/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.myfaces.tobago.renderkit.css;

import org.apache.myfaces.tobago.component.Attributes;
import org.apache.myfaces.tobago.context.Markup;
import org.apache.myfaces.tobago.layout.AlignItems;
import org.apache.myfaces.tobago.layout.JustifyContent;
import org.apache.myfaces.tobago.layout.Margin;
import org.apache.myfaces.tobago.layout.MarginTokens;
import org.apache.myfaces.tobago.layout.Measure;
import org.apache.myfaces.tobago.layout.MeasureList;
import org.apache.myfaces.tobago.layout.SegmentJustify;
import org.apache.myfaces.tobago.layout.TextAlign;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import java.lang.invoke.MethodHandles;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * CSS classes for the Bootstrap Library.
 *
 * @since 3.0.0
 */
public enum BootstrapClass implements CssItem {

  ACTIVE("active"),
  ALERT("alert"),
  ALERT_DANGER("alert-danger"),
  ALERT_WARNING("alert-warning"),
  ALERT_INFO("alert-info"),
  ALERT_DISMISSIBLE("alert-dismissible"),
  ALIGN_ITEMS_BASELINE("align-items-baseline"),
  ALIGN_ITEMS_CENTER("align-items-center"),
  ALIGN_ITEMS_END("align-items-end"),
  ALIGN_ITEMS_START("align-items-start"),
  ALIGN_ITEMS_STRETCH("align-items-stretch"),
  /**
   * @deprecated since 5.0.0, please use {@link #POPOVER_ARROW} or {@link #TOOLTIP_ARROW}
   */
  @Deprecated
  ARROW("arrow"),
  BG_DANGER("bg-danger"),
  BG_DARK("bg-dark"),
  BG_INFO("bg-info"),
  BG_LIGHT("bg-light"),
  BG_PRIMARY("bg-primary"),
  BG_SECONDARY("bg-secondary"),
  BG_SUCCESS("bg-success"),
  BG_WARNING("bg-warning"),
  BADGE("badge"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_DANGER}
   */
  @Deprecated
  BADGE_DANGER("bg-danger"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_DARK}
   */
  @Deprecated
  BADGE_DARK("bg-dark"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_INFO}
   */
  @Deprecated
  BADGE_INFO("bg-info"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_LIGHT}
   */
  @Deprecated
  BADGE_LIGHT("bg-light"),
  /**
   * @deprecated since 5.0.0, please use {@link #ROUNDED_PILL}
   */
  @Deprecated
  BADGE_PILL("rounded-pill"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_PRIMARY}
   */
  @Deprecated
  BADGE_PRIMARY("bg-primary"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_SECONDARY}
   */
  @Deprecated
  BADGE_SECONDARY("bg-secondary"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_SUCCESS}
   */
  @Deprecated
  BADGE_SUCCESS("bg-success"),
  /**
   * @deprecated since 5.0.0, please use {@link #BG_WARNING}
   */
  @Deprecated
  BADGE_WARNING("bg-warning"),
  BORDER_DANGER("border-danger"),
  BORDER_INFO("border-info"),
  BORDER_WARNING("border-warning"),
  BTN("btn"),
  BTN_CLOSE("btn-close"),
  BTN_DANGER("btn-danger"),
  BTN_DARK("btn-dark"),
  BTN_GROUP("btn-group"),
  BTN_GROUP_VERTICAL("btn-group-vertical"),
  BTN_INFO("btn-info"),
  BTN_LIGHT("btn-light"),
  BTN_LINK("btn-link"),
  BTN_PRIMARY("btn-primary"),
  BTN_OUTLINE_DANGER("btn-outline-danger"),
  BTN_OUTLINE_DARK("btn-outline-dark"),
  BTN_OUTLINE_INFO("btn-outline-info"),
  BTN_OUTLINE_LIGHT("btn-outline-light"),
  BTN_OUTLINE_PRIMARY("btn-outline-primary"),
  BTN_OUTLINE_SECONDARY("btn-outline-secondary"),
  BTN_OUTLINE_SUCCESS("btn-outline-success"),
  BTN_OUTLINE_WARNING("btn-outline-warning"),
  BTN_SECONDARY("btn-secondary"),
  BTN_SUCCESS("btn-success"),
  BTN_TOOLBAR("btn-toolbar"),
  BTN_WARNING("btn-warning"),
  CARD("card"),
  CARD_BODY("card-body"),
  CARD_HEADER("card-header"),
  CARD_HEADER_TABS("card-header-tabs"),
  CARD_TITLE("card-title"),
  /**
   * @deprecated since 5.0.0, please use {@link #BTN_CLOSE}
   */
  @Deprecated
  CLOSE("btn-close"),
  COLLAPSE("collapse"),
  COL_FORM_LABEL("col-form-label"),
  COL_LG("col-lg"),
  COL_LG_1("col-lg-1"),
  COL_LG_2("col-lg-2"),
  COL_LG_3("col-lg-3"),
  COL_LG_4("col-lg-4"),
  COL_LG_5("col-lg-5"),
  COL_LG_6("col-lg-6"),
  COL_LG_7("col-lg-7"),
  COL_LG_8("col-lg-8"),
  COL_LG_9("col-lg-9"),
  COL_LG_10("col-lg-10"),
  COL_LG_11("col-lg-11"),
  COL_LG_12("col-lg-12"),
  COL_LG_AUTO("col-lg-auto"),
  COL_MD("col-md"),
  COL_MD_1("col-md-1"),
  COL_MD_2("col-md-2"),
  COL_MD_3("col-md-3"),
  COL_MD_4("col-md-4"),
  COL_MD_5("col-md-5"),
  COL_MD_6("col-md-6"),
  COL_MD_7("col-md-7"),
  COL_MD_8("col-md-8"),
  COL_MD_9("col-md-9"),
  COL_MD_10("col-md-10"),
  COL_MD_11("col-md-11"),
  COL_MD_12("col-md-12"),
  COL_MD_AUTO("col-md-auto"),
  COL_SM("col-sm"),
  COL_SM_1("col-sm-1"),
  COL_SM_2("col-sm-2"),
  COL_SM_3("col-sm-3"),
  COL_SM_4("col-sm-4"),
  COL_SM_5("col-sm-5"),
  COL_SM_6("col-sm-6"),
  COL_SM_7("col-sm-7"),
  COL_SM_8("col-sm-8"),
  COL_SM_9("col-sm-9"),
  COL_SM_10("col-sm-10"),
  COL_SM_11("col-sm-11"),
  COL_SM_12("col-sm-12"),
  COL_SM_AUTO("col-sm-auto"),
  COL_XL("col-xl"),
  COL_XL_1("col-xl-1"),
  COL_XL_2("col-xl-2"),
  COL_XL_3("col-xl-3"),
  COL_XL_4("col-xl-4"),
  COL_XL_5("col-xl-5"),
  COL_XL_6("col-xl-6"),
  COL_XL_7("col-xl-7"),
  COL_XL_8("col-xl-8"),
  COL_XL_9("col-xl-9"),
  COL_XL_10("col-xl-10"),
  COL_XL_11("col-xl-11"),
  COL_XL_12("col-xl-12"),
  COL_XL_AUTO("col-xl-auto"),
  COL("col"),
  COL_1("col-1"),
  COL_2("col-2"),
  COL_3("col-3"),
  COL_4("col-4"),
  COL_5("col-5"),
  COL_6("col-6"),
  COL_7("col-7"),
  COL_8("col-8"),
  COL_9("col-9"),
  COL_10("col-10"),
  COL_11("col-11"),
  COL_12("col-12"),
  COL_AUTO("col-auto"),
  CONTAINER("container"),
  CONTAINER_FLUID("container-fluid"),
  /**
   * @deprecated since 5.0.0, please use {@link #FORM_CHECK}
   */
  @Deprecated
  CUSTOM_CHECKBOX("form-check"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  CUSTOM_CONTROL("custom-control"),
  /**
   * @deprecated since 5.0.0, please use {@link #FORM_CHECK_LABEL} or maybe any other?
   */
  @Deprecated
  CUSTOM_CONTROL_LABEL("form-check-label"),
  /**
   * @deprecated since 5.0.0, please use {@link #FORM_CHECK_INLINE} or maybe any other?
   */
  @Deprecated
  CUSTOM_CONTROL_INLINE("form-check-inline"),
  /**
   * @deprecated since 5.0.0, please use {@link #FORM_CHECK_INPUT} or maybe any other?
   */
  @Deprecated
  CUSTOM_CONTROL_INPUT("form-check-input"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  CUSTOM_FILE("custom-file"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  CUSTOM_FILE_INPUT("custom-file-input"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  CUSTOM_FILE_LABEL("custom-file-label"),
  /**
   * @deprecated since 5.0.0, please use {@link #FORM_CHECK}
   */
  @Deprecated
  CUSTOM_RADIO("form-check"),
  /**
   * @deprecated since 5.0.0, please use {@link #FORM_SELECT}
   */
  @Deprecated
  CUSTOM_SELECT("form-select"),
  /**
   * @deprecated since 5.0.0, please use {@link #FORM_SWITCH}
   */
  @Deprecated
  CUSTOM_SWITCH("form-switch"),
  D_FLEX("d-flex"),
  D_INLINE("d-inline"),
  D_NONE("d-none"),
  D_SM_NONE("d-sm-none"),
  DISABLED("disabled"),
  DROPDOWN("dropdown"),
  DROPDOWN_DIVIDER("dropdown-divider"),
  DROPDOWN_ITEM("dropdown-item"),
  DROPDOWN_MENU("dropdown-menu"),
  DROPDOWN_MENU_END("dropdown-menu-end"),
  DROPDOWN_TOGGLE("dropdown-toggle"),
  FADE("fade"),
  FIGURE("figure"),
  FIGURE_CAPTION("figure-caption"),
  FIGURE_IMG("figure-img"),
  FIXED_BOTTOM("fixed-bottom"),
  /**
   * @deprecated since 5.0.0, please use {@link #STICKY_TOP}
   */
  @Deprecated
  FIXED_TOP("fixed-top"),
  FLEX_COLUMN("flex-column"),
  FLEX_COLUMN_REVERSE("flex-column-reverse"),
  FLEX_ROW("flex-row"),
  FLEX_ROW_REVERSE("flex-row-reverse"),
  /**
   * @deprecated since 5.0.0, please use {@link #FST_ITALIC}
   */
  @Deprecated
  FONT_ITALIC("fst-italic"),
  /**
   * @deprecated since 5.0.0, please use {@link #FW_BOLD}
   */
  @Deprecated
  FONT_WEIGHT_BOLD("font-weight-bold"),
  /**
   * @deprecated since 5.0.0, please use {@link #FW_LIGHT}
   */
  @Deprecated
  FONT_WEIGHT_LIGHT("font-weight-light"),
  FORM_CHECK("form-check"),
  FORM_CHECK_INLINE("form-check-inline"),
  FORM_CHECK_INPUT("form-check-input"),
  FORM_CHECK_LABEL("form-check-label"),
  FORM_CONTROL("form-control"),
  FORM_CONTROL_PLAINTEXT("form-control-plaintext"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  FORM_FILE("form-file"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  FORM_FILE_BUTTON("form-file-button"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  FORM_FILE_INPUT("form-file-input"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  FORM_FILE_LABEL("form-file-label"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  FORM_FILE_TEXT("form-file-text"),
  /**
   * @deprecated since 5.0.0, please use {@link #MB_3} or other
   */
  @Deprecated
  FORM_GROUP("form-group"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  FORM_INLINE("form-inline"),
  FORM_SELECT("form-select"),
  FORM_SWITCH("form-switch"),
  FST_ITALIC("fst-italic"),
  FW_BOLD("fw-bold"),
  FW_BOLDER("fw-bolder"),
  FW_NORMAL("fw-normal"),
  FW_LIGHT("fw-light"),
  FW_LIGHTER("fw-lighter"),
  INPUT_GROUP("input-group"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  INPUT_GROUP_APPEND("input-group-append"),
  /**
   * @deprecated since 5.0.0
   */
  @Deprecated
  INPUT_GROUP_PREPEND("input-group-prepend"),
  INPUT_GROUP_TEXT("input-group-text"),
  INVISIBLE("invisible"),
  JUSTIFY_CONTENT_AROUND("justify-content-around"),
  JUSTIFY_CONTENT_BETWEEN("justify-content-between"),
  JUSTIFY_CONTENT_CENTER("justify-content-center"),
  JUSTIFY_CONTENT_END("justify-content-end"),
  JUSTIFY_CONTENT_START("justify-content-start"),
  MB_0("mb-0"),
  MB_1("mb-1"),
  MB_2("mb-2"),
  MB_3("mb-3"),
  MB_4("mb-4"),
  MB_5("mb-5"),
  MB_AUTO("mb-auto"),
  MS_0("ms-0"),
  MS_1("ms-1"),
  MS_2("ms-2"),
  MS_3("ms-3"),
  MS_4("ms-4"),
  MS_5("ms-5"),
  MS_AUTO("ms-auto"),
  MS_LG_AUTO("ms-lg-auto"),
  MS_MD_AUTO("ms-md-auto"),
  MS_SM_AUTO("ms-sm-auto"),
  MS_XL_AUTO("ms-xl-auto"),
  MODAL("modal"),
  MODAL_CONTENT("modal-content"),
  MODAL_DIALOG("modal-dialog"),
  MODAL_LG("modal-lg"),
  MODAL_SM("modal-sm"),
  ME_0("me-0"),
  ME_1("me-1"),
  ME_2("me-2"),
  ME_3("me-3"),
  ME_4("me-4"),
  ME_5("me-5"),
  ME_AUTO("me-auto"),
  ME_LG_AUTO("me-lg-auto"),
  ME_MD_AUTO("me-md-auto"),
  ME_SM_AUTO("me-sm-auto"),
  ME_XL_AUTO("me-xl-auto"),
  MT_0("mt-0"),
  MT_1("mt-1"),
  MT_2("mt-2"),
  MT_3("mt-3"),
  MT_4("mt-4"),
  MT_5("mt-5"),
  MT_AUTO("mt-auto"),
  MY_LG_0("my-lg-0"),
  MY_LG_1("my-lg-1"),
  MY_LG_2("my-lg-2"),
  MY_LG_3("my-lg-3"),
  MY_LG_4("my-lg-4"),
  MY_LG_5("my-lg-5"),
  MX_AUTO("mx-auto"),
  MX_LG_AUTO("mx-lg-auto"),
  MX_MD_AUTO("mx-md-auto"),
  MX_SM_AUTO("mx-sm-auto"),
  MX_XL_AUTO("mx-xl-auto"),
  NAV("nav"),
  NAV_ITEM("nav-item"),
  NAV_LINK("nav-link"),
  NAV_TABS("nav-tabs"),
  NAVBAR("navbar"),
  NAVBAR_COLLAPSE("navbar-collapse"),
  NAVBAR_BRAND("navbar-brand"),
  NAVBAR_DARK("navbar-dark"),
  NAVBAR_EXPAND("navbar-expand"),
  NAVBAR_EXPAND_LG("navbar-expand-lg"),
  NAVBAR_EXPAND_MD("navbar-expand-md"),
  NAVBAR_EXPAND_SM("navbar-expand-sm"),
  NAVBAR_EXPAND_XL("navbar-expand-xl"),
  NAVBAR_LIGHT("navbar-light"),
  NAVBAR_NAV("navbar-nav"),
  NAVBAR_TOGGLER("navbar-toggler"),
  NAVBAR_TOGGLER_ICON("navbar-toggler-icon"),
  OFFSET_1("offset-1"),
  OFFSET_2("offset-2"),
  OFFSET_3("offset-3"),
  OFFSET_4("offset-4"),
  OFFSET_5("offset-5"),
  OFFSET_6("offset-6"),
  OFFSET_7("offset-7"),
  OFFSET_8("offset-8"),
  OFFSET_9("offset-9"),
  OFFSET_10("offset-10"),
  OFFSET_11("offset-11"),
  OFFSET_LG_0("offset-lg-0"),
  OFFSET_LG_1("offset-lg-1"),
  OFFSET_LG_2("offset-lg-2"),
  OFFSET_LG_3("offset-lg-3"),
  OFFSET_LG_4("offset-lg-4"),
  OFFSET_LG_5("offset-lg-5"),
  OFFSET_LG_6("offset-lg-6"),
  OFFSET_LG_7("offset-lg-7"),
  OFFSET_LG_8("offset-lg-8"),
  OFFSET_LG_9("offset-lg-9"),
  OFFSET_LG_10("offset-lg-10"),
  OFFSET_LG_11("offset-lg-11"),
  OFFSET_MD_0("offset-md-0"),
  OFFSET_MD_1("offset-md-1"),
  OFFSET_MD_2("offset-md-2"),
  OFFSET_MD_3("offset-md-3"),
  OFFSET_MD_4("offset-md-4"),
  OFFSET_MD_5("offset-md-5"),
  OFFSET_MD_6("offset-md-6"),
  OFFSET_MD_7("offset-md-7"),
  OFFSET_MD_8("offset-md-8"),
  OFFSET_MD_9("offset-md-9"),
  OFFSET_MD_10("offset-md-10"),
  OFFSET_MD_11("offset-md-11"),
  OFFSET_SM_0("offset-sm-0"),
  OFFSET_SM_1("offset-sm-1"),
  OFFSET_SM_2("offset-sm-2"),
  OFFSET_SM_3("offset-sm-3"),
  OFFSET_SM_4("offset-sm-4"),
  OFFSET_SM_5("offset-sm-5"),
  OFFSET_SM_6("offset-sm-6"),
  OFFSET_SM_7("offset-sm-7"),
  OFFSET_SM_8("offset-sm-8"),
  OFFSET_SM_9("offset-sm-9"),
  OFFSET_SM_10("offset-sm-10"),
  OFFSET_SM_11("offset-sm-11"),
  OFFSET_XL_0("offset-xl-0"),
  OFFSET_XL_1("offset-xl-1"),
  OFFSET_XL_2("offset-xl-2"),
  OFFSET_XL_3("offset-xl-3"),
  OFFSET_XL_4("offset-xl-4"),
  OFFSET_XL_5("offset-xl-5"),
  OFFSET_XL_6("offset-xl-6"),
  OFFSET_XL_7("offset-xl-7"),
  OFFSET_XL_8("offset-xl-8"),
  OFFSET_XL_9("offset-xl-9"),
  OFFSET_XL_10("offset-xl-10"),
  OFFSET_XL_11("offset-xl-11"),
  PAGE_ITEM("page-item"),
  PAGE_LINK("page-link"),
  PAGINATION("pagination"),
  POPOVER("popover"),
  POPOVER_ARROW("popover-arrow"),
  POPOVER_BODY("popover-body"),
  POPOVER_HEADER("popover-header"),
  PROGRESS("progress"),
  PROGRESS_BAR("progress-bar"),
  ROUNDED_PILL("rounded-pill"),
  ROW("row"),
  SHOW("show"),
  /**
   * @deprecated since 5.0.0, please use {@link #VISUALLY_HIDDEN}
   */
  @Deprecated
  SR_ONLY("sr-only"),
  STICKY_TOP("sticky-top"),
  TEXT_DANGER("text-danger"),
  TEXT_DARK("text-dark"),
  TEXT_INFO("text-info"),
  TEXT_LIGHT("text-light"),
  TEXT_PRIMARY("text-primary"),
  TEXT_SECONDARY("text-secondary"),
  TEXT_SUCCESS("text-success"),
  TEXT_WARNING("text-warning"),
  TEXT_CENTER("text-center"),
  /**
   * @deprecated since 5.0.0, please use {@link org.apache.myfaces.tobago.renderkit.css.TobagoClass#TEXT__JUSTIFY}
   */
  @Deprecated
  TEXT_JUSTIFY("tobago-text-justify"),
  /**
   * @deprecated since 5.0.0, use {@link #TEXT_START}
   */
  @Deprecated
  TEXT_LEFT("text-start"),
  TEXT_START("text-start"),
  /**
   * @deprecated since 5.0.0, use {@link #TEXT_END}
   */
  @Deprecated
  TEXT_RIGHT("text-end"),
  TEXT_END("text-end"),
  TAB_CONTENT("tab-content"),
  TAB_PANE("tab-pane"),
  TABLE("table"),
  TABLE_BORDERED("table-bordered"),
  TABLE_DARK("table-dark"),
  TABLE_HOVER("table-hover"),
  TABLE_INFO("table-info"),
  TABLE_SM("table-sm"),
  TABLE_STRIPED("table-striped"),
  TOOLTIP_ARROW("tooltip-arrow"),
  VISUALLY_HIDDEN("visually-hidden");

  private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

  private static final int SEVERITY_ERROR = FacesMessage.SEVERITY_ERROR.getOrdinal();
  private static final int SEVERITY_WARN = FacesMessage.SEVERITY_WARN.getOrdinal();
  private static final int SEVERITY_INFO = FacesMessage.SEVERITY_INFO.getOrdinal();

  private final String name;

  BootstrapClass(final String name) {
    this.name = name;
  }

  @Override
  public String getName() {
    return name;
  }

  public static CssItem alert(final FacesMessage.Severity severity) {

    // switch over severity.getOrdinal() doesn't work, because different implementations use different ordinals,
    // see MYFACES-3768
    // may be optimized with a cache...

    if (severity == null) {
      return null;
    } else if (severity.getOrdinal() >= SEVERITY_ERROR) {
      return ALERT_DANGER;
    } else if (severity.getOrdinal() >= SEVERITY_WARN) {
      return ALERT_WARNING;
    } else if (severity.getOrdinal() >= SEVERITY_INFO) {
      return ALERT_INFO;
    } else {
      return null;
    }
  }

  public static CssItem borderColor(final FacesMessage.Severity severity) {
    if (severity == null) {
      return null;
    }
    return getSeverityCssItem(severity, BORDER_INFO, BORDER_WARNING, BORDER_DANGER);
  }

  public static CssItem buttonColor(final FacesMessage.Severity severity) {
    if (severity == null) {
      return null;
    }
    return getSeverityCssItem(severity, BTN_INFO, BTN_WARNING, BTN_DANGER);
  }

  private static CssItem getSeverityCssItem(FacesMessage.Severity severity,
      BootstrapClass info, BootstrapClass warning, BootstrapClass error) {
    if (severity.equals(FacesMessage.SEVERITY_INFO)) {
      return info;
    } else if (severity.equals(FacesMessage.SEVERITY_WARN)) {
      return warning;
    } else {
      return error;
    }
  }

  public static CssItem segmentJustify(final SegmentJustify segmentJustify) {
    switch (segmentJustify) {
      case none:
        return null;
      case start:
        return BootstrapClass.JUSTIFY_CONTENT_START;
      case center:
        return BootstrapClass.JUSTIFY_CONTENT_CENTER;
      case end:
        return BootstrapClass.JUSTIFY_CONTENT_END;
      case around:
        return BootstrapClass.JUSTIFY_CONTENT_AROUND;
      case between:
        return BootstrapClass.JUSTIFY_CONTENT_BETWEEN;
      default:
        LOG.warn("Not a bootstrap class defined for {}", segmentJustify);
        return null;
    }
  }

  /**
   * @since 4.0.0
   */
  public static CssItem textAlign(final TextAlign textAlign) {
    switch (textAlign) {
      case left:
        return BootstrapClass.TEXT_START;
      case right:
        return BootstrapClass.TEXT_END;
      case justify:
        return TobagoClass.TEXT__JUSTIFY;
      case center:
        return BootstrapClass.TEXT_CENTER;
      default:
        LOG.warn("Not a bootstrap class defined for {}", textAlign);
        return BootstrapClass.TEXT_START;
    }
  }

  public static CssItem textColor(final Markup markup) {
    if (markup == null || markup.contains(Markup.NONE)) {
      return null;
    } else if (markup.contains(Markup.PRIMARY)) {
      return BootstrapClass.TEXT_PRIMARY;
    } else if (markup.contains(Markup.SECONDARY)) {
      return BootstrapClass.TEXT_SECONDARY;
    } else if (markup.contains(Markup.SUCCESS)) {
      return BootstrapClass.TEXT_SUCCESS;
    } else if (markup.contains(Markup.DANGER)) {
      return BootstrapClass.TEXT_DANGER;
    } else if (markup.contains(Markup.WARNING)) {
      return BootstrapClass.TEXT_WARNING;
    } else if (markup.contains(Markup.INFO)) {
      return BootstrapClass.TEXT_INFO;
    } else if (markup.contains(Markup.LIGHT)) {
      return BootstrapClass.TEXT_LIGHT;
    } else if (markup.contains(Markup.DARK)) {
      return BootstrapClass.TEXT_DARK;
    } else {
      return null;
    }
  }

  public static CssItem fontStyle(final Markup markup) {
    if (markup == null || markup.contains(Markup.NONE)) {
      return null;
    } else if (markup.contains(Markup.BOLD)) {
      return BootstrapClass.FW_BOLD;
    } else if (markup.contains(Markup.THIN)) {
      return BootstrapClass.FW_LIGHT;
    } else if (markup.contains(Markup.ITALIC)) {
      return BootstrapClass.FST_ITALIC;
    } else {
      return null;
    }
  }

  public static class Generator {

    private static final BootstrapClass[] OFFSET_EXTRA_SMALL = new BootstrapClass[]{
        null, OFFSET_1, OFFSET_2, OFFSET_3, OFFSET_4, OFFSET_5,
        OFFSET_6, OFFSET_7, OFFSET_8, OFFSET_9, OFFSET_10, OFFSET_11
    };
    private static final BootstrapClass[] OFFSET_SMALL = new BootstrapClass[]{
        OFFSET_SM_0, OFFSET_SM_1, OFFSET_SM_2, OFFSET_SM_3, OFFSET_SM_4, OFFSET_SM_5,
        OFFSET_SM_6, OFFSET_SM_7, OFFSET_SM_8, OFFSET_SM_9, OFFSET_SM_10, OFFSET_SM_11
    };
    private static final BootstrapClass[] OFFSET_MEDIUM = new BootstrapClass[]{
        OFFSET_MD_0, OFFSET_MD_1, OFFSET_MD_2, OFFSET_MD_3, OFFSET_MD_4, OFFSET_MD_5,
        OFFSET_MD_6, OFFSET_MD_7, OFFSET_MD_8, OFFSET_MD_9, OFFSET_MD_10, OFFSET_MD_11
    };
    private static final BootstrapClass[] OFFSET_LARGE = new BootstrapClass[]{
        OFFSET_LG_0, OFFSET_LG_1, OFFSET_LG_2, OFFSET_LG_3, OFFSET_LG_4, OFFSET_LG_5,
        OFFSET_LG_6, OFFSET_LG_7, OFFSET_LG_8, OFFSET_LG_9, OFFSET_LG_10, OFFSET_LG_11
    };
    private static final BootstrapClass[] OFFSET_EXTRA_LARGE = new BootstrapClass[]{
        OFFSET_XL_0, OFFSET_XL_1, OFFSET_XL_2, OFFSET_XL_3, OFFSET_XL_4, OFFSET_XL_5,
        OFFSET_XL_6, OFFSET_XL_7, OFFSET_XL_8, OFFSET_XL_9, OFFSET_XL_10, OFFSET_XL_11
    };

    private final MeasureList extraSmall;
    private final MeasureList small;
    private final MeasureList medium;
    private final MeasureList large;
    private final MeasureList extraLarge;
    private final MarginTokens marginExtraSmall;
    private final MarginTokens marginSmall;
    private final MarginTokens marginMedium;
    private final MarginTokens marginLarge;
    private final MarginTokens marginExtraLarge;

    private int index = 0;

    public Generator(
        final MeasureList extraSmall, final MeasureList small, final MeasureList medium,
        final MeasureList large, final MeasureList extraLarge,
        final MarginTokens marginExtraSmall, final MarginTokens marginSmall, final MarginTokens marginMedium,
        final MarginTokens marginLarge, final MarginTokens marginExtraLarge) {
      if (extraSmall == null && small == null && medium == null && large == null && extraLarge == null) {
        this.extraSmall = MeasureList.parse("*"); // TBD: is this needed? if yes, use Measure.FRACTION1
      } else {
        this.extraSmall = extraSmall;
      }
      this.small = small;
      this.medium = medium;
      this.large = large;
      this.extraLarge = extraLarge;
      this.marginExtraSmall = marginExtraSmall;
      this.marginSmall = marginSmall;
      this.marginMedium = marginMedium;
      this.marginLarge = marginLarge;
      this.marginExtraLarge = marginExtraLarge;
    }

    public void reset() {
      index = 0;
    }

    public void next() {
      index++;
    }

    public BootstrapClass[] generate(final UIComponent child) {
      final ArrayList<BootstrapClass> result = new ArrayList<>(10);
      final Map<String, Object> attributes = child.getAttributes();
      generate(result, extraSmall, attributes, Attributes.overwriteExtraSmall);
      generate(result, small, attributes, Attributes.overwriteSmall);
      generate(result, medium, attributes, Attributes.overwriteMedium);
      generate(result, large, attributes, Attributes.overwriteLarge);
      generate(result, extraLarge, attributes, Attributes.overwriteExtraLarge);

      generate(result, marginExtraSmall, attributes, Attributes.overwriteMarginExtraSmall);
      generate(result, marginSmall, attributes, Attributes.overwriteMarginSmall);
      generate(result, marginMedium, attributes, Attributes.overwriteMarginMedium);
      generate(result, marginLarge, attributes, Attributes.overwriteMarginLarge);
      generate(result, marginExtraLarge, attributes, Attributes.overwriteMarginExtraLarge);

      generateOffset(result, attributes.get(Attributes.offsetExtraSmall.name()), OFFSET_EXTRA_SMALL);
      generateOffset(result, attributes.get(Attributes.offsetSmall.name()), OFFSET_SMALL);
      generateOffset(result, attributes.get(Attributes.offsetMedium.name()), OFFSET_MEDIUM);
      generateOffset(result, attributes.get(Attributes.offsetLarge.name()), OFFSET_LARGE);
      generateOffset(result, attributes.get(Attributes.offsetExtraLarge.name()), OFFSET_EXTRA_LARGE);
      return result.toArray(new BootstrapClass[0]);
    }

    private void generate(
        final List<BootstrapClass> result, final MeasureList tokens,
        final Map<String, Object> attributes, final Attributes attribute) {
      final Object overwrite = attributes.get(attribute.name());

      if (overwrite != null) {
        final Measure measure = Measure.valueOf(overwrite.toString(), Measure.Unit.SEG);
        final BootstrapClass bootstrapClass = valueOf(getSegmentMeasure(measure), attribute);
        result.add(bootstrapClass);
      } else if (tokens != null && tokens.getSize() > 0) {
        final Measure measure = tokens.get(index % tokens.getSize());
        final BootstrapClass bootstrapClass = valueOf(getSegmentMeasure(measure), attribute);
        result.add(bootstrapClass);
      }
    }

    private Measure getSegmentMeasure(final Measure measure) {
      if (measure != null && Measure.Unit.SEG.equals(measure.getUnit())) {
        final int number = (int) measure.getValue();
        if (number < 1) {
          LOG.warn("Segment values must been between 1 and 12. Use '1' instead of '{}'.", number);
          return new Measure(1, Measure.Unit.SEG);
        } else if (number > 12) {
          LOG.warn("Segment values must been between 1 and 12. Use '12' instead of '{}'.", number);
          return new Measure(12, Measure.Unit.SEG);
        }
      }
      return measure;
    }

    private void generate(final List<BootstrapClass> result, final MarginTokens margins,
        final Map<String, Object> attributes, final Attributes attribute) {
      final Object overwrite = attributes.get(attribute.name());

      if (overwrite != null) {
        final Margin margin = MarginTokens.parseToken((String) overwrite);
        final BootstrapClass bootstrapClass = valueOf(margin, attribute);
        result.add(bootstrapClass);
      } else if (margins != null && margins.getSize() > 0) {
        final Margin margin = margins.get(index % margins.getSize());
        final BootstrapClass bootstrapClass = valueOf(margin, attribute);
        result.add(bootstrapClass);
      }
    }

    private void generateOffset(final List<BootstrapClass> result, final Object offset, final BootstrapClass[] values) {
      if (offset != null) {
        int offsetIndex = Integer.parseInt((String) offset);
        if (offsetIndex >= 0) {
          offsetIndex = Math.min(offsetIndex, 11);
          result.add(values[offsetIndex]);
        }
      }
    }
  }

  public static BootstrapClass valueOf(final Measure measure, final Attributes attributes) {
    final String size = getSizeSuffix(attributes);

    if (measure != null) {
      if (measure.getUnit() == Measure.Unit.FR) {
        return valueOf("COL" + size);
      } else if (measure.getUnit() == Measure.Unit.AUTO) {
        return valueOf("COL" + size + "_AUTO");
      } else if (measure.getUnit() == Measure.Unit.SEG) {
        final float value = measure.getValue();
        return valueOf(
            "COL" + size + "_" + (value == (long) value ? Long.toString((long) value) : Float.toString(value)));
      }
    }
    return null;
  }

  public static BootstrapClass valueOf(final Margin margin, final Attributes attribute) {
    final String size = getSizeSuffix(attribute);

    switch (margin) {
      case left:
        return valueOf("MS" + size + "_AUTO");
      case right:
        return valueOf("ME" + size + "_AUTO");
      case both:
        return valueOf("MX" + size + "_AUTO");
      default:
        return null;
    }
  }

  private static String getSizeSuffix(final Attributes attribute) {
    switch (attribute) {
      case extraLarge:
      case marginExtraLarge:
      case overwriteExtraLarge:
      case overwriteMarginExtraLarge:
        return "_XL";
      case large:
      case marginLarge:
      case overwriteLarge:
      case overwriteMarginLarge:
        return "_LG";
      case medium:
      case marginMedium:
      case overwriteMedium:
      case overwriteMarginMedium:
        return "_MD";
      case small:
      case marginSmall:
      case overwriteSmall:
      case overwriteMarginSmall:
        return "_SM";
      case extraSmall:
      case marginExtraSmall:
      case overwriteExtraSmall:
      case overwriteMarginExtraSmall:
      default:
        return "";
    }
  }

  public static CssItem valueOf(final AlignItems alignItems) {
    if (alignItems == null) {
      return null;
    } else {
      switch (alignItems) {
        case baseline:
          return ALIGN_ITEMS_BASELINE;
        case center:
          return ALIGN_ITEMS_CENTER;
        case flexEnd:
          return ALIGN_ITEMS_END;
        case flexStart:
          return ALIGN_ITEMS_START;
        case stretch:
          return ALIGN_ITEMS_STRETCH;
        default:
          LOG.warn("Undefined alignItems: '{}'.", alignItems);
          return null;
      }
    }
  }

  public static CssItem valueOf(final JustifyContent justifyContent) {
    if (justifyContent == null) {
      return null;
    } else {
      switch (justifyContent) {
        case center:
          return JUSTIFY_CONTENT_CENTER;
        case flexEnd:
          return JUSTIFY_CONTENT_END;
        case flexStart:
          return JUSTIFY_CONTENT_START;
        case spaceBetween:
          return JUSTIFY_CONTENT_BETWEEN;
        case spaceAround:
          return JUSTIFY_CONTENT_AROUND;
        default:
          LOG.warn("Undefined justifyContent: '{}'.", justifyContent);
          return null;
      }
    }
  }

}