import Vue from 'vue';
import { mapActions } from 'vuex';

import Cookies from 'js-cookie';
import { GlBreakpointInstance as bp } from '@gitlab/ui/dist/utils';
import { convertObjectPropsToCamelCase, parseBoolean } from '~/lib/utils/common_utils';

import createStore from './store';
import EpicApp from './components/epic_app.vue';
import EpicCreateApp from './components/epic_create.vue';

export default (epicCreate = false) => {
  const el = document.getElementById(epicCreate ? 'epic-create-root' : 'epic-app-root');

  if (!el) {
    return false;
  }

  const store = createStore();

  if (epicCreate) {
    return new Vue({
      el,
      store,
      components: { EpicCreateApp },
      created() {
        this.setEpicMeta({
          endpoint: el.dataset.endpoint,
        });
      },
      methods: {
        ...mapActions(['setEpicMeta']),
      },
      render: createElement =>
        createElement('epic-create-app', {
          props: {
            alignRight: el.dataset.alignRight,
          },
        }),
    });
  }

  const epicMeta = convertObjectPropsToCamelCase(JSON.parse(el.dataset.meta), { deep: true });
  const epicData = JSON.parse(el.dataset.initial);

  // Collapse the sidebar on mobile screens by default
  const bpBreakpoint = bp.getBreakpointSize();
  if (bpBreakpoint === 'xs' || bpBreakpoint === 'sm' || bpBreakpoint === 'md') {
    Cookies.set('collapsed_gutter', true);
  }

  return new Vue({
    el,
    store,
    components: { EpicApp },
    created() {
      this.setEpicMeta({
        ...epicMeta,
        allowSubEpics: parseBoolean(el.dataset.allowSubEpics),
      });
      this.setEpicData(epicData);
    },
    methods: {
      ...mapActions(['setEpicMeta', 'setEpicData']),
    },
    render: createElement => createElement('epic-app'),
  });
};
