update_child_rects();
			}
		} break;

		case NOTIFICATION_WM_CLOSE_REQUEST: {
			_cancel_pressed();
		} break;
	}
}

void AcceptDialog::_text_submitted(const String &p_text) {
	if (get_ok_button() && get_ok_button()->is_disabled()) {
		return; // Do not allow submission if OK button is disabled.
	}
	_ok_pressed();
}

void AcceptDialog::_ok_pressed() {
	if (hide_on_ok) {
		set_visible(false);
	}
	ok_pressed();
	emit_signal(SNAME("confirmed"));
}

void AcceptDialog::_cancel_pressed() {
	Window *parent_window = parent_visible;
	if (parent_visible) {
		parent_visible->disconnect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
		parent_visible = nullptr;
	}

	call_deferred(SNAME("hide"));

	emit_signal(SNAME("cancelled"));

	cancel_pressed();

	if (parent_window) {
		//parent_window->grab_focus();
	}
}

String AcceptDialog::get_text() const {
	return message_label->get_text();
}

void AcceptDialog::set_text(String p_text) {
	if (message_label->get_text() == p_text) {
		return;
	}

	message_label->set_text(p_text);

	child_controls_changed();
	if (is_visible()) {
		_update_child_rects();
	}
}

void AcceptDialog::set_hide_on_ok(bool p_hide) {
	hide_on_ok = p_hide;
}

bool AcceptDialog::get_hide_on_ok() const {
	return hide_on_ok;
}

void AcceptDialog::set_close_on_escape(bool p_hide) {
	close_on_escape = p_hide;
}

bool AcceptDialog::get_close_on_escape() const {
	return close_on_escape;
}

void AcceptDialog::set_autowrap(bool p_autowrap) {
	message_label->set_autowrap_mode(p_autowrap ? TextServer::AUTOWRAP_WORD : TextServer::AUTOWRAP_OFF);
}

bool AcceptDialog::has_autowrap() {
	return message_label->get_autowrap_mode() != TextServer::AUTOWRAP_OFF;
}

void AcceptDialog::set_ok_button_text(String p_ok_button_text) {
	ok_button->set_text(p_ok_button_text);

	child_controls_changed();
	if (is_visible()) {
		_update_child_rects();
	}
}

String AcceptDialog::get_ok_button_text() const {
	return ok_button->get_text();
}

void AcceptDialog::register_text_enter(Control *p_line_edit) {
	ERR_FAIL_NULL(p_line_edit);
	LineEdit *line_edit = Object::cast_to<LineEdit>(p_line_edit);
	if (line_edit) {
		line_edit->connect("text_submitted", callable_mp(this, &AcceptDialog::_text_submitted));
	}
}

void AcceptDialog::_update_child_rects() {
	Size2 size = get_size();
	float h_margins = theme_cache.panel_style->get_margin(SIDE_LEFT) + theme_cache.panel_style->get_margin(SIDE_RIGHT);
	float v_margins = theme_cache.panel_style->get_margin(SIDE_TOP) + theme_cache.panel_style->get_margin(SIDE_BOTTOM);

	// Fill the entire size of the window with the background.
	bg_panel->set_position(Point2());
	bg_panel->set_size(size);

	// Place the buttons from the bottom edge to their minimum required size.
	Size2 buttons_minsize = buttons_hbox->get_combined_minimum_size();
	Size2 buttons_size = Size2(size.x - h_margins, buttons_minsize.y);
	Point2 buttons_position = Point2(theme_cache.panel_style->get_margin(SIDE_LEFT), size.y - theme_cache.panel_style->get_margin(SIDE_BOTTOM) - buttons_size.y);
	buttons_hbox->set_position(buttons_position);
	buttons_hbox->set_size(buttons_size);

	// Place the content from the top to fill the rest of the space (minus the separation).
	Point2 content_position = Point2(theme_cache.panel_style->get_margin(SIDE_LEFT), theme_cache.panel_style->get_margin(SIDE_TOP));
	Size2 content_size = Size2(size.x - h_margins, size.y - v_margins - buttons_size.y - theme_cache.buttons_separation);

	for (int i = 0; i < get_child_count(); i++) {
		Control *c = Object::cast_to<Control>(get_child(i));
		if (!c) {
			continue;
		}
		if (c == buttons_hbox || c == bg_panel || c->is_set_as_top_level()) {
			continue;
		}

		c->set_position(content_position);
		c->set_size(content_size);
	}
}

Size2 AcceptDialog::_get_contents_minimum_size() const {
	// First, we then iterate over the label and any other custom controls
	// to try and find the size that encompasses all content.
	Size2 content_minsize;
	for (int i = 0; i < get_child_count(); i++) {
		Control *c = Object::cast_to<Control>(get_child(i));
		if (!c) {
			continue;
		}

		// Buttons will be included afterwards.
		// The panel only displays the stylebox and doesn't contribute to the size.
		if (c == buttons_hbox || c == bg_panel || c->is_set_as_top_level()) {
			continue;
		}

		Size2 child_minsize = c->get_combined_minimum_size();
		content_minsize.x = MAX(child_minsize.x, content_minsize.x);
		content_minsize.y = MAX(child_minsize.y, content_minsize.y);
	}

	// Then we take the background panel as it provides the offsets,
	// which are always added to the minimum size.
	if (theme_cache.panel_style.is_valid()) {
		content_minsize += theme_cache.panel_style->get_minimum_size();
	}

	// Then we add buttons. Horizontally we're interested in whichever
	// value is the biggest. Vertically buttons add to the overall size.
	Size2 buttons_minsize = buttons_hbox->get_combined_minimum_size();
	content_minsize.x = MAX(buttons_minsize.x, content_minsize.x);
	content_minsize.y += buttons_minsize.y;
	// Plus there is a separation size added on top.
	content_minsize.y += theme_cache.buttons_separation;

	// Last, we make sure that we aren't below the minimum window size.
	Size2 window_minsize = get_min_size();
	content_minsize.x = MAX(window_minsize.x, content_minsize.x);
	content_minsize.y = MAX(window_minsize.y, content_minsize.y);
	return content_minsize;
}

void AcceptDialog::_custom_action(const String &p_action) {
	emit_signal(SNAME("custom_action"), p_action);
	custom_action(p_action);
}

Button *AcceptDialog::add_button(const String &p_text, bool p_right, const String &p_action) {
	Button *button = memnew(Button);
	button->set_text(p_text);

	if (p_right) {
		buttons_hbox->add_child(button);
		buttons_hbox->add_spacer();
	} else {
		buttons_hbox->add_child(button);
		buttons_hbox->move_child(button, 0);
		buttons_hbox->add_spacer(true);
	}

	child_controls_changed();
	if (is_visible()) {
		_update_child_rects();
	}

	if (!p_action.is_empty()) {
		button->connect("pressed", callable_mp(this, &AcceptDialog::_custom_action).bind(p_action));
	}

	return button;
}

Button *AcceptDialog::add_cancel_button(const String &p_cancel) {
	String c = p_cancel;
	if (p_cancel.is_empty()) {
		c = "Cancel";
	}

	Button *b = swap_cancel_ok ? add_button(c, true) : add_button(c);

	b->connect("pressed", callable_mp(this, &AcceptDialog::_cancel_pressed));

	return b;
}

void AcceptDialog::remove_button(Control *p_button) {
	Button *button = Object::cast_to<Button>(p_button);
	ERR_FAIL_NULL(button);
	ERR_FAIL_COND_MSG(button->get_parent() != buttons_hbox, vformat("Cannot remove button %s as it does not belong to this dialog.", button->get_name()));
	ERR_FAIL_COND_MSG(button == ok_button, "Cannot remove dialog's OK button.");

	if (button->is_connected("pressed", callable_mp(this, &AcceptDialog::_custom_action))) {
		button->disconnect("pressed", callable_mp(this, &AcceptDialog::_custom_action));
	}
	if (button->is_connected("pressed", callable_mp(this, &AcceptDialog::_cancel_pressed))) {
		button->disconnect("pressed", callable_mp(this, &AcceptDialog::_cancel_pressed));
	}

	Node *right_spacer = buttons_hbox->get_child(button->get_index() + 1);
	// Should always be valid but let's avoid crashing.
	if (right_spacer) {
		buttons_hbox->remove_child(right_spacer);
		memdelete(right_spacer);
	}
	buttons_hbox->remove_child(button);

	child_controls_changed();
	if (is_visible()) {
		_update_child_rects();
	}
}

void AcceptDialog::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_ok_button"), &AcceptDialog::get_ok_button);
	ClassDB::bind_method(D_METHOD("get_label"), &AcceptDialog::get_label);
	ClassDB::bind_method(D_METHOD("set_hide_on_ok", "enabled"), &AcceptDialog::set_hide_on_ok);
	ClassDB::bind_method(D_METHOD("get_hide_on_ok"), &AcceptDialog::get_hide_on_ok);
	ClassDB::bind_method(D_METHOD("set_close_on_escape", "enabled"), &AcceptDialog::set_close_on_escape);
	ClassDB::bind_method(D_METHOD("get_close_on_escape"), &AcceptDialog::get_close_on_escape);
	ClassDB::bind_method(D_METHOD("add_button", "text", "right", "action"), &AcceptDialog::add_button, DEFVAL(false), DEFVAL(""));
	ClassDB::bind_method(D_METHOD("add_cancel_button", "name"), &AcceptDialog::add_cancel_button);
	ClassDB::bind_method(D_METHOD("remove_button", "button"), &AcceptDialog::remove_button);
	ClassDB::bind_method(D_METHOD("register_text_enter", "line_edit"), &AcceptDialog::register_text_enter);
	ClassDB::bind_method(D_METHOD("set_text", "text"), &AcceptDialog::set_text);
	ClassDB::bind_method(D_METHOD("get_text"), &AcceptDialog::get_text);
	ClassDB::bind_method(D_METHOD("set_autowrap", "autowrap"), &AcceptDialog::set_autowrap);
	ClassDB::bind_method(D_METHOD("has_autowrap"), &AcceptDialog::has_autowrap);
	ClassDB::bind_method(D_METHOD("set_ok_button_text", "text"), &AcceptDialog::set_ok_button_text);
	ClassDB::bind_method(D_METHOD("get_ok_button_text"), &AcceptDialog::get_ok_button_text);

	ADD_SIGNAL(MethodInfo("confirmed"));
	ADD_SIGNAL(MethodInfo("cancelled"));
	ADD_SIGNAL(MethodInfo("custom_action", PropertyInfo(Variant::STRING_NAME, "action")));

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "ok_button_text"), "set_ok_button_text", "get_ok_button_text");

	ADD_GROUP("Dialog", "dialog");
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "dialog_text", PROPERTY_HINT_MULTILINE_TEXT, "", PROPERTY_USAGE_DEFAULT_INTL), "set_text", "get_text");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "dialog_hide_on_ok"), "set_hide_on_ok", "get_hide_on_ok");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "dialog_close_on_escape"), "set_close_on_escape", "get_close_on_escape");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "dialog_autowrap"), "set_autowrap", "has_autowrap");
}

bool AcceptDialog::swap_cancel_ok = false;
void AcceptDialog::set_swap_cancel_ok(bool p_swap) {
	swap_cancel_ok = p_swap;
}

AcceptDialog::AcceptDialog() {
	set_wrap_controls(true);
	set_visible(false);
	set_transient(true);
	set_exclusive(true);
	set_clamp_to_embedder(true);

	bg_panel = memnew(Panel);
	add_child(bg_panel, false, INTERNAL_MODE_FRONT);

	buttons_hbox = memnew(HBoxContainer);

	message_label = memnew(Label);
	message_label->set_anchor(SIDE_RIGHT, Control::ANCHOR_END);
	message_label->set_anchor(SIDE_BOTTOM, Control::ANCHOR_END);
	add_child(message_label, false, INTERNAL_MODE_FRONT);

	add_child(buttons_hbox, false, INTERNAL_MODE_FRONT);

	buttons_hbox->add_spacer();
	ok_button = memnew(Button);
	ok_button->set_text("OK");
	buttons_hbox->add_child(ok_button);
	buttons_hbox->add_spacer();

	ok_button->connect("pressed", callable_mp(this, &AcceptDialog::_ok_pressed));

	set_title(TTRC("Alert!"));

	connect("window_input", callable_mp(this, &AcceptDialog::_input_from_window));
}

AcceptDialog::~AcceptDialog() {
}

// ConfirmationDialog

void ConfirmationDialog::set_cancel_button_text(String p_cancel_button_text) {
	cancel->set_text(p_cancel_button_text);
}

String ConfirmationDialog::get_cancel_button_text() const {
	return cancel->get_text();
}

void ConfirmationDialog::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_cancel_button"), &ConfirmationDialog::get_cancel_button);
	ClassDB::bind_method(D_METHOD("set_cancel_button_text", "text"), &ConfirmationDialog::set_cancel_button_text);
	ClassDB::bind_method(D_METHOD("get_cancel_button_text"), &ConfirmationDialog::get_cancel_button_text);

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "cancel_button_text"), "set_cancel_button_text", "get_cancel_button_text");
}

Button *ConfirmationDialog::get_cancel_button() {
	return cancel;
}

ConfirmationDialog::ConfirmationDialog() {
	set_title(TTRC("Please Confirm..."));
	set_min_size(Size2(200, 70));

	cancel = add_cancel_button();
}