import $ from 'dom7';
import { document } from 'ssr-window';
import Utils from '../../utils/utils';
import History from '../../utils/history';
import redirect from './redirect';
import processRouteQueue from './process-route-queue';

function refreshPage() {
  const router = this;
  return router.navigate(router.currentRoute.url, {
    ignoreCache: true,
    reloadCurrent: true,
  });
}

function forward(el, forwardOptions = {}) {
  const router = this;
  const app = router.app;
  const view = router.view;

  const options = Utils.extend(false, {
    animate: router.params.animate,
    pushState: true,
    replaceState: false,
    history: true,
    reloadCurrent: router.params.reloadPages,
    reloadPrevious: false,
    reloadAll: false,
    clearPreviousHistory: false,
    on: {},
  }, forwardOptions);

  let currentRouteIsModal = router.currentRoute.modal;
  let modalType;
  if (!currentRouteIsModal) {
    ('popup popover sheet loginScreen actions customModal panel').split(' ').forEach((modalLoadProp) => {
      if (router.currentRoute && router.currentRoute.route && router.currentRoute.route[modalLoadProp]) {
        currentRouteIsModal = true;
        modalType = modalLoadProp;
      }
    });
  }

  if (currentRouteIsModal) {
    const modalToClose = router.currentRoute.modal
                         || router.currentRoute.route.modalInstance
                         || app[modalType].get();
    const previousUrl = router.history[router.history.length - 2];
    let previousRoute = router.findMatchingRoute(previousUrl);
    if (!previousRoute && previousUrl) {
      previousRoute = {
        url: previousUrl,
        path: previousUrl.split('?')[0],
        query: Utils.parseUrlQuery(previousUrl),
        route: {
          path: previousUrl.split('?')[0],
          url: previousUrl,
        },
      };
    }

    router.modalRemove(modalToClose);
  }

  const dynamicNavbar = router.dynamicNavbar;
  const separateNavbar = router.separateNavbar;

  const $viewEl = router.$el;
  const $newPage = $(el);
  const reload = options.reloadPrevious || options.reloadCurrent || options.reloadAll;
  let $oldPage;

  let $navbarEl;
  let $newNavbarInner;
  let $oldNavbarInner;

  if ($newPage.length) {
    // Remove theme elements
    router.removeThemeElements($newPage);
  }

  if (dynamicNavbar) {
    $newNavbarInner = $newPage.children('.navbar').children('.navbar-inner');
    if (separateNavbar) {
      $navbarEl = router.$navbarEl;
      if ($newNavbarInner.length > 0) {
        $newPage.children('.navbar').remove();
      }
      if ($newNavbarInner.length === 0 && $newPage[0] && $newPage[0].f7Page) {
        // Try from pageData
        $newNavbarInner = $newPage[0].f7Page.$navbarEl;
      }
    }
  }

  router.allowPageChange = false;
  if ($newPage.length === 0) {
    router.allowPageChange = true;
    return router;
  }

  // Pages In View
  const $pagesInView = $viewEl
    .children('.page:not(.stacked)')
    .filter((index, pageInView) => pageInView !== $newPage[0]);

  // Navbars In View
  let $navbarsInView;
  if (separateNavbar) {
    $navbarsInView = $navbarEl
      .children('.navbar-inner:not(.stacked)')
      .filter((index, navbarInView) => navbarInView !== $newNavbarInner[0]);
  }

  // Exit when reload previous and only 1 page in view so nothing ro reload
  if (options.reloadPrevious && $pagesInView.length < 2) {
    router.allowPageChange = true;
    return router;
  }

  // New Page
  let newPagePosition = 'next';
  if (options.reloadCurrent || options.reloadAll) {
    newPagePosition = 'current';
  } else if (options.reloadPrevious) {
    newPagePosition = 'previous';
  }
  $newPage
    .addClass(`page-${newPagePosition}`)
    .removeClass('stacked')
    .trigger('page:unstack')
    .trigger('page:position', { position: newPagePosition });

  if (dynamicNavbar && $newNavbarInner.length) {
    $newNavbarInner
      .addClass(`navbar-${newPagePosition}`)
      .removeClass('stacked');
  }

  // Find Old Page
  if (options.reloadCurrent) {
    $oldPage = $pagesInView.eq($pagesInView.length - 1);
    if (separateNavbar) {
      // $oldNavbarInner = $navbarsInView.eq($pagesInView.length - 1);
      $oldNavbarInner = $(app.navbar.getElByPage($oldPage));
    }
  } else if (options.reloadPrevious) {
    $oldPage = $pagesInView.eq($pagesInView.length - 2);
    if (separateNavbar) {
      // $oldNavbarInner = $navbarsInView.eq($pagesInView.length - 2);
      $oldNavbarInner = $(app.navbar.getElByPage($oldPage));
    }
  } else if (options.reloadAll) {
    $oldPage = $pagesInView.filter((index, pageEl) => pageEl !== $newPage[0]);
    if (separateNavbar) {
      $oldNavbarInner = $navbarsInView.filter((index, navbarEl) => navbarEl !== $newNavbarInner[0]);
    }
  } else {
    if ($pagesInView.length > 1) {
      let i = 0;
      for (i = 0; i < $pagesInView.length - 1; i += 1) {
        const oldNavbarInnerEl = app.navbar.getElByPage($pagesInView.eq(i));
        if (router.params.stackPages) {
          $pagesInView.eq(i).addClass('stacked');
          $pagesInView.eq(i).trigger('page:stack');
          if (separateNavbar) {
            // $navbarsInView.eq(i).addClass('stacked');
            $(oldNavbarInnerEl).addClass('stacked');
          }
        } else {
          // Page remove event
          router.pageCallback('beforeRemove', $pagesInView[i], $navbarsInView && $navbarsInView[i], 'previous', undefined, options);
          router.removePage($pagesInView[i]);
          if (separateNavbar && oldNavbarInnerEl) {
            router.removeNavbar(oldNavbarInnerEl);
          }
        }
      }
    }
    $oldPage = $viewEl
      .children('.page:not(.stacked)')
      .filter((index, page) => page !== $newPage[0]);
    if (separateNavbar) {
      $oldNavbarInner = $navbarEl
        .children('.navbar-inner:not(.stacked)')
        .filter((index, navbarInner) => navbarInner !== $newNavbarInner[0]);
    }
  }
  if (dynamicNavbar && !separateNavbar) {
    $oldNavbarInner = $oldPage.children('.navbar').children('.navbar-inner');
  }

  // Push State
  if (router.params.pushState && (options.pushState || options.replaceState) && !options.reloadPrevious) {
    const pushStateRoot = router.params.pushStateRoot || '';
    History[options.reloadCurrent || options.reloadAll || options.replaceState ? 'replace' : 'push'](
      view.id,
      {
        url: options.route.url,
      },
      pushStateRoot + router.params.pushStateSeparator + options.route.url
    );
  }

  if (!options.reloadPrevious) {
    // Current Page & Navbar
    router.currentPageEl = $newPage[0];
    if (dynamicNavbar && $newNavbarInner.length) {
      router.currentNavbarEl = $newNavbarInner[0];
    } else {
      delete router.currentNavbarEl;
    }

    // Current Route
    router.currentRoute = options.route;
  }

  // Update router history
  const url = options.route.url;

  if (options.history) {
    if ((options.reloadCurrent && router.history.length) > 0 || options.replaceState) {
      router.history[router.history.length - (options.reloadPrevious ? 2 : 1)] = url;
    } else if (options.reloadPrevious) {
      router.history[router.history.length - 2] = url;
    } else if (options.reloadAll) {
      router.history = [url];
    } else {
      router.history.push(url);
    }
  }
  router.saveHistory();

  // Insert new page and navbar
  const newPageInDom = $newPage.parents(document).length > 0;
  const f7Component = $newPage[0].f7Component;
  if (options.reloadPrevious) {
    if (f7Component && !newPageInDom) {
      f7Component.$mount((componentEl) => {
        $(componentEl).insertBefore($oldPage);
      });
    } else {
      $newPage.insertBefore($oldPage);
    }
    if (separateNavbar && $newNavbarInner.length) {
      if ($oldNavbarInner.length) {
        $newNavbarInner.insertBefore($oldNavbarInner);
      } else {
        if (!router.$navbarEl.parents(document).length) {
          router.$el.prepend(router.$navbarEl);
        }
        $navbarEl.append($newNavbarInner);
      }
    }
  } else {
    if ($oldPage.next('.page')[0] !== $newPage[0]) {
      if (f7Component && !newPageInDom) {
        f7Component.$mount((componentEl) => {
          $viewEl.append(componentEl);
        });
      } else {
        $viewEl.append($newPage[0]);
      }
    }
    if (separateNavbar && $newNavbarInner.length) {
      if (!router.$navbarEl.parents(document).length) {
        router.$el.prepend(router.$navbarEl);
      }
      $navbarEl.append($newNavbarInner[0]);
    }
  }
  if (!newPageInDom) {
    router.pageCallback('mounted', $newPage, $newNavbarInner, newPagePosition, reload ? newPagePosition : 'current', options, $oldPage);
  }

  // Remove old page
  if (options.reloadCurrent && $oldPage.length > 0) {
    if (router.params.stackPages && router.initialPages.indexOf($oldPage[0]) >= 0) {
      $oldPage.addClass('stacked');
      $oldPage.trigger('page:stack');
      if (separateNavbar) {
        $oldNavbarInner.addClass('stacked');
      }
    } else {
      // Page remove event
      router.pageCallback('beforeRemove', $oldPage, $oldNavbarInner, 'previous', undefined, options);
      router.removePage($oldPage);
      if (separateNavbar && $oldNavbarInner && $oldNavbarInner.length) {
        router.removeNavbar($oldNavbarInner);
      }
    }
  } else if (options.reloadAll) {
    $oldPage.each((index, pageEl) => {
      const $oldPageEl = $(pageEl);
      const $oldNavbarInnerEl = $(app.navbar.getElByPage($oldPageEl));
      if (router.params.stackPages && router.initialPages.indexOf($oldPageEl[0]) >= 0) {
        $oldPageEl.addClass('stacked');
        $oldPageEl.trigger('page:stack');
        if (separateNavbar) {
          $oldNavbarInnerEl.addClass('stacked');
        }
      } else {
        // Page remove event
        router.pageCallback('beforeRemove', $oldPageEl, $oldNavbarInner && $oldNavbarInner.eq(index), 'previous', undefined, options);
        router.removePage($oldPageEl);
        if (separateNavbar && $oldNavbarInnerEl.length) {
          router.removeNavbar($oldNavbarInnerEl);
        }
      }
    });
  } else if (options.reloadPrevious) {
    if (router.params.stackPages && router.initialPages.indexOf($oldPage[0]) >= 0) {
      $oldPage.addClass('stacked');
      $oldPage.trigger('page:stack');
      if (separateNavbar) {
        $oldNavbarInner.addClass('stacked');
      }
    } else {
      // Page remove event
      router.pageCallback('beforeRemove', $oldPage, $oldNavbarInner, 'previous', undefined, options);
      router.removePage($oldPage);
      if (separateNavbar && $oldNavbarInner && $oldNavbarInner.length) {
        router.removeNavbar($oldNavbarInner);
      }
    }
  }

  // Load Tab
  if (options.route.route.tab) {
    router.tabLoad(options.route.route.tab, Utils.extend({}, options, {
      history: false,
      pushState: false,
    }));
  }

  // Page init and before init events
  router.pageCallback('init', $newPage, $newNavbarInner, newPagePosition, reload ? newPagePosition : 'current', options, $oldPage);

  if (options.reloadCurrent || options.reloadAll) {
    router.allowPageChange = true;
    router.pageCallback('beforeIn', $newPage, $newNavbarInner, newPagePosition, 'current', options);
    router.pageCallback('afterIn', $newPage, $newNavbarInner, newPagePosition, 'current', options);
    if (options.reloadCurrent && options.clearPreviousHistory) router.clearPreviousHistory();
    return router;
  }
  if (options.reloadPrevious) {
    router.allowPageChange = true;
    return router;
  }

  // Before animation event
  router.pageCallback('beforeIn', $newPage, $newNavbarInner, 'next', 'current', options);
  router.pageCallback('beforeOut', $oldPage, $oldNavbarInner, 'current', 'previous', options);

  // Animation
  function afterAnimation() {
    const pageClasses = 'page-previous page-current page-next';
    const navbarClasses = 'navbar-previous navbar-current navbar-next';
    $newPage.removeClass(pageClasses).addClass('page-current').removeAttr('aria-hidden');
    $oldPage.removeClass(pageClasses).addClass('page-previous').attr('aria-hidden', 'true');
    if (dynamicNavbar) {
      $newNavbarInner.removeClass(navbarClasses).addClass('navbar-current').removeAttr('aria-hidden');
      $oldNavbarInner.removeClass(navbarClasses).addClass('navbar-previous').attr('aria-hidden', 'true');
    }
    // After animation event
    router.allowPageChange = true;
    router.pageCallback('afterIn', $newPage, $newNavbarInner, 'next', 'current', options);
    router.pageCallback('afterOut', $oldPage, $oldNavbarInner, 'current', 'previous', options);

    let keepOldPage = app.theme === 'ios' ? (router.params.preloadPreviousPage || router.params.iosSwipeBack) : router.params.preloadPreviousPage;
    if (!keepOldPage) {
      if ($newPage.hasClass('smart-select-page') || $newPage.hasClass('photo-browser-page') || $newPage.hasClass('autocomplete-page')) {
        keepOldPage = true;
      }
    }
    if (!keepOldPage) {
      if (router.params.stackPages) {
        $oldPage.addClass('stacked');
        $oldPage.trigger('page:stack');
        if (separateNavbar) {
          $oldNavbarInner.addClass('stacked');
        }
      } else if (!($newPage.attr('data-name') && $newPage.attr('data-name') === 'smart-select-page')) {
        // Remove event
        router.pageCallback('beforeRemove', $oldPage, $oldNavbarInner, 'previous', undefined, options);
        router.removePage($oldPage);
        if (separateNavbar && $oldNavbarInner.length) {
          router.removeNavbar($oldNavbarInner);
        }
      }
    }
    if (options.clearPreviousHistory) router.clearPreviousHistory();
    router.emit('routeChanged', router.currentRoute, router.previousRoute, router);

    if (router.params.pushState) {
      History.clearRouterQueue();
    }
  }
  function setPositionClasses() {
    const pageClasses = 'page-previous page-current page-next';
    const navbarClasses = 'navbar-previous navbar-current navbar-next';
    $oldPage.removeClass(pageClasses).addClass('page-current').removeAttr('aria-hidden');
    $newPage.removeClass(pageClasses).addClass('page-next').removeAttr('aria-hidden');
    if (dynamicNavbar) {
      $oldNavbarInner.removeClass(navbarClasses).addClass('navbar-current').removeAttr('aria-hidden');
      $newNavbarInner.removeClass(navbarClasses).addClass('navbar-next').removeAttr('aria-hidden');
    }
  }
  if (options.animate) {
    const delay = router.app.theme === 'md' ? router.params.materialPageLoadDelay : router.params.iosPageLoadDelay;
    if (delay) {
      setTimeout(() => {
        setPositionClasses();
        router.animate($oldPage, $newPage, $oldNavbarInner, $newNavbarInner, 'forward', () => {
          afterAnimation();
        });
      }, delay);
    } else {
      setPositionClasses();
      router.animate($oldPage, $newPage, $oldNavbarInner, $newNavbarInner, 'forward', () => {
        afterAnimation();
      });
    }
  } else {
    afterAnimation();
  }
  return router;
}
function load(loadParams = {}, loadOptions = {}, ignorePageChange) {
  const router = this;
  if (!router.allowPageChange && !ignorePageChange) return router;
  const params = loadParams;
  const options = loadOptions;
  const { url, content, el, pageName, template, templateUrl, component, componentUrl } = params;

  if (!options.reloadCurrent
    && options.route
    && options.route.route
    && options.route.route.parentPath
    && router.currentRoute.route
    && router.currentRoute.route.parentPath === options.route.route.parentPath) {
    // Do something nested
    if (options.route.url === router.url) {
      router.allowPageChange = true;
      return false;
    }
    // Check for same params
    let sameParams = Object.keys(options.route.params).length === Object.keys(router.currentRoute.params).length;
    if (sameParams) {
      // Check for equal params name
      Object.keys(options.route.params).forEach((paramName) => {
        if (
          !(paramName in router.currentRoute.params)
          || (router.currentRoute.params[paramName] !== options.route.params[paramName])
        ) {
          sameParams = false;
        }
      });
    }
    if (sameParams) {
      if (options.route.route.tab) {
        return router.tabLoad(options.route.route.tab, options);
      }
      return false;
    }
  }

  if (
    options.route
    && options.route.url
    && router.url === options.route.url
    && !(options.reloadCurrent || options.reloadPrevious)
    && !router.params.allowDuplicateUrls
  ) {
    router.allowPageChange = true;
    return false;
  }

  if (!options.route && url) {
    options.route = router.parseRouteUrl(url);
    Utils.extend(options.route, { route: { url, path: url } });
  }

  // Component Callbacks
  function resolve(pageEl, newOptions) {
    return router.forward(pageEl, Utils.extend(options, newOptions));
  }
  function reject() {
    router.allowPageChange = true;
    return router;
  }

  if (url || templateUrl || componentUrl) {
    router.allowPageChange = false;
  }

  // Proceed
  if (content) {
    router.forward(router.getPageEl(content), options);
  } else if (template || templateUrl) {
    // Parse template and send page element
    try {
      router.pageTemplateLoader(template, templateUrl, options, resolve, reject);
    } catch (err) {
      router.allowPageChange = true;
      throw err;
    }
  } else if (el) {
    // Load page from specified HTMLElement or by page name in pages container
    router.forward(router.getPageEl(el), options);
  } else if (pageName) {
    // Load page by page name in pages container
    router.forward(router.$el.children(`.page[data-name="${pageName}"]`).eq(0), options);
  } else if (component || componentUrl) {
    // Load from component (F7/Vue/React/...)
    try {
      router.pageComponentLoader(router.el, component, componentUrl, options, resolve, reject);
    } catch (err) {
      router.allowPageChange = true;
      throw err;
    }
  } else if (url) {
    // Load using XHR
    if (router.xhr) {
      router.xhr.abort();
      router.xhr = false;
    }
    router.xhrRequest(url, options)
      .then((pageContent) => {
        router.forward(router.getPageEl(pageContent), options);
      })
      .catch(() => {
        router.allowPageChange = true;
      });
  }
  return router;
}
function navigate(navigateParams, navigateOptions = {}) {
  const router = this;
  if (router.swipeBackActive) return router;
  let url;
  let createRoute;
  let name;
  let query;
  let params;
  let route;
  if (typeof navigateParams === 'string') {
    url = navigateParams;
  } else {
    url = navigateParams.url;
    createRoute = navigateParams.route;
    name = navigateParams.name;
    query = navigateParams.query;
    params = navigateParams.params;
  }
  if (name) {
    // find route by name
    route = router.findRouteByKey('name', name);
    if (!route) {
      throw new Error(`Framework7: route with name "${name}" not found`);
    }
    url = router.constructRouteUrl(route, { params, query });
    if (url) {
      return router.navigate(url, navigateOptions);
    }
    throw new Error(`Framework7: can't construct URL for route with name "${name}"`);
  }
  const app = router.app;
  if (!router.view) {
    if (app.views.main) {
      app.views.main.router.navigate(url, navigateOptions);
    }
    return router;
  }
  if (url === '#' || url === '') {
    return router;
  }

  let navigateUrl = url.replace('./', '');
  if (navigateUrl[0] !== '/' && navigateUrl.indexOf('#') !== 0) {
    const currentPath = router.currentRoute.parentPath || router.currentRoute.path;
    navigateUrl = ((currentPath ? `${currentPath}/` : '/') + navigateUrl)
      .replace('///', '/')
      .replace('//', '/');
  }
  if (createRoute) {
    route = Utils.extend(router.parseRouteUrl(navigateUrl), {
      route: Utils.extend({}, createRoute),
    });
  } else {
    route = router.findMatchingRoute(navigateUrl);
  }

  if (!route) {
    return router;
  }

  if (route.route.redirect) {
    return redirect.call(router, 'navigate', route, navigateOptions);
  }


  const options = {};
  if (route.route.options) {
    Utils.extend(options, route.route.options, navigateOptions, { route });
  } else {
    Utils.extend(options, navigateOptions, { route });
  }

  if (options && options.context) {
    route.context = options.context;
    options.route.context = options.context;
  }

  function resolve() {
    let routerLoaded = false;
    ('popup popover sheet loginScreen actions customModal panel').split(' ').forEach((modalLoadProp) => {
      if (route.route[modalLoadProp] && !routerLoaded) {
        routerLoaded = true;
        router.modalLoad(modalLoadProp, route, options);
      }
    });
    ('url content component pageName el componentUrl template templateUrl').split(' ').forEach((pageLoadProp) => {
      if (route.route[pageLoadProp] && !routerLoaded) {
        routerLoaded = true;
        router.load({ [pageLoadProp]: route.route[pageLoadProp] }, options);
      }
    });
    if (routerLoaded) return;
    // Async
    function asyncResolve(resolveParams, resolveOptions) {
      router.allowPageChange = false;
      let resolvedAsModal = false;
      if (resolveOptions && resolveOptions.context) {
        if (!route.context) route.context = resolveOptions.context;
        else route.context = Utils.extend({}, route.context, resolveOptions.context);
        options.route.context = route.context;
      }
      ('popup popover sheet loginScreen actions customModal panel').split(' ').forEach((modalLoadProp) => {
        if (resolveParams[modalLoadProp]) {
          resolvedAsModal = true;
          const modalRoute = Utils.extend({}, route, { route: resolveParams });
          router.allowPageChange = true;
          router.modalLoad(modalLoadProp, modalRoute, Utils.extend(options, resolveOptions));
        }
      });
      if (resolvedAsModal) return;
      router.load(resolveParams, Utils.extend(options, resolveOptions), true);
    }
    function asyncReject() {
      router.allowPageChange = true;
    }
    if (route.route.async) {
      router.allowPageChange = false;

      route.route.async.call(router, options.route, router.currentRoute, asyncResolve, asyncReject);
    }
  }
  function reject() {
    router.allowPageChange = true;
  }

  processRouteQueue.call(
    router,
    route,
    router.currentRoute,
    () => {
      if (route.route.modules) {
        app
          .loadModules(Array.isArray(route.route.modules) ? route.route.modules : [route.route.modules])
          .then(() => {
            resolve();
          })
          .catch(() => {
            reject();
          });
      } else {
        resolve();
      }
    },
    () => {
      reject();
    },
  );

  // Return Router
  return router;
}
export { refreshPage, forward, load, navigate };
