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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 _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }

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

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

import { invariant } from '@react-dnd/invariant';
import { addSource as _addSource, addTarget as _addTarget, removeSource as _removeSource, removeTarget as _removeTarget } from './actions/registry';
import getNextUniqueId from './utils/getNextUniqueId';
import { HandlerRole } from './interfaces';
import { validateSourceContract, validateTargetContract, validateType } from './contracts';
import { asap } from '@react-dnd/asap';

function getNextHandlerId(role) {
  var id = getNextUniqueId().toString();

switch (role) {
    case HandlerRole.SOURCE:
      return "S".concat(id);

case HandlerRole.TARGET:
      return "T".concat(id);

default:
      throw new Error("Unknown Handler Role: ".concat(role));
  }
}

function parseRoleFromHandlerId(handlerId) {
  switch (handlerId[0]) {
    case 'S':
      return HandlerRole.SOURCE;

case 'T':
      return HandlerRole.TARGET;

default:
      invariant(false, "Cannot parse handler ID: ".concat(handlerId));
  }
}

function mapContainsValue(map, searchValue) {
  var entries = map.entries();
  var isDone = false;

do {
    var _entries$next = entries.next(),
        done = _entries$next.done,
        _entries$next$value = _slicedToArray(_entries$next.value, 2),
        value = _entries$next$value[1];

if (value === searchValue) {
      return true;
    }

isDone = !!done;
  } while (!isDone);

return false;
}

var HandlerRegistryImpl =
/*#__PURE__*/
function () {
  function HandlerRegistryImpl(store) {
    _classCallCheck(this, HandlerRegistryImpl);

this.types = new Map();
    this.dragSources = new Map();
    this.dropTargets = new Map();
    this.pinnedSourceId = null;
    this.pinnedSource = null;
    this.store = store;
  }

_createClass(HandlerRegistryImpl, [{
    key: "addSource",
    value: function addSource(type, source) {
      validateType(type);
      validateSourceContract(source);
      var sourceId = this.addHandler(HandlerRole.SOURCE, type, source);
      this.store.dispatch(_addSource(sourceId));
      return sourceId;
    }
  }, {
    key: "addTarget",
    value: function addTarget(type, target) {
      validateType(type, true);
      validateTargetContract(target);
      var targetId = this.addHandler(HandlerRole.TARGET, type, target);
      this.store.dispatch(_addTarget(targetId));
      return targetId;
    }
  }, {
    key: "containsHandler",
    value: function containsHandler(handler) {
      return mapContainsValue(this.dragSources, handler) || mapContainsValue(this.dropTargets, handler);
    }
  }, {
    key: "getSource",
    value: function getSource(sourceId) {
      var includePinned = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
      invariant(this.isSourceId(sourceId), 'Expected a valid source ID.');
      var isPinned = includePinned && sourceId === this.pinnedSourceId;
      var source = isPinned ? this.pinnedSource : this.dragSources.get(sourceId);
      return source;
    }
  }, {
    key: "getTarget",
    value: function getTarget(targetId) {
      invariant(this.isTargetId(targetId), 'Expected a valid target ID.');
      return this.dropTargets.get(targetId);
    }
  }, {
    key: "getSourceType",
    value: function getSourceType(sourceId) {
      invariant(this.isSourceId(sourceId), 'Expected a valid source ID.');
      return this.types.get(sourceId);
    }
  }, {
    key: "getTargetType",
    value: function getTargetType(targetId) {
      invariant(this.isTargetId(targetId), 'Expected a valid target ID.');
      return this.types.get(targetId);
    }
  }, {
    key: "isSourceId",
    value: function isSourceId(handlerId) {
      var role = parseRoleFromHandlerId(handlerId);
      return role === HandlerRole.SOURCE;
    }
  }, {
    key: "isTargetId",
    value: function isTargetId(handlerId) {
      var role = parseRoleFromHandlerId(handlerId);
      return role === HandlerRole.TARGET;
    }
  }, {
    key: "removeSource",
    value: function removeSource(sourceId) {
      var _this = this;

invariant(this.getSource(sourceId), 'Expected an existing source.');
      this.store.dispatch(_removeSource(sourceId));
      asap(function () {
        _this.dragSources.delete(sourceId);

_this.types.delete(sourceId);
      });
    }
  }, {
    key: "removeTarget",
    value: function removeTarget(targetId) {
      invariant(this.getTarget(targetId), 'Expected an existing target.');
      this.store.dispatch(_removeTarget(targetId));
      this.dropTargets.delete(targetId);
      this.types.delete(targetId);
    }
  }, {
    key: "pinSource",
    value: function pinSource(sourceId) {
      var source = this.getSource(sourceId);
      invariant(source, 'Expected an existing source.');
      this.pinnedSourceId = sourceId;
      this.pinnedSource = source;
    }
  }, {
    key: "unpinSource",
    value: function unpinSource() {
      invariant(this.pinnedSource, 'No source is pinned at the time.');
      this.pinnedSourceId = null;
      this.pinnedSource = null;
    }
  }, {
    key: "addHandler",
    value: function addHandler(role, type, handler) {
      var id = getNextHandlerId(role);
      this.types.set(id, type);

if (role === HandlerRole.SOURCE) {
        this.dragSources.set(id, handler);
      } else if (role === HandlerRole.TARGET) {
        this.dropTargets.set(id, handler);
      }

return id;
    }
  }]);

return HandlerRegistryImpl;
}();

export { HandlerRegistryImpl as default };