class ChristianCalendar

# File lib/christian_calendar.rb, line 13
def initialize(year=Time.now.year)
  @year = year    
end

# File lib/christian_calendar.rb, line 90
def advent_sunday()    
  Chronic.parse('sunday', now: christmas).to_date - WEEK * 4
end

# File lib/christian_calendar.rb, line 74
def ascension_day()
  Easter.ascension_day(@year)
end

# File lib/christian_calendar.rb, line 27
def ash_wednesday()
  Easter.ash_wednesday(@year)
end

# File lib/christian_calendar.rb, line 94
def christmas(year=@year)
  Date.new(year, 12, 25)
end

# File lib/christian_calendar.rb, line 49
def easter_sunday()
  Easter.easter(@year)
end

# File lib/christian_calendar.rb, line 17
def epiphany()
  christmas(@year - 1) + 12
end

# File lib/christian_calendar.rb, line 45
def good_friday()
  Easter.good_friday(@year)
end

# File lib/christian_calendar.rb, line 31
def mothering_sunday()
  Chronic.parse('sunday', now: ash_wednesday).to_date + WEEK * 3
end

# File lib/christian_calendar.rb, line 41
def palm_sunday()
  Easter.palm_sunday(@year)
end

# File lib/christian_calendar.rb, line 78
def pentecost()
  Easter.pentecost(@year)
end

# File lib/christian_calendar.rb, line 98
def query(s)
  key = s.downcase.gsub(/\W+/,'_').to_sym
  self.to_h[key]
end

# File lib/christian_calendar.rb, line 84
def st_andrews_day(year=@year)
  Date.new(year, 11, 30)
end

# File lib/christian_calendar.rb, line 21
def st_davids_day(year=@year)
  Date.new(year, 3, 1)
end

# File lib/christian_calendar.rb, line 35
def st_patricks_day(year=@year)
  Date.new(year, 3, 17)
end

# File lib/christian_calendar.rb, line 103
def to_h
  a = %i(epiphany st_davids_day ash_wednesday mothering_sunday)\
  + %i(st_patricks_day palm_sunday good_friday easter easter_sunday)\
  + %i(whit_sunday trinity_sunday ascension_day pentecost st_andrews_day)\
  + %i(advent_sunday christmas)

  a.inject({}){|r,day| r.merge(day => method(day).call)}
end

# File lib/christian_calendar.rb, line 60
def to_s()
  
  a = to_h.sort_by{|k, v| v.to_datetime}.map do |k,v| 
    label = k.to_s.sub(/s(?=_)/,"'s").gsub('_', ' ').split.map(&:capitalize).join(' ')
    "%+16s: %s" % [label,v.strftime("%d-%b-%Y")]
  end
  
  a.join("\n")
end

# File lib/christian_calendar.rb, line 70
def trinity_sunday()
  Chronic.parse('sunday', now: pentecost).to_date
end

# File lib/christian_calendar.rb, line 55
def whit_sunday()
  Chronic.parse('sunday', \
      now: Chronic.parse('15 May', now: Time.local(@year,1,1))).to_date
end