import {ParticipantRole} from "@/types/event.model";
<template>
    <main class="container">
        <b-tabs type="is-boxed" v-if="event" v-model="activeTab">
            <b-tab-item>
                <template slot="header">
                    <b-icon icon="account-multiple" />
                    <span>{{ $t('Participants')}} <b-tag rounded> {{ participantStats.going }} </b-tag> </span>
                </template>
                <template>
                  <section v-if="participants && participants.total > 0">
                      <h2 class="title">{{ $t('Participants') }}</h2>
                      <ParticipationTable
                              :data="participants.elements"
                              :accept-participant="acceptParticipant"
                              :refuse-participant="refuseParticipant"
                              :showRole="true"
                              :total="participants.total"
                              :perPage="PARTICIPANTS_PER_PAGE"
                              @page-change="(page) => participantPage = page"
                      />
                  </section>
                </template>
            </b-tab-item>
            <b-tab-item :disabled="participantStats.notApproved === 0">
                <template slot="header">
                    <b-icon icon="account-multiple-plus" />
                    <span>{{ $t('Requests') }} <b-tag rounded> {{ participantStats.notApproved }} </b-tag> </span>
                </template>
                <template>
                  <section v-if="queue && queue.total > 0">
                      <h2 class="title">{{ $t('Waiting list') }}</h2>
                      <ParticipationTable
                              :data="queue.elements"
                              :accept-participant="acceptParticipant"
                              :refuse-participant="refuseParticipant"
                              :total="queue.total"
                              :perPage="PARTICIPANTS_PER_PAGE"
                              @page-change="(page) => queuePage = page"
                      />
                  </section>
                </template>
            </b-tab-item>
            <b-tab-item :disabled="participantStats.rejected === 0">
                <template slot="header">
                    <b-icon icon="account-multiple-minus"></b-icon>
                    <span>{{ $t('Rejected')}} <b-tag rounded> {{ participantStats.rejected }} </b-tag> </span>
                </template>
                <template>
                  <section v-if="rejected && rejected.total > 0">
                      <h2 class="title">{{ $t('Rejected participations') }}</h2>
                      <ParticipationTable
                              :data="rejected.elements"
                              :accept-participant="acceptParticipant"
                              :refuse-participant="refuseParticipant"
                              :total="rejected.total"
                              :perPage="PARTICIPANTS_PER_PAGE"
                              @page-change="(page) => rejectedPage = page"
                      />
                  </section>
                </template>
            </b-tab-item>
        </b-tabs>
    </main>
</template>

<script lang="ts">
import { Component, Prop, Vue, Watch } from 'vue-property-decorator';
import { IEvent, IEventParticipantStats, IParticipant, Participant, ParticipantRole } from '@/types/event.model';
import { PARTICIPANTS, UPDATE_PARTICIPANT } from '@/graphql/event';
import ParticipantCard from '@/components/Account/ParticipantCard.vue';
import { CURRENT_ACTOR_CLIENT } from '@/graphql/actor';
import { IPerson } from '@/types/actor';
import { CONFIG } from '@/graphql/config';
import { IConfig } from '@/types/config.model';
import ParticipationTable from '@/components/Event/ParticipationTable.vue';
import { Paginate } from '@/types/paginate';

const PARTICIPANTS_PER_PAGE = 20;
const MESSAGE_ELLIPSIS_LENGTH = 130;

@Component({
  components: {
    ParticipationTable,
    ParticipantCard,
  },
  apollo: {
    currentActor: {
      query: CURRENT_ACTOR_CLIENT,
    },
    config: CONFIG,
    event: {
      query: PARTICIPANTS,
      variables() {
        return {
          uuid: this.eventId,
          page: 1,
          limit: PARTICIPANTS_PER_PAGE,
          roles: [ParticipantRole.PARTICIPANT].join(),
          actorId: this.currentActor.id,
        };
      },
      skip() {
        return !this.currentActor.id;
      },
    },
    participants: {
      query: PARTICIPANTS,
      variables() {
        return {
          uuid: this.eventId,
          page: this.participantPage,
          limit: PARTICIPANTS_PER_PAGE,
          roles: [ParticipantRole.CREATOR, ParticipantRole.PARTICIPANT].join(),
          actorId: this.currentActor.id,
        };
      },
      update(data) { return this.dataTransform(data); },
      skip() {
        return !this.currentActor.id;
      },
    },
    queue: {
      query: PARTICIPANTS,
      variables() {
        return {
          uuid: this.eventId,
          page: this.queuePage,
          limit: PARTICIPANTS_PER_PAGE,
          roles: [ParticipantRole.NOT_APPROVED].join(),
          actorId: this.currentActor.id,
        };
      },
      update(data) { return this.dataTransform(data); },
      skip() {
        return !this.currentActor.id;
      },
    },
    rejected: {
      query: PARTICIPANTS,
      variables() {
        return {
          uuid: this.eventId,
          page: this.rejectedPage,
          limit: PARTICIPANTS_PER_PAGE,
          roles: [ParticipantRole.REJECTED].join(),
          actorId: this.currentActor.id,
        };
      },
      update(data) { return this.dataTransform(data); },
      skip() {
        return !this.currentActor.id;
      },
    },
  },
  filters: {
    ellipsize: (text?: string) => text && text.substr(0, MESSAGE_ELLIPSIS_LENGTH).concat('…'),
  },
})
export default class Participants extends Vue {
  @Prop({ required: true }) eventId!: string;
  page: number = 1;
  limit: number = 10;

  participants!: Paginate<IParticipant>;
  participantPage: number = 1;

  queue!: Paginate<IParticipant>;
  queuePage: number = 1;

  rejected!: Paginate<IParticipant>;
  rejectedPage: number = 1;

  event!: IEvent;
  config!: IConfig;

  ParticipantRole = ParticipantRole;
  currentActor!: IPerson;

  hasMoreParticipants: boolean = false;
  activeTab: number = 0;

  PARTICIPANTS_PER_PAGE = PARTICIPANTS_PER_PAGE;

  dataTransform(data): Paginate<Participant> {
    return {
      total: data.event.participants.total,
      elements: data.event.participants.elements.map(participation => new Participant(participation)),
    };
  }

  get participantStats(): IEventParticipantStats | null {
    if (!this.event) return null;
    return this.event.participantStats;
  }

  @Watch('participantStats', { deep: true })
  watchParticipantStats(stats: IEventParticipantStats) {
    if (!stats) return;
    if ((stats.notApproved === 0 && this.activeTab === 1) || stats.rejected === 0 && this.activeTab === 2 ) {
      this.activeTab = 0;
    }
  }

  loadMoreParticipants() {
    this.page += 1;
    this.$apollo.queries.participants.fetchMore({
      // New variables
      variables: {
        page: this.page,
        limit: this.limit,
      },
      // Transform the previous result with new data
      updateQuery: (previousResult, { fetchMoreResult }) => {
        const newParticipations = fetchMoreResult.event.participants;
        this.hasMoreParticipants = newParticipations.length === this.limit;

        return {
          loggedUser: {
            __typename: previousResult.event.__typename,
            participations: [...previousResult.event.participants, ...newParticipations],
          },
        };
      },
    });
  }

  async acceptParticipant(participant: IParticipant) {
    try {
      const { data } = await this.$apollo.mutate({
        mutation: UPDATE_PARTICIPANT,
        variables: {
          id: participant.id,
          moderatorActorId: this.currentActor.id,
          role: ParticipantRole.PARTICIPANT,
        },
      });
      if (data) {
        this.queue.elements = this.queue.elements.filter(participant => participant.id !== data.updateParticipation.id);
        this.rejected.elements = this.rejected.elements.filter(participant => participant.id !== data.updateParticipation.id);
        this.event.participantStats.going += 1;
        if (participant.role === ParticipantRole.NOT_APPROVED) {
          this.event.participantStats.notApproved -= 1;
        }
        if (participant.role === ParticipantRole.REJECTED) {
          this.event.participantStats.rejected -= 1;
        }
        participant.role = ParticipantRole.PARTICIPANT;
        this.event.participants.elements.push(participant);
      }
    } catch (e) {
      console.error(e);
    }
  }

  async refuseParticipant(participant: IParticipant) {
    try {
      const { data } = await this.$apollo.mutate({
        mutation: UPDATE_PARTICIPANT,
        variables: {
          id: participant.id,
          moderatorActorId: this.currentActor.id,
          role: ParticipantRole.REJECTED,
        },
      });
      if (data) {
        this.event.participants.elements = this.event.participants.elements.filter(
            participant => participant.id !== data.updateParticipation.id,
        );
        this.queue.elements = this.queue.elements.filter(participant => participant.id !== data.updateParticipation.id);
        this.event.participantStats.rejected += 1;
        if (participant.role === ParticipantRole.PARTICIPANT) {
          this.event.participantStats.participant -= 1;
          this.event.participantStats.going -= 1;
        }
        if (participant.role === ParticipantRole.NOT_APPROVED) {
          this.event.participantStats.notApproved -= 1;
        }
        participant.role = ParticipantRole.REJECTED;
        this.rejected.elements = this.rejected.elements.filter(participantIn => participantIn.id !== participant.id);
        this.rejected.elements.push(participant);
      }
    } catch (e) {
      console.error(e);
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style lang="scss" scoped>
    section {
        padding: 1rem 0;
    }
</style>
<style lang="scss">
  nav.tabs li {
    margin: 3rem 0 0;
  }

  .tab-content {
    background: #fff;
  }
</style>