<template>

  <form class="ui form component-form" role="alert" @submit.prevent="submit()">
    <div v-if="errors.length > 0" class="ui negative message">
      <h4 class="header"><translate translate-context="Content/*/Error message.Title">We cannot save your changes</translate></h4>
      <ul class="list">
        <li v-for="error in errors">{{ error }}</li>
      </ul>
    </div>
    <div class="ui field">
      <label for="application-name"><translate translate-context="*/*/*/Noun">Name</translate></label>
      <input id="application-name" name="name" required type="text" v-model="fields.name" />
    </div>
    <div class="ui field">
      <label for="redirect-uris"><translate translate-context="Content/Applications/Input.Label/Noun">Redirect URI</translate></label>
      <input id="redirect-uris" name="redirect_uris" type="text" v-model="fields.redirect_uris" />
      <p class="help">
        <translate translate-context="Content/Applications/Help Text">
          Use "urn:ietf:wg:oauth:2.0:oob" as a redirect URI if your application is not served on the web.
        </translate>
      </p>
    </div>
    <div class="ui field">
      <label><translate translate-context="Content/*/*/Noun">Scopes</translate></label>
      <p>
        <translate translate-context="Content/Applications/Paragraph/">
          Checking the parent "Read" or "Write" scopes implies access to all the corresponding children scopes.
        </translate>
      </p>
      <div class="ui stackable two column grid">
        <div v-for="parent in allScopes" class="column">
          <div class="ui parent checkbox">
            <input
              v-model="scopeArray"
              :value="parent.id"
              :id="parent.id"
              type="checkbox">
            <label :for="parent.id">
              {{ parent.label }}
              <p class="help">
                {{ parent.description }}
              </p>
            </label>
          </div>

          <div v-for="child in parent.children">
            <div class="ui child checkbox">
              <input
                v-model="scopeArray"
                :value="child.id"
                :id="child.id"
                type="checkbox">
              <label :for="child.id">
                {{ child.id }}
                <p class="help">
                  {{ child.description }}
                </p>
              </label>
            </div>
          </div>
        </div>
      </div>

      </div>
    <button :class="['ui', {'loading': isLoading}, 'success', 'button']" type="submit">
      <translate v-if="updating" key="2" translate-context="Content/Applications/Button.Label/Verb">Update application</translate>
      <translate v-else key="3" translate-context="Content/Applications/Button.Label/Verb">Create application</translate>
    </button>
  </form>
</template>

<script>
import _ from "@/lodash"
import axios from "axios"
import TranslationsMixin from "@/components/mixins/Translations"

export default {
  mixins: [TranslationsMixin],
  props: {
    app: {type: Object, required: false},
    defaults: {type: Object, required: false}
  },
  data() {
    let app = this.app || {}
    let defaults = this.defaults || {}
    return {
      isLoading: false,
      errors: [],
      fields: {
        name: app.name || defaults.name || '',
        redirect_uris: app.redirect_uris || defaults.redirect_uris || 'urn:ietf:wg:oauth:2.0:oob',
        scopes: app.scopes || defaults.scopes || 'read'
      },
      scopes: [
        {id: "profile", icon: 'user'},
        {id: "libraries", icon: 'book'},
        {id: "favorites", icon: 'heart'},
        {id: "listenings", icon: 'music'},
        {id: "follows", icon: 'users'},
        {id: "playlists", icon: 'list'},
        {id: "radios", icon: 'rss'},
        {id: "filters", icon: 'eye slash'},
        {id: "notifications", icon: 'bell'},
        {id: "edits", icon: 'pencil alternate'},
      ]
    }
  },
  methods: {
    submit () {
      this.errors = []
      let self = this
      self.isLoading = true
      let payload = this.fields
      let event, promise, message
      if (this.updating) {
        event = 'updated'
        promise = axios.patch(`oauth/apps/${this.app.client_id}/`, payload)
      }  else {
        event = 'created'
        promise = axios.post(`oauth/apps/`, payload)
      }
      return promise.then(
        response => {
          self.isLoading = false
          self.$emit(event, response.data)
        },
        error => {
          self.isLoading = false
          self.errors = error.backendErrors
        }
      )
    },
  },
  computed: {
    updating () {
      return this.app
    },
    scopeArray: {
      get () {
        return this.fields.scopes.split(' ')
      },
      set (v) {
        this.fields.scopes = _.uniq(v).join(' ')
      }
    },
    allScopes () {
      let self = this
      let parents = [
        {
          id: 'read',
          label: this.$pgettext('Content/OAuth Scopes/Label/Verb', 'Read'),
          description: this.$pgettext('Content/OAuth Scopes/Help Text', 'Read-only access to user data'),
          value: this.scopeArray.indexOf('read') > -1
        },
        {
          id: 'write',
          label: this.$pgettext('Content/OAuth Scopes/Label/Verb', 'Write'),
          description: this.$pgettext('Content/OAuth Scopes/Help Text', 'Write-only access to user data'),
          value: this.scopeArray.indexOf('write') > -1
        },
      ]
      parents.forEach((p) => {
        p.children = self.scopes.map(s => {
          let id = `${p.id}:${s.id}`
          return {
            id,
            value: this.scopeArray.indexOf(id) > -1,
          }
        })
      })
      return parents
    }
  }
}
</script>
