module Sungemm

# File lib/sungemm/methods.rb, line 27
def self.count(array)
  h = Hash.new(0)
  array.each { |el| h[el] += 1 }
  h
end

# File lib/sungemm/methods.rb, line 33
def self.even_sum(arr)
  arr.each_with_object([]) do |item, obj|
    if !item.nil? && item.length.even?
      obj << item.reverse
    end
  end
end

# File lib/sungemm/methods.rb, line 5
def self.fibo_finder(n)
  if (0..1).include?(n)
    n
  else
    fibo_finder(n - 2) + fibo_finder(n - 1)
  end
end

# File lib/sungemm/methods.rb, line 41
def self.join_params(link, url_parameters)
  link + "?" + url_parameters.map { |(k, v)| "#{k}=#{v}" }.join("&")
end

# File lib/sungemm/methods.rb, line 102
def self.key_for_min_value(hash)
  hash.key(hash.values.min)
end

# File lib/sungemm/methods.rb, line 13
def self.longest_palindrome(str)
  len = str.length
  while len > 0
    offset = str.length - len
    while offset > 0
      substr = str[offset, len]
      return substr if substr == substr.reverse
      offset -= 1
    end
    len -= 1
  end
  ""
end

# File lib/sungemm/methods.rb, line 45
def self.pretty_date(date)
  month_strings = %w(January February March April May June July August
                     Sepetember October November December)
  invalid_date = false
  case
  when m = /\A(\d{2})-(\d{2})-(\d{4})\z/.match(date)
    year = m[3]
    month_int = m[1].to_i - 1
    month = month_strings[month_int][0, 3]
    day = m[2]
  when m = /\A(\w+)[ ](\d{1,2}),[ ](\d{4})\z/.match(date)
    month_match = m[1]
    if !month_strings.include?(month_match)
      invalid_date = true
    else
      month = month_match[0, 3]
      year = m[3]
      day = m[2]
    end
  when m = /\A(\d{4})-(\d{2})-(\d{2})\z/.match(date)
    year = m[1]
    month_int = m[2].to_i - 1
    month = month_strings[month_int][0, 3]
    day = m[3]
  when m = %r{\A(\d{1,2})/(\d{2})/(\d{4})\z}.match(date)
    year = m[3]
    month_int = m[1].to_i - 1
    month = month_strings[month_int][0, 3]
    day = m[2]
  else
    invalid_date = true
  end
  raise "Invalid date format" if invalid_date
  "#{month} #{day}, #{year}"
end

# File lib/sungemm/methods.rb, line 81
def self.random_boolean
  rand(2) == 1
end

# File lib/sungemm/methods.rb, line 85
def self.reverse_each_word(sentence)
  sentence.split(" ").map { |x| x.reverse }.join(" ")
end

# File lib/sungemm/methods.rb, line 89
def self.separate_with_comma(number)
  str = number.to_s
  if str.length > 3
    str.gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1,")
  else
    str
  end
end

# File lib/sungemm/methods.rb, line 98
def self.simple_sub(str, pattern, replace)
  str.gsub(pattern, pattern => replace)
end