class Gem::Resolver::Stats

def backtracking!
  @backtracking += 1
end

def display
  $stdout.puts "=== Resolver Statistics ==="
  $stdout.printf PATTERN, "Max Depth", @max_depth
  $stdout.printf PATTERN, "Total Requirements", @requirements
  $stdout.printf PATTERN, "Max Requirements", @max_requirements
  $stdout.printf PATTERN, "Backtracking #", @backtracking
  $stdout.printf PATTERN, "Iteration #", @iterations
end

def initialize
  @max_depth = 0
  @max_requirements = 0
  @requirements = 0
  @backtracking = 0
  @iterations = 0
end

def iteration!
  @iterations += 1
end

def record_depth(stack)
  if stack.size > @max_depth
    @max_depth = stack.size
  end
end

def record_requirements(reqs)
  if reqs.size > @max_requirements
    @max_requirements = reqs.size
  end
end

def requirement!
  @requirements += 1
end