require "rubygems"
require "ferret"
include Ferret
include Ferret::Index

index = Index.new()

index << { :title => "a matching document", :age => 100}
index << { :title => "another matching document", :age => 2}
index.optimize

filter_proc = lambda do |doc_id, score, searcher| 
  age = searcher[doc_id][:age].to_i
  1.0/age
end

# Output:
# | max_score: 0.0615548193454742
# | 0 => 0.061555: a matching document
# | 1 => 0.049244: another matching document
# Expected:
# | doc0 gets a scale of 0.01 from filter_proc, 
# | doc1 gets 0.5
# | Why is the second document not first in resultlist?
puts "Test 1"
docs = index.search("matching", :filter_proc => filter_proc)
puts "max_score: " + docs.max_score.to_s
docs.hits.each { |hit|
  puts "%i => %f: %s" % [hit.doc, hit.score, index[hit.doc][:title]]
}


simple_proc = lambda do |doc_id, score, searcher| 
  true
end

# Output:
# | max_score: 0.0
# | 1 => 0.000000: another matching document
# Expected:
# | score|max_score > 0
# | This works when removing the filter_proc or the "+" before the "age:2"
puts "Test 2"
docs = index.search("+matching +age:2", :filter_proc => simple_proc)
puts "max_score: " + docs.max_score.to_s
docs.hits.each { |hit|
  puts "%i => %f: %s" % [hit.doc, hit.score, index[hit.doc][:title]]
}