#--
# Copyright (c) 2010-2011 Michael Berkovich
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#++

module Tr8n
  module ActionViewExtension
    extend ActiveSupport::Concern
    module InstanceMethods
      
      # generates translations json for client sdk
      def tr8n_translations_js_tag(opts = {})
        html = []
        html << "<script>"

        var_name = opts[:id] || :tr8n_translations

        source_names = opts[:sources] || [opts[:source]]
        sources = Tr8n::TranslationSource.find(:all, :conditions => ["source in (?)", source_names])
        source_ids = sources.collect{|source| source.id}

        if source_ids.empty?
          conditions = ["1=2"]
        else
          conditions = ["(id in (select distinct(translation_key_id) from tr8n_translation_key_sources where translation_source_id in (?)))"]
          conditions << source_ids.uniq
        end

        translations = []
        Tr8n::TranslationKey.find(:all, :conditions => conditions).each_with_index do |tkey, index|
          trn = tkey.translate(Tr8n::Config.current_language, {}, {:api => true})
          translations << trn 
        end

        html << "var #{var_name} = #{translations.to_json};"

        html << "</script>"
        html.join('').html_safe
      end

      # translation functions
      def tr(label, desc = "", tokens = {}, options = {})
        if desc.is_a?(Hash)
          options = desc
          tokens  = options[:tokens] || {}
          desc    = options[:context] || ""
        end

        begin
          url     = request.url
          host    = request.env['HTTP_HOST']
          source  = "#{controller.class.name.underscore.gsub("_controller", "")}/#{controller.action_name}"
        rescue
          source = self.class.name
          url = nil
          host = 'localhost'
        end

        options.merge!(:source => source) unless options[:source]
        options.merge!(:caller => caller)
        options.merge!(:url => url)
        options.merge!(:host => host)

        unless Tr8n::Config.enabled?
          return Tr8n::TranslationKey.substitute_tokens(label, tokens, options)
        end

        Tr8n::Config.current_language.translate(label, desc, tokens, options)
      end

      # for translating labels
      def trl(label, desc = "", tokens = {}, options = {})
        tr(label, desc, tokens, options.merge(:skip_decorations => true))
      end

      def tr8n_options_for_select(options, selected = nil, description = nil, lang = Tr8n::Config.current_language)
        options_for_select(options.tro(description), selected)
      end

      def tr8n_phrases_link_tag(search = "", phrase_type = :without, phrase_status = :any)
        return unless Tr8n::Config.enabled?
        return if Tr8n::Config.current_language.default?
        return unless Tr8n::Config.open_registration_mode? or Tr8n::Config.current_user_is_translator?
        return unless Tr8n::Config.current_translator.enable_inline_translations?

        link_to(image_tag("tr8n/translate_icn.gif", :style => "vertical-align:middle; border: 0px;", :title => search), 
               :controller => "/tr8n/phrases", :action => :index, 
               :search => search, :phrase_type => phrase_type, :phrase_status => phrase_status).html_safe
      end

      def tr8n_dir_attribute_tag
        "dir='<%=Tr8n::Config.current_language.dir%>'".html_safe
      end

      def tr8n_splash_screen_tag
        html = "<div id='tr8n_splash_screen' style='display:none'>"
        html << (render :partial => Tr8n::Config.splash_screen)
        html << "</div>"
        html.html_safe
      end

      def tr8n_language_flag_tag(lang = Tr8n::Config.current_language, opts = {})
        return "" unless Tr8n::Config.enable_language_flags?
        html = image_tag("tr8n/flags/#{lang.flag}.png", :style => "vertical-align:middle;", :title => lang.native_name)
        html << "&nbsp;".html_safe 
        html.html_safe
      end

      def tr8n_language_name_tag(lang = Tr8n::Config.current_language, opts = {})
        show_flag = opts[:flag].nil? ? true : opts[:flag]
        name_type = opts[:name].nil? ? :full : opts[:name] # :full, :native, :english, :locale
        linked = opts[:linked].nil? ? true : opts[:linked] 

        html = "<span style='white-space: nowrap'>"
        html << tr8n_language_flag_tag(lang, opts) if show_flag

        name = case name_type
          when :native  then lang.native_name
          when :english then lang.english_name
          when :locale  then lang.locale
          else lang.full_name
        end

        if linked
          html << link_to(name.html_safe, :controller => "/tr8n/language", 
                  :action => :switch, :language_action => :switch_language, 
                  :locale => lang.locale,
                  :source_url => opts[:source_url])
        else    
          html << name
        end

        html << "</span>"
        html.html_safe
      end

      def tr8n_language_selector_tag(opts = {})
        opts[:lightbox] ||= false
        opts[:style] ||= "color:#1166bb;"
        opts[:show_arrow] ||= true
        opts[:arrow_style] ||= "font-size:8px;"
        render(:partial => '/tr8n/common/language_selector', :locals => {:opts => opts})    
      end

      def tr8n_language_strip_tag(opts = {})
        opts[:flag] = opts[:flag].nil? ? false : opts[:flag]
        opts[:name] = opts[:name].nil? ? :native : opts[:name] 
        opts[:linked] = opts[:linked].nil? ? true : opts[:linked] 
        opts[:javascript] = opts[:javascript].nil? ? false : opts[:javascript] 

        render(:partial => '/tr8n/common/language_strip', :locals => {:opts => opts})    
      end

      def tr8n_language_table_tag(opts = {})
        opts[:cols] = opts[:cols].nil? ? 4 : opts[:cols]
        opts[:col_size] = opts[:col_size].nil? ? "300px" : opts[:col_size]
        render(:partial => '/tr8n/common/language_table', :locals => {:opts => opts.merge(:name => :english)})    
      end

      def tr8n_translator_login_tag(opts = {})
        opts[:class] ||= 'tr8n_right_horiz_list'
        render(:partial => '/tr8n/common/translator_login', :locals => {:opts => opts})    
      end

      def tr8n_flashes_tag(opts = {})
        render(:partial => '/tr8n/common/flashes', :locals => {:opts => opts})    
      end

      def tr8n_scripts_tag(opts = {})
        render(:partial => '/tr8n/common/scripts', :locals => {:opts => opts})    
      end

      def tr8n_client_sdk_scripts_tag(opts = {})
        opts[:default_source] ||= "application"
        opts[:scheduler_interval] ||= 5000

        opts[:enable_inline_translations] = (Tr8n::Config.current_user_is_translator? and Tr8n::Config.current_translator.enable_inline_translations? and (not Tr8n::Config.current_language.default?))
        opts[:default_decorations]        = Tr8n::Config.default_decoration_tokens
        opts[:default_tokens]             = Tr8n::Config.default_data_tokens
        opts[:rules]                      = { 
          :number => Tr8n::Config.rules_engine[:numeric_rule],      :gender => Tr8n::Config.rules_engine[:gender_rule],
          :list   => Tr8n::Config.rules_engine[:gender_list_rule],  :date   => Tr8n::Config.rules_engine[:date_rule]
        }

        html = [javascript_include_tag("/tr8n/javascripts/tr8n_client_sdk.js")]
        html << "<script>"
        html << "function initializeTr8nProxy() {"
        html << "    tr8nProxy = new Tr8n.Proxy(#{opts.to_json});"
    #    html << "   Tr8n.Utils.addEvent(window, 'load', function() {"
    #    html << "       tr8nProxy = new Tr8n.Proxy(#{opts.to_json});"
    #    html << "    });"
        html << "}"
        html << "initializeTr8nProxy();"
        html << "</script>"
        html.join("\n").html_safe
      end

      def tr8n_translator_rank_tag(translator, rank = nil)
        return "" unless translator

        rank ||= translator.rank || 0

        html = "<span dir='ltr'>"
        1.upto(5) do |i|
          if rank > i * 20 - 10  and rank < i * 20  
            html << image_tag("tr8n/rating_star05.png")
          elsif rank < i * 20 - 10 
            html << image_tag("tr8n/rating_star0.png")
          else
            html << image_tag("tr8n/rating_star1.png")
          end 
        end
        html << "</span>"
        html.html_safe    
      end

      def tr8n_help_icon_tag(filename = "index")
        link_to(image_tag("tr8n/help.png", :style => "border:0px; vertical-align:middle;", :title => trl("Help")), {:controller => "/tr8n/help", :action => filename}, :target => "_new").html_safe
      end

      def tr8n_help_link(text, opts = {})
        filename = opts[:filename].nil? ? text.downcase.gsub(' ', '_') : opts[:filename] 
        classname = "tr8n_selected" if filename == controller.action_name
        link_to(text, { :controller => "/tr8n/help", :action => filename }, :class => classname).html_safe
      end

      def tr8n_spinner_tag(id = "spinner", label = nil, cls='spinner')
        html = "<div id='#{id}' class='#{cls}' style='display:none'>"
        html << image_tag("tr8n/spinner.gif", :style => "vertical-align:middle;")
        html << " #{trl(label)}" if label
        html << "</div>"
        html.html_safe
      end

      def tr8n_toggler_tag(content_id, label = "", open = true)
        html = "<span id='#{content_id}_open' "
        html << "style='display:none'" unless open
        html << ">"
        html << link_to_function("#{image_tag("tr8n/arrow_down.gif", :style=>'text-align:center; vertical-align:middle')} #{label}".html_safe, "Tr8n.Effects.hide('#{content_id}_open'); Tr8n.Effects.show('#{content_id}_closed'); Tr8n.Effects.blindUp('#{content_id}');", :style=> "text-decoration:none")
        html << "</span>" 
        html << "<span id='#{content_id}_closed' "
        html << "style='display:none'" if open
        html << ">"
        html << link_to_function("#{image_tag("tr8n/arrow_right.gif", :style=>'text-align:center; vertical-align:middle')} #{label}".html_safe, "Tr8n.Effects.show('#{content_id}_open'); Tr8n.Effects.hide('#{content_id}_closed'); Tr8n.Effects.blindDown('#{content_id}');", :style=> "text-decoration:none")
        html << "</span>" 
        html.html_safe
      end  

      def tr8n_sitemap(sections, splitters, options = {})
        html = ""
        html << "<table style='width:100%'>"
        html << "<tr>"
        splitters.each do |splitter| 
          html << "<td style='vertical-align:top; width:" << (100 / splitters.size).to_s << "%;'>"
          html << generate_sitemap(sections[splitter.first..splitter.last], options)      
          html << "</td>"
        end 
        html << "</tr>"
        html << "</table>"
        html.html_safe
      end

      def tr8n_breadcrumb_tag(source = nil, opts = {})
        source ||= "#{controller.class.name.underscore.gsub("_controller", "")}/#{controller.action_name}" 
        section = Tr8n::SiteMap.section_for_source(source)
        return "" unless section
        opts[:separator] ||= " >> "
        opts[:min_elements] ||= 1
        opts[:skip_root] ||= opts[:skip_root].nil? ? false : opts[:skip_root]

        links = section.parents.collect{|node| link_to(node.title(params), node.link(params))}
        return "" if links.size <= opts[:min_elements]

        links.delete(links.first) if opts[:skip_root]
        links.unshift(link_to(opts[:root].first, opts[:root].last)) if opts[:root]

        html = "<div id='tr8n_breadcrumb' class='tr8n_breadcrumb'>"
        html << links.join(opts[:separator])
        html << '</div>'    
        html.html_safe
      end

      def tr8n_user_tag(translator, options = {})
        return "Deleted Translator" unless translator

        if options[:linked]
          link_to(translator.name, translator.link).html_safe
        else
          translator.name
        end
      end

      def tr8n_user_mugshot_tag(translator, options = {})
        if translator and !translator.mugshot.blank?
          img_url = translator.mugshot
        else
          img_url = Tr8n::Config.silhouette_image
        end

        img_tag = "<img src='#{img_url}' style='width:48px'>".html_safe

        if translator and options[:linked]
          link_to(img_tag, translator.link).html_safe
        else  
          img_tag.html_safe
        end
      end  

      def tr8n_will_paginate(collection = nil, options = {})
        will_paginate(collection, options.merge(:previous_label => tr("&laquo; Previous", "Previous entries in a list", {}, options), 
                                                :next_label => tr("Next &raquo;", "Next entries in a list", {}, options))).html_safe
      end

      def tr8n_page_entries_info(collection, options = {})
        entry_name = options[:entry_name] || (collection.empty? ? 'entry' : collection.first.class.name.underscore.sub('_', ' '))

        if collection.total_pages < 2
          case collection.size
            when 0
              tr("None found", "Paginator no entries message", {}, options)
            when 1
              tr("Displaying [bold: 1] #{entry_name}", "Paginator one page message", {}, options)
            else
              tr("Displaying [bold: all {count}] #{entry_name.pluralize}", "Paginator all entries message", {:count => collection.size}, options)
          end
        else
          tr("Displaying #{entry_name.pluralize} [bold: {start_num} - {end_num}] of [bold: {total_count}] in total", 
             "Paginator custom message", {
                :start_num    => collection.offset + 1,
                :end_num      => collection.offset + collection.length,
                :total_count  => collection.total_entries
             }, options
          )
        end
      end

      def tr8n_select_month(date, options = {}, html_options = {})
        month_names = options[:use_short_month] ? Tr8n::Config.default_abbr_month_names : Tr8n::Config.default_month_names
        select_month(date, options.merge(
          :use_month_names => month_names.collect{|month_name| Tr8n::Language.translate(month_name, options[:description] || "Month name")} 
        ), html_options)
      end

      def tr8n_with_options_tag(opts, &block)
        Thread.current[:tr8n_block_options] = opts
        if block_given?
          ret = capture(&block) 
        end
        Thread.current[:tr8n_block_options] = {}
        ret
      end

      def tr8n_button_tag(label, function, opts = {})
        link_to_function("<span>#{label}</span>".html_safe, function, :class => "tr8n_grey_button tr8n_pcb")    
      end

    private

      def generate_sitemap(sections, options = {})
        html = "<ul class='section_list'>"
        sections.each do |section|
          html << "<li class='section_list_item'>" 
          html << "<a href='/tr8n/phrases/index?section_key=#{section.key}'>" << tr(section.label, section.description) << "</a>"
          html << "<a href='" << section.data[:link] << "' target='_new'><img src='/assets/tr8n/bullet_go.png' style='border:0px; vertical-align:middle'></a>" if section.data[:link]

          if section.children.size > 0
            html << generate_sitemap(section.children, options)
          end  
          html << "</li>"
        end
        html << "</ul>"
        html.html_safe
      end      
      
    end
  end
end