import { storeActions } from "@/constants/store-actions";
import { setCookieProperties, getDeviceIdValue, getSessionIdValue, getSessionKeyValue } from "@/helpers/heritage-integration/cookie-helper";
import { queryStrings } from "@/constants/query-strings";
import { experimentSettings } from "@/constants/experiments";
import { analyticsPageEvents, GaCategories, GaActions, GaLabels, GaEvents } from "@/constants/analytics";
import { cookieNames } from "@/constants/cookie-names";

import baseMixin from "@/mixins/base-mixin";

export default {
  methods: {
    logPageView(pageEvent) {
      const currentPageName = getPageNameByQueryString();
      var payload = {
        userId: getDeviceIdValue(),
        sessionKey: getSessionKeyValue(),
        pageName: currentPageName,
        sessionId: getSessionIdValue(),
        action: '', 
        event: pageEvent,
        shouldUseSessionId: false,
      };

      baseMixin.methods.dispatchStoreAction(storeActions.LOG_PAGE_VIEW, payload, false);
    },

    logCustomEvent(category, action, label, value) {
      const currentPageName = getPageNameByQueryString();

      var payload = {
        userId: getDeviceIdValue(),
        sessionKey: getSessionKeyValue(),
        pageName: currentPageName,
        sessionId: getSessionIdValue(),
        category: category, 
        action: action,
        label: label,
        value: value,
        shouldUseSessionId: false,
      };

      baseMixin.methods.dispatchStoreAction(storeActions.LOG_CUSTOM_EVENT, payload, false);
    },

    pushEventToGA(category, action, label, pushToLogApp = false) {
      const currentPageName = getPageNameByQueryString();
      const eventToBePushed = {
        'event': GaEvents.GENERIC_EVENT,
        'category': category,
        'action': action,
        'label': label,
        'value': undefined,
        'path': `/fmg/?${queryStrings.FMG_PAGE}=${currentPageName}`
      }

      pushToDataLayerIfDefined(eventToBePushed);

      if (pushToLogApp) {
          this.logCustomEvent(category, action, label, undefined); 
      }

    },

    pushPageViewToGA() {
      const currentPageName = getPageNameByQueryString();
      const pageViewEvent = {
        'event': GaEvents.PAGE_VIEW_EVENT,
        'pagePath': `/fmg/?${queryStrings.FMG_PAGE}=${currentPageName}`,
        'pageTitle': currentPageName
      };

      pushToDataLayerIfDefined(pageViewEvent);

      this.logPageView(analyticsPageEvents.ENTRY);
    },

    pushExperimentsToDataLayer(experiments) {
      experiments?.forEach(exp => {

        // Set Google Dimension Index based on experiment settings.
        let googleDimensionIndex = 99;

        if (exp.settings[experimentSettings.GOOGLE_CUSTOM_DIMENSION_INDEX] !== undefined) {
          googleDimensionIndex = exp.settings[experimentSettings.GOOGLE_CUSTOM_DIMENSION_INDEX];
        }

        // Create object with dimension index and value.
        const experimentWithDimension = {
          [`experimentId_${googleDimensionIndex}`]: exp.universeId,
          [`variationId_${googleDimensionIndex}`]: exp.variationId,
          [`experimentName_${googleDimensionIndex}`]: exp.universeName,
          [`variationName_${googleDimensionIndex}`]: exp.variationName,
          [`customDimension_${googleDimensionIndex}`]: `${exp.universeId}_${exp.variationId}_${exp.universeName}_${exp.variationName}`
        };

        // Push to the data layer with the Google Custom Dimension Index.
        pushToDataLayerIfDefined(experimentWithDimension);
      });
    },
    
    prependActionToMethod(object, method, actionToPrepend) {
      const baseMethodName = method.name.startsWith('bound ') ? method.name.substring(6) : method.name ; 
      const baseMethod = object[baseMethodName]; 
      object[baseMethodName] = function () {
        actionToPrepend.apply(this, arguments);
        return baseMethod.apply(object, arguments);
      };
    },

    async initSession() {
      const sid = getSessionIdValue();
      const skey = getSessionKeyValue();
      var payload = {
        userId: getDeviceIdValue(),
        sessionId: sid,
        userAgent: navigator.userAgent,
        referrer: document.referrer,
      };
    
      const response = await baseMixin.methods.dispatchStoreAction(storeActions.INITIALIZE_SESSION, payload, false);
      
      if (response.data) {
        if (response.data.sessionKey && skey === 0) {
          setCookieProperties({ [cookieNames.SESSION_KEY]: response.data.sessionKey});
        }
        if (response.data.sessionId && sid === '00000000-0000-0000-0000-000000000000') {
          setCookieProperties({ [cookieNames.SESSION_ID]: response.data.sessionId});
        }
      }
    },
    
    noSession() {
      return getSessionKeyValue() === 0 || getSessionIdValue() === '00000000-0000-0000-0000-000000000000';
    }
  },
  computed: {
    analyticsPageEvents() {
      return analyticsPageEvents;
    },
    GaCategories() {
      return GaCategories;
    },
    GaActions() {
      return GaActions;
    },
    GaLabels() {
      return GaLabels;
    }
  },
};

function pushToDataLayerIfDefined(data) {
  if (window.dataLayer !== undefined) {
    window.dataLayer.push(data);
  }
}

function getPageNameByQueryString() {
  const params = new URLSearchParams(location.search);

  if (params.has(queryStrings.FMG_PAGE)) {
    return params.get(queryStrings.FMG_PAGE);
  } else {
    return '';
  }
}