import { EngineAction } from '/imports/api/engine/action/EngineActions';
import applyTask from '/imports/api/engine/action/tasks/applyTask'
import InputProvider from '/imports/api/engine/action/functions/userInput/InputProvider';
import saveInputChoices from './userInput/saveInputChoices';

// TODO create a function to get the effective value of a property,
// simulating all the result updates in the action so far

/**
 * Apply an action
 * This is run once as a simulation on the client awaiting all the various inputs or step through
 * clicks from the user, then it is run as part of the runAction method, where it is expected to
 * complete instantly on the client, and sent to the server as a method call
 * @param action The action to apply
 * @param userInput The input provider
 * @param { Object } options
 */
export default async function applyAction(action: EngineAction, userInput: InputProvider, options?: {
  simulate?: boolean, stepThrough?: boolean,
}) {
  const { simulate, stepThrough } = options || {};
  if (!simulate && stepThrough) throw 'Cannot step through unless simulating';
  if (simulate && !userInput) throw 'Must provide a function to get user input when simulating';

  if (action._isSimulation || action._stepThrough) {
    console.error('_isSimulation and _stepThrough should not be set on the action, rather call\
    applyAction with the appropriate options');
  }

  // If we are simulating, save the user input choices
  if (simulate) {
    userInput = saveInputChoices(action, userInput);
  }

  action._stepThrough = stepThrough;
  action._isSimulation = simulate;
  action.taskCount = 0;
  // Get the target Ids from the user input if they are expected and not found
  if (
    !action.task.targetIds?.length
    && action.tabletopId
    && 'prop' in action.task
    && (
      action.task.prop?.target === 'singleTarget' ||
      action.task.prop?.target === 'multipleTargets'
    )
  ) {
    action.task.targetIds = await (userInput.targetIds(action.task.prop.target));
  }

  await applyTask(action, action.task, userInput);
  return action;
}