<script setup>

import { useI18n } from 'vue-i18n';
const i18n = useI18n();
const t = i18n.t;

import { ref, onMounted, useTemplateRef, inject, computed } from 'vue';
import { Button, TableView, Dialog, Checkbox, TextInput, Menu } from '@cloudron/pankow';
import { prettyDecimalSize } from '@cloudron/pankow/utils';
import { eachLimit } from 'async';
import Section from '../components/Section.vue';
import MailboxDialog from '../components/MailboxDialog.vue';
import AppsModel from '../models/AppsModel.js';
import MailModel from '../models/MailModel.js';
import GroupsModel from '../models/GroupsModel.js';
import UsersModel from '../models/UsersModel.js';
import MailboxesModel from '../models/MailboxesModel.js';

const appsModel = AppsModel.create();
const mailModel = MailModel.create();
const groupsModel = GroupsModel.create();
const mailboxesModel = MailboxesModel.create();
const usersModel = UsersModel.create();

const columns = {
  fullName: {
    label: t('email.incoming.mailboxes.name'),
    sort: true,
    nowrap: true,
  },
  ownerDisplayName: {
    label: t('email.incoming.mailboxes.owner'),
    sort: true,
    hideMobile: true,
    nowrap: true,
  },
  aliases: {
    label: t('email.incoming.mailboxes.aliases'),
    sort: true,
    hideMobile: true,
    nowrap: true,
    width: '100px',
  },
  usage: {
    label: t('email.incoming.mailboxes.usage'),
    sort: (a, b) => {
      if (!a.diskSize) return -1;
      if (!b.diskSize) return 1;
      return a.diskSize - b.diskSize;
    },
    hideMobile: true,
    width: '100px',
  },
  storageQuota: {
    label: 'Quota',
    sort: true,
    hideMobile: true,
    width: '100px',
  },
  actions: {
    width: '55px',
  }
};

const actionMenuModel = ref([]);
const actionMenuElement = useTemplateRef('actionMenuElement');
function onActionMenu(mailbox, event) {
  actionMenuModel.value = [{
    icon: 'fa-solid fa-pencil-alt',
    label: t('main.action.edit'),
    action: onAddOrEdit.bind(null, mailbox),
  }, {
    separator: true,
  }, {
    icon: 'fa-solid fa-trash-alt',
    label: t('main.action.remove'),
    action: onRemove.bind(null, mailbox),
  }];

  actionMenuElement.value.open(event, event.currentTarget);
}

const busy = ref(true);
const mailboxes = ref([]);
const mailboxesUsage = ref(0);
const domains = ref([]);
const apps = ref([]);
const users = ref([]);
const groups = ref([]);
const searchFilter = ref('');

const features = inject('features');
const subscriptionRequiredDialog = inject('subscriptionRequiredDialog');

const filteredMailboxes = computed(() => {
  if (!searchFilter.value) return mailboxes.value;

  return mailboxes.value.filter(m => {
    const search = searchFilter.value.toLowerCase();

    if (m.fullName.toLowerCase().indexOf(search) !== -1) return true;
    if (m.ownerId.indexOf(search) !== -1) return true;
    if (m.ownerDisplayName.indexOf(search) !== -1) return true;
    if (m.aliases.find(a => a.domain.toLowerCase().indexOf(search) !== -1 || a.name.toLowerCase().indexOf(search) !== -1)) return true;

    return false;
  });
});

const filteredMailboxesUsage = computed(() => {
  return filteredMailboxes.value.reduce((acc, m) => acc + (cachedMailboxUsage.value[m.fullName] && cachedMailboxUsage.value[m.fullName].diskSize), 0);
});

const mailboxDialog = useTemplateRef('mailboxDialog');

async function onAddOrEdit(mailbox = null) {
  if (mailbox || features.value.mailboxMaxCount > mailboxes.value.length) mailboxDialog.value.open(mailbox);
  else subscriptionRequiredDialog.value.open();
}

const removeDialog = useTemplateRef('removeDialog');
const removeBusy = ref(false);
const removeError = ref('');
const removePurge = ref(false);
const removeMailbox = ref({});

function onRemove(mailbox) {
  removeBusy.value = false;
  removePurge.value = false;
  removeError.value = '';
  removeMailbox.value = mailbox;

  removeDialog.value.open();
}

async function onSubmitRemove() {
  removeBusy.value = true;
  removeError.value = '';

  const [error] = await mailboxesModel.remove(removeMailbox.value.domain, removeMailbox.value.name, removePurge.value);
  if (error) {
    removeBusy.value = false;
    removeError.value = error.body ? error.body.message : 'Internal error';
    return console.error(error);
  }

  const idx = mailboxes.value.findIndex(mbox => mbox.fullName === removeMailbox.value.fullName);
  if (idx !== -1) mailboxes.value.splice(idx, 1);

  removeDialog.value.close();

  removeBusy.value = false;
}

const cachedMailboxUsage = ref({});

async function refreshDomainUsage(domain) {
  const [error, usage] = await mailModel.usage(domain);
  // retry if mail addon cannot be reached during restarts
  if (error && error.status === 424) return setTimeout(refresh, 2000);
  else if (error) return console.error(error);

  mailboxes.value.forEach((m) => {
    if (usage[m.fullName]) cachedMailboxUsage.value[m.fullName] = usage[m.fullName];
  });

  mailboxesUsage.value = mailboxes.value.reduce((acc, m) => acc + (cachedMailboxUsage.value[m.fullName] && cachedMailboxUsage.value[m.fullName].diskSize), 0);
}

async function refreshUsage() {
  try {
    await eachLimit(domains.value.map(d => d.domain), 10, refreshDomainUsage);
  } catch (error) {
    return console.error(error);
  }
}

async function refreshDomain(domain) {
  const [error, result] = await mailboxesModel.list(domain);
  if (error) throw error;

  result.forEach((m) => {
    m.fullName = m.name + '@' + m.domain;

    m.owner = users.value.find(u => u.id === m.ownerId) || null;
    if (!m.owner) m.owner = groups.value.find(g => g.id === m.ownerId) || null;

    m.ownerDisplayName = m.owner ? (m.owner.username || m.owner.name) : '';
    cachedMailboxUsage.value[m.fullName] = cachedMailboxUsage.value[m.fullName] || { diskSize: 0 };

    // update in-place or add
    const idx = mailboxes.value.findIndex(mbox => mbox.fullName === m.fullName);
    if (idx !== -1) mailboxes.value[idx] = m;
    else mailboxes.value.push(m);
  });
}

async function refresh() {
  try {
    await eachLimit(domains.value.map(d => d.domain), 10, refreshDomain);
  } catch (error) {
    return console.error(error);
  }
}

async function onMailboxDialogSuccess(mailbox) {
  await refreshDomain(mailbox.domain);
  await refreshDomainUsage(mailbox.domain);
}

onMounted(async () => {
  busy.value = true;

  let [error, result] = await mailModel.list();
  if (error) return console.error(error);
  domains.value = result;

  [error, result] = await appsModel.list();
  if (error) return console.error(error);
  apps.value = result.filter(a => !!a.manifest?.addons?.recvmail);

  [error, result] = await usersModel.list();
  if (error) return console.error(error);
  users.value = result;

  [error, result] = await groupsModel.list();
  if (error) return console.error(error);
  groups.value = result;

  await refresh();

  // we do this in the background to show the list faster
  refreshUsage();

  busy.value = false;
});

</script>

<template>
  <div class="content">
    <Menu ref="actionMenuElement" :model="actionMenuModel" />
    <Dialog ref="removeDialog"
      :title="$t('email.deleteMailboxDialog.title')"
      :confirm-label="$t('email.deleteMailboxDialog.deleteAction')"
      :confirm-busy="removeBusy"
      :confirm-active="!removeBusy"
       confirm-style="danger"
      :reject-label="$t('main.dialog.cancel')"
      :reject-active="!removeBusy"
       reject-style="secondary"
      @confirm="onSubmitRemove()"
    >
      <div>
        <div class="text-danger" v-if="removeError">{{ removeError }}</div>
        <div v-html="$t('email.deleteMailboxDialog.description', { name: removeMailbox.name, domain: removeMailbox.domain })"></div>
        <br/>
        <Checkbox v-model="removePurge" :label="$t('email.deleteMailboxDialog.purgeMailboxCheckbox')" />
      </div>
    </Dialog>

    <MailboxDialog ref="mailboxDialog" :apps="apps" :users="users" :groups="groups" :domains="domains" @success="onMailboxDialogSuccess"/>

    <Section :title="$t('email.incoming.mailboxes.title')">
      <template #header-title-extra>
        <span style="font-weight: normal; font-size: 14px">({{ $t('email.incoming.mailboxes.stats', { mailboxCount: busy ? '-' : filteredMailboxes.length, usage: busy ? '-' : prettyDecimalSize(filteredMailboxesUsage) }) }})</span>
      </template>
      <template #header-buttons>
        <TextInput :placeholder="$t('main.searchPlaceholder')" style="flex-grow: 1;" v-model="searchFilter"/>
        <Button @click="onAddOrEdit()">{{ $t('email.incoming.mailboxes.addAction') }}</Button>
      </template>

      <TableView :columns="columns" :model="filteredMailboxes" :busy="busy" :fixed-layout="true" :placeholder="$t(searchFilter ? 'email.incoming.mailboxes.noMatchesPlaceholder' : 'email.incoming.mailboxes.emptyPlaceholder')">
        <template #aliases="mailbox">{{ mailbox.aliases.length }}</template>
        <template #usage="mailbox">
          <span v-if="cachedMailboxUsage[mailbox.fullName]">{{ prettyDecimalSize(cachedMailboxUsage[mailbox.fullName].diskSize) }}</span>
          <span v-else>{{ $t('main.loadingPlaceholder') }} ...</span>
        </template>
        <template #storageQuota="mailbox">
          <span v-if="cachedMailboxUsage[mailbox.fullName] && typeof cachedMailboxUsage[mailbox.fullName].quotaLimit !== 'undefined'">{{ prettyDecimalSize(cachedMailboxUsage[mailbox.fullName].quotaLimit) }}</span>
          <span v-else>-</span>
        </template>
        <template #actions="mailbox">
          <div style="text-align: right;">
            <Button tool plain secondary @click.capture="onActionMenu(mailbox, $event)" icon="fa-solid fa-ellipsis" />
          </div>
        </template>
      </TableView>

    </Section>
  </div>
</template>
