<template lang='pug'>
  v-container(fluid, grid-list-lg)
    v-layout(row wrap)
      v-flex(xs12)
        .admin-header
          img.animated.fadeInUp(src='/_assets/svg/icon-triangle-arrow.svg', alt='Navigation', style='width: 80px;')
          .admin-header-title
            .headline.primary--text.animated.fadeInLeft {{$t('navigation.title')}}
            .subtitle-1.grey--text.animated.fadeInLeft.wait-p4s {{$t('navigation.subtitle')}}
          v-spacer
          v-btn.animated.fadeInDown.wait-p3s(icon, outlined, color='grey', href='https://docs.requarks.io/navigation', target='_blank')
            v-icon mdi-help-circle
          v-btn.mx-3.animated.fadeInDown.wait-p2s.mr-3(icon, outlined, color='grey', @click='refresh')
            v-icon mdi-refresh
          v-btn.animated.fadeInDown(color='success', depressed, @click='save', large)
            v-icon(left) mdi-check
            span {{$t('common:actions.apply')}}
        v-container.pa-0.mt-3(fluid, grid-list-lg)
          v-row(dense)
            v-col(cols='3')
              v-card.animated.fadeInUp
                v-toolbar(color='teal', dark, dense, flat, height='56')
                  v-toolbar-title.subtitle-1 {{$t('admin:navigation.mode')}}
                v-list(nav, two-line)
                  v-list-item-group(v-model='config.mode', mandatory, :color='$vuetify.theme.dark ? `teal lighten-3` : `teal`')
                    v-list-item(value='TREE')
                      v-list-item-avatar
                        img(src='/_assets/svg/icon-tree-structure-dotted.svg', alt='Site Tree')
                      v-list-item-content
                        v-list-item-title {{$t('admin:navigation.modeSiteTree.title')}}
                        v-list-item-subtitle {{$t('admin:navigation.modeSiteTree.description')}}
                      v-list-item-avatar
                        v-icon(v-if='$vuetify.theme.dark', :color='config.mode === `TREE` ? `teal lighten-3` : `grey darken-2`') mdi-check-circle
                        v-icon(v-else, :color='config.mode === `TREE` ? `teal` : `grey lighten-3`') mdi-check-circle
                    v-list-item(value='STATIC')
                      v-list-item-avatar
                        img(src='/_assets/svg/icon-features-list.svg', alt='Static Navigation')
                      v-list-item-content
                        v-list-item-title {{$t('admin:navigation.modeStatic.title')}}
                        v-list-item-subtitle {{$t('admin:navigation.modeStatic.description')}}
                      v-list-item-avatar
                        v-icon(v-if='$vuetify.theme.dark', :color='config.mode === `STATIC` ? `teal lighten-3` : `grey darken-2`') mdi-check-circle
                        v-icon(v-else, :color='config.mode === `STATIC` ? `teal` : `grey lighten-3`') mdi-check-circle
                    v-list-item(value='MIXED')
                      v-list-item-avatar
                        img(src='/_assets/svg/icon-user-menu-male-dotted.svg', alt='Custom Navigation')
                      v-list-item-content
                        v-list-item-title {{$t('admin:navigation.modeCustom.title')}}
                        v-list-item-subtitle {{$t('admin:navigation.modeCustom.description')}}
                      v-list-item-avatar
                        v-icon(v-if='$vuetify.theme.dark', :color='config.mode === `MIXED` ? `teal lighten-3` : `grey darken-2`') mdi-check-circle
                        v-icon(v-else, :color='config.mode === `MIXED` ? `teal` : `grey lighten-3`') mdi-check-circle
                    v-list-item(value='NONE')
                      v-list-item-avatar
                        img(src='/_assets/svg/icon-cancel-dotted.svg', alt='None')
                      v-list-item-content
                        v-list-item-title {{$t('admin:navigation.modeNone.title')}}
                        v-list-item-subtitle {{$t('admin:navigation.modeNone.description')}}
                      v-list-item-avatar
                        v-icon(v-if='$vuetify.theme.dark', :color='config.mode === `none` ? `teal lighten-3` : `grey darken-2`') mdi-check-circle
                        v-icon(v-else, :color='config.mode === `none` ? `teal` : `grey lighten-3`') mdi-check-circle
            v-col(cols='9', v-if='config.mode === `MIXED` || config.mode === `STATIC`')
              v-card.animated.fadeInUp.wait-p2s
                v-row(no-gutters, align='stretch')
                  v-col(style='flex: 0 0 350px;')
                    v-card.grey(flat, style='height: 100%; border-radius: 4px 0 0 4px;', :class='$vuetify.theme.dark ? `darken-4-l5` : `lighten-3`')
                      .teal.lighten-1.pa-2.d-flex(style='margin-bottom: 1px; height:56px;')
                        v-select(
                          :disabled='locales.length < 2'
                          label='Locale'
                          hide-details
                          solo
                          flat
                          background-color='teal darken-2'
                          dark
                          dense
                          v-model='currentLang'
                          :items='locales'
                          item-text='nativeName'
                          item-value='code'
                        )
                        v-tooltip(top)
                          template(v-slot:activator='{ on }')
                            v-btn.ml-2(icon, tile, color='white', v-on='on', @click='copyFromLocaleDialogIsShown = true')
                              v-icon mdi-arrange-send-backward
                          span {{$t('admin:navigation.copyFromLocale')}}
                      v-list.py-2(dense, nav, dark, class='blue darken-2', style='border-radius: 0;')
                        v-list-item(v-if='currentTree.length < 1')
                          v-list-item-avatar(size='24'): v-icon(color='blue lighten-3') mdi-alert
                          v-list-item-content
                            em.caption.blue--text.text--lighten-4 {{$t('navigation.emptyList')}}
                        draggable(v-model='currentTree')
                          template(v-for='navItem in currentTree')
                            v-list-item(
                              v-if='navItem.kind === "link"'
                              :key='navItem.id'
                              :class='(navItem === current) ? "blue" : ""'
                              @click='selectItem(navItem)'
                              )
                              v-list-item-avatar(size='24', tile)
                                v-icon(v-if='navItem.icon.match(/fa[a-z] fa-/)', size='19') {{ navItem.icon }}
                                v-icon(v-else) {{ navItem.icon }}
                              v-list-item-title {{navItem.label}}
                            .py-2.clickable(
                              v-else-if='navItem.kind === "divider"'
                              :key='navItem.id'
                              :class='(navItem === current) ? "blue" : ""'
                              @click='selectItem(navItem)'
                              )
                              v-divider
                            v-subheader.pl-4.clickable(
                              v-else-if='navItem.kind === "header"'
                              :key='navItem.id'
                              :class='(navItem === current) ? "blue" : ""'
                              @click='selectItem(navItem)'
                              ) {{navItem.label}}
                      v-card-chin
                        v-menu(offset-y, bottom, min-width='200px', style='flex: 1 1;')
                          template(v-slot:activator='{ on }')
                            v-btn(v-on='on', color='primary', depressed, block)
                              v-icon(left) mdi-plus
                              span {{$t('common:actions.add')}}
                          v-list
                            v-list-item(@click='addItem("link")')
                              v-list-item-avatar(size='24'): v-icon mdi-link
                              v-list-item-title {{$t('navigation.link')}}
                            v-list-item(@click='addItem("header")')
                              v-list-item-avatar(size='24'): v-icon mdi-format-title
                              v-list-item-title {{$t('navigation.header')}}
                            v-list-item(@click='addItem("divider")')
                              v-list-item-avatar(size='24'): v-icon mdi-minus
                              v-list-item-title {{$t('navigation.divider')}}
                  v-col
                    v-card(flat, style='border-radius: 0 4px 4px 0;')
                      template(v-if='current.kind === "link"')
                        v-toolbar(height='56', color='teal lighten-1', flat, dark)
                          .subtitle-1 {{$t('navigation.edit', { kind: $t('navigation.link') })}}
                          v-spacer
                          v-btn.px-5(color='white', outlined, @click='deleteItem(current)')
                            v-icon(left) mdi-delete
                            span {{$t('navigation.delete', { kind: $t('navigation.link') })}}
                        v-card-text
                          v-text-field(
                            outlined
                            :label='$t("navigation.label")'
                            prepend-icon='mdi-format-title'
                            v-model='current.label'
                            counter='255'
                          )
                          v-text-field(
                            outlined
                            :label='$t("navigation.icon")'
                            prepend-icon='mdi-dice-5'
                            v-model='current.icon'
                            hide-details
                          )
                          .caption.pt-3.pl-5 The default icon set is #[strong Material Design Icons]. In order to use another icon set, you must first select it in the Theme administration section.
                          .caption.pt-3.pl-5: strong Material Design Icons
                          .caption.pl-5 Refer to the #[a(href='https://pictogrammers.com/library/mdi/', target='_blank') Material Design Icon Library] for the list of all possible values. You must prefix all values with #[code mdi-], e.g. #[code mdi-home]
                          .caption.pt-3.pl-5: strong Font Awesome 5
                          .caption.pl-5 Refer to the #[a(href='https://fontawesome.com/icons?d=gallery&m=free', target='_blank') Font Awesome 5 Reference] for the list of all possible values. You must prefix all values with #[code fas fa-], e.g. #[code fas fa-home]. Note that some icons use different prefixes (e.g. #[code fab], #[code fad], #[code fal], #[code far]).
                          .caption.pt-3.pl-5: strong Font Awesome 4
                          .caption.pl-5 Refer to the #[a(href='https://fontawesome.com/v4.7.0/icons/', target='_blank') Font Awesome 4 Reference] for the list of all possible values. You must prefix all values with #[code fa fa-], e.g. #[code fa fa-home]
                        v-divider
                        v-card-text
                          v-select(
                            outlined
                            :label='$t("navigation.targetType")'
                            prepend-icon='mdi-near-me'
                            :items='navTypes'
                            v-model='current.targetType'
                            hide-details
                          )
                          v-text-field.mt-4(
                            v-if='current.targetType === `external` || current.targetType === `externalblank`'
                            outlined
                            :label='$t("navigation.target")'
                            prepend-icon='mdi-near-me'
                            v-model='current.target'
                            hide-details
                          )
                          .d-flex.align-center.mt-4(v-else-if='current.targetType === "page"')
                            v-btn.ml-8(
                              color='primary'
                              dark
                              @click='selectPage'
                              )
                              v-icon(left) mdi-magnify
                              span {{$t('admin:navigation.selectPageButton')}}
                            .caption.ml-4.primary--text {{current.target}}
                          v-text-field(
                            v-else-if='current.targetType === `search`'
                            outlined
                            :label='$t("navigation.navType.searchQuery")'
                            prepend-icon='search'
                            v-model='current.target'
                          )
                        v-divider

                      template(v-else-if='current.kind === "header"')
                        v-toolbar(height='56', color='teal lighten-1', flat, dark)
                          .subtitle-1 {{$t('navigation.edit', { kind: $t('navigation.header') })}}
                          v-spacer
                          v-btn.px-5(color='white', outlined, @click='deleteItem(current)')
                            v-icon(left) mdi-delete
                            span {{$t('navigation.delete', { kind: $t('navigation.header') })}}
                        v-card-text
                          v-text-field(
                            outlined
                            :label='$t("navigation.label")'
                            prepend-icon='mdi-format-title'
                            v-model='current.label'
                          )
                        v-divider

                      div(v-else-if='current.kind === "divider"')
                        v-toolbar(height='56', color='teal lighten-1', flat, dark)
                          .subtitle-1 {{$t('navigation.edit', { kind: $t('navigation.divider') })}}
                          v-spacer
                          v-btn.px-5(color='white', outlined, @click='deleteItem(current)')
                            v-icon(left) mdi-delete
                            span {{$t('navigation.delete', { kind: $t('navigation.divider') })}}

                      v-card-text(v-if='current.kind')
                        v-radio-group.pl-8(v-model='current.visibilityMode', mandatory, hide-details)
                          v-radio(:label='$t("admin:navigation.visibilityMode.all")', value='all', color='primary')
                          v-radio.mt-3(:label='$t("admin:navigation.visibilityMode.restricted")', value='restricted', color='primary')
                        .pl-8
                          v-select.pl-8.mt-3(
                            item-text='name'
                            item-value='id'
                            outlined
                            prepend-icon='mdi-account-group'
                            label='Groups'
                            :disabled='current.visibilityMode !== `restricted`'
                            v-model='current.visibilityGroups'
                            :items='groups'
                            persistent-hint
                            clearable
                            multiple
                          )
                      template(v-else)
                        v-toolbar(height='56', color='teal lighten-1', flat, dark)
                        v-card-text.grey--text(v-if='currentTree.length > 0') {{$t('navigation.noSelectionText')}}
                        v-card-text.grey--text(v-else) {{$t('navigation.noItemsText')}}

    v-dialog(v-model='copyFromLocaleDialogIsShown', max-width='650', persistent)
      v-card
        .dialog-header.is-short.is-teal
          v-icon.mr-3(color='white') mdi-arrange-send-backward
          span {{$t('admin:navigation.copyFromLocale')}}
        v-card-text.pt-5
          .body-2 {{$t('admin:navigation.copyFromLocaleInfoText')}}
          v-select.mt-3(
            :items='locales'
            item-text='nativeName'
            item-value='code'
            outlined
            prepend-icon='mdi-web'
            v-model='copyFromLocaleCode'
            :label='$t(`admin:navigation.sourceLocale`)'
            :hint='$t(`admin:navigation.sourceLocaleHint`)'
            persistent-hint
            )
        v-card-chin
          v-spacer
          v-btn(text, @click='copyFromLocaleDialogIsShown = false') {{$t('common:actions.cancel')}}
          v-btn.px-3(depressed, color='primary', @click='copyFromLocale')
            v-icon(left) mdi-chevron-right
            span {{$t('common:actions.copy')}}

    page-selector(mode='select', v-model='selectPageModal', :open-handler='selectPageHandle', path='home', :locale='currentLang')
</template>

<script>
import _ from 'lodash'
import gql from 'graphql-tag'
import { v4 as uuid } from 'uuid'

import groupsQuery from 'gql/admin/users/users-query-groups.gql'

import draggable from 'vuedraggable'

/* global siteConfig, siteLangs */

export default {
  components: {
    draggable
  },
  data() {
    return {
      selectPageModal: false,
      trees: [],
      current: {},
      currentLang: siteConfig.lang,
      groups: [],
      copyFromLocaleDialogIsShown: false,
      config: {
        mode: 'NONE'
      },
      allLocales: [],
      copyFromLocaleCode: 'en'
    }
  },
  computed: {
    navTypes () {
      return [
        { text: this.$t('navigation.navType.external'), value: 'external' },
        { text: this.$t('navigation.navType.externalblank'), value: 'externalblank' },
        { text: this.$t('navigation.navType.home'), value: 'home' },
        { text: this.$t('navigation.navType.page'), value: 'page' }
        // { text: this.$t('navigation.navType.searchQuery'), value: 'search' }
      ]
    },
    locales () {
      return _.intersectionBy(this.allLocales, _.unionBy(siteLangs, [{ code: 'en' }, { code: siteConfig.lang }], 'code'), 'code')
    },
    currentTree: {
      get () {
        return _.get(_.find(this.trees, ['locale', this.currentLang]), 'items', null) || []
      },
      set (val) {
        const tree = _.find(this.trees, ['locale', this.currentLang])
        if (tree) {
          tree.items = val
        } else {
          this.trees = [...this.trees, {
            locale: this.currentLang,
            items: val
          }]
        }
      }
    }
  },
  watch: {
    currentLang (newValue, oldValue) {
      this.$nextTick(() => {
        if (this.currentTree.length > 0) {
          this.current = this.currentTree[0]
        } else {
          this.current = {}
        }
      })
    }
  },
  methods: {
    addItem(kind) {
      let newItem = {
        id: uuid(),
        kind,
        visibilityMode: 'all',
        visibilityGroups: []
      }
      switch (kind) {
        case 'link':
          newItem = {
            ...newItem,
            label: this.$t('navigation.untitled', { kind: this.$t(`navigation.link`) }),
            icon: 'mdi-chevron-right',
            targetType: 'home',
            target: ''
          }
          break
        case 'header':
          newItem.label = this.$t('navigation.untitled', { kind: this.$t(`navigation.header`) })
          break
      }
      this.currentTree = [...this.currentTree, newItem]
      this.current = newItem
    },
    deleteItem(item) {
      this.currentTree = _.pull(this.currentTree, item)
      this.current = {}
    },
    selectItem(item) {
      this.current = item
    },
    selectPage() {
      this.selectPageModal = true
    },
    selectPageHandle ({ path, locale }) {
      this.current.target = `/${locale}/${path}`
    },
    copyFromLocale () {
      this.copyFromLocaleDialogIsShown = false
      this.currentTree = [...this.currentTree, ..._.get(_.find(this.trees, ['locale', this.copyFromLocaleCode]), 'items', null) || []]
    },
    async save() {
      this.$store.commit(`loadingStart`, 'admin-navigation-save')
      try {
        const resp = await this.$apollo.mutate({
          mutation: gql`
            mutation ($tree: [NavigationTreeInput]!, $mode: NavigationMode!) {
              navigation{
                updateTree(tree: $tree) {
                  responseResult {
                    succeeded
                    errorCode
                    slug
                    message
                  }
                },
                updateConfig(mode: $mode) {
                  responseResult {
                    succeeded
                    errorCode
                    slug
                    message
                  }
                }
              }
            }
          `,
          variables: {
            tree: this.trees,
            mode: this.config.mode
          }
        })
        if (_.get(resp, 'data.navigation.updateTree.responseResult.succeeded', false) && _.get(resp, 'data.navigation.updateConfig.responseResult.succeeded', false)) {
          this.$store.commit('showNotification', {
            message: this.$t('navigation.saveSuccess'),
            style: 'success',
            icon: 'check'
          })
        } else {
          throw new Error(_.get(resp, 'data.navigation.updateTree.responseResult.message', 'An unexpected error occurred.'))
        }
      } catch (err) {
        this.$store.commit('pushGraphError', err)
      }
      this.$store.commit(`loadingStop`, 'admin-navigation-save')
    },
    async refresh() {
      await this.$apollo.queries.trees.refetch()
      this.current = {}
      this.$store.commit('showNotification', {
        message: 'Navigation has been refreshed.',
        style: 'success',
        icon: 'cached'
      })
    }
  },
  apollo: {
    config: {
      query: gql`
        {
          navigation {
            config {
              mode
            }
          }
        }
      `,
      fetchPolicy: 'network-only',
      update: (data) => _.cloneDeep(data.navigation.config),
      watchLoading (isLoading) {
        this.$store.commit(`loading${isLoading ? 'Start' : 'Stop'}`, 'admin-navigation-config')
      }
    },
    trees: {
      query: gql`
        {
          navigation {
            tree {
              locale
              items {
                id
                kind
                label
                icon
                targetType
                target
                visibilityMode
                visibilityGroups
              }
            }
          }
        }
      `,
      fetchPolicy: 'network-only',
      update: (data) => _.cloneDeep(data.navigation.tree),
      watchLoading (isLoading) {
        this.$store.commit(`loading${isLoading ? 'Start' : 'Stop'}`, 'admin-navigation-tree')
      }
    },
    groups: {
      query: groupsQuery,
      fetchPolicy: 'network-only',
      update: (data) => data.groups.list,
      watchLoading (isLoading) {
        this.$store.commit(`loading${isLoading ? 'Start' : 'Stop'}`, 'admin-navigation-groups')
      }
    },
    allLocales: {
      query: gql`
        {
          localization {
            locales {
              code
              name
              nativeName
            }
          }
        }
      `,
      fetchPolicy: 'network-only',
      update: (data) => data.localization.locales,
      watchLoading (isLoading) {
        this.$store.commit(`loading${isLoading ? 'Start' : 'Stop'}`, 'admin-navigation-locales')
      }
    }
  }
}
</script>

<style lang='scss' scoped>

.clickable {
  cursor: pointer;

  &:hover {
    background-color: rgba(mc('blue', '500'), .25);
  }
}

</style>
