class SiteFeed
  include Mongoid::Document
  include Mongoid::Timestamps
  ModuleAppSyncFields = ["feeds_model", "feeds_uid_field", "feeds_update_callback", "feeds_time_field", "feeds_finish_callback", "feeds_update_statuses_callback"]
  field :remote_site_url
  field :merge_with_category
  field :channel_name
  field :channel_title, :localize => true
  field :channel_key
  field :feed_name, localize: true
  field :disabled, type: Boolean, default: false
  field :feed_url
  field :feed_uid
  field :feeds_model
  field :feeds_uid_field
  field :feeds_update_callback
  field :feeds_time_field, type: String, default: "postdate"
  field :feeds_finish_callback
  field :feeds_update_statuses_callback
  field :enable_notify, type: Boolean, default: false
  require 'feed_model/cache'
  require 'fileutils'
  include FeedModel::Cache
  Category.send(:include,FeedModel::Cache)
  after_create do
    self.add_notify
    crontab_list = `crontab -l`.split("\n") rescue []
    site_root = Rails.root.to_s
    if crontab_list.select{|s| s.include?(site_root) && s.include?("feeds_module:make_cache")} == []
      `(crontab -l ; echo "*/5 * * * * /bin/bash -l -c 'cd #{site_root} && bundle exec rake feeds_module:make_cache > /dev/null'") | crontab`
    end
  end
  before_destroy do
    self.remove_notify
    tmp = SiteFeedAnnc.where(feed_id: self.id)
    main_directory = File.join("#{Rails.root}","public","site_feeds")
    feed_directory = File.join(main_directory.to_s, self.id.to_s)
    FileUtils.rm_rf(feed_directory.to_s)
    if tmp.count!=0
      tmp.destroy
    end
  end
  after_save do
    if @skip_callback
      unless @skip_fix_data
        update_url = self.remote_site_url_changed?
        if self.channel_title_changed?
          self.update_channel_title(update_url)
        elsif update_url
          self.update_remote_site_url
        end
      end
    else
      self.sync_data_to_annc
    end
    @site_feed_annc = nil
  end
  scope :enabled, ->{where(:disabled => false)}
  def site_feed_annc
    @site_feed_annc ||= SiteFeedAnnc.where(:feed_id=>self.id).first
  end
  def update_channel_title(update_url=false) #update_url=true will also fix remote_site_url in data
    site_feed_annc.update_channel_title(update_url) if site_feed_annc
  end
  def update_remote_site_url
    site_feed_annc.update_remote_site_url if site_feed_annc
  end
  def sync_data_to_annc(site_feed_annc=nil)
    category_title = self.category[:title] rescue {}
    tmp_channel_title = self.channel_title_for_cache
    clone_fields =["channel_key", "merge_with_category", "remote_site_url", "feeds_model", "feeds_uid_field", "feeds_update_callback", "feeds_time_field", "feeds_update_statuses_callback"]
    (site_feed_annc ? [site_feed_annc] : SiteFeedAnnc.where(:feed_id=>self.id)).each do |tmp|
      clone_fields.each do |f|
        tmp.send("#{f}=", self.send(f))
      end
      tmp[:feed_name] = self[:feed_name]
      tmp.category_title = category_title
      tmp.channel_title = tmp_channel_title
      tmp.save
    end
  end
  def get_annc(force_refresh=false)
    main_directory = File.join("#{Rails.root}","public","site_feeds")
    feed_directory = File.join(main_directory.to_s, self.id.to_s)
    if !force_refresh && File.exists?(feed_directory)
      anns = JSON.parse(File.read(File.join(feed_directory.to_s, self.feed_uid + ".json")))[self.channel_key.pluralize] rescue []
    else
      uri = URI(self.feed_url)
      res = get_response_body(uri) rescue ''
      FileUtils.mkdir_p(feed_directory) if !File.exists?(feed_directory)
      File.open(File.join(feed_directory.to_s,self.feed_uid + ".json"),"w") do |file|
        res.force_encoding("utf-8")
        file.write(res)
      end
      anns = JSON.parse(res)[self.channel_key.pluralize] rescue []
    end
    anns
  end
  def get_response_body(uri)
    res = Net::HTTP.start(uri.host, uri.port,
                          :use_ssl => uri.scheme == 'https',
                          open_timeout: 60,read_timeout: 60,
                          verify_mode: OpenSSL::SSL::VERIFY_NONE) do |http|
      req = Net::HTTP::Get.new(uri)
      http.request(req)
    end
    if res.code == "302" ||  res.code == "301"
      location = res['Location']
      cookie = res['Set-Cookie']  
      if location[0] == "/"
          uri = URI.parse("#{uri.scheme}://#{uri.host}#{location}")
      else
          uri = URI.parse(location)
      end
      res = Net::HTTP.start(uri.host, uri.port,
                            :use_ssl => uri.scheme == 'https',
                            open_timeout: 60,read_timeout: 60,
                            verify_mode: OpenSSL::SSL::VERIFY_NONE) do |http|
        req = Net::HTTP::Get.new(uri)
        req['Cookie'] = cookie
        http.request(req)
      end
      return res.body
    else
      return res.body
    end
  end
  def category
    Category.find(self.merge_with_category) rescue nil
  end
  def channel_title_for_cache
    !self[:channel_title].to_s.empty? ? self[:channel_title] : I18n.t("feed.source")
  end
  def http_request(http, request)
    response = http.request(request)
    if response.code.to_i == 301 || response.code.to_i == 302
      location = response["location"]
      new_uri = URI(location)
      http = Net::HTTP.new(new_uri.host, new_uri.port)
      if location.include?('https')
        http.use_ssl = true
        http.verify_mode = OpenSSL::SSL::VERIFY_NONE
      end
      request.instance_variable_set(:@path, new_uri.path)
      response = http_request(http, request)
    end
    response
  end
  def add_notify
    unless self.enable_notify
      root_url = Site.first.root_url rescue ""
      if root_url.present?
        uri = URI(self.remote_site_url)
        http_req = Net::HTTP.new(uri.host, uri.port)
        if self.remote_site_url.include?('https')
          http_req.use_ssl = true
          http_req.verify_mode = OpenSSL::SSL::VERIFY_NONE
        end
        http_req.open_timeout = 10
        request = Net::HTTP::Post.new("/xhr/#{self.channel_key.pluralize}/feed_add_remote/#{self.feed_uid}", 'Content-Type' => 'application/json')
        request.body = {"url"=>root_url}.to_json
        response = http_request( http_req , request )
        if response.code.to_i == 200
          self.update(:enable_notify=>true)
        end
      end
    end
  end
  def remove_notify
    if self.enable_notify
      root_url = Site.first.root_url rescue ""
      if root_url.present?
        uri = URI(self.remote_site_url)
        http_req = Net::HTTP.new(uri.host, uri.port)
        if self.remote_site_url.include?('https')
          http_req.use_ssl = true
          http_req.verify_mode = OpenSSL::SSL::VERIFY_NONE
        end
        http_req.open_timeout = 10
        request = Net::HTTP::Post.new("/xhr/#{self.channel_key.pluralize}/feed_remove_remote/#{self.feed_uid}", 'Content-Type' => 'application/json')
        request.body = {"url"=>root_url}.to_json
        response = http_request( http_req , request )
        if response.code.to_i == 200
          self.update(:enable_notify=>false)
        end
      end
    end
  end
end