<script>
import FileSaver from 'file-saver'
import { ExportTypes } from 'nocodb-sdk'
import DropOrSelectFileModal from '~/components/import/DropOrSelectFileModal'
import ColumnMappingModal from '~/components/project/spreadsheet/components/importExport/ColumnMappingModal'
import CSVTemplateAdapter from '~/components/import/templateParsers/CSVTemplateAdapter'
import { UITypes } from '~/components/project/spreadsheet/helpers/uiTypes'
import WebhookModal from '~/components/project/tableTabs/webhook/WebhookModal'
import WebhookSlider from '~/components/project/tableTabs/webhook/WebhookSlider'

export default {
  name: 'ExportImport',
  components: {
    WebhookSlider,
    WebhookModal,
    ColumnMappingModal,
    DropOrSelectFileModal,
  },
  props: {
    meta: Object,
    nodes: Object,
    selectedView: Object,
    publicViewId: String,
    queryParams: Object,
    isView: Boolean,
    reqPayload: Object,
  },
  data() {
    return {
      importModal: false,
      columnMappingModal: false,
      parsedCsv: {},
      webhookModal: false,
    }
  },

  methods: {
    async onCsvFileSelection(file) {
      const reader = new FileReader()
      reader.onload = async (e) => {
        const templateGenerator = new CSVTemplateAdapter(file.name, e.target.result)
        await templateGenerator.init()
        templateGenerator.parseData()
        this.parsedCsv.columns = templateGenerator.getColumns()
        this.parsedCsv.data = templateGenerator.getData()
        this.columnMappingModal = true
        this.importModal = false
      }

      reader.readAsText(file)
    },

    async extractCsvData() {
      return Promise.all(
        this.data.map(async (r) => {
          const row = {}
          for (const col of this.availableColumns) {
            if (col.virtual) {
              let prop, cn
              if (col.mm || (col.lk && col.lk.type === 'mm')) {
                const tn = col.mm ? col.mm.rtn : col.lk.ltn
                const title = col.mm ? col.mm._rtn : col.lk._ltn
                await this.$store.dispatch('meta/ActLoadMeta', {
                  env: this.nodes.env,
                  dbAlias: this.nodes.dbAlias,
                  tn,
                })

                prop = `${title}MMList`
                cn = col.lk
                  ? col.lk._lcn
                  : (
                      this.$store.state.meta.metas[tn].columns.find((c) => c.pv) ||
                      this.$store.state.meta.metas[tn].columns.find((c) => c.pk) ||
                      {}
                    ).title

                row[col.title] = r.row[prop] && r.row[prop].map((r) => cn && r[cn])
              } else if (col.hm || (col.lk && col.lk.type === 'hm')) {
                const tn = col.hm ? col.hm.table_name : col.lk.ltn
                const title = col.hm ? col.hm.title : col.lk._ltn

                await this.$store.dispatch('meta/ActLoadMeta', {
                  env: this.nodes.env,
                  dbAlias: this.nodes.dbAlias,
                  tn,
                })

                prop = `${title}List`
                cn = col.lk
                  ? col.lk._lcn
                  : (
                      this.$store.state.meta.metas[tn].columns.find((c) => c.pv) ||
                      this.$store.state.meta.metas[tn].columns.find((c) => c.pk)
                    ).title
                row[col.title] = r.row[prop] && r.row[prop].map((r) => cn && r[cn])
              } else if (col.bt || (col.lk && col.lk.type === 'bt')) {
                const tn = col.bt ? col.bt.rtn : col.lk.ltn
                const title = col.bt ? col.bt._rtn : col.lk._ltn
                await this.$store.dispatch('meta/ActLoadMeta', {
                  env: this.nodes.env,
                  dbAlias: this.nodes.dbAlias,
                  tn,
                })

                prop = `${title}Read`
                cn = col.lk
                  ? col.lk._lcn
                  : (
                      this.$store.state.meta.metas[tn].columns.find((c) => c.pv) ||
                      this.$store.state.meta.metas[tn].columns.find((c) => c.pk) ||
                      {}
                    ).title
                row[col.title] = r.row[prop] && r.row[prop] && cn && r.row[prop][cn]
              } else {
                row[col.title] = r.row[col.title]
              }
            } else if (col.uidt === 'Attachment') {
              let data = []
              try {
                if (typeof r.row[col.title] === 'string') {
                  data = JSON.parse(r.row[col.title])
                } else if (r.row[col.title]) {
                  data = r.row[col.title]
                }
              } catch {}
              row[col.title] = (data || []).map((a) => `${a.title}(${a.url})`)
            } else {
              row[col.title] = r.row[col.title]
            }
          }
          return row
        }),
      )
    },
    async exportCsv() {
      let offset = 0
      let c = 1

      try {
        while (!isNaN(offset) && offset > -1) {
          let res
          if (this.publicViewId) {
            res = await this.$api.public.csvExport(this.publicViewId, ExportTypes.CSV, {
              responseType: 'blob',
              query: {
                fields:
                  this.queryParams &&
                  this.queryParams.fieldsOrder &&
                  this.queryParams.fieldsOrder.filter((c) => this.queryParams.showFields[c]),
                offset,
                sortArrJson: JSON.stringify(
                  this.reqPayload &&
                    this.reqPayload.sorts &&
                    this.reqPayload.sorts.map(({ fk_column_id, direction }) => ({
                      direction,
                      fk_column_id,
                    })),
                ),
                filterArrJson: JSON.stringify(this.reqPayload && this.reqPayload.filters),
              },
              headers: {
                'xc-password': this.reqPayload && this.reqPayload.password,
              },
            })
          } else {
            res = await this.$api.dbViewRow.export(
              'noco',
              this.projectName,
              this.meta.title,
              this.selectedView.title,
              ExportTypes.CSV,
              {
                responseType: 'blob',
                query: {
                  offset,
                },
              },
            )
          }
          const { data } = res

          offset = +res.headers['nc-export-offset']
          const blob = new Blob([data], { type: 'text/plain;charset=utf-8' })
          FileSaver.saveAs(blob, `${this.meta.title}_exported_${c++}.csv`)
          if (offset > -1) {
            this.$toast.info('Downloading more files').goAway(3000)
          } else {
            this.$toast.success('Successfully exported all table data').goAway(3000)
          }
        }
      } catch (e) {
        console.log(e)
        this.$toast.error(e.message).goAway(3000)
      }
    },
    async importData(columnMappings) {
      try {
        const data = this.parsedCsv.data
        for (let i = 0, progress = 0; i < data.length; i += 500) {
          const batchData = data.slice(i, i + 500).map((row) =>
            columnMappings.reduce((res, col) => {
              // todo: parse data
              if (col.enabled && col.destCn) {
                const v = this.meta && this.meta.columns.find((c) => c.title === col.destCn)
                let input = row[col.sourceCn]
                // parse potential boolean values
                if (v.uidt == UITypes.Checkbox) {
                  input = input.replace(/["']/g, '').toLowerCase().trim()
                  if (input == 'false' || input == 'no' || input == 'n') {
                    input = '0'
                  } else if (input == 'true' || input == 'yes' || input == 'y') {
                    input = '1'
                  }
                } else if (v.uidt === UITypes.Number) {
                  if (input == '') {
                    input = null
                  }
                } else if (v.uidt === UITypes.SingleSelect || v.uidt === UITypes.MultiSelect) {
                  if (input == '') {
                    input = null
                  }
                }
                res[col.destCn] = input
              }
              return res
            }, {}),
          )
          await this.$api.dbTableRow.bulkCreate('noco', this.projectName, this.meta.title, batchData)
          progress += batchData.length
          this.$store.commit('loader/MutMessage', `Importing data : ${progress}/${data.length}`)
          this.$store.commit('loader/MutProgress', Math.round((100 * progress) / data.length))
        }
        this.columnMappingModal = false
        this.$store.commit('loader/MutClear')
        this.$emit('reload')
        this.$toast.success('Successfully imported table data').goAway(3000)
      } catch (e) {
        this.$toast.error(e.message).goAway(3000)
      }
    },
  },
}
</script>

<template>
  <div>
    <v-menu open-on-hover bottom offset-y transition="slide-y-transition">
      <template #activator="{ on }">
        <v-btn
          v-t="['c:actions']"
          outlined
          class="nc-actions-menu-btn caption px-2 nc-remove-border font-weight-medium"
          small
          text
          v-on="on"
        >
          <v-icon small color="#777"> mdi-flash-outline </v-icon>
          <!-- More -->
          {{ $t('general.more') }}

          <v-icon small color="#777"> mdi-menu-down </v-icon>
        </v-btn>
      </template>

      <v-list dense>
        <v-list-item v-t="['a:actions:download-csv']" dense @click="exportCsv">
          <v-list-item-title>
            <v-icon small class="mr-1"> mdi-download-outline </v-icon>
            <span class="caption">
              <!-- Download as CSV -->
              {{ $t('activity.downloadCSV') }}
            </span>
          </v-list-item-title>
        </v-list-item>
        <v-list-item v-if="_isUIAllowed('csvImport') && !isView" v-t="['a:actions:upload-csv']" dense @click="importModal = true">
          <v-list-item-title>
            <v-icon small class="mr-1" color=""> mdi-upload-outline </v-icon>
            <span class="caption">
              <!-- Upload CSV -->
              {{ $t('activity.uploadCSV') }}
            </span>

            <span class="caption grey--text">(<x-icon small color="grey lighten-2"> mdi-alpha </x-icon> version)</span>
          </v-list-item-title>
        </v-list-item>
        <v-list-item
          v-if="_isUIAllowed('SharedViewList') && !isView"
          v-t="['a:actions:shared-view-list']"
          dense
          @click="$emit('showAdditionalFeatOverlay', 'shared-views')"
        >
          <v-list-item-title>
            <v-icon small class="mr-1" color=""> mdi-view-list-outline </v-icon>
            <span class="caption">
              <!-- Shared View List -->
              {{ $t('activity.listSharedView') }}
            </span>
          </v-list-item-title>
        </v-list-item>
        <v-list-item v-if="_isUIAllowed('webhook') && !isView" v-t="['c:actions:webhook']" dense @click="webhookModal = true">
          <v-list-item-title>
            <v-icon small class="mr-1" color=""> mdi-hook </v-icon>
            <span class="caption"> Webhooks </span>
          </v-list-item-title>
        </v-list-item>
      </v-list>
    </v-menu>
    <DropOrSelectFileModal v-model="importModal" accept=".csv" text="CSV" @file="onCsvFileSelection" />
    <ColumnMappingModal
      v-if="columnMappingModal && meta"
      v-model="columnMappingModal"
      :meta="meta"
      :import-data-columns="parsedCsv.columns"
      :parsed-csv="parsedCsv"
      @import="importData"
    />
    <!--    <webhook-modal v-if="webhookModal" v-model="webhookModal" :meta="meta" /> -->
    <WebhookSlider v-model="webhookModal" :meta="meta" />
  </div>
</template>

<style scoped></style>
