module GovauRoutes

# File lib/govau_routes.rb, line 18
def fetch_routes(devid:, key:, fetch: nil)
  path = "/v3/routes/route_type/#{GovauConfig::ROUTE_TYPE_TRAIN}"
  url = GovauPtv.build_url(path, devid: devid, key: key)
  payload = GovauPtv.fetch_json(url, fetch: fetch)
  parse_routes(payload)
rescue StandardError
  []
end

# File lib/govau_routes.rb, line 38
def format_routes(rows)
  lines = [
    IrcFormat.report_header(
      tag: "GOVAU",
      title: "Victoria · metro train lines",
      style: STYLE_TITLE
    )
  ]

  if rows.empty?
    lines << "No train lines returned."
  else
    rows.first(GovauConfig::MAX_ROUTES).each do |row|
      lines << row[:name]
    end
  end

  count = rows.length
  footer_count = count.zero? ? "0 lines" : "#{count} lines"
  lines << IrcFormat.report_footer(footer_count, "PTV · data.gov.au")
  lines.join("\n")
end

# File lib/govau_routes.rb, line 27
def parse_routes(payload)
  Array(payload["routes"]).filter_map do |row|
    next unless row.is_a?(Hash)

    name = GovauPtv.first_present(row["route_number"], row["route_name"])
    next if name.empty?

    { route_id: row["route_id"], name: name }
  end
end