/*
 * Copyright 2004-2007, Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Andrew McCall <mccall@@digitalparadise.co.uk>
 *		Julun <host.haiku@gmx.de>
 *
 */

#include "TimeWindow.h"
#include "BaseView.h"
#include "DateTimeView.h"
#include "TimeMessages.h"
#include "TimeSettings.h"
#include "ZoneView.h"


#include <Application.h>
#include <Message.h>
#include <Screen.h>
#include <TabView.h>
#include <Button.h>


TTimeWindow::TTimeWindow(BRect rect)
	: BWindow(rect, "Time", B_TITLED_WINDOW, B_NOT_RESIZABLE | B_NOT_ZOOMABLE)
{
	_InitWindow();
	_AlignWindow();

	AddShortcut('A', B_COMMAND_KEY, new BMessage(B_ABOUT_REQUESTED));
}


TTimeWindow::~TTimeWindow()
{
}


void
TTimeWindow::SetRevertStatus()
{
	fRevertButton->SetEnabled(fDateTimeView->CheckCanRevert()
		|| fTimeZoneView->CheckCanRevert());
}


void
TTimeWindow::MessageReceived(BMessage* message)
{
	switch(message->what) {
		case H_USER_CHANGE:
			fBaseView->ChangeTime(message);
			// To make sure no old time message is in the queue
			_SendTimeChangeFinished();
			SetRevertStatus();
			break;

		case B_ABOUT_REQUESTED:
			be_app->PostMessage(B_ABOUT_REQUESTED);
			break;

		case kMsgRevert:
			fDateTimeView->MessageReceived(message);
			fTimeZoneView->MessageReceived(message);
			fRevertButton->SetEnabled(false);
			break;

		case kRTCUpdate:
			fDateTimeView->MessageReceived(message);
			SetRevertStatus();
			break;

		default:
			BWindow::MessageReceived(message);
			break;
	}
}


bool
TTimeWindow::QuitRequested()
{
	TimeSettings().SetLeftTop(Frame().LeftTop());

	fBaseView->StopWatchingAll(fTimeZoneView);
	fBaseView->StopWatchingAll(fDateTimeView);

	be_app->PostMessage(B_QUIT_REQUESTED);

	return BWindow::QuitRequested();
}


void
TTimeWindow::_InitWindow()
{
	SetPulseRate(500000);

	fDateTimeView = new DateTimeView(Bounds());

	BRect bounds = fDateTimeView->Bounds();
	fTimeZoneView = new TimeZoneView(bounds);

	fBaseView = new TTimeBaseView(bounds, "baseView");
	AddChild(fBaseView);

	fBaseView->StartWatchingAll(fDateTimeView);
	fBaseView->StartWatchingAll(fTimeZoneView);

	bounds.OffsetBy(10.0, 10.0);
	BTabView* tabView = new BTabView(bounds.InsetByCopy(-5.0, -5.0),
		"tabView" , B_WIDTH_AS_USUAL, B_FOLLOW_NONE);

	BTab* tab = new BTab();
	tabView->AddTab(fDateTimeView, tab);
	tab->SetLabel("Date & Time");

	tab = new BTab();
	tabView->AddTab(fTimeZoneView, tab);
	tab->SetLabel("Time zone");

	fBaseView->AddChild(tabView);
	tabView->ResizeBy(0.0, tabView->TabHeight());

	BRect rect = Bounds();

	rect.left = 10;
	rect.top = rect.bottom - 10;

	fRevertButton = new BButton(rect, "revert", "Revert",
		new BMessage(kMsgRevert), B_FOLLOW_LEFT | B_FOLLOW_BOTTOM, B_WILL_DRAW);

	fRevertButton->ResizeToPreferred();
	fRevertButton->SetEnabled(false);
	float buttonHeight = fRevertButton->Bounds().Height();
	fRevertButton->MoveBy(0, -buttonHeight);
	fBaseView->AddChild(fRevertButton);
	fRevertButton->SetTarget(this);

	fBaseView->ResizeTo(tabView->Bounds().Width() + 10.0,
		tabView->Bounds().Height() + buttonHeight + 30.0);

	ResizeTo(fBaseView->Bounds().Width(), fBaseView->Bounds().Height());
}


void
TTimeWindow::_AlignWindow()
{
	BPoint pt = TimeSettings().LeftTop();
	MoveTo(pt);

	BRect frame = Frame();
	BRect screen = BScreen().Frame();
	if (!frame.Intersects(screen.InsetByCopy(50.0, 50.0))) {
		BRect bounds(Bounds());
		BPoint leftTop((screen.Width() - bounds.Width()) / 2.0,
			(screen.Height() - bounds.Height()) / 2.0);

		MoveTo(leftTop);
	}
}


void
TTimeWindow::_SendTimeChangeFinished()
{
	BMessenger messenger(fDateTimeView);
	BMessage msg(kChangeTimeFinished);
	messenger.SendMessage(&msg);
}