/*
 * Copyright 2000-2016 Vaadin Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.vaadin.tests.components.calendar;

import org.junit.Assert;
import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.WebElement;

import com.vaadin.tests.tb3.DndActionsTest;

/**
 * Test to check how DnD works for regular (not all day event) in calendar month
 * view.
 *
 * @author Vaadin Ltd
 */
public class CalendarMonthViewDndEventTest extends DndActionsTest {

    @Test
    public void dragAndDropEventToNextDay() {
        openTestURL();

        WebElement calendar = findElement(By.className("v-calendar"));
        int calendarRight = calendar.getLocation().getX()
                + calendar.getSize().getWidth();

        WebElement event = findElement(By.className("v-calendar-event"));
        int x = event.getLocation().getX();
        int width = event.getSize().getWidth();

        // does calendar have space on the right for one more event (i.e. day
        // cell on the right).
        boolean moveRight = event.getLocation().getX()
                + 2 * event.getSize().getWidth() <= calendarRight;

        WebElement cell = getParentCell(event, "v-calendar-month-day");

        int cellY = cell.getLocation().getY();
        int cellHeight = cell.getSize().getHeight();

        long origStart = getTime("start");
        long origEnd = getTime("end");

        if (moveRight) {
            dragAndDrop(event, event.getSize().getWidth() + 5, 0);
        } else {
            dragAndDrop(event, -width / 2, 0);
        }

        event = findElement(By.className("v-calendar-event"));
        int newX = event.getLocation().getX();
        int newY = event.getLocation().getY();

        Assert.assertTrue(
                "Moved event has wrong Y position (not the same row), new Y position="
                        + newY + ", cell Y position=" + cellY + ", cell height="
                        + cellHeight,
                newY >= cellY && newY < cellY + cellHeight);
        if (moveRight) {
            Assert.assertTrue(
                    "Moved event has wrong X position (not after original event)",
                    newX >= x + width - 1);
        } else {
            width = event.getSize().getWidth();
            Assert.assertTrue(
                    "Moved event has wrong X position (not after original event)",
                    x >= newX + width - 1);
        }

        long start = getTime("start");
        long end = getTime("end");

        int day = 24 * 3600000;
        if (moveRight) {
            Assert.assertEquals(
                    "Start date of moved event is not next day, same time",
                    origStart + day, start);
            Assert.assertEquals(
                    "End date of moved event is not next day, same time",
                    origEnd + day, end);
        } else {
            Assert.assertEquals(
                    "Start date of moved event is not previous day, same time",
                    origStart - day, start);
            Assert.assertEquals(
                    "End date of moved event is not previous day, same time",
                    origEnd - day, end);

        }
    }

    private WebElement getParentCell(WebElement element, String style) {
        WebElement parent = element;
        do {
            // ".." xpath expression chooses the parent of the element
            parent = parent.findElement(By.xpath(".."));
        } while (!parent.getAttribute("class").contains(style));
        return parent;
    }

    private long getTime(String style) {
        WebElement start = findElement(By.className(style));
        return Long.parseLong(start.getText());
    }
}