<script>
import { GlButton, GlTabs, GlTab, GlLink, GlBadge } from '@gitlab/ui';
import DocLine from './doc_line.vue';

export default {
  components: {
    GlButton,
    GlTabs,
    GlTab,
    GlLink,
    GlBadge,
    DocLine,
  },
  props: {
    position: {
      type: Object,
      required: true,
    },
    data: {
      type: Object,
      required: true,
    },
    definitionPathPrefix: {
      type: String,
      required: true,
    },
    blobPath: {
      type: String,
      required: true,
    },
  },
  data() {
    return {
      offsetLeft: 0,
    };
  },
  computed: {
    isCurrentDefinition() {
      return this.data.definitionLineNumber - 1 === this.position.lineIndex;
    },
    positionStyles() {
      return {
        left: `${this.position.x - this.offsetLeft}px`,
        top: `${this.position.y + this.position.height}px`,
      };
    },
    definitionPath() {
      if (!this.data.definition_path) {
        return null;
      }

      if (this.isDefinitionCurrentBlob) {
        return `#L${this.data.definitionLineNumber}`;
      }

      return `${this.definitionPathPrefix}/${this.data.definition_path}`;
    },
    isDefinitionCurrentBlob() {
      return this.data.definition_path.indexOf(this.blobPath) === 0;
    },
    references() {
      return this.data.references || [];
    },
  },
  watch: {
    position: {
      handler() {
        this.$nextTick(() => this.updateOffsetLeft());
      },
      deep: true,
      immediate: true,
    },
  },
  methods: {
    updateOffsetLeft() {
      this.offsetLeft = Math.max(
        0,
        this.$el.offsetLeft + this.$el.offsetWidth - window.innerWidth + 20,
      );
    },
  },
  colorScheme: gon?.user_color_scheme,
};
</script>

<template>
  <div
    :style="positionStyles"
    class="popover code-navigation-popover popover-font-size-normal gl-popover bs-popover-bottom show"
  >
    <div :style="{ left: `${offsetLeft}px` }" class="arrow"></div>
    <gl-tabs nav-class="gl-hidden" content-class="gl-py-0">
      <gl-tab :title="__('Definition')">
        <div class="overflow-auto code-navigation-popover-container">
          <div
            v-for="(hover, index) in data.hover"
            :key="index"
            :class="{ 'border-bottom': index !== data.hover.length - 1 }"
          >
            <pre
              v-if="hover.language"
              ref="code-output"
              :class="$options.colorScheme"
              class="border-0 bg-transparent m-0 code highlight text-wrap"
            ><doc-line v-for="(tokens, tokenIndex) in hover.tokens" :key="tokenIndex" :language="hover.language" :tokens="tokens"/></pre>
            <p v-else ref="doc-output" class="p-3 m-0">
              {{ hover.value }}
            </p>
          </div>
        </div>
        <div v-if="definitionPath || isCurrentDefinition" class="popover-body border-top">
          <span v-if="isCurrentDefinition" class="gl-font-weight-bold gl-font-base">
            {{ s__('CodeIntelligence|This is the definition') }}
          </span>
          <gl-button
            v-else
            :href="definitionPath"
            :target="isDefinitionCurrentBlob ? null : '_blank'"
            class="w-100"
            variant="default"
            data-testid="go-to-definition-btn"
          >
            {{ __('Go to definition') }}
          </gl-button>
        </div>
      </gl-tab>
      <gl-tab data-testid="references-tab" class="py-2">
        <template #title>
          {{ __('References') }}
          <gl-badge size="sm" class="gl-tab-counter-badge">{{ references.length }}</gl-badge>
        </template>
        <template v-if="references.length">
          <div v-for="(reference, index) in references" :key="index" class="gl-dropdown-item">
            <gl-link
              :href="`${definitionPathPrefix}/${reference.path}`"
              class="dropdown-item"
              data-testid="reference-link"
            >
              {{ reference.path }}
            </gl-link>
          </div>
        </template>
        <p v-else class="gl-my-4 gl-px-4">
          {{ s__('CodeNavigation|No references found') }}
        </p>
      </gl-tab>
    </gl-tabs>
  </div>
</template>
