# frozen_string_literal: true

require "oj"
require "roda"

require "versions/v1/currency_names"
require "versions/v1/query"
require "versions/v1/quote/end_of_day"
require "versions/v1/quote/interval"

module Versions
  class V1 < Roda
    ROOT_PAYLOAD = {
      version: "v1",
      status: "frozen",
      openapi: "/v1/openapi.json",
      docs: "https://frankfurter.dev",
    }.freeze

    plugin :json,
      content_type: "application/json; charset=utf-8",
      serializer: ->(o) { Oj.dump(o, mode: :compat) }

    plugin :caching
    plugin :indifferent_params
    plugin :params_capturing
    plugin :halt
    plugin :error_handler do |error|
      request.halt(422, { message: error.message })
    end

    route do |r|
      response.cache_control(public: true, max_age: 86400)

      r.is { ROOT_PAYLOAD }
      r.root { ROOT_PAYLOAD }

      r.is(/latest|current/) do
        r.params["date"] = Date.today.to_s
        quote = quote_end_of_day(r)
        r.etag(quote.cache_key)

        quote.formatted
      end

      r.is(/(\d{4}-\d{2}-\d{2})/) do
        r.params["date"] = r.params["captures"].first
        quote = quote_end_of_day(r)
        r.etag(quote.cache_key)

        quote.formatted
      end

      r.is(/(\d{4}-\d{2}-\d{2})\.\.(\d{4}-\d{2}-\d{2})?/) do
        r.params["start_date"] = r.params["captures"].first
        r.params["end_date"] = r.params["captures"][1] || Date.today.to_s
        quote = quote_interval(r)
        r.etag(quote.cache_key)

        quote.formatted
      end

      r.is("currencies") do
        currency_names = CurrencyNames.new
        r.etag(currency_names.cache_key)

        currency_names.formatted
      end
    end

    private

    def quote_end_of_day(request)
      query = Query.build(request.params)
      quote = Quote::EndOfDay.new(**query)
      quote.perform
      request.halt(404, { message: "not found" }) if quote.not_found?

      quote
    end

    def quote_interval(request)
      query = Query.build(request.params)
      quote = Quote::Interval.new(**query)
      quote.perform
      request.halt(404, { message: "not found" }) if quote.not_found?

      quote
    end
  end
end