"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.subReducer = undefined;

var _cowValueModel2 = require("./cow-value-model");

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

var subReducer = exports.subReducer = function subReducer(key, reducer) {
    for (var _len = arguments.length, otherKeys = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
        otherKeys[_key - 2] = arguments[_key];
    }

    var _cowValueModel = (0, _cowValueModel2.cowValueModel)(key),
        getValue = _cowValueModel.get,
        setValue = _cowValueModel.set,
        otherParts = otherKeys.map(function (each) {
        return (0, _cowValueModel2.cowValueModel)(each).get;
    });

    return function (state, action) {
        var newSubState = reducer.apply(undefined, [getValue(state), action].concat(_toConsumableArray(otherParts.map(function (getValue) {
            return getValue(state);
        }))));
        if (typeof newSubState === "undefined") {
            throw new Error("The '" + key + "' reducer must not return undefined.");
        }
        return setValue(state, newSubState);
    };
};