# frozen_string_literal: true

require_relative "nuva/version"
require_relative "nuva/NuvaDatabase_pb"
require_relative "nuva/repository"
require_relative "nuva/queries"
require "net/http"
require "json"
require "ostruct"

module Nuva
  class Nuva
    attr_reader :repositories
    attr_reader :queries

    def initialize(db)
      @db = db

      @repositories = OpenStruct.new
      @repositories.vaccines = VaccineRepository.new db.vaccines
      @repositories.valences = ValenceRepository.new db.valences
      @repositories.diseases = DiseaseRepository.new db.diseases
      @repositories.freeze

      @queries = OpenStruct.new
      @queries.valences_by_vaccine =
        ::Nuva::Queries::ValencesByVaccineQuery.new @repositories
      @queries.vaccines_by_valence =
        ::Nuva::Queries::VaccinesByValenceQuery.new @repositories
      @queries.vaccines_by_disease =
        ::Nuva::Queries::VaccinesByDiseaseQuery.new @repositories
      @queries.valences_by_disease =
        ::Nuva::Queries::ValencesByDiseaseQuery.new @repositories
      @queries.diseases_by_vaccine =
        ::Nuva::Queries::DiseasesByVaccineQuery.new @repositories
      @queries.diseases_by_valence =
        ::Nuva::Queries::DiseasesByValenceQuery.new @repositories
      @queries.vaccine_fuzzy_search =
        ::Nuva::Queries::VaccineFuzzySearchQuery.new @repositories
      @queries.lookup_vaccine_by_code =
        ::Nuva::Queries::LookupVaccineByCodeQuery.new @repositories
      @queries.lookup_equivalent_vaccines =
        ::Nuva::Queries::LookupEquivalentVaccinesQuery.new @repositories
      @queries.lookup_generalized_vaccines =
        ::Nuva::Queries::LookupGeneralizedVaccinesQuery.new @repositories,
        @queries.valences_by_vaccine
      @queries.all_nomenclatures =
        ::Nuva::Queries::AllNomenclaturesQuery.new @repositories
      @queries.all_code_by_nomenclature =
        ::Nuva::Queries::AllCodeByNomenclatureQuery.new @repositories
      @queries.freeze
    end

    def version
      @db.version
    end

    def inspect
      "#<Nuva::Nuva version=#{version.major}.#{version.minor}.#{version.patch} diseaseCount=#{repositories.diseases.all.count} vaccineCount=#{repositories.vaccines.all.count} valenceCount=#{repositories.valences.all.count}>"
    end

    LATEST_VERSION_URI =
      URI("https://cdnnuva.mesvaccins.net/versions/last.json")

    def self.load(lang: "en", hash: nil)
      ::Net::HTTP.start(
        LATEST_VERSION_URI.host,
        LATEST_VERSION_URI.port,
        use_ssl: LATEST_VERSION_URI.scheme == "https"
      ) do |http|
        # Fetch version manifest if necessary
        hash ||= fetch_latest_version_hash(http:)

        dump_uri = LATEST_VERSION_URI.dup
        dump_uri.path = "/proto/#{hash}_en.db"
        response = http.get(dump_uri)
        ::Nuva::Nuva.new(::Nuva::NuvaDatabase.decode(response.body))
      end
    end

    def self.fetch_latest_version_hash(http: Net::HTTP)
      response = http.get(LATEST_VERSION_URI)
      JSON.parse(response.body)["dump_hash"]
    end

    def self.load_from_file(path)
      Nuva.new(NuvaDatabase.decode(File.read(path)))
    end
  end
end