module FishingListFormat

# File lib/fishing_list_format.rb, line 52
def build_list_body(sites, max_bytes: RabbotConfig::PRIVMSG_CHUNK_BYTES)
  grouped = group_by_region(sites)
  REGION_ORDER.flat_map do |region|
    names = grouped[region]
    next [] if names.nil? || names.empty?

    build_region_lines(region, names, max_bytes: max_bytes)
  end
end

# File lib/fishing_list_format.rb, line 41
def build_region_lines(region, names, max_bytes: RabbotConfig::PRIVMSG_CHUNK_BYTES)
  prefix = "#{region} — "
  prefix_bytes = prefix.bytesize
  budget = [max_bytes - prefix_bytes, 20].max
  packed = ParagraphFormat.build_paragraphs(names, max_bytes: budget, separator: ", ")
  return [] if packed.empty?

  packed[0] = "#{prefix}#{packed[0]}"
  packed
end

# File lib/fishing_list_format.rb, line 32
def group_by_region(sites)
  grouped = Hash.new { |hash, key| hash[key] = [] }
  primary_sites(sites).each do |site|
    region = region_for_lat(site["LAT"])
    grouped[region] << site["PORT_NAME"]
  end
  grouped.transform_values { |names| names.sort }
end

# File lib/fishing_list_format.rb, line 24
def primary_sites(sites)
  Array(sites).select { |site| site["PS_FLAG"] == "P" }
end

# File lib/fishing_list_format.rb, line 28
def region_for_lat(lat)
  REGION_BANDS.find { |_name, max| lat.to_f > max }&.first || "South East"
end