const crypto = require("crypto");

const scenario = require("./scenario");
const config = require("./config");

function builder(scenarioName, scenarioConfig, scenarioPhone) {
  const scenes = [];

  const builtScenario = scenario[scenarioName](scenarioConfig);
  const sessionId = crypto.randomBytes(16).toString("hex");

  for (const scene of builtScenario) {
    scene.sessionId = sessionId;
    scene.ussdPhone = scenarioPhone;

    Object.assign(scene, config);

    scenes.push(scene);
  }

  return scenes;
}

function parseScenario(scenarioPhone, scenarioString) {
  const [scenarioName, scenarioConfig] = scenarioString.split(" ");

  return builder(
    scenarioName,
    parseScenarioConfig(scenarioConfig),
    scenarioPhone
  );
}

function parseScenarioConfig(scenarioConfigString) {
  const configs = scenarioConfigString.split(",");
  const configObject = {};

  for (const conf of configs) {
    [key, value] = conf.split("=");
    configObject[key] = value;
  }

  return configObject;
}

module.exports = { parseScenario };