'use strict';

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

var React = require('react');
var React__default = _interopDefault(React);

function _classCallCheck(instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
}

function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, descriptor.key, descriptor);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

function _objectSpread(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i] != null ? arguments[i] : {};
    var ownKeys = Object.keys(source);

    if (typeof Object.getOwnPropertySymbols === 'function') {
      ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) {
        return Object.getOwnPropertyDescriptor(source, sym).enumerable;
      }));
    }

    ownKeys.forEach(function (key) {
      _defineProperty(target, key, source[key]);
    });
  }

  return target;
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }

  subClass.prototype = Object.create(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      writable: true,
      configurable: true
    }
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

function _getPrototypeOf(o) {
  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
    return o.__proto__ || Object.getPrototypeOf(o);
  };
  return _getPrototypeOf(o);
}

function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
  };

  return _setPrototypeOf(o, p);
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

function _possibleConstructorReturn(self, call) {
  if (call && (typeof call === "object" || typeof call === "function")) {
    return call;
  }

  return _assertThisInitialized(self);
}

function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread();
}

function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];

    return arr2;
  }
}

function _iterableToArray(iter) {
  if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter);
}

function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance");
}

var cached = {};

function registerModel(app, model) {
  model = model.default || model;

  if (!cached[model.namespace]) {
    app.model(model);
    cached[model.namespace] = 1;
  }
}

var defaultLoadingComponent = function defaultLoadingComponent() {
  return null;
};

function asyncComponent(config) {
  var resolve = config.resolve;
  return (
    /*#__PURE__*/
    function (_Component) {
      _inherits(DynamicComponent, _Component);

      function DynamicComponent() {
        var _getPrototypeOf2;

        var _this;

        _classCallCheck(this, DynamicComponent);

        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        _this = _possibleConstructorReturn(this, (_getPrototypeOf2 = _getPrototypeOf(DynamicComponent)).call.apply(_getPrototypeOf2, [this].concat(args)));
        _this.LoadingComponent = config.LoadingComponent || defaultLoadingComponent;
        _this.state = {
          AsyncComponent: null
        };

        _this.load();

        return _this;
      }

      _createClass(DynamicComponent, [{
        key: "componentDidMount",
        value: function componentDidMount() {
          this.mounted = true;
        }
      }, {
        key: "componentWillUnmount",
        value: function componentWillUnmount() {
          this.mounted = false;
        }
      }, {
        key: "load",
        value: function load() {
          var _this2 = this;

          resolve().then(function (m) {
            var AsyncComponent = m.default || m;

            if (_this2.mounted) {
              _this2.setState({
                AsyncComponent: AsyncComponent
              });
            } else {
              _this2.state.AsyncComponent = AsyncComponent; // eslint-disable-line
            }
          });
        }
      }, {
        key: "render",
        value: function render() {
          var AsyncComponent = this.state.AsyncComponent;
          var LoadingComponent = this.LoadingComponent;
          if (AsyncComponent) return React__default.createElement(AsyncComponent, this.props);
          return React__default.createElement(LoadingComponent, this.props);
        }
      }]);

      return DynamicComponent;
    }(React.Component)
  );
}

function dynamic(config) {
  var app = config.app,
      resolveModels = config.models,
      resolveComponent = config.component;
  return asyncComponent(_objectSpread({
    resolve: config.resolve || function () {
      var models = typeof resolveModels === 'function' ? resolveModels() : [];
      var component = resolveComponent();
      return new Promise(function (resolve) {
        Promise.all([].concat(_toConsumableArray(models), [component])).then(function (ret) {
          if (!models || !models.length) {
            return resolve(ret[0]);
          } else {
            var len = models.length;
            ret.slice(0, len).forEach(function (m) {
              m = m.default || m;

              if (!Array.isArray(m)) {
                m = [m];
              }

              m.map(function (_) {
                return registerModel(app, _);
              });
            });
            resolve(ret[len]);
          }
        });
      });
    }
  }, config));
}

dynamic.setDefaultLoadingComponent = function (LoadingComponent) {
  defaultLoadingComponent = LoadingComponent;
};

module.exports = dynamic;