module RulingBusesHelper
  extend self
  extend ActionView::Helpers::FormTagHelper
  extend ActionView::Helpers::FormOptionsHelper
  extend ActionView::Helpers::DateHelper
  extend ActionView::Helpers::TagHelper
  extend ActionView::Helpers::RenderingHelper
  extend ActionView::Context
  extend OrbitBasis::RenderAnywhere
  extend ActionView::Helpers::UrlHelper
  extend OrbitFormHelper
  extend Ckeditor::Helpers::FormHelper

  Setting = RulingBusSetting.first
  APP_ID = Setting.app_id
  APP_KEY = Setting.app_key
  UpdateInterval = Setting.update_interval
  Directions = I18n.available_locales.map do |locale| 
                [locale,I18n.with_locale(locale){I18n.t('ruling_bus.directions')}]
              end.to_h
  UpdateFrontInterval = Setting.update_front_interval
  UpdateRouteInterval = Setting.update_route_interval
  require 'httparty'

  include HTTParty
  base_uri 'https://ptx.transportdata.tw/MOTC/v2'
  open_timeout 3
  read_timeout 1
  format :json

  headers(
    'Content-Type'  => 'application/json',
    'Accept'        => 'application/json',
    'X-Date'        => ->{ @current_timestamp = Time.now.utc.strftime('%a, %d %b %Y %T GMT') },
    'Authorization' => ->{ authorization_header },
  )

  def authorization_header
    hmac = Base64.strict_encode64(OpenSSL::HMAC.digest('sha1', APP_KEY, "x-date: #{@current_timestamp}"))
    return %(hmac username="#{APP_ID}", algorithm="hmac-sha1", headers="x-date", signature="#{hmac}")
  end
  def self.get(url)
    super(URI.encode(url))
  end

  def get_locale
    I18n.locale.to_s=='zh_tw' ? 'Zh_tw' : 'En'
  end

  def bus_table
    get("/Bus/EstimatedTimeOfArrival/City/Taichung/151?$top=30&$format=JSON")
  end

  def get_available_cities
    begin
      if RulingBusCity.first.nil? || RulingBusCity.first.updated_at<DateTime.now-20.minutes
        response = HTTParty.get('https://ptx.transportdata.tw/MOTC/v2/Bus/api-docs/oas')
        cities = response["paths"]["/v2/Bus/EstimatedTimeOfArrival/City/{City}"]["get"]["parameters"][0]["x-enum"]
        RulingBusCity.first.nil? ? RulingBusCity.create(dict: cities) : RulingBusCity.first.update_attributes(dict: cities)
      else
        cities = RulingBusCity.first.dict
      end
    rescue => e
      puts [e,e.backtrace]
      cities = RulingBusCity.first.dict
    end 
    I18n.locale.to_s=='zh_tw' ? cities.map{|k,v| [v,k]} : cities.map{|k,v| [k.gsub(/(?!^)[A-Z]/, ' \0'),k]}
  end

  def get_route_information(city,routename,locale=nil)
    locale = get_locale if locale.nil?
    get("/Bus/Route/City/#{city}?$format=JSON&$filter=RouteName/#{locale} eq '#{routename}'")[0]
  end

  def get_arrival_name(city,routename,locale=nil)
    locale = get_locale if locale.nil?
    info = get_route_information(city,routename,locale)
    info
  end

  def get_stops_for_city(city,code,default_locale,locale=nil)
    locale = get_locale if locale.nil?
    [""] +  (get("/Bus/Stop/City/#{city}?$select=StopName&$format=JSON").collect{|v| [v['StopName'][default_locale],v['StopName'][locale]]} + get("/Bus/Stop/InterCity?$select=StopName&$filter=LocationCityCode eq '#{code}'&$format=JSON").collect{|v| [v['StopName'][default_locale],v['StopName'][locale]]}).uniq.sort
  end

  def get_location_code(city)
    get("/Bus/Station/City/#{city}?$top=1&$format=JSON")[0]["LocationCityCode"]
  end

  def mapping_bus_data(data,a,b,locale,no_dest)
    tmp = data.group_by{|v| v['RouteName']}
    bus_group = tmp.collect do |k,v|
        stops = v.each_with_index.collect{|v1,i| [v1["StopName"],v1["Direction"],i]}
        match_a = stops.select{|s,d,i| s[locale]==a}
        match_b = no_dest ? [] : stops.select{|s,d,i| s[locale]==b}
        [k[locale],match_a.collect do |s_a,d_a,i_a|
                    if !no_dest
                      mbs = match_b.collect{|s_b,d_b,i_b| i_b>i_a ? s_b : nil}.compact
                      mbs.length>0 ? [s_a,mbs[0],d_a] : nil
                    else
                      [s_a,{},d_a]
                    end
                  end.compact[0]
        ]
    end.select{|v1,v2| v2}.to_h
    bus_group.keys.group_by{|k| bus_group[k]}.map{|k,v| [k,v.sort]}
  end
  def get_bus_with_direction_from_a_to_b(city,code,a,b,default_locale,direction=nil)
    locale = default_locale
    no_dest = b.blank?
    select_fields = "RouteName,Direction,StopSequence,StopName"
    eq_sa = "(StopName/#{locale} eq '#{a}')"
    eq_sb = no_dest ? " and Direction eq #{direction}" : " or (StopName/#{locale} eq '#{b}' )"
    url = "/Bus/EstimatedTimeOfArrival/City/#{city}?$select=#{select_fields}&$filter=#{eq_sa}#{eq_sb}&$format=JSON&$orderby=Direction,StopSequence"
    url2 = "/Bus/EstimatedTimeOfArrival/InterCity?$select=#{select_fields}&$filter=#{eq_sa}#{eq_sb}&$format=JSON&$orderby=Direction,StopSequence"
    data = {bus: mapping_bus_data(self.get(url),a,b,locale,no_dest), pbus: mapping_bus_data(self.get(url2),a,b,locale,no_dest)}
  end

  def get_stop_time(bus_info,locale=nil)
    city = bus_info.city
    cache_data = bus_info.cache_data
    cache_data_bus = cache_data[:bus]
    cache_data_pbus = cache_data[:pbus]
    locale = get_locale if locale.nil?
    filters = cache_data_bus.map do |k,v|
                ("((StopName/#{locale} eq '#{k[0][locale]}') and Direction eq #{k[2]} and " +
                '(' + v.map{|r| "RouteName/#{bus_info.locale} eq '#{r}'"}.join(' or ') + '))')
              end.join(' or ')
    url = "/Bus/EstimatedTimeOfArrival/City/#{city}?$select=Direction,RouteName,NextBusTime&$filter=#{filters}&$format=JSON&$orderby=RouteName/#{locale}"
    begin
      bus_data = JSON.parse(self.get(url).body)
    rescue Errno::EHOSTUNREACH, Net::ReadTimeout, Net::OpenTimeout
      return nil
    end
    if bus_data.class==Hash
      return nil
    end
    if !cache_data_pbus.blank?
      filters = cache_data_pbus.map do |k,v|
                  ("((StopName/#{locale} eq '#{k[0][locale]}') and Direction eq #{k[2]} and " +
                  '(' + v.map{|r| "RouteName/#{bus_info.locale} eq '#{r}'"}.join(' or ') + '))')
                end.join(' or ')
      url2 = "/Bus/EstimatedTimeOfArrival/InterCity?$select=Direction,RouteName,NextBusTime&$filter=#{filters}&$format=JSON&$orderby=RouteName/#{locale}"
      begin
        pbus_data = JSON.parse(self.get(url2).body)
      rescue Errno::EHOSTUNREACH, Net::ReadTimeout, Net::OpenTimeout
        pbus_data = []
      end
    else
      pbus_data = []
    end
    if pbus_data.class==Hash
      bus_data
    else
      bus_data + pbus_data
    end
  end
  
  def get_input_name
    "ruling_bus_info"
  end
  def create_lang_panel(field)
    tmp2 = content_tag(:div,:class => 'btn-group', :data=>{:toggle=>"buttons-radio"}) do
      I18n.available_locales.collect do |key|
        link_entry_ary = ["##{field}","_#{key}"]
        link_entry = link_entry_ary.join
        link_to(I18n.t(key),link_entry,:data=>{:toggle=>"tab"},:class=>"btn #{(key == I18n.locale ?  "active" : nil)}",:for=>key)
      end.join.html_safe
    end
  end
  def multiple_lang_tag(index1,type_of_tag,field,value=nil,custom_options={},combine_element='',exteral_options={},sortable=false)
    if !index1.nil?
      all_field = (get_input_name + "[#{index1}][#{field}][parant]").gsub(/\[/,'_').gsub(/\]/,'')
    else
      all_field = (get_input_name + "[#{field}][parant]").gsub(/\[/,'_').gsub(/\]/,'')
    end
    tmp = (I18n.available_locales.collect do |locale|
      active_flag = ((locale == I18n.locale) ? ' in active' : '')
      content_tag(:div,:class => "tab-content fade#{active_flag}",:id=>"#{all_field}_#{locale}") do
        value_locale = value[locale.to_s] rescue nil
        if !index1.nil?
          self.__send__("#{type_of_tag}_tag","#{get_input_name}[#{index1}][#{field}][#{locale}]",value_locale,custom_options)
        else
          self.__send__("#{type_of_tag}_tag","#{get_input_name}[#{field}][#{locale}]",value_locale,custom_options)
        end
      end
    end.join + create_lang_panel(all_field)).html_safe + combine_element
  
    if sortable
      if exteral_options['style'].nil?
        exteral_options['style'] = 'display: flex;align-items: center;flex-wrap: nowrap;'
      else
        exteral_options['style'] = exteral_options['style'] + 'display: flex;align-items: center;flex-wrap: nowrap;'
      end
      content_tag(:div,{:class => "tab-panel border"}.merge(exteral_options)) do
        ("<i class=\"icons-list-2\" style=\"cursor: grab;font-size: x-large;\"></i>" +content_tag(:div) do
          tmp
        end).html_safe
      end
    else 
      content_tag(:div,{:class => "tab-panel"}.merge(exteral_options)) do
        tmp
      end
    end
  end
end