<script setup>
import SubstitutionDay from "./substitutions/SubstitutionDay.vue";
import CRUDIterator from "aleksis.core/components/generic/CRUDIterator.vue";
import DateSelectFooter from "aleksis.core/components/generic/DateSelectFooter.vue";
import SubjectChip from "aleksis.apps.cursus/components/SubjectChip.vue";

import {
  amendedLessonsFromAbsences,
  patchAmendLessonsWithAmends,
  groupsByOwner,
} from "./amendLesson.graphql";

import dateSortedIteratorMixin from "../mixins/dateSortedIteratorMixin.js";
</script>

<template>
  <c-r-u-d-iterator
    :gql-query="gqlQuery"
    :gql-additional-query-args="gqlQueryArgs"
    :gql-patch-mutation="gqlPatchMutation"
    :get-patch-data="gqlGetPatchData"
    i18n-key="chronos.substitutions.overview"
    :enable-search="true"
    :enable-create="false"
    :show-create="false"
    :enable-delete="false"
    :enable-edit="true"
    :elevated="false"
    :force-model-item-update="true"
    @lastQuery="lastQuery = $event"
    fixed-header
    disable-pagination
    hide-default-footer
    use-deep-search
  >
    <template #additionalActions="{ attrs, on }">
      <v-autocomplete
        :items="groups"
        item-text="name"
        clearable
        return-object
        filled
        dense
        hide-details
        :placeholder="$t('chronos.substitutions.overview.filter.groups')"
        :loading="$apollo.queries.groups.loading"
        :value="currentObj"
        @input="changeSelection"
        @click:clear="changeSelection"
      />
    </template>

    <template #default="{ items }">
      <substitution-day
        v-for="{ date, itemsOfDay, first, last } in groupItemsByDay(items)"
        v-intersect="{
            handler: intersectHandler(date, first, last),
            options: {
              rootMargin: '-' + topMargin + 'px 0px 0px 0px',
              threshold: [0, 1],
            },
          }"
        :date="date"
        :substitutions="itemsOfDay"
        :lastQuery="lastQuery"
        :focus-on-mount="initDate && (initDate.toMillis() === date.toMillis())"
        @init="transition"
        :key="'day-' + date"
        ref="days"
        />

      <date-select-footer
        :value="currentDate"
        @input="gotoDate"
        @prev="gotoPrev"
        @next="gotoNext"
        />
    </template>
  </c-r-u-d-iterator>
</template>

<script>
export default {
  name: "SubstitutionOverview",
  mixins: [dateSortedIteratorMixin],
  props: {
    objId: {
      type: [Number, String],
      required: false,
      default: null,
    },
  },
  data() {
    return {
      gqlQuery: amendedLessonsFromAbsences,
      gqlPatchMutation: patchAmendLessonsWithAmends,
      groups: [],
    };
  },
  methods: {
    gqlGetPatchData(item) {
      return { id: item.id, teachers: item.teachers };
    },
    changeSelection(selection) {
      this.$router.push({
        name: "chronos.substitutionOverview",
        params: {
          objId: selection.id,
        },
        hash: this.$route.hash,
      });
      this.resetDate();
    },
  },
  computed: {
    gqlQueryArgs() {
      return {
        objId: this.objId ? Number(this.objId) : null,
        dateStart: this.dateStart,
        dateEnd: this.dateEnd,
      };
    },
    currentObj() {
      return this.groups.find((o) => o.id === this.objId);
    },
  },
  apollo: {
    groups: groupsByOwner,
  },
};
</script>