import {combineReducers} from 'redux';
import {all, call} from 'redux-saga/effects';

export function createMapDispatchToProps(ducks) {
  return (dispatch) => {
    const map = {};
    for (const i in ducks) {
      map[i] = {};
      for (const j in ducks[i].actions.creators) {
        map[i][j] = (...args) => {
          return dispatch(ducks[i].actions.creators[j](...args));
        }
      }
    }
    return map;
  };
}

export function createReducer(ducks) {
  const map = {};
  for (const i in ducks) {
    map[i] = ducks[i].reducer;
  }
  return combineReducers(map);
}

export function createSaga(ducks) {
  const sagas = [];
  for (const i in ducks) {
    if (!ducks[i].saga) {
      continue;
    }
    sagas.push(call(ducks[i].saga));
  }
  return function* () {
    yield all(sagas);
  }
}

export function compose(ducks) {
  return {
    reducer: createReducer(ducks),
    saga: createSaga(ducks),
  }
}