module BomLocationApi

# File lib/bom_location_api.rb, line 27
def autocomplete(name, fetch:)
  query = URI.encode_www_form_component(name.to_s.strip)
  data = BomApi.fetch_json("/locations/places/autocomplete?name=#{query}", fetch: fetch)
  data["candidates"] || []
end

# File lib/bom_location_api.rb, line 70
def observation_station_id(candidates, place)
  CAPITAL_STATION_IDS[place["id"]] ||
    candidates.find { |entry| entry["type"] == "bom_stn" && entry["name"].to_s.start_with?(place["name"]) }&.[]("id")&.to_i
end

# File lib/bom_location_api.rb, line 59
def pick_place(places, search_name, slug)
  return nil if places.empty?

  exact = places.find { |entry| entry["name"].casecmp?(search_name) }
  return exact if exact

  slug_name = slug.tr("-", " ")
  places.find { |entry| entry["name"].casecmp?(slug_name) } || places.first
end

# File lib/bom_location_api.rb, line 33
def resolve(location, state: nil, fetch:)
  parsed = BomForecast.parse_location(location)
  search_name = parsed[:slug].tr("-", " ")
  return nil if search_name.empty?

  state_key = state || parsed[:state]
  api_state = STATE_API[state_key] if state_key
  candidates = autocomplete(search_name, fetch: fetch)
  places = candidates.select { |entry| entry["type"] == "place" }
  places = places.select { |entry| entry["state"] == api_state } if api_state

  place = pick_place(places, search_name, parsed[:slug])
  return nil unless place

  grid = place.dig("gridcells", "forecast")
  return nil unless grid && grid["x"] && grid["y"]

  {
    id: place["id"],
    name: place["name"],
    grid: grid,
    timezone: place["timezone"],
    station_id: observation_station_id(candidates, place)
  }
end