/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. 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.
 */

import { delay } from 'bluebird';
import expect from 'expect.js';

import getUrl from '../../../src/test_utils/get_url';

export function CommonPageProvider({ getService, getPageObjects }) {
  const log = getService('log');
  const config = getService('config');
  const remote = getService('remote');
  const retry = getService('retry');
  const find = getService('find');
  const testSubjects = getService('testSubjects');
  const kibanaServer = getService('kibanaServer');
  const PageObjects = getPageObjects(['shield']);

  const defaultTryTimeout = config.get('timeouts.try');
  const defaultFindTimeout = config.get('timeouts.find');

  class CommonPage {
    getHostPort() {
      return getUrl.baseUrl(config.get('servers.kibana'));
    }

    getEsHostPort() {
      return getUrl.baseUrl(config.get('servers.elasticsearch'));
    }

    /**
     * @param {string} appName As defined in the apps config
     * @param {string} subUrl The route after the hash (#)
     */
    async navigateToUrl(appName, subUrl) {
      const appConfig = {
        ...config.get(['apps', appName]),
        // Overwrite the default hash with the URL we really want.
        hash: `${appName}/${subUrl}`,
      };

      const appUrl = getUrl.noAuth(config.get('servers.kibana'), appConfig);
      await retry.try(async () => {
        log.debug(`navigateToUrl ${appUrl}`);
        await remote.get(appUrl);
        const currentUrl = await this.loginIfPrompted(appUrl);
        if (!currentUrl.includes(appUrl)) {
          throw new Error(`expected ${currentUrl}.includes(${appUrl})`);
        }
      });
    }


    async loginIfPrompted(appUrl) {
      let currentUrl = await remote.getCurrentUrl();
      log.debug(`currentUrl = ${currentUrl}\n    appUrl = ${appUrl}`);
      await remote.setFindTimeout(defaultTryTimeout * 2).findByCssSelector('[data-test-subj="kibanaChrome"]');
      const loginPage = currentUrl.includes('/login');
      const wantedLoginPage = appUrl.includes('/login') || appUrl.includes('/logout');

      if (loginPage && !wantedLoginPage) {
        log.debug(`Found login page.  Logging in with username = ${config.get('servers.kibana.username')}`);
        await PageObjects.shield.login(
          config.get('servers.kibana.username'),
          config.get('servers.kibana.password')
        );
        await remote.setFindTimeout(20000).findByCssSelector('[data-test-subj="kibanaChrome"] nav:not(.ng-hide)');
        await remote.get(appUrl);
        currentUrl = await remote.getCurrentUrl();
        log.debug(`Finished login process currentUrl = ${currentUrl}`);
      }
      return currentUrl;
    }


    navigateToApp(appName) {
      const self = this;
      const appUrl = getUrl.noAuth(config.get('servers.kibana'), config.get(['apps', appName]));
      log.debug('navigating to ' + appName + ' url: ' + appUrl);

      function navigateTo(url) {
        return retry.try(function () {
          // since we're using hash URLs, always reload first to force re-render
          return kibanaServer.uiSettings.getDefaultIndex()
            .then(function (defaultIndex) {
              if (appName === 'discover' || appName === 'visualize' || appName === 'dashboard') {
                if (!defaultIndex) {
                  // https://github.com/elastic/kibana/issues/7496
                  // Even though most tests are using esClient to set the default index, sometimes Kibana clobbers
                  // that change.  If we got here, fix it.
                  log.debug(' >>>>>>>> WARNING Navigating to [' + appName + '] with defaultIndex=' + defaultIndex);
                  log.debug(' >>>>>>>> Setting defaultIndex to "logstash-*""');
                  return kibanaServer.uiSettings.update({
                    'dateFormat:tz': 'UTC',
                    'defaultIndex': 'logstash-*',
                    'telemetry:optIn': false
                  });
                }
              }
            })
            .then(function () {
              log.debug('navigate to: ' + url);
              return remote.get(url);
            })
            .then(function () {
              return self.sleep(700);
            })
            .then(function () {
              log.debug('returned from get, calling refresh');
              return remote.refresh();
            })
            .then(async function () {
              const currentUrl = await self.loginIfPrompted(appUrl);

              if (currentUrl.includes('app/kibana')) {
                await testSubjects.find('kibanaChrome');
              }
            })
            .then(async function () {
              const currentUrl = (await remote.getCurrentUrl()).replace(/\/\/\w+:\w+@/, '//');
              const maxAdditionalLengthOnNavUrl = 230;
              // On several test failures at the end of the TileMap test we try to navigate back to
              // Visualize so we can create the next Vertical Bar Chart, but we can see from the
              // logging and the screenshot that it's still on the TileMap page. Why didn't the "get"
              // with a new timestamped URL go? I thought that sleep(700) between the get and the
              // refresh would solve the problem but didn't seem to always work.
              // So this hack fails the navSuccessful check if the currentUrl doesn't match the
              // appUrl plus up to 230 other chars.
              // Navigating to Settings when there is a default index pattern has a URL length of 196
              // (from debug output). Some other tabs may also be long. But a rather simple configured
              // visualization is about 1000 chars long. So at least we catch that case.

              // Browsers don't show the ':port' if it's 80 or 443 so we have to
              // remove that part so we can get a match in the tests.
              const navSuccessful = new RegExp(appUrl.replace(':80', '').replace(':443', '')
                + '.{0,' + maxAdditionalLengthOnNavUrl + '}$')
                .test(currentUrl);

              if (!navSuccessful) {
                const msg = 'App failed to load: ' + appName +
                  ' in ' + defaultFindTimeout + 'ms' +
                  ' appUrl = ' + appUrl +
                  ' currentUrl = ' + currentUrl;
                log.debug(msg);
                throw new Error(msg);
              }

              return currentUrl;
            });
        });
      }

      return retry.tryForTime(defaultTryTimeout * 3, () => {
        return navigateTo(appUrl)
          .then(function (currentUrl) {
            let lastUrl = currentUrl;
            return retry.try(function () {
              // give the app time to update the URL
              return self.sleep(501)
                .then(function () {
                  return remote.getCurrentUrl();
                })
                .then(function (currentUrl) {
                  log.debug('in navigateTo url = ' + currentUrl);
                  if (lastUrl !== currentUrl) {
                    lastUrl = currentUrl;
                    throw new Error('URL changed, waiting for it to settle');
                  }
                });
            });
          })
          .then(async () => {
            if (appName === 'status_page') return;
            if (await testSubjects.exists('statusPageContainer')) {
              throw new Error('Navigation ended up at the status page.');
            }
          });
      });
    }

    runScript(fn, timeout = 10000) {
      // wait for deps on window before running script
      return remote
        .setExecuteAsyncTimeout(timeout)
        .executeAsync(function (done) {
          const interval = setInterval(function () {
            const ready = (document.readyState === 'complete');
            const hasJQuery = !!window.$;

            if (ready && hasJQuery) {
              console.log('doc ready, jquery loaded');
              clearInterval(interval);
              done();
            }
          }, 10);
        }).then(function () {
          return remote.execute(fn);
        });
    }

    async sleep(sleepMilliseconds) {
      log.debug('... sleep(' + sleepMilliseconds + ') start');
      await delay(sleepMilliseconds);
      log.debug('... sleep(' + sleepMilliseconds + ') end');
    }

    createErrorHandler(testObj) {
      const testName = (testObj.parent) ? [testObj.parent.name, testObj.name].join('_') : testObj.name;
      return error => {
        const now = Date.now();
        const fileName = `failure_${now}_${testName}`;

        return this.saveScreenshot(fileName, true)
          .then(function () {
            throw error;
          });
      };
    }

    async waitUntilUrlIncludes(path) {
      await retry.try(async () => {
        const url = await remote.getCurrentUrl();
        if (!url.includes(path)) {
          throw new Error('Url not found');
        }
      });
    }

    async getSharedItemTitleAndDescription() {
      const element = await find.byCssSelector('[data-shared-item]');
      return {
        title: await element.getAttribute('data-title'),
        description: await element.getAttribute('data-description')
      };
    }

    /**
     * Makes sure the modal overlay is not showing, tries a few times in case it is in the process of hiding.
     */
    async ensureModalOverlayHidden() {
      return retry.try(async () => {
        const shown = await testSubjects.exists('modalOverlay');
        if (shown) {
          throw new Error('Modal overlay is showing');
        }
      });
    }

    async clickConfirmOnModal() {
      log.debug('Clicking modal confirm');
      await testSubjects.click('confirmModalConfirmButton');
      await this.ensureModalOverlayHidden();
    }

    async pressEnterKey() {
      await remote.pressKeys('\uE007');
    }

    // pass in true if your test will show multiple modals
    // in succession
    async clickCancelOnModal(overlayWillStay = false) {
      log.debug('Clicking modal cancel');
      await testSubjects.click('confirmModalCancelButton');
      if (!overlayWillStay) {
        await this.ensureModalOverlayHidden();
      }
    }

    async expectConfirmModalOpenState(state) {
      if (typeof state !== 'boolean') {
        throw new Error('pass true or false to expectConfirmModalOpenState()');
      }

      log.debug(`expectConfirmModalOpenState(${state})`);

      // we use retry here instead of a simple .exists() check because the modal
      // fades in/out, which takes time, and we really only care that at some point
      // the modal is either open or closed
      await retry.try(async () => {
        const actualState = await testSubjects.exists('confirmModalCancelButton');
        expect(actualState).to.be(state);
      });
    }

    async getBreadcrumbPageTitle() {
      return await testSubjects.getVisibleText('breadcrumbPageTitle');
    }

    async getTopNavText() {
      return await testSubjects.getVisibleText('top-nav');
    }

    async doesCssSelectorExist(selector) {
      log.debug(`doesCssSelectorExist ${selector}`);

      const exists = await remote
        .setFindTimeout(1000)
        .findByCssSelector(selector)
        .then(() => true)
        .catch(() => false);

      remote.setFindTimeout(defaultFindTimeout);

      log.debug(`exists? ${exists}`);
      return exists;
    }

    async isChromeVisible() {
      const globalNavShown = await testSubjects.exists('globalNav');
      const topNavShown = await testSubjects.exists('top-nav');
      return globalNavShown && topNavShown;
    }

    async waitForTopNavToBeVisible() {
      await retry.try(async () => {
        const isNavVisible = await testSubjects.exists('top-nav');
        if (!isNavVisible) {
          throw new Error('Local nav not visible yet');
        }
      });
    }

    async closeToast() {
      const toast = await find.byCssSelector('.euiToast');
      await remote.moveMouseTo(toast);
      const title = await (await find.byCssSelector('.euiToastHeader__title')).getVisibleText();
      log.debug(title);
      await find.clickByCssSelector('.euiToast__closeButton');
      return title;
    }

    async clearAllToasts() {
      const toasts = await find.allByCssSelector('.euiToast');
      for (const toastElement of toasts) {
        try {
          await remote.moveMouseTo(toastElement);
          const closeBtn = await toastElement.findByCssSelector('.euiToast__closeButton');
          await closeBtn.click();
        } catch (err) {
          // ignore errors, toast clear themselves after timeout
        }
      }
    }
  }

  return new CommonPage();
}