<!--

 This file is part of the Meeds project (https://meeds.io/).

 Copyright (C) 2020 - 2023 Meeds Association contact@meeds.io

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 3 of the License, or (at your option) any later version.
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this program; if not, write to the Free Software Foundation,
 Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

-->
<template>
  <exo-drawer
    ref="drawer"
    v-model="drawer"
    :right="!$vuetify.rtl"
    :allow-expand="!$root.isMobile"
    :loading="loading || saving"
    :confirm-close="modified"
    :confirm-close-labels="confirmCloseLabels"
    class="linkSettingDrawer"
    eager
    @opened="stepper = 1"
    @closed="reset"
    @expand-updated="expanded = $event">
    <template slot="title">
      {{ $t('links.drawer.title') }}
    </template>
    <template v-if="settings" #content>
      <v-stepper
        v-model="stepper"
        :class="expanded && 'flex-row' || 'flex-column'"
        class="ma-0 pa-4 d-flex"
        vertical
        flat>
        <div
          :class="{
            'col-6': expanded,
            'flex-grow-1': expanded || stepper === 1,
            'flex-grow-0': !expanded && stepper !== 1,
          }"
          class="flex-shrink-0">
          <v-stepper-step
            :step="1"
            :editable="!expanded"
            width="100%"
            class="ma-0 pa-0 position-relative">
            <div class="d-flex">
              <div class="d-flex align-center flex-grow-1 flex-shrink-1 text-truncate text-header">
                {{ $t('links.label.addLinks') }}
              </div>
              <v-btn
                v-if="(stepper === 1 || expanded) && hasLinks"
                :title="$t('links.label.addLinks')"
                :class="{
                  'r-0': !$vuetify.rtl,
                  'l-0': $vuetify.rtl,
                }"
                class="position-absolute t-0 mt-n1"
                icon
                @click="$root.$emit('links-form-drawer')">
                <v-icon size="20">fa-plus</v-icon>
              </v-btn>
            </div>
          </v-stepper-step>
          <v-slide-y-transition>
            <div v-show="expanded || stepper === 1">
              <div v-if="hasLinks" class="d-flex flex-column mt-8">
                <v-scroll-y-transition
                  v-for="(link, index) in links"
                  :key="`${link.id}-${link.url}-${index}`"
                  hide-on-leave>
                  <div
                    :key="`${link.id}-${link.url}-${index}`"
                    class="mb-2">
                    <links-input
                      :link="link"
                      :first="index === 0"
                      :last="index === (links.length - 1)"
                      @move-top="moveTop(index)"
                      @move-down="moveDown(index)"
                      @edit="edit(link, index)"
                      @remove="remove(index)" />
                  </div>
                </v-scroll-y-transition>
              </div>
              <div v-else class="d-flex flex-grow-1 full-height full-width align-center justify-center">
                <v-btn
                  :title="$t('links.label.addLinksButton')"
                  outlined
                  border
                  class="flex-grow-0 flex-shrink-0 mx-auto my-8 primary"
                  @click="$root.$emit('links-form-drawer')">
                  {{ $t('links.label.add') }}
                </v-btn>
              </div>
            </div>
          </v-slide-y-transition>
        </div>
        <div
          :class="{
            'col-6': expanded,
            'mt-8': !expanded && stepper < 2,
            'mt-4': !expanded && stepper === 2,
          }"
          class="flex-grow-0 flex-shrink-0">
          <v-stepper-step
            :step="2"
            :editable="!expanded && !disabledSecondStep"
            class="ma-0 pa-0 position-relative">
            <div class="d-flex align-center flex-grow-1 flex-shrink-1 text-truncate text-header">
              {{ $t('links.label.configureDisplay') }}
            </div>
          </v-stepper-step>
          <v-slide-y-transition>
            <div v-show="expanded || stepper > 1" class="mt-4">
              <div class="d-flex flex-column">
                <v-form
                  ref="form"
                  autocomplete="off">
                  <div class="d-flex flex-column">
                    <select
                      id="linkSettingDisplayType"
                      v-model="settings.type"
                      class="flex-grow-1 ignore-vuetify-classes py-2 mb-4 height-auto width-auto text-truncate">
                      <option
                        v-for="item in displayTypes"
                        :key="item.value"
                        :value="item.value">
                        {{ item.label }}
                      </option>
                    </select>
                    <links-display-preview
                      :settings="settings"
                      :links="links"
                      class="pa-4 mb-4" />
                    <div class="mb-2">
                      <div class="d-flex mb-2">
                        <div class="d-flex align-center flex-grow-1 flex-shrink-1 text-truncate text-color">
                          {{ $t('links.label.addHeader') }}
                        </div>
                        <v-switch
                          v-model="showHeader"
                          class="my-0 me-n2"
                          dense
                          hide-details />
                      </div>
                      <div v-if="showHeader && settings?.header" class="d-flex mb-2">
                        <translation-text-field
                          ref="linksHeader"
                          id="linksHeader"
                          v-model="settings.header"
                          :rules="rules.header"
                          :placeholder="$t('links.label.headerPlaceHolder')"
                          :maxlength="maxHeaderLength"
                          drawer-title="links.label.headerTranslation"
                          class="width-auto flex-grow-1"
                          no-expand-icon
                          autofocus
                          back-icon
                          required />
                      </div>
                    </div>
                    <div class="d-flex mb-4">
                      <div class="d-flex align-center flex-grow-1 flex-shrink-1 text-truncate text-color">
                        {{ $t('links.label.largeIcons') }}
                      </div>
                      <v-switch
                        v-model="settings.largeIcon"
                        class="my-0 me-n2"
                        dense
                        hide-details />
                    </div>
                    <div class="d-flex mb-4">
                      <div class="d-flex align-center flex-grow-1 flex-shrink-1 text-truncate text-color">
                        {{ $t('links.label.showName') }}
                      </div>
                      <v-switch
                        v-model="settings.showName"
                        class="my-0 me-n2"
                        dense
                        hide-details />
                    </div>
                    <div
                      v-if="settings?.type === 'COLUMN'"
                      class="d-flex mb-4">
                      <div class="d-flex align-center flex-grow-1 flex-shrink-1 text-truncate text-color">
                        {{ $t('links.label.showDescription') }}
                      </div>
                      <v-switch
                        v-model="settings.showDescription"
                        class="my-0 me-n2"
                        dense
                        hide-details />
                    </div>
                    <div class="mb-2">
                      <div class="d-flex mb-2">
                        <div class="d-flex align-center flex-grow-1 flex-shrink-1 text-truncate text-color">
                          {{ $t('links.label.addSeeMore') }}
                        </div>
                        <v-switch
                          v-model="seeMore"
                          class="my-0 me-n2"
                          dense
                          hide-details />
                      </div>
                      <div v-if="seeMore" class="mb-2">
                        <v-text-field
                          id="seeMoreInput"
                          name="seeMoreInput"
                          ref="seeMoreInput"
                          v-model="settings.seeMore"
                          :placeholder="$t('links.label.enterUrl')"
                          :rules="rules.seeMore"
                          class="border-box-sizing width-auto pt-0"
                          type="text"
                          outlined
                          dense />
                      </div>
                    </div>
                  </div>
                </v-form>
              </div>
            </div>
          </v-slide-y-transition>
        </div>
      </v-stepper>

      <links-form-drawer
        @link-add="addLink"
        @link-edit="editLink" />
    </template>
    <template #footer>
      <div class="d-flex align-center">
        <v-btn
          v-if="!expanded && stepper > 1"
          :title="$t('links.label.previous')"
          :disabled="saving"
          class="btn me-2 hidden-xs-only"
          @click="stepper--">
          {{ $t('links.label.previous') }}
        </v-btn>
        <v-btn
          :title="$t('links.label.cancel')"
          class="btn ms-auto me-2"
          @click="close()">
          {{ $t('links.label.cancel') }}
        </v-btn>
        <v-btn
          v-if="!expanded && stepper === 1"
          :disabled="disabledSecondStep"
          :loading="saving"
          class="btn primary"
          @click="stepper++">
          {{ $t('links.label.next') }}
        </v-btn>
        <v-btn
          v-else-if="expanded || stepper > 1"
          :disabled="disabled"
          :loading="saving"
          class="btn primary"
          @click="save()">
          {{ $t('links.label.confirm') }}
        </v-btn>
      </div>
    </template>
  </exo-drawer>
</template>
<script>
export default {
  data: () => ({
    settings: null,
    originalSettings: null,
    links: null,
    loading: false,
    saving: false,
    drawer: false,
    expanded: false,
    stepper: 1,
    showHeader: false,
    seeMore: false,
    valid: false,
    maxHeaderLength: 50,
    settingsHeader: null,
  }),
  computed: {
    displayTypes() {
      return [{
        value: 'ROW',
        label: this.$t('links.label.configureDisplay.row'),
      }, {
        value: 'COLUMN',
        label: this.$t('links.label.configureDisplay.column'),
      }, {
        value: 'CARD',
        label: this.$t('links.label.configureDisplay.cards'),
      }];
    },
    hasLinks() {
      return this.links?.length;
    },
    hadLinks() {
      return this.originalSettings?.links?.length;
    },
    disabledSecondStep() {
      return !this.hasLinks && !this.hadLinks;
    },
    modified() {
      return this.originalSettings && JSON.stringify(this.originalSettings) !== JSON.stringify(this.settings && {...this.settings, links: this.links} || {});
    },
    disabled() {
      return !this.valid || !this.modified || (this.showHeader && !this.settings?.header?.[this.$root.defaultLanguage]?.length);
    },
    confirmCloseLabels() {
      return {
        title: this.$t('links.title.confirmCloseModification'),
        message: this.$t('links.message.confirmCloseModification'),
        ok: this.$t('confirm.yes'),
        cancel: this.$t('confirm.no'),
      };
    },
    rules() {
      return {
        header: [
          v => !!v?.length || ' ',
          v => (v && v.length < this.maxHeaderLength) || this.$t('links.input.exceedsMaxLength', {
            0: this.maxHeaderLength,
          }),
        ],
        seeMore: [
          v => !!v?.length || ' ',
          v => {
            try {
              return !!this.$linkService.toLinkUrl(v)?.length || this.$t('links.input.invalidLink');
            } catch (e) {
              return this.$t('links.input.invalidLink');
            }
          },
        ],
      };
    },
  },
  watch: {
    showHeader() {
      if (this.loading) {
        return;
      }
      if (this.showHeader) {
        if (!this.settings.header?.[this.$root.defaultLanguage]) {
          this.settings.header = this.settingsHeader || {};
          if (!this.settingsHeader) {
            this.settings.header[this.$root.defaultLanguage] = '';
          }
          this.settingsHeader = null;
        }
      } else {
        this.settingsHeader = this.settings.header;
        this.settings.header = null;
      }
      this.refreshValidation();
    },
    seeMore() {
      if (!this.seeMore) {
        this.settings.seeMore = null;
      }
      this.refreshValidation();
    },
    settings: {
      deep: true,
      handler() {
        this.refreshValidation();
      },
    },
    expanded() {
      if (this.expanded) {
        this.stepper = 2;
      } else {
        this.stepper = 1;
      }
    }
  },
  created() {
    this.$root.$on('links-settings-drawer', this.open);
  },
  beforeDestroy() {
    this.$root.$off('links-settings-drawer', this.open);
  },
  mounted() {
    document.querySelector('#vuetify-apps').appendChild(this.$el);
  },
  methods: {
    open(openForm) {
      this.reset();
      this.loading = true;
      this.$nextTick().then(() => this.$refs?.drawer?.open?.());
      this.$linkService.getSettings(this.$root.name)
        .then(settings => {
          this.settings = settings;
          this.links = settings?.links || [];
          this.links.forEach(link => {
            if (!link.name?.[this.$root.defaultLanguage]) {
              link.name[this.$root.defaultLanguage] = link.name['en'] || '';
            }
            if (!link.description?.[this.$root.defaultLanguage]) {
              link.description[this.$root.defaultLanguage] = link.description['en'] || '';
            }
          });
          this.showHeader = !!this.settings?.header?.[this.$root.defaultLanguage]?.length;
          this.seeMore = !!this.settings?.seeMore?.length;
          if (!this.showHeader) {
            this.settings.header = null;
          }
          this.originalSettings = settings && JSON.parse(JSON.stringify({...settings, links: this.links}));
        })
        .finally(() => {
          this.loading = false;
          if (openForm) {
            window.setTimeout(() => {
              this.$nextTick().then(() => {
                this.$root.$emit('links-form-drawer');
              });
            }, 200);
          }
        });
    },
    reset() {
      this.settings = null;
      this.originalSettings = null;
      this.links = null;
      this.loading = false;
      this.saving = false;
      this.valid = false;
    },
    close() {
      this.originalSettings = null;
      return this.$nextTick().then(() => this.$refs.drawer.close());
    },
    refreshValidation() {
      this.$nextTick().then(() => {
        if (this.$refs.form) {
          this.valid = this.$refs.form.validate();
          if (!this.modified) {
            this.$refs.form.resetValidation();
          }
        }
      });
    },
    save() {
      this.saving = true;
      const settings = {
        ...this.settings
      };
      this.links.forEach((link, index) => link.order = index);
      settings.links = this.links && JSON.parse(JSON.stringify(this.links)) || [];
      settings.links.forEach(l => delete l.iconSrc);
      this.$linkService.saveSettings(settings)
        .then(() => {
          this.$root.$emit('links-refresh');
          this.close();
          this.$root.$emit('alert-message', this.$t('links.label.savedSuccessfully'), 'success');
        })
        .catch(() => this.$root.$emit('alert-message', this.$t('links.label.errorSaving'), 'error'))
        .finally(() => this.saving = false);
    },
    moveTop(index) {
      const links = this.links.slice();
      const linkTmp = links[index - 1];
      links[index - 1] = links[index];
      links[index] = linkTmp;
      this.links = links;
    },
    moveDown(index) {
      const links = this.links.slice();
      const linkTmp = links[index + 1];
      links[index + 1] = links[index];
      links[index] = linkTmp;
      this.links = links;
    },
    edit(link, index) {
      this.$root.$emit('links-form-drawer', link, true, index);
    },
    remove(index) {
      this.links.splice(index, 1);
    },
    addLink(link) {
      this.links.push(link);
    },
    editLink(link, index) {
      this.links.splice(index, 1, link);
      this.links = this.links.slice();
    },
  },
};
</script>
