/* underscore in name -> watch for changes */
const paramsList = ['eventsPrefix', 'injectStyles', 'injectStylesUrls', 'modules', 'init', '_direction', 'oneWayMovement', 'touchEventsTarget', 'initialSlide', '_speed', 'cssMode', 'updateOnWindowResize', 'resizeObserver', 'nested', 'focusableElements', '_enabled', '_width', '_height', 'preventInteractionOnTransition', 'userAgent', 'url', '_edgeSwipeDetection', '_edgeSwipeThreshold', '_freeMode', '_autoHeight', 'setWrapperSize', 'virtualTranslate', '_effect', 'breakpoints', 'breakpointsBase', '_spaceBetween', '_slidesPerView', 'maxBackfaceHiddenSlides', '_grid', '_slidesPerGroup', '_slidesPerGroupSkip', '_slidesPerGroupAuto', '_centeredSlides', '_centeredSlidesBounds', '_slidesOffsetBefore', '_slidesOffsetAfter', 'normalizeSlideIndex', '_centerInsufficientSlides', '_watchOverflow', 'roundLengths', 'touchRatio', 'touchAngle', 'simulateTouch', '_shortSwipes', '_longSwipes', 'longSwipesRatio', 'longSwipesMs', '_followFinger', 'allowTouchMove', '_threshold', 'touchMoveStopPropagation', 'touchStartPreventDefault', 'touchStartForcePreventDefault', 'touchReleaseOnEdges', 'uniqueNavElements', '_resistance', '_resistanceRatio', '_watchSlidesProgress', '_grabCursor', 'preventClicks', 'preventClicksPropagation', '_slideToClickedSlide', '_loop', 'loopAdditionalSlides', 'loopAddBlankSlides', 'loopPreventsSliding', '_rewind', '_allowSlidePrev', '_allowSlideNext', '_swipeHandler', '_noSwiping', 'noSwipingClass', 'noSwipingSelector', 'passiveListeners', 'containerModifierClass', 'slideClass', 'slideActiveClass', 'slideVisibleClass', 'slideFullyVisibleClass', 'slideNextClass', 'slidePrevClass', 'slideBlankClass', 'wrapperClass', 'lazyPreloaderClass', 'lazyPreloadPrevNext', 'runCallbacksOnInit', 'observer', 'observeParents', 'observeSlideChildren',
// modules
'a11y', '_autoplay', '_controller', 'coverflowEffect', 'cubeEffect', 'fadeEffect', 'flipEffect', 'creativeEffect', 'cardsEffect', 'hashNavigation', 'history', 'keyboard', 'mousewheel', '_navigation', '_pagination', 'parallax', '_scrollbar', '_thumbs', 'virtual', 'zoom', 'control'];

function isObject(o) {
  return typeof o === 'object' && o !== null && o.constructor && Object.prototype.toString.call(o).slice(8, -1) === 'Object' && !o.__swiper__;
}
function extend(target, src) {
  const noExtend = ['__proto__', 'constructor', 'prototype'];
  Object.keys(src).filter(key => noExtend.indexOf(key) < 0).forEach(key => {
    if (typeof target[key] === 'undefined') target[key] = src[key];else if (isObject(src[key]) && isObject(target[key]) && Object.keys(src[key]).length > 0) {
      if (src[key].__swiper__) target[key] = src[key];else extend(target[key], src[key]);
    } else {
      target[key] = src[key];
    }
  });
}
function needsNavigation(params) {
  if (params === void 0) {
    params = {};
  }
  return params.navigation && typeof params.navigation.nextEl === 'undefined' && typeof params.navigation.prevEl === 'undefined';
}
function needsPagination(params) {
  if (params === void 0) {
    params = {};
  }
  return params.pagination && typeof params.pagination.el === 'undefined';
}
function needsScrollbar(params) {
  if (params === void 0) {
    params = {};
  }
  return params.scrollbar && typeof params.scrollbar.el === 'undefined';
}
function uniqueClasses(classNames) {
  if (classNames === void 0) {
    classNames = '';
  }
  const classes = classNames.split(' ').map(c => c.trim()).filter(c => !!c);
  const unique = [];
  classes.forEach(c => {
    if (unique.indexOf(c) < 0) unique.push(c);
  });
  return unique.join(' ');
}
function attrToProp(attrName) {
  if (attrName === void 0) {
    attrName = '';
  }
  return attrName.replace(/-[a-z]/g, l => l.toUpperCase().replace('-', ''));
}
function wrapperClass(className) {
  if (className === void 0) {
    className = '';
  }
  if (!className) return 'swiper-wrapper';
  if (!className.includes('swiper-wrapper')) return `swiper-wrapper ${className}`;
  return className;
}

function updateSwiper(_ref) {
  let {
    swiper,
    slides,
    passedParams,
    changedParams,
    nextEl,
    prevEl,
    scrollbarEl,
    paginationEl
  } = _ref;
  const updateParams = changedParams.filter(key => key !== 'children' && key !== 'direction' && key !== 'wrapperClass');
  const {
    params: currentParams,
    pagination,
    navigation,
    scrollbar,
    virtual,
    thumbs
  } = swiper;
  let needThumbsInit;
  let needControllerInit;
  let needPaginationInit;
  let needScrollbarInit;
  let needNavigationInit;
  let loopNeedDestroy;
  let loopNeedEnable;
  let loopNeedReloop;
  if (changedParams.includes('thumbs') && passedParams.thumbs && passedParams.thumbs.swiper && currentParams.thumbs && !currentParams.thumbs.swiper) {
    needThumbsInit = true;
  }
  if (changedParams.includes('controller') && passedParams.controller && passedParams.controller.control && currentParams.controller && !currentParams.controller.control) {
    needControllerInit = true;
  }
  if (changedParams.includes('pagination') && passedParams.pagination && (passedParams.pagination.el || paginationEl) && (currentParams.pagination || currentParams.pagination === false) && pagination && !pagination.el) {
    needPaginationInit = true;
  }
  if (changedParams.includes('scrollbar') && passedParams.scrollbar && (passedParams.scrollbar.el || scrollbarEl) && (currentParams.scrollbar || currentParams.scrollbar === false) && scrollbar && !scrollbar.el) {
    needScrollbarInit = true;
  }
  if (changedParams.includes('navigation') && passedParams.navigation && (passedParams.navigation.prevEl || prevEl) && (passedParams.navigation.nextEl || nextEl) && (currentParams.navigation || currentParams.navigation === false) && navigation && !navigation.prevEl && !navigation.nextEl) {
    needNavigationInit = true;
  }
  const destroyModule = mod => {
    if (!swiper[mod]) return;
    swiper[mod].destroy();
    if (mod === 'navigation') {
      if (swiper.isElement) {
        swiper[mod].prevEl.remove();
        swiper[mod].nextEl.remove();
      }
      currentParams[mod].prevEl = undefined;
      currentParams[mod].nextEl = undefined;
      swiper[mod].prevEl = undefined;
      swiper[mod].nextEl = undefined;
    } else {
      if (swiper.isElement) {
        swiper[mod].el.remove();
      }
      currentParams[mod].el = undefined;
      swiper[mod].el = undefined;
    }
  };
  if (changedParams.includes('loop') && swiper.isElement) {
    if (currentParams.loop && !passedParams.loop) {
      loopNeedDestroy = true;
    } else if (!currentParams.loop && passedParams.loop) {
      loopNeedEnable = true;
    } else {
      loopNeedReloop = true;
    }
  }
  updateParams.forEach(key => {
    if (isObject(currentParams[key]) && isObject(passedParams[key])) {
      Object.assign(currentParams[key], passedParams[key]);
      if ((key === 'navigation' || key === 'pagination' || key === 'scrollbar') && 'enabled' in passedParams[key] && !passedParams[key].enabled) {
        destroyModule(key);
      }
    } else {
      const newValue = passedParams[key];
      if ((newValue === true || newValue === false) && (key === 'navigation' || key === 'pagination' || key === 'scrollbar')) {
        if (newValue === false) {
          destroyModule(key);
        }
      } else {
        currentParams[key] = passedParams[key];
      }
    }
  });
  if (updateParams.includes('controller') && !needControllerInit && swiper.controller && swiper.controller.control && currentParams.controller && currentParams.controller.control) {
    swiper.controller.control = currentParams.controller.control;
  }
  if (changedParams.includes('children') && slides && virtual && currentParams.virtual.enabled) {
    virtual.slides = slides;
    virtual.update(true);
  } else if (changedParams.includes('virtual') && virtual && currentParams.virtual.enabled) {
    if (slides) virtual.slides = slides;
    virtual.update(true);
  }
  if (changedParams.includes('children') && slides && currentParams.loop) {
    loopNeedReloop = true;
  }
  if (needThumbsInit) {
    const initialized = thumbs.init();
    if (initialized) thumbs.update(true);
  }
  if (needControllerInit) {
    swiper.controller.control = currentParams.controller.control;
  }
  if (needPaginationInit) {
    if (swiper.isElement && (!paginationEl || typeof paginationEl === 'string')) {
      paginationEl = document.createElement('div');
      paginationEl.classList.add('swiper-pagination');
      paginationEl.part.add('pagination');
      swiper.el.appendChild(paginationEl);
    }
    if (paginationEl) currentParams.pagination.el = paginationEl;
    pagination.init();
    pagination.render();
    pagination.update();
  }
  if (needScrollbarInit) {
    if (swiper.isElement && (!scrollbarEl || typeof scrollbarEl === 'string')) {
      scrollbarEl = document.createElement('div');
      scrollbarEl.classList.add('swiper-scrollbar');
      scrollbarEl.part.add('scrollbar');
      swiper.el.appendChild(scrollbarEl);
    }
    if (scrollbarEl) currentParams.scrollbar.el = scrollbarEl;
    scrollbar.init();
    scrollbar.updateSize();
    scrollbar.setTranslate();
  }
  if (needNavigationInit) {
    if (swiper.isElement) {
      if (!nextEl || typeof nextEl === 'string') {
        nextEl = document.createElement('div');
        nextEl.classList.add('swiper-button-next');
        nextEl.innerHTML = swiper.hostEl.constructor.nextButtonSvg;
        nextEl.part.add('button-next');
        swiper.el.appendChild(nextEl);
      }
      if (!prevEl || typeof prevEl === 'string') {
        prevEl = document.createElement('div');
        prevEl.classList.add('swiper-button-prev');
        prevEl.innerHTML = swiper.hostEl.constructor.prevButtonSvg;
        prevEl.part.add('button-prev');
        swiper.el.appendChild(prevEl);
      }
    }
    if (nextEl) currentParams.navigation.nextEl = nextEl;
    if (prevEl) currentParams.navigation.prevEl = prevEl;
    navigation.init();
    navigation.update();
  }
  if (changedParams.includes('allowSlideNext')) {
    swiper.allowSlideNext = passedParams.allowSlideNext;
  }
  if (changedParams.includes('allowSlidePrev')) {
    swiper.allowSlidePrev = passedParams.allowSlidePrev;
  }
  if (changedParams.includes('direction')) {
    swiper.changeDirection(passedParams.direction, false);
  }
  if (loopNeedDestroy || loopNeedReloop) {
    swiper.loopDestroy();
  }
  if (loopNeedEnable || loopNeedReloop) {
    swiper.loopCreate();
  }
  swiper.update();
}

export { needsPagination as a, needsScrollbar as b, attrToProp as c, uniqueClasses as d, extend as e, isObject as i, needsNavigation as n, paramsList as p, updateSwiper as u, wrapperClass as w };