<script>
import { mapActions } from 'vuex';
import RepoTab from './repo_tab.vue';
import EditorMode from './editor_mode_dropdown.vue';
import router from '../ide_router';

export default {
  components: {
    RepoTab,
    EditorMode,
  },
  props: {
    activeFile: {
      type: Object,
      required: true,
    },
    files: {
      type: Array,
      required: true,
    },
    viewer: {
      type: String,
      required: true,
    },
    hasChanges: {
      type: Boolean,
      required: true,
    },
    mergeRequestId: {
      type: String,
      required: false,
      default: '',
    },
  },
  data() {
    return {
      showShadow: false,
    };
  },
  updated() {
    if (!this.$refs.tabsScroller) return;

    this.showShadow = this.$refs.tabsScroller.scrollWidth > this.$refs.tabsScroller.offsetWidth;
  },
  methods: {
    ...mapActions(['updateViewer', 'removePendingTab']),
    openFileViewer(viewer) {
      this.updateViewer(viewer);

      if (this.activeFile.pending) {
        return this.removePendingTab(this.activeFile).then(() => {
          router.push(`/project${this.activeFile.url}`);
        });
      }

      return null;
    },
  },
};
</script>

<template>
  <div class="multi-file-tabs">
    <ul
      class="list-unstyled append-bottom-0"
      ref="tabsScroller"
    >
      <repo-tab
        v-for="tab in files"
        :key="tab.key"
        :tab="tab"
      />
    </ul>
    <editor-mode
      :viewer="viewer"
      :show-shadow="showShadow"
      :has-changes="hasChanges"
      :merge-request-id="mergeRequestId"
      @click="openFileViewer"
    />
  </div>
</template>
