module TheatresEventCinemas

# File lib/theatres_event_cinemas.rb, line 35
def build_movie(title_text)
  rating = nil
  title = title_text.to_s.strip
  if (match = title.match(/\s+(G|PG|M|MA15\+|R18\+|CTC)\z/i))
    rating = match[1].upcase
    title = title.sub(/\s+(G|PG|M|MA15\+|R18\+|CTC)\z/i, "").strip
  end

  { title: title, rating: rating, times: [] }
end

# File lib/theatres_event_cinemas.rb, line 72
def dedupe_times(times)
  seen = {}
  times.map { |time| normalize_time(time) }.each_with_object([]) do |time, list|
    next if time.empty? || seen[time]

    seen[time] = true
    list << time
  end
end

# File lib/theatres_event_cinemas.rb, line 55
def extract_times_for_movie(_doc, heading, movie)
  node = heading.next_element
  while node
    break if node.name.match?(/\Ah[1-6]\z/)

    text = node.text.to_s
    text.scan(TIME_PATTERN).each do |time|
      movie[:times] << normalize_time(time)
    end
    node = node.next_element
  end
end

# File lib/theatres_event_cinemas.rb, line 68
def normalize_time(time)
  time.to_s.strip.gsub(/\s+/, " ")
end

# File lib/theatres_event_cinemas.rb, line 11
def parse_sessions(html, cinema:, chain: "Event Cinemas")
  doc = Nokogiri::HTML(html.to_s)
  movies = []

  doc.css("h2, h3").each do |heading|
    title_text = heading.text.to_s.strip
    next if title_text.empty?
    next if skip_heading?(title_text)

    movie = build_movie(title_text)
    extract_times_for_movie(doc, heading, movie)
    next if movie[:times].empty?

    movie[:times] = dedupe_times(movie[:times])
    movies << movie
  end

  {
    cinema: cinema.to_s,
    chain: chain,
    movies: movies
  }
end

# File lib/theatres_event_cinemas.rb, line 46
def skip_heading?(title_text)
  lowered = title_text.downcase
  lowered.include?("filter") ||
    lowered.include?("legend") ||
    lowered.include?("sessions") ||
    lowered.include?("promotions") ||
    lowered.include?("events")
end