class BulletinFeed
  include Mongoid::Document
  include Mongoid::Timestamps
  include Slug

  field :title, as: :slug_title, type: String, localize: true
  field :tag_ids, type: Array, default: []
  field :category_ids, type: Array, default: []
  before_save do
    BulletinFeedCache.where(uid: self.uid).each do |cache|
      cache.regenerate
    end
  end
  def self.create_feed_cache(bulletin=nil,bulletin_feed=nil)
    Thread.new do
      if !bulletin.nil?
        BulletinFeed.where(:tag_ids.in => Array(bulletin.tag_ids).collect{|v| v.to_s}).each do |bulletin_feed|
          uid = bulletin_feed.uid
          BulletinFeedCache.where(:uid => uid).each do |cache|
            cache.regenerate
          end
        end
      elsif !bulletin_feed.nil?
        uid = bulletin_feed.uid
        BulletinFeedCache.where(:uid => uid).each do |cache|
          cache.regenerate
        end
      end
    end
  end
  def generate_one_cache_timeout(startdt: nil,enddt: nil,dt: nil, base_url: nil, timeout: nil)
    begin
      if timeout.nil?
        feed_cache = self.generate_one_cache(startdt: startdt,enddt: enddt,dt: dt,base_url: base_url)
        feed_cache.content
      else
        Timeout::timeout(timeout) do
          feed_cache = nil
          Thread.new do
            feed_cache = self.generate_one_cache(startdt: startdt,enddt: enddt,dt: dt,base_url: base_url)
          end
          (1..(timeout.to_i+1)).each do
            sleep(1)
            break if !feed_cache.nil?
          end
          feed_cache.content
        end
      end
    rescue=> e
      puts [e,e.backtrace]
      ""
    end
  end
  def generate_one_cache(startdt: nil,enddt: nil,dt: nil, base_url: nil)
    base_url = Site.first.root_url if base_url.nil?
    uid = self.uid
    bf = self
    if !bf.nil?
      tags = bf.tag_ids
      categories = bf.category_ids
      if !(categories.empty? && tags.empty?)
        anns_before_filter = Bulletin.is_approved_and_show
        can_display_and_sorted_flag = false
        if !dt.nil?
          dt = DateTime.parse(dt)
          dtt = dt + 1.day
          anns_before_filter = anns_before_filter.where(:postdate.gt => dt, :postdate.lt => dtt)
        elsif !startdt.blank? && enddt.blank?
          startdt = DateTime.parse(startdt)
          enddt = DateTime.now
          anns_before_filter = anns_before_filter.where(:postdate.gt => startdt, :postdate.lt => enddt)
        elsif !startdt.blank? && !enddt.blank?
          startdt = DateTime.parse(startdt)
          enddt = DateTime.parse(enddt) + 1.day
          anns_before_filter = anns_before_filter.where(:postdate.gt => startdt, :postdate.lt => enddt)
        else
          can_display_and_sorted_flag = true
        end

        if !tags.empty?
          anns_before_filter = anns_before_filter.filter_by_tags(tags)
        end
        if !categories.empty?
          anns_before_filter = anns_before_filter.filter_by_categories(categories)
        end
        anns_before_filter.selector = {"$and"=>[anns_before_filter.selector,{"$or"=>(I18n.available_locales.map{|v| {"title.#{v}"=>{"$nin"=>["", nil]}}})}]}
        if can_display_and_sorted_flag
          announcements = anns_before_filter.valid_time_range.to_a
        end
      else
        announcements = []
      end
    end
    all_anns = []
    tag_names = []
    category_titles = []
    tag_ids = []
    category_ids = []

    first_postdate = anns_before_filter.open_in_future.limit(1).pluck(:postdate)[0]
    first_deadline = nil
    cat_ids = announcements.collect{|a| a.category_id.blank? ? nil : a.category_id.to_s}.compact.uniq
    tag_ids = announcements.collect{|a| a.tag_ids.collect{|v| v.blank? ? nil : v.to_s}}.flatten.compact.uniq
    basic_query = {:module => 'announcement',:enabled_for=>I18n.locale}
    if !cat_ids.blank?
      query = basic_query.merge({:categories.all => cat_ids})
    else
      query = basic_query.clone
    end
    if !tag_ids.blank?
      query = query.merge({:tags.all => tag_ids})
    end
    page = Page.where(query).first || Page.where(basic_query).first
    more_url = page ? "/#{I18n.locale}#{(page.get_url)}" : nil

    announcements.each_with_index do |anns,i|
      deadline = anns.deadline
      if !deadline.blank?
        if first_deadline.nil? || first_deadline>deadline
          first_deadline = deadline
        end
      end
      user = User.find(anns.create_user_id) rescue nil
      if !user.nil?
        author = user.member_name || user.user_name
      else
        author = ""
      end
      a = {}
      if more_url
        a['show_url'] = "#{more_url}/#{anns.to_param}"
      end
      a["id"] = anns.uid
      a["title_translations"] = anns.title_translations
      a["subtitle_translations"] = anns.subtitle_translations
      a["text_translations"] = {}
      text_translations = anns.text_translations
      a["text_translations"]["en"] = self.class.smart_convertor(text_translations["en"],base_url) if !text_translations["en"].blank?
      a["text_translations"]["zh_tw"] = self.class.smart_convertor(text_translations["zh_tw"],base_url) if !text_translations["zh_tw"].blank?
      a["postdate"] = anns.postdate
      a["image_description_translations"] = anns.image_description_translations
      a["image"] = {}
      a["display_img"] = anns.display_img
      a["image"]["original"] = ("#{base_url}" + anns.image.url rescue "")
      a["image"]["thumb"] = ("#{base_url}" + anns.image.thumb.url rescue "")
      a["image"]["mobile"] = ("#{base_url}" + anns.image.mobile.url rescue "")
      a["tags"] = []
      a["category"] = {}
      a["author"] = author
      a["params"] = anns.to_param
      a["subtitle_ann"] = anns.subtitle if anns.display_subtitle?
      a["bulletin_links"] = []
      a["bulletin_files"] = []
      a["bulletin_carousel_images"] = anns.bulletin_carousel_images.map{|image| {"src"=>"#{base_url}" + image.file.url,"description"=>image.description.to_s,"description_text"=>image.description_text }}
      a["external_link"] = anns["is_external_link"] ? anns.external_link : nil
      anns.tags.each do |tag|
        if !tag_ids.include?(tag.id.to_s)
          tag_ids << tag.id.to_s
          tag_names << {"name_translations" => tag.name_translations}
        end
        a["tags"] << {"name_translations" => tag.name_translations}
      end
      cat = anns.category
      if (!category_ids.include?(cat.id.to_s) rescue false)
        category_ids << cat.id.to_s
        category_titles << {"title_translations" => cat.title_translations}
      end
      a["category"] = {"title_translations" => (cat.title_translations rescue {})}
      anns.bulletin_links.each do |bl|
        b = {}
        b["url"] = bl.url
        b["title_translations"] = bl.title_translations
        a["bulletin_links"] << b
      end
      anns.bulletin_files.each do |bf|
        b = {}
        b["description_translations"] = bf.description_translations
        b["title_translations"] = bf.title_translations
        b["url"] = ("#{base_url}" + bf.file.url rescue "")
        a["bulletin_files"] << b
      end
      all_anns << a
    end
    invalid_date = [first_postdate,first_deadline].compact.sort[0]
    anns = {
      "announcements" => all_anns,
      "tags" => tag_names,
      "categories" => category_titles
    }.to_json
    BulletinFeedCache.where(uid: uid,start: startdt,end: enddt,date: dt).destroy
    feed_cache = BulletinFeedCache.create(uid: uid,content: anns,start: startdt,end: enddt,date: dt,invalid_date: invalid_date)
  end
  def self.smart_convertor(text,url)
    doc = Nokogiri.HTML(text)
    doc.search('a[href]').each do |link|
      if link['href'].nil?
        link.delete 'href'
      elsif link['href'].start_with?('/')
        link['href'] = url + link['href']
      elsif link['href'].start_with?('../')
        link['href'] = url + link['href'][3..-1]
      end
    end
    doc.search('img[src]').each do |link|
      if link['src'].nil?
        link.delete 'src'
      elsif link['src'].start_with?('/')
        link['src'] = url + link['src']
      elsif link['src'].start_with?('../')
        link['src'] = url + link['src'][3..-1]
      end
    end

    return doc.css('body').inner_html
  end
end