# lib/enrich.rb
# Per-row enrichment called right after each DB.upsert:
#  1. Geocode (address_std, street/locality/state/postcode, lat/lng) via Google Maps
#  2. Property lookup (property_id, title_reference) via LOOKUP_URL service
#
# Schema is owned by DB.ensure_table! (new tables) and lib/migrate.rb (existing tables).
# Scrapers only need to call DB.ensure_table! — no separate ensure_extra_columns! required.

require "json"
require "net/http"
require "uri"
require_relative "./db"
require_relative "./geocode"
require_relative "./log"

LOOKUP_URL = ENV["LOOKUP_URL"] # e.g. http://web/list_lookup.php

def http_post_json(url, payload, timeout: 15)
  uri = URI.parse(url)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = (uri.scheme == "https")
  http.read_timeout = timeout
  http.open_timeout = timeout
  req = Net::HTTP::Post.new(uri.request_uri)
  req["Content-Type"] = "application/json"
  req.body = JSON.generate(payload)
  res = http.request(req)
  raise "HTTP #{res.code}" unless res.is_a?(Net::HTTPSuccess)
  JSON.parse(res.body)
rescue JSON::ParserError
  {}
end

# Call this right after DB.upsert in each scraper:
#   enrich_after_upsert!(table: TABLE, council_reference: ref, address: addr)
def enrich_after_upsert!(table:, council_reference:, address:)
  DB.validate_table_name!(table)
  esc = DB.client.escape(table)
  sel = DB.client.prepare(
    "SELECT id, address, address_std, lat, lng, property_id, title_reference " \
    "FROM `#{esc}` WHERE council_reference = ? AND address = ? LIMIT 1"
  )
  row = sel.execute(council_reference, address).first
  return unless row

  # 1) Geocode if missing lat/lng or normalised address
  if row["lat"].nil? || row["lng"].nil? || row["address_std"].to_s.strip.empty?
    begin
      geo = Geocode.format_au(row["address"])
      Geocode.update_da_row!(
        table:             table,
        council_reference: council_reference,
        orig_address:      row["address"],
        geo:               geo
      )
      Log.debug "enrich", "geocoded #{table} #{council_reference}"
      row = sel.execute(council_reference, address).first
    rescue StandardError => e
      Log.warn "enrich", "geocode failed #{table} #{council_reference}: #{e.class} #{e.message}"
    end
  end

  # 2) Property lookup — only if coords exist and pid/title are missing
  need_pid   = row["property_id"].to_s.strip.empty?
  need_title = row["title_reference"].to_s.strip.empty?
  if LOOKUP_URL && row["lat"] && row["lng"] && (need_pid || need_title)
    begin
      resp = http_post_json(LOOKUP_URL, { lat: row["lat"], lng: row["lng"] })
      if resp["ok"]
        pid   = (resp["pid"]      || "").to_s
        title = (resp["title_id"] || "").to_s
        upd = DB.client.prepare(
          "UPDATE `#{esc}` SET " \
          "property_id     = COALESCE(?, property_id), " \
          "title_reference = COALESCE(?, title_reference) " \
          "WHERE council_reference = ? AND address = ?"
        )
        upd.execute(
          pid.empty?   ? nil : pid,
          title.empty? ? nil : title,
          council_reference, address
        )
        Log.debug "enrich", "lookup ok #{table} #{council_reference} pid=#{pid} title=#{title}"
      else
        Log.warn "enrich", "lookup error #{table} #{council_reference}: #{resp["error"]}"
      end
    rescue StandardError => e
      Log.warn "enrich", "lookup failed #{table} #{council_reference}: #{e.class} #{e.message}"
    end
  end
end