class MyCnf

# File lib/mycnf.rb, line 74
def self.compare(*cnf)
  size = cnf.size
  result = {}
  cnf.each_with_index do |c, i|
    result = _compare(c, size, i, result)
  end
  result
end

# File lib/mycnf.rb, line 69
def self.compare_files(*file_pathes)
  cnfs = file_pathes.map { |path| parse(path) }
  compare(*cnfs)
end

# File lib/mycnf.rb, line 55
def self.diff(*cnf)
  compare = compare(*cnf)
  result = {}
  compare.each do |section, params|
    params.each do |param, values|
      if values.uniq.size != 1
        result[section] ||= {}
        result[section][param] = values
      end
    end
  end
  result
end

# File lib/mycnf.rb, line 50
def self.diff_files(*file_pathes)
  cnfs = file_pathes.map { |path| parse(path) }
  diff(*cnfs)
end

# File lib/mycnf.rb, line 34
def self.generate(hash)
  result = ''
  hash.each do |section, params|
    result << %Q[[#{section.to_s}]\n]
    params.each do |param, value|
      if value == ''
        result << %Q[#{param}\n]
      else
        result << %Q[#{param} = #{value}\n]
      end
    end
    result << %Q[\n]
  end
  result.chomp
end

# File lib/mycnf.rb, line 2
def self.parse(file_path)
  cnf = {}
  section = nil
  File.read(file_path).each_line do |line|
    line.gsub!(/#.*/, '')
    line.strip!

    next if line == ''

    if /\[(.+)\]/ =~ line
      section = $1.to_sym
      next
    end

    next if section.nil?
    next unless /^([^\=]+)\=?(.*)/ =~ line
    param, value = [ $1.strip, $2.strip ]
    param = param.gsub('-', '_').to_sym

    value = case value
    when /^\d+$/; value.to_i
    when /^true$/i; true
    when /^false$/i; false
    else value
    end

    cnf[section] ||= {}
    cnf[section][param] = value
  end
  cnf
end

# File lib/mycnf.rb, line 85
def self._compare(cnf, size, index, result)
  cnf.each do |section, params|
    result[section] ||= {}
    params.each do |param, value|
      result[section][param] ||= Array.new(size)
      result[section][param][index] = value
    end
  end
  result
end