# frozen_string_literal: true

require 'faraday'
require 'multi_json'
require 'truelayer/configuration'
require 'truelayer/errors'
require 'truelayer/version'
require 'truelayer/token'
require 'truelayer/auth_link'
require 'truelayer/provider'

module Truelayer
  class AuthenticationRepository
    def generate_direct_bank_link(provider_id:, consent_id:, redirect_uri:, scopes:, state: nil, tracking_id: nil, data_use_description: nil)
      params = {
        response_type: 'code',
        client_id: Truelayer.configuration.client_id,
        provider_id: provider_id,
        redirect_uri: redirect_uri,
        scope: scopes,
        consent_id: consent_id
      }

      params[:state] = state if state
      params[:tracking_id] = tracking_id if tracking_id
      params[:data_use_description] = data_use_description if data_use_description

      result = post('/v1/authuri', params: nil) do |req|
        req.headers[:content_type] = 'application/json'
        req.body = MultiJson.dump(params)
      end

      AuthLink.build(json: result.body)
    end

    def exchange_code(code, redirect_uri)
      params = {
        grant_type: 'authorization_code',
        client_id: Truelayer.configuration.client_id,
        client_secret: Truelayer.configuration.client_secret,
        redirect_uri: redirect_uri,
        code: code
      }

      result = post('/connect/token', params: params)

      Token.build(json: result.body)
    end

    def refresh_token(refresh_token)
      params = {
        grant_type: 'refresh_token',
        client_id: Truelayer.configuration.client_id,
        client_secret: Truelayer.configuration.client_secret,
        refresh_token: refresh_token
      }

      result = post('/connect/token', params: params)

      Token.build(json: result.body)
    end

    def providers
      response = get('/api/providers', params: { clientId: Truelayer.configuration.client_id })

      (response.body || []).map do |result|
        Provider.build(json: result)
      end
    end

    private

    def get(path, params:)
      response = connection.get(path, params)

      return response if response.success?

      raise GenericError, "#{response.status}: #{response.body}"
    end

    def post(path, params:, &block)
      response = connection.post(path, params, &block)

      return response if response.success?

      if response.status == 400
        raise InvalidRequestError, response.body
      else
        raise GenericError, "#{response.status}: #{response.body}"
      end
    end

    def connection
      auth_url = Truelayer.configuration.auth_url

      @connection ||= Faraday.new(url: auth_url) do |conn|
        conn.request :url_encoded

        conn.headers.merge!(
          user_agent: "finpoint/#{Truelayer::VERSION}"
        )
        conn.response :multi_json, symbolize_keys: true
        if Truelayer.configuration.debug
          conn.response :logger, nil, { headers: true, bodies: Truelayer.configuration.verbose }
        end
        conn.adapter Faraday.default_adapter
      end
    end
  end
end