<script>
import axios from '~/lib/utils/axios_utils';

import Flash from '~/flash';
import DeprecatedModal from '~/vue_shared/components/deprecated_modal.vue';
import { n__, s__, sprintf } from '~/locale';
import { redirectTo } from '~/lib/utils/url_utility';
import eventHub from '../event_hub';

export default {
  components: {
    DeprecatedModal,
  },
  props: {
    issueCount: {
      type: Number,
      required: true,
    },
    mergeRequestCount: {
      type: Number,
      required: true,
    },
    milestoneId: {
      type: Number,
      required: true,
    },
    milestoneTitle: {
      type: String,
      required: true,
    },
    milestoneUrl: {
      type: String,
      required: true,
    },
  },
  computed: {
    text() {
      const milestoneTitle = sprintf('<strong>%{milestoneTitle}</strong>', {
        milestoneTitle: this.milestoneTitle,
      });

      if (this.issueCount === 0 && this.mergeRequestCount === 0) {
        return sprintf(
          s__(`Milestones|
You’re about to permanently delete the milestone %{milestoneTitle}.
This milestone is not currently used in any issues or merge requests.`),
          {
            milestoneTitle,
          },
          false,
        );
      }

      return sprintf(
        s__(`Milestones|
You’re about to permanently delete the milestone %{milestoneTitle} and remove it from %{issuesWithCount} and %{mergeRequestsWithCount}.
Once deleted, it cannot be undone or recovered.`),
        {
          milestoneTitle,
          issuesWithCount: n__('%d issue', '%d issues', this.issueCount),
          mergeRequestsWithCount: n__(
            '%d merge request',
            '%d merge requests',
            this.mergeRequestCount,
          ),
        },
        false,
      );
    },
    title() {
      return sprintf(s__('Milestones|Delete milestone %{milestoneTitle}?'), {
        milestoneTitle: this.milestoneTitle,
      });
    },
  },
  methods: {
    onSubmit() {
      eventHub.$emit('deleteMilestoneModal.requestStarted', this.milestoneUrl);

      return axios
        .delete(this.milestoneUrl)
        .then(response => {
          eventHub.$emit('deleteMilestoneModal.requestFinished', {
            milestoneUrl: this.milestoneUrl,
            successful: true,
          });

          // follow the rediect to milestones overview page
          redirectTo(response.request.responseURL);
        })
        .catch(error => {
          eventHub.$emit('deleteMilestoneModal.requestFinished', {
            milestoneUrl: this.milestoneUrl,
            successful: false,
          });

          if (error.response && error.response.status === 404) {
            Flash(
              sprintf(s__('Milestones|Milestone %{milestoneTitle} was not found'), {
                milestoneTitle: this.milestoneTitle,
              }),
            );
          } else {
            Flash(
              sprintf(s__('Milestones|Failed to delete milestone %{milestoneTitle}'), {
                milestoneTitle: this.milestoneTitle,
              }),
            );
          }
          throw error;
        });
    },
  },
};
</script>

<template>
  <deprecated-modal
    id="delete-milestone-modal"
    :title="title"
    :text="text"
    :primary-button-label="s__('Milestones|Delete milestone')"
    kind="danger"
    @submit="onSubmit">

    <template
      slot="body"
      slot-scope="props">
      <p v-html="props.text"></p>
    </template>

  </deprecated-modal>
</template>
