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require 'rubygems'
require 'open-uri'
require 'net/http'
require 'uri'
require 'rexml/document'

namespace "photos" do 
  
  
  desc "Find licenses on Flickr"
  task :get_licenses => [:environment] do

    key = FLICKR_KEY
    secret = FLICKR_SECRET
    flickr_url = "http://api.flickr.com/services/rest/"
    method = "flickr.photos.licenses.getInfo"  

    url = flickr_url +  "?api_key=" + key + "&method=" + method
    puts url

    response = open(url)
    doc = REXML::Document.new(response.read)
    doc.elements.each('//rsp/licenses/license') do |license|
      if license.attributes["url"] != ""
        @licence = Licence.find_by_url(license.attributes["url"])
        
        if @licence 
          puts "License already known about."
        else
          @licence = Licence.new(:url => license.attributes["url"], :name => license.attributes["name"])
          if @licence.save
            puts "Saved new license"
          else
            puts "Error saving license"
          end
        end
      end
    end
    
  end
  
  desc "Find photos on Flickr"
  task :find => [:environment] do
    key = "86c115028094a06ed5cd19cfe72e8f8b"
    secret = "d371b9edd648fa19"
    content_type = "1" # Photos only
    machine_tag_key = "openplaques:id"
  
    flickr_url = "http://api.flickr.com/services/rest/"
    method = "flickr.photos.search"  
    license = "1,2,3,4,5,6,7" # All the CC licencses that allow commercial re-use  
  
    
    url = flickr_url + "?api_key=" + key + "&method=" + method + "&license=" + license + "&content_type=" + content_type + "&machine_tags=" + machine_tag_key +  "=&extras=date_taken,owner_name,license,geo,machine_tags"
  
    new_photos_count = 0
    response = open(url)
    doc = REXML::Document.new(response.read)
    doc.elements.each('//rsp/photos/photo') do |photo|
      print "."
      $stdout.flush
    
      @photo = nil

      file_url = "http://farm" + photo.attributes["farm"] + ".static.flickr.com/" + photo.attributes["server"] + "/" + photo.attributes["id"] + "_" + photo.attributes["secret"] + "_m.jpg"
      photo_url = "http://www.flickr.com/photos/" + photo.attributes["owner"] + "/" + photo.attributes["id"] + "/"

      @photo = Photo.find_by_url(photo_url)
    
    
      if @photo
      else
        plaque_id = photo.attributes["machine_tags"][/openplaques\:id\=(\d+)/, 1] 
        
        @plaque = Plaque.find(:first, :conditions => {:id => plaque_id})
        if @plaque
          @photo = Photo.new
          @photo.plaque = @plaque
          @photo.file_url = file_url
          @photo.url = photo_url
          @photo.taken_at = photo.attributes["datetaken"]
          @photo.photographer_url = photo_url = "http://www.flickr.com/photos/" + photo.attributes["owner"] + "/"
          @photo.photographer = photo.attributes["ownername"]
          if photo.attributes["license"] == "4"
            @photo.licence = Licence.find_by_url("http://creativecommons.org/licenses/by/2.0/")
          elsif photo.attributes["license"] == "6"
            @photo.licence = Licence.find_by_url("http://creativecommons.org/licenses/by-nd/2.0/")
          elsif photo.attributes["license"] == "3"
            @photo.licence = Licence.find_by_url("http://creativecommons.org/licenses/by-nc-nd/2.0/")
          elsif photo.attributes["license"] == "2"
            @photo.licence = Licence.find_by_url("http://creativecommons.org/licenses/by-nc/2.0/")
          elsif photo.attributes["license"] == "1"
            @photo.licence = Licence.find_by_url("http://creativecommons.org/licenses/by-nc-sa/2.0/")
          elsif photo.attributes["license"] == "5"
            @photo.licence = Licence.find_by_url("http://creativecommons.org/licenses/by-sa/2.0/")
          elsif photo.attributes["license"] == "7"
            @photo.licence = Licence.find_by_url("http://www.flickr.com/commons/usage/")
          else
            puts "Couldn't find license"
          end
          if @photo.save
            new_photos_count += 1
            #puts "New photo found and saved"
          else
            puts "Error saving photo" + @photo.errors.each_full{|msg| puts msg }
          end

          if photo.attributes["latitude"] != "0" && photo.attributes["longitude"] != "0" && !@plaque.geolocated?
            puts "New geolocation found"
            @plaque.latitude = photo.attributes["latitude"]
            @plaque.longitude = photo.attributes["longitude"]
            @plaque.accuracy = 'flickr'
            if @plaque.save
              puts "New geolocation added to photo"
            else
              puts "Error adding geolocation to photo" + plaque.errors.full_messages.to_s #methods.join(" ")
            end
          end


        
        else
          #puts "Photo's machine tag doesn't match a plaque."  
        end
      end
    end
  
    puts "\n" + new_photos_count.to_s + " new photos found and saved."
  
  end
end