<template>
  <main>
    <div class="search_container" v-if="!article && $route.name != 'lookup'">
      <Autocomplete v-on:submit="select_result" :api="get_search_endpoint" v-on:update-lang-form="update_lang_form">
      </Autocomplete>
      <SearchToolbar @updatePos="update_pos"  @updateScope="update_scope"/>

    </div>
    <div id="above_results" v-if="$route.name" :class="$vuetify.breakpoint.name">
    <div id="suggestions" v-if="!article && !no_results">
    <div class="search_notification" v-if="inflection_suggestions && inflection_suggestions.length"><v-icon left color="primary">info</v-icon><em>{{$route.query.q}}</em> er en bøyd form av
    <span v-for="(item,index) in inflection_suggestions" :key="index"><router-link :to="generate_path(item[0])" @click.native="suggestion_link(item[0])">{{item[0]}}</router-link>{{index == inflection_suggestions.length-1? '.' : ', '}}</span>
    </div>
    <div class="search_notification" v-if="lang=='bm,nn' && similar && similar.length > 0 && (search_results.nn && search_results.nn.length == 0)"><v-icon left color="primary">info</v-icon>Legg til lignende treff fra Nynorskordboka:
    <span v-for="(item,index) in similar" :key="index"><router-link :to="generate_path($route.query.q+'|'+item[0])" @click.native="suggestion_link($route.query.q+'|'+item[0])">{{item[0]}}</router-link>{{index == similar.length-1? '.' : ', '}}</span>
    </div>
    <div class="search_notification" v-if="lang=='bm,nn' && similar && similar.length > 0 && (search_results.bm && search_results.bm.length == 0)"><v-icon left color="primary">info</v-icon>Legg til lignende treff fra Bokmålsordboka:
    <span v-for="(item,index) in similar" :key="index"><router-link :to="generate_path($route.query.q+'|'+item[0])" @click.native="suggestion_link($route.query.q+'|'+item[0])">{{item[0]}}</router-link>{{index == similar.length-1? '.' : ', '}}</span>
    </div>
    </div>

        <div id="return_to_results" v-if="article">
          <router-link id="return_link" v-if="$store.state.searchRoute" :to="$store.state.searchRoute" @click.native="return_to_results()">
            <v-icon left class="nav_arrow">chevron_left</v-icon>{{$t("back_to_results")}}
          </router-link>
          <a id="return_link" v-if="!$store.state.searchRoute" href="/">
            <v-icon left class="nav_arrow">search</v-icon>Søk i ordbøkene
          </a>
        </div>

      </div>
    
    <SearchResults  :results_bm="search_results.bm || []"
                    :results_nn="search_results.nn || []"
                    :lang="lang"
                    @article-click="article_link_click"
                    @details-click="details_click"
                    @update-page="update_page"
                    v-if="$route.name && !waiting && !article && !error && !no_results" />
    <div id="spinner" v-if="waiting">
      <v-progress-circular indeterminate color="secondary" size="120"></v-progress-circular>
    </div>
    <div id="single_article_container" v-if="article">
      <Article :key="article_key" 
               :article="article" 
               title_id="result0"
               @article-click="article_link_click"
               @details-click="details_click"/>
    </div>
    <div class="welcome" v-show="$route.name=='/' || !$route.name">
      <div class="monthly" :class="$vuetify.breakpoint.name">
        <div>
          <Article :article="monthly_bm" 
                    title_id="result0"
                    @article-click="article_link_click" 
                    @details-click="details_click" />
        </div>
        <div>
          <Article :article="monthly_nn" 
                    title_id="result1"
                    @article-click="article_link_click" 
                    @details-click="details_click"/>
        </div>
      </div>
    </div>
    
    <div class="error" v-if="error">
       <div>
        <h1 tabindex="0" id="result0">{{error.title}}</h1>
        <p>{{error.description}}</p>
       </div>
     </div>
     <div class="no_results" v-if="no_results && !error">
       <div>
         <p><v-icon left color=primary>error</v-icon> Ingen treff <span v-if="pos_selected"> i søk på {{$t('pos_plural.'+pos_selected)}}</span></p>
         <p v-if="!article && !no_results && inflection_suggestions && inflection_suggestions.length"><em>{{$route.query.q}}</em> er en bøyd form av
    <span v-for="(item,index) in inflection_suggestions" :key="index"><router-link :to="generate_path(item[0])" @click.native="suggestion_link(item[0])">{{item[0]}}</router-link>{{index == inflection_suggestions.length-1? '.' : ', '}}</span>
         <p class="suggest_lang" v-if="lang=='bm'">Har du søkt i feil ordbok?<br>Prøv å søke i <router-link :to="generate_path($route.query.q, {lang: 'nn'})" @click.native="language_link('nn')">Nynorskordboka</router-link></p> 
         <p class="suggest_lang" v-if="lang=='nn'">Har du søkt i feil ordbok?<br>Prøv å søke i <router-link :to="generate_path($route.query.q, {lang: 'nn'})" @click.native="language_link('bm')">Bokmålsordboka</router-link></p> 
       <article v-if="similar && similar.length" :class="'v-sheet v-card rounded-xl did_you_mean ' + $vuetify.breakpoint.name">
       <span class="dict-label">Mente du:</span>
       <v-list>
         <v-list-item v-for="(item, index) in similar" :key="index">
           <router-link :to="generate_path(item[0])" @click.native="suggestion_link(item[0])">{{item[0]}}</router-link><span v-if="lang=='bm,nn'" >&nbsp;<em>({{["bm","nn","bm, nn"][item[1]-1]}})</em></span>
         </v-list-item>
       </v-list>

       </article>
       </div>
     </div>
      
    
  </main>
</template>

<script>
import axios from "axios"
import entities from '../utils/entities.js'
import Article from './Article.vue'
import SearchResults from './SearchResults.vue'
import Autocomplete from './Autocomplete.vue'
import SearchToolbar from './SearchToolbar.vue'

import { setup } from 'axios-cache-adapter'

const SEARCH_ENDPOINT = process.env.VUE_APP_SEARCH_ENDPOINT
const ARTICLE_ENDPOINT= process.env.VUE_APP_ARTICLE_ENDPOINT

const api = setup({
  baseURL: SEARCH_ENDPOINT,
  cache: {
    maxAge: 15 * 60 * 1000,
    exclude: {
      query: false,
      paths: ["articles"] // Disable caching for articles
    }
  }
})


function navigate_to_article(self, origin) {
  self.article = null
  self.waiting_for_articles = true

  const lang = self.$route.params.lang

  axios.get(ARTICLE_ENDPOINT + lang + '/article/' + self.$route.params.id + ".json")
  .then(function(response){
    self.article = Object.assign(response.data, {'dictionary': lang, results: self.search_results})
    self.error = null
  })
  .catch(function(error){
    console.log(error)
    self.handle_error(error, true)
  })
  .then(function(response){
    self.waiting_for_articles = false
    self.replace_history()
    if (origin) {
      self.$plausible.trackEvent('internal link incoming', {props: {origin}})
    }
  })
}

function load_articles(self, query, offset, n, dict) {
  let article_IDs = self.article_info.articles[dict]
  if (article_IDs)
  {
  if (offset > article_IDs.length) {
  
    n = 0
  }
  else if (offset + n > article_IDs.length) {
    n = article_IDs.length % n
    
  }

  if (n > 0 && (self.lang == dict || self.lang == "bm,nn")) {
    article_IDs = article_IDs.slice(offset, offset + n)

    return Promise.all(article_IDs.map((article_id) => {
      return axios.get(`${ARTICLE_ENDPOINT}${dict}/article/${article_id}.json`)

    }))
    .then((response) => {
      let results = response.map((element, index) => {
        return Object.assign(element.data, {
          dictionary: dict
        })
      })
      self.article = null
      self.search_results[dict] = results
    })
    .catch(error => {
      self.waiting_for_articles = false
      self.handle_error(error)
    })
  }
    else {
    self.search_results[dict] = []
  }
  }
    return Promise.resolve()
}


function navigate_to_query(self, word) {
  self.error = null
  self.waiting_for_articles = true
  if (!self.event) {
    self.event = {match: word}
  }
  let  query = self.event

  self.inflection_suggestions = (self.event && query.inflection_suggestions) || []

  // Get article IDs
  let params = {w: query.match, dict: self.lang, scope: self.scope, meta: 'y'}
  let offset = 0
  if (self.page) {
    offset = self.perPage * (self.page -1)
  }
  if (self.pos_selected) params.wc = self.pos_selected
  api.get('articles?', {params}).then((response) => {
            self.article_info = response.data
            self.search_results = {}

            let bm_length = response.data.articles.bm ? response.data.articles.bm.length : 0
            let nn_length = response.data.articles.nn ? response.data.articles.nn.length : 0

          if (self.lang == 'bm,nn' && (bm_length == 0 || nn_length == 0)) {
            let missing_lang = bm_length == 0? 1 : 2
            let similar = (self.event && query.similar) || []
            self.similar = similar.filter((item, index) => {
              return item[1] == missing_lang || item[1] == 3
            })
          }
          else {
            self.similar = []
          }
          

          if (bm_length + nn_length == 0) {
            self.similar = (self.event && query.similar) || []
            self.waiting_for_articles = false
            self.no_results = true
            self.replace_history() // fixes routing bug when going back from suggested search

          }
          else {

            self.no_results = null
            Promise.all([
              load_articles(self, query, offset, self.perPage, "bm"),
              load_articles(self, query, offset, self.perPage, "nn")
            ])
            .then(() => {
              // Show inflection suggestions if they are not among the first results

              /*
              if (self.event && self.event.inflection_suggestions) {
                self.inflection_suggestions = self.event.inflection_suggestions.filter((item) => {
                if ((item[1] == 1 || item[1] == 3) && self.search_results.bm) {
                  if (!self.search_results.bm[0]) {
                    console.log("SUGGEST ERROR: no bm results")
                  }
                  else return !self.search_results.bm[0].suggest.includes(item[0])
                }
                if ((item[1] == 2 || item[1] == 3) && self.search_results.nn) {
                  if (!self.search_results.nn[0]) {
                    console.log("SUGGEST ERROR: no nn results")
                  }
                  else return !self.search_results.nn[0].suggest.includes(item[0])
                }
                })
              } else {
                self.inflection_suggestions = []
              }
              */

              self.waiting_for_articles = false
              self.$store.commit('setSearchRoute', self.$route.fullPath)
              
              self.replace_history()
            })
          }
        }).catch(error =>{
          self.waiting_for_articles = false
          console.log(error)
            self.handle_error(error)
            self.replace_history()         
        })
}

export default {
  name: 'DictionaryView',
  data: function() {
    return {
      article_key: 0,
      search_results: {},
      lang: this.$store.state.defaultDict,
      waiting_for_articles: true,
      waiting_for_metadata: true,
      article: null,
      error: null,
      no_results: null,
      monthly_bm: null,
      monthly_nn: null,
      event: null,
      scope: "wb",
      pos_selected: "ALL",
      article_info: null,
      page: 1,
      perPage: 10,
      inflection_suggestions: null,
      similar: null,
      selected: null
    }
  },
  computed: {
    waiting: function() {
      return (this.waiting_for_articles || this.waiting_for_metadata) && this.$route.name != 'root'
    },
    get_search_endpoint: function() {
      return api
    }
  },
  components: {
    Article,
    Autocomplete,
    SearchResults,
    SearchToolbar
  },
  methods: {
    replace_history: function() {
          history.replaceState({article: this.article, 
                              search_results: this.search_results, 
                              article_info: this.article_info,
                              lang: this.lang, 
                              error: this.error,
                              no_results: this.no_results,
                              pos_selected: this.pos_selected,
                              scope: this.scope,
                              article_info: this.article_info,
                              page: this.page,
                              perPage: this.perPage,
                              selected: this.selected,
                              inflection_suggestions: this.inflection_suggestions,
                              similar: this.similar}, '')


    },
    total_results: function() {
      if (this.article_info) {
        let total = 0
        if (this.article_info.articles.bm) {
          total += this.article_info.articles.bm.length
        }
        if (this.article_info.articles.nn) {
          total += this.article_info.articles.nn.length
        }

        return total
      }
    },
    load_monthly_bm: function() {
      let self = this
      axios.get(ARTICLE_ENDPOINT + 'bm/article/5607.json').then(function(response){
        self.monthly_bm = Object.assign(response.data, {dictionary: 'bm'})
      })
    },  
    load_monthly_nn: function() {
      let self = this
      axios.get(ARTICLE_ENDPOINT + 'nn/article/78569.json').then(function(response){
        self.monthly_nn = Object.assign(response.data, {dictionary: 'nn'})
      })
    },
    handle_error: function(error, article) {    
      this.search_results = {}
      console.log(error)
      if (error.message == "Network Error") {
        this.error = {title: this.$t('error.network.title'), description: this.$t('error.network.description'), article}
      }
      else if (error.response) {
        if (error.response.status == 404) {
          if (article) {
            this.error = {title: this.$t('error.404.title'), description: this.$t('error.no_article', {id: this.$route.params.id}), article: true}
          }
          else {
            this.error = {title: this.$t('error.404.title'), description: this.$t('error.404.description'), article}
          }
        }
        else if (error.response.status == 503) {
          this.error = {title: this.$t('error.503.title'), description: this.$t('error.503.description'), article}
        }
        else if (String(error.response.status)[0] == "5") {
          this.error = {title: this.$t('error.server.title'), description: this.$t('error.server.description', {code: error.response.status}), article}
        }
        else {
          this.error = {title: this.$t('error.generic_code.title'), description: this.$t('error.generic_code.description', {code: error.response.status}), article}
        }
      } else {
        this.error = {title: this.$t('error.generic.title'), description: this.$t('error.generic.description'), article}
      }
    },
    suggestion_link: function (word) {
      this.pos_selected = null
      this.event = null
      this.inflection_suggestions = null
      navigate_to_query(this, word)
    },
    language_link: function (lang) {
      let word = this.$route.query.q
      this.pos_selected = null
      this.event = null
      this.inflection_suggestions = null
      this.lang = lang
      navigate_to_query(this, word)

    },
    select_result: function (event) {
        this.event = event
        let path = `/${this.lang}/search`
        let pos = this.pos_param()
        let query = {q: event.match || event.q}
        if (pos) query["pos"] = pos
        if (this.scope) query["scope"] = this.scope
        this.$router.push({path, query})
        navigate_to_query(this)
         
        // Tracking
        let track_props = {query: event.q}
        if (event.match) track_props.match = event.match
        this.$plausible.trackEvent(event.update_lang ? "language" : 'dropdown selection', {
          props: track_props
        })
      },

      pos_param: function() {
        if (this.pos_selected) return this.pos_selected.toLowerCase()
        return null
      },
      update_page: function() {
        let q = (this.$route.query || this.$route.params).q
        let path = `/${this.lang}/search`
        let pos = this.pos_param()
        let query = {q: q, page: this.page}
        if (pos != 'all') query.pos = pos
        if (this.scope) query.scope = this.scope
        this.$router.push({path, query})
        let offset = 0
        if (this.page) {
          offset = this.perPage * (this.page -1)
        }

      let self = this
      Promise.all([
      load_articles(this, query, offset, this.perPage, "bm"),
      load_articles(this, query, offset, this.perPage, "nn")]).then(() => {
         self.replace_history()
         self.$forceUpdate()
      }
      ).then(() => {
        this.$store.commit('setSearchRoute', this.$route.fullPath)
      })
      },

        generate_path: function(q, params) {
        if (q) {
          let path = `/${(params && params.lang) || this.lang}/search?q=${q}`
          if (this.scope) path += "&scope=" + this.scope
          return path
        } 
      },

      reload_params: function() {
        let q = (this.$route.query || this.$route.params).q
        if (q) {
          let path = `/${this.lang}/search`
          let pos = this.pos_param()
          let query = {q: q}
          if (pos) query.pos = pos
          if (this.scope) query.scope = this.scope
          this.$router.push({path, query})
          navigate_to_query(this, q)
        } 
      },

      update_lang_form: function (lang) {
        this.lang = lang
        this.page = 1
      },
      update_scope: function(scope) {
        this.scope = scope
        this.page = 1
        this.reload_params()
      },
      update_pos: function (pos) {
        this.pos_selected = pos
        this.page = 1
        this.reload_params()
      },

    article_link_click: function(item) {
      if (this.article && this.article.article_id == item.article_id){
        this.article_key++
        this.replace_history()
        if (!this.$route.hash) {
          window.scrollTo(0,0)
        }

      }else{
        navigate_to_article(this, item.source)
        if (!this.$route.hash) {
          window.scrollTo(0,0)
        }
      }
    },
    details_click: function(item) {
      this.article = item.article
      this.replace_history()
    },
    return_to_results: function() {
      this.article = null
    }
  },
  mounted: function(){


    let self = this
    self.lang = self.$route.params.lang || this.$store.state.defaultDict
    if (self.$route.query.pos) {
    self.pos_selected = self.$route.query.pos.toUpperCase()
    } else self.pos_selected = null

    if (self.$route.query.scope) {
      self.scope = self.$route.query.scope
    } 
    if (self.$route.query.page) self.page = parseInt(self.$route.query.page)
    if (self.$route.query.perPage) self.perPage = self.$route.query.perPage

    Promise.all([
      axios.get(ARTICLE_ENDPOINT + 'bm/concepts.json').then(function(response){
        let concepts = response.data.concepts
        entities.bm = concepts
      }),
      axios.get(ARTICLE_ENDPOINT + 'nn/concepts.json').then(function(response){
        let concepts = response.data.concepts
        entities.nn = concepts
      })
    ]).then(function(_) {
      self.waiting_for_metadata = false
      if (self.$route.name == 'query') {
        navigate_to_query(self, self.$route.query.q)
      }
      else if(self.$route.name == 'search') {
        navigate_to_query(self, self.$route.params.query)
      } 
      else if(self.$route.name == 'word') {
        navigate_to_query(self, self.$route.params.query)
      }
      else if(self.$route.name == 'lookup'){
        navigate_to_article(self, self.$route.path)
      }
      else {
        self.waiting_for_articles = false
        self.replace_history()
        self.load_monthly_bm()
        self.load_monthly_nn()

      }
    }).catch(function(error){
      if (error.message == "Network Error") {
        self.error = self.$t('error.network')
      }
      else if (error.response) {
        self.error = self.$t('error.server', {code: error.response.status})
      } 
      else {
        self.error = self.$t('error.generic')
      }
      self.waiting_for_metadata = false
      self.waiting_for_articles = false
    })
  },
  watch: {
    $route(to, from) {
      if (to.fullPath == "/") {        
        this.load_monthly_bm()
        this.load_monthly_nn()
      }
      if (to.name == 'lookup' && from.fullPath == '/') {
        this.$store.commit('setSearchRoute', null)
      }
    }
  },
  created: function() {
    let self = this
    window.onpopstate = function (event) {
      if (event.state) {
        self.article = event.state.article
        self.search_results = event.state.search_results
        self.article_info = event.state.article_info
        self.lang = event.state.lang
        self.pos_selected = event.state.pos_selected
        self.scope = event.state.scope
        self.error = event.state.error
        self.no_results = event.state.no_results
        self.page = event.state.page,
        self.perPage = event.state.perPage
        self.selected = event.state.selected
        self.inflection_suggestions = event.state.inflection_suggestions,
        self.similar = event.state.similar
      }
    }
  }
}
</script>

<style>
main {
  flex: 1 0 auto;
  background-color: var(--v-tertiary-base);
  display: flex;
  flex-direction: column;
}


div.welcome {
  padding-top: 10px;
  margin-top: 10px;
  flex-grow: 10;
  background-image: url('../assets/books.jpg');
  background-repeat: no-repeat;
  background-position-x: center;
}

div.welcome article {
  border-style: none;
}

.search_container {
  background-color: var(--v-tertiary-base);
  padding-top: 10px;
}

#spinner {
  margin: auto;
}

#search_results, #spinner, #above_results, #single_article_container, div.welcome, div.search_container, .error, .no_results {
  padding-left: calc((100vw - 1200px) / 2);
  padding-right: calc((100vw - 1200px) / 2);
}

#above_results .search_notification {
  padding-top: 24px;
  padding-bottom: 0px;
  margin-left: 10px;
  font-size: 18px;
}

#above_results.sm .search_notification, #above_results.xs .search_notification {
  padding-top: 10px;
}

#suggestions {
  padding-left: 10px;
}


.error p, .no_results p {
  margin-left: 15px;
}

.no_results {
  padding-top: 24px;
}

.error div{
  padding: 10px;
  padding-top: 24px;
}

#spinner {
  padding-top: 40px;
}

div.monthly {
  display: flex;
  width: 100%;
}

div.monthly > div {
  flex: 50%;
}

div.monthly.sm, div.monthly.xs {
  flex-direction: column;
}

div.monthly article.bm .dict-label::before {
  content: "fra ";
}

div.monthly article.nn .dict-label::before {
  content: "frå ";
}

div.monthly details, div.monthly h3 {
  display: none;
}

.v-label span {
  color: var(--v-primary-base);
}

.lang_select_container {
  padding-left: 10px;
}

.pos_select_container {
  padding-left: 10px;
  padding-right: 10px;
  padding-bottom: 0px;
  padding-top: 10px;
}

li.suggestion {
  font-weight: bold;
  padding-left: 20px;
  padding-top: 5px;
  padding-bottom: 5px;
  border: 0px;
  background-image: none;
}

::selection {
  background: var(--v-secondary-base);
  color: white;
}

#return_to_results {
  padding-left: 10px;
  padding-top: 10px;
  display: table-cell;
}

#return_to_results a {
  color: var(--v-text-base) !important;
  text-decoration: none;
}

.nav_arrow {
  color: var(--v-primary-base) !important;
}

.col {
  padding: 10px;
}

.suggest_lang {
  padding-left: 10px;
}

.did_you_mean.md, .did_you_mean.lg, .did_you_mean.xl {
  max-width: 40%;
}


</style>