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/*
 * The MIT License
 *
 * Copyright (c) 2009-2024 PrimeTek Informatics
 *
 * 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:
 *
 * 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. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.primefaces.selenium.component;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

import org.openqa.selenium.Keys;
import org.openqa.selenium.WebElement;
import org.primefaces.selenium.PrimeSelenium;
import org.primefaces.selenium.component.base.AbstractInputComponent;
import org.primefaces.selenium.component.base.ComponentUtils;
import org.primefaces.selenium.findby.FindByParentPartialId;

/**
 * Component wrapper for the PrimeFaces {@code p:calendar}.
 */
public abstract class Calendar extends AbstractInputComponent {

    @FindByParentPartialId("_input")
    private WebElement input;

    @Override
    public WebElement getInput() {
        return input;
    }

    /**
     * Is this component AJAX enabled with "dateSelect"?
     *
     * @return true if AJAX enabled false if not
     */
    public boolean isDateSelectAjaxified() {
        return ComponentUtils.hasAjaxBehavior(getRoot(), "dateSelect");
    }

    /**
     * Is this component AJAX enabled with "viewChange"?
     *
     * @return true if AJAX enabled false if not
     */
    public boolean isViewChangeAjaxified() {
        return ComponentUtils.hasAjaxBehavior(getRoot(), "viewChange");
    }

    /**
     * Is this component AJAX enabled with "close"?
     *
     * @return true if AJAX enabled false if not
     */
    public boolean isCloseAjaxified() {
        return ComponentUtils.hasAjaxBehavior(getRoot(), "close");
    }

    public LocalDateTime getValue() {
        Object date = PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate()");

        if (date == null) {
            return null;
        }

        long timeZoneOffset = PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate().getTimezoneOffset()");
        String utcTimeString = PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate().toUTCString();");

        // Parse time string and subtract the timezone offset
        return LocalDateTime.parse(utcTimeString, DateTimeFormatter.RFC_1123_DATE_TIME).minusMinutes(timeZoneOffset);
    }

    public LocalDate getValueAsLocalDate() {
        Object date = PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate()");
        if (date == null) {
            return null;
        }
        Long dayOfMonth = PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate().getDate();");
        Long month = PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate().getMonth();");
        Long year = PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate().getFullYear();");
        return LocalDate.of(year.intValue(), month.intValue() + 1, dayOfMonth.intValue());
    }

    public void setValue(LocalDate localDate) {
        setValue(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant().toEpochMilli());
    }

    public void setValue(LocalDateTime dateTime) {
        int timezoneOffset = (int) getTimezoneOffset();
        int timezoneOffsetHours = timezoneOffset / 60;
        int timezoneOffsetMinutes = timezoneOffset % 60;

        ZoneOffset zoneOffset = ZoneOffset.ofHoursMinutes(timezoneOffsetHours, timezoneOffsetMinutes);

        long millis = dateTime.atOffset(zoneOffset).toInstant().toEpochMilli();

        setValue(millis);
    }

    public void setValue(long millis) {
        if (PrimeSelenium.isSafari()) {
            // Safari not overwriting with command+a so use JS code
            setDate(millis);
        }
        else {
            String formattedDate = millisAsFormattedDate(millis);
            // Emulate user input instead of using js, calendar.setDate() can't go beyond mindate/maxdate

            // select everything
            selectAllText();

            // overwrite value
            if (isViewChangeAjaxified()) {
                PrimeSelenium.guardAjax(getInput()).sendKeys(formattedDate);
            }
            else {
                getInput().sendKeys(formattedDate);
            }

            // force change event
            if (isOnchangeAjaxified()) {
                PrimeSelenium.guardAjax(getInput()).sendKeys(Keys.TAB);
            }
            else {
                getInput().sendKeys(Keys.TAB);
            }
        }
    }

    /**
     * Widget API call to set date to this LocalDateTime.
     *
     * @param dateTime the LocalDateTime to set to
     */
    public void setDate(LocalDateTime dateTime) {
        long millis = dateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
        setDate(millis);
    }

    /**
     * Widget API call to set date to this epoch in millis.
     *
     * @param epoch epoch in milliseconds
     */
    public void setDate(long epoch) {
        PrimeSelenium.executeScript(getWidgetByIdScript() + ".setDate(new Date(" + epoch + "));");
    }

    /**
     * Gets the JS date value from the widget.
     *
     * @return the JS date value or null
     */
    public String getWidgetDate() {
        return PrimeSelenium.executeScript("return " + getWidgetByIdScript() + ".getDate();");
    }

    public String millisAsFormattedDate(long millis) {
        return PrimeSelenium.executeScript(
                    "return $.datepicker.formatDate(" + getWidgetByIdScript() + ".cfg.dateFormat, new Date(" + millis + "));");
    }

    public long getTimezoneOffset() {
        return (Long) PrimeSelenium.executeScript("return new Date().getTimezoneOffset();");
    }

}