<template lang='pug'>
  v-container(fluid, grid-list-lg)
    v-layout(row, wrap)
      v-flex(xs12)
        .admin-header
          img.animated.fadeInUp(src='/svg/icon-process.svg', alt='Rendering', style='width: 80px;')
          .admin-header-title
            .headline.primary--text.animated.fadeInLeft Rendering
            .subheading.grey--text.animated.fadeInLeft.wait-p4s Configure how content is rendered #[v-chip(label, color='primary', small).white--text coming soon]
          v-spacer
          v-btn.animated.fadeInDown.wait-p2s(outline, color='grey', @click='refresh', large)
            v-icon refresh
          v-btn.animated.fadeInDown(color='success', @click='save', depressed, large)
            v-icon(left) check
            span {{$t('common:actions.apply')}}

      v-flex.animated.fadeInUp(lg3, xs12)
        v-toolbar(
          color='primary'
          dense
          flat
          dark
          )
          v-icon.mr-2 line_weight
          .subheading Pipeline
        v-expansion-panel.adm-rendering-pipeline(v-model='selectedCore')
          v-expansion-panel-content(
            hide-actions
            v-for='core in renderers'
            :key='core.key'
            )
            v-toolbar(
              slot='header'
              color='blue'
              dense
              dark
              flat
              )
              v-spacer
              .body-2 {{core.input}}
              v-icon.mx-2 arrow_forward
              .caption {{core.output}}
              v-spacer
            v-list.py-0(two-line, dense)
              template(v-for='(rdr, n) in core.children')
                v-list-tile(
                  avatar
                  :key='rdr.key'
                  @click='selectRenderer(rdr.key)'
                  :class='currentRenderer.key === rdr.key ? (darkMode ? `grey darken-4-l4` : `blue lighten-5`) : ``'
                  )
                  v-list-tile-avatar
                    v-icon(:color='currentRenderer.key === rdr.key ? "primary" : "grey"') {{rdr.icon}}
                  v-list-tile-content
                    v-list-tile-title {{rdr.title}}
                    v-list-tile-sub-title {{rdr.description}}
                  v-list-tile-avatar
                    status-indicator(v-if='rdr.isEnabled', positive, pulse)
                    status-indicator(v-else, negative, pulse)
                v-divider.my-0(v-if='n < core.children.length - 1')

      v-flex(lg9, xs12)
        v-card.wiki-form.animated.fadeInUp
          v-toolbar(
            color='grey darken-1'
            dark
            flat
            dense
            )
            v-icon.mr-2 {{currentRenderer.icon}}
            .subheading {{currentRenderer.title}}
            v-spacer
            .pt-3.mt-1
              v-switch(
                dark
                color='white'
                label='Enabled'
                v-model='currentRenderer.isEnabled'
                )
          v-card-text.pb-4.pt-2.pl-4
            v-subheader.pl-0 Rendering Module Configuration
            .body-1.ml-3(v-if='!currentRenderer.config || currentRenderer.config.length < 1') This rendering module has no configuration options you can modify.
            template(v-else, v-for='(cfg, idx) in currentRenderer.config')
              v-select(
                v-if='cfg.value.type === "string" && cfg.value.enum'
                outline
                :items='cfg.value.enum'
                :key='cfg.key'
                :label='cfg.value.title'
                v-model='cfg.value.value'
                :hint='cfg.value.hint ? cfg.value.hint : ""'
                persistent-hint
                :class='cfg.value.hint ? "mb-2" : ""'
              )
              v-switch(
                v-else-if='cfg.value.type === "boolean"'
                :key='cfg.key'
                :label='cfg.value.title'
                v-model='cfg.value.value'
                color='primary'
                :hint='cfg.value.hint ? cfg.value.hint : ""'
                persistent-hint
                )
              v-text-field(
                v-else
                outline
                :key='cfg.key'
                :label='cfg.value.title'
                v-model='cfg.value.value'
                :hint='cfg.value.hint ? cfg.value.hint : ""'
                persistent-hint
                :class='cfg.value.hint ? "mb-2" : ""'
                )
              v-divider.my-3(v-if='idx < currentRenderer.config.length - 1')
          v-card-chin
            v-spacer
            .caption.pr-3.grey--text Module: {{ currentRenderer.key }}
</template>

<script>
import _ from 'lodash'
import { DepGraph } from 'dependency-graph'
import { get } from 'vuex-pathify'

import { StatusIndicator } from 'vue-status-indicator'

import renderersQuery from 'gql/admin/rendering/rendering-query-renderers.gql'

export default {
  components: {
    StatusIndicator
  },
  data() {
    return {
      selectedCore: -1,
      renderers: [],
      currentRenderer: {}
    }
  },
  computed: {
    darkMode: get('site/dark')
  },
  watch: {
    renderers(newValue, oldValue) {
      _.delay(() => {
        this.selectedCore = _.findIndex(newValue, ['key', 'markdownCore'])
        this.selectRenderer('markdownCore')
      }, 500)
    }
  },
  methods: {
    selectRenderer (key) {
      this.renderers.map(rdr => {
        if (_.some(rdr.children, ['key', key])) {
          this.currentRenderer = _.find(rdr.children, ['key', key])
        }
      })
    },
    async refresh () {
      this.$store.commit('showNotification', {
        style: 'indigo',
        message: `Coming soon...`,
        icon: 'directions_boat'
      })
    },
    async save () {
      this.$store.commit('showNotification', {
        style: 'indigo',
        message: `Coming soon...`,
        icon: 'directions_boat'
      })
    }
  },
  apollo: {
    renderers: {
      query: renderersQuery,
      fetchPolicy: 'network-only',
      update: (data) => {
        let renderers = _.cloneDeep(data.rendering.renderers).map(str => ({...str, config: str.config.map(cfg => ({...cfg, value: JSON.parse(cfg.value)}))}))
        // Build tree
        const graph = new DepGraph({ circular: true })
        const rawCores = _.filter(renderers, ['dependsOn', null]).map(core => {
          core.children = _.concat([_.cloneDeep(core)], _.filter(renderers, ['dependsOn', core.key]))
          return core
        })
        // Build dependency graph
        rawCores.map(core => { graph.addNode(core.key) })
        rawCores.map(core => {
          rawCores.map(coreTarget => {
            if (core.key !== coreTarget.key) {
              if (core.output === coreTarget.input) {
                graph.addDependency(core.key, coreTarget.key)
              }
            }
          })
        })
        // Reorder cores in reverse dependency order
        let orderedCores = []
        _.reverse(graph.overallOrder()).map(coreKey => {
          orderedCores.push(_.find(rawCores, ['key', coreKey]))
        })
        return orderedCores
      },
      watchLoading (isLoading) {
        this.$store.commit(`loading${isLoading ? 'Start' : 'Stop'}`, 'admin-rendering-refresh')
      }
    }
  }
}
</script>

<style lang='scss'>
.adm-rendering-pipeline {
  border-top: 1px solid #FFF;

  .v-expansion-panel__header {
    padding: 0 0;
  }
}
</style>
