'use strict';

const API_PREFIX = '/app-api';

function buildRequest(path, options = {}, accessToken = '') {
  const headers = {
    Accept: 'application/json',
    ...(options.body ? { 'Content-Type': 'application/json' } : {}),
    ...(accessToken ? { Authorization: `Bearer ${accessToken}` } : {}),
  };
  return { url: `${API_PREFIX}${path}`, options: { ...options, headers } };
}

function answerCommand(session, questionSequence, selectedAnswer, idempotencyKey, clientSequence) {
  return {
    sessionId: session.id,
    questionSequence,
    selectedAnswer,
    idempotencyKey,
    clientSequence,
    expectedSessionVersion: session.sessionVersion,
  };
}

function applyAnswerResult(session, result) {
  return {
    ...session,
    sessionVersion: result.sessionVersion,
    serverVersion: result.serverVersion ?? result.sessionVersion,
    acceptedSequence: Math.max(session.acceptedSequence || 0, result.acceptedSequence || 0),
  };
}

module.exports = { buildRequest, answerCommand, applyAnswerResult };