<script setup>
import AmendedLessonCard from "./AmendedLessonCard.vue";
import CRUDIterator from "aleksis.core/components/generic/CRUDIterator.vue";
import DateField from "aleksis.core/components/generic/forms/DateField.vue";
import SubjectChip from "aleksis.apps.cursus/components/SubjectChip.vue";

import { DateTime } from "luxon";

import {
  amendedLessonsFromAbsences,
  batchPatchAmendLessons,
  groupsByOwner,
} from "./amendLesson.graphql";
</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.amend_lesson.overview"
    :enable-search="true"
    :enable-create="false"
    :show-create="false"
    :enable-delete="false"
    :enable-edit="true"
    :force-model-item-update="true"
    @lastQuery="lastQuery = $event"
  >
    <template #additionalActions="{ attrs, on }">
      <v-autocomplete
        :items="groups"
        item-text="name"
        clearable
        return-object
        filled
        dense
        hide-details
        :placeholder="$t('chronos.amend_lesson.overview.filter.groups')"
        :loading="$apollo.queries.groups.loading"
        :value="currentObj"
        @input="changeSelection"
        @click:clear="changeSelection"
      />
    </template>

    <template #default="{ items }">
      <v-list-item v-for="day in groupAmendedLessonsByDay(items)" two-line>
        <v-list-item-content>
          <v-list-item-title>{{ $d(day[0], "short") }}</v-list-item-title>
          <v-list>
            <v-list-item v-for="amendedLesson in day.slice(1)">
              <amended-lesson-card
                :amended-lesson="amendedLesson"
                :affected-query="lastQuery"
                :is-create="false"
                :gql-patch-mutation="batchPatchAmendLessons"
              />
            </v-list-item>
          </v-list>
        </v-list-item-content>
      </v-list-item>
    </template>
  </c-r-u-d-iterator>
</template>

<script>
export default {
  props: {
    objId: {
      type: [Number, String],
      required: false,
      default: null,
    },
    // Next two in ISODate
    dateStart: {
      type: String,
      required: false,
      default: "",
    },
    dateEnd: {
      type: String,
      required: false,
      default: "",
    },
  },
  data() {
    return {
      gqlQuery: amendedLessonsFromAbsences,
      gqlPatchMutation: batchPatchAmendLessons,
      lastQuery: null,
      groups: [],
    };
  },
  methods: {
    groupAmendedLessonsByDay(amendedLessons) {
      const byDay = amendedLessons.reduce((byDay, amendedLesson) => {
        const day = DateTime.fromISO(amendedLesson.datetimeStart).startOf(
          "day",
        );
        byDay[day] ??= [day];
        byDay[day].push(amendedLesson);
        return byDay;
      }, {});

      return Object.keys(byDay)
        .sort()
        .map((key) => byDay[key]);
    },
    gqlGetPatchData(item) {
      return { id: item.id, teachers: item.teachers };
    },
    changeSelection(selection) {
      this.$router.push({
        name: "chronos.amendLessonOvervievByTypeAndDate",
        params: {
          objId: selection.id,
          dateStart: this.dateStart,
          dateEnd: this.dateEnd,
        },
      });
    },
  },
  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>