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import Vue from 'vue';
import Translate from '~/vue_shared/translate';
import PromoteMilestoneModal from './components/promote_milestone_modal.vue';
import eventHub from './event_hub';

Vue.use(Translate);

export default () => {
  const onRequestFinished = ({ milestoneUrl, successful }) => {
    const button = document.querySelector(`.js-promote-project-milestone-button[data-url="${milestoneUrl}"]`);

    if (!successful) {
      button.removeAttribute('disabled');
    }
  };

  const onRequestStarted = (milestoneUrl) => {
    const button = document.querySelector(`.js-promote-project-milestone-button[data-url="${milestoneUrl}"]`);
    button.setAttribute('disabled', '');
    eventHub.$once('promoteMilestoneModal.requestFinished', onRequestFinished);
  };

  const onDeleteButtonClick = (event) => {
    const button = event.currentTarget;
    const modalProps = {
      milestoneTitle: button.dataset.milestoneTitle,
      url: button.dataset.url,
    };
    eventHub.$once('promoteMilestoneModal.requestStarted', onRequestStarted);
    eventHub.$emit('promoteMilestoneModal.props', modalProps);
  };

  const promoteMilestoneButtons = document.querySelectorAll('.js-promote-project-milestone-button');
  promoteMilestoneButtons.forEach((button) => {
    button.addEventListener('click', onDeleteButtonClick);
  });

  eventHub.$once('promoteMilestoneModal.mounted', () => {
    promoteMilestoneButtons.forEach((button) => {
      button.removeAttribute('disabled');
    });
  });

  const promoteMilestoneModal = document.getElementById('promote-milestone-modal');
  let promoteMilestoneComponent;

  if (promoteMilestoneModal) {
    promoteMilestoneComponent = new Vue({
      el: promoteMilestoneModal,
      components: {
        PromoteMilestoneModal,
      },
      data() {
        return {
          modalProps: {
            milestoneTitle: '',
            url: '',
          },
        };
      },
      mounted() {
        eventHub.$on('promoteMilestoneModal.props', this.setModalProps);
        eventHub.$emit('promoteMilestoneModal.mounted');
      },
      beforeDestroy() {
        eventHub.$off('promoteMilestoneModal.props', this.setModalProps);
      },
      methods: {
        setModalProps(modalProps) {
          this.modalProps = modalProps;
        },
      },
      render(createElement) {
        return createElement('promote-milestone-modal', {
          props: this.modalProps,
        });
      },
    });
  }

  return promoteMilestoneComponent;
};