(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "apollo-utilities", "ts-invariant"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("apollo-utilities"), require("ts-invariant"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.apolloUtilities, global.tsInvariant);
    global.unknown = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _apolloUtilities, _tsInvariant) {

  _exports.__esModule = true;
  _exports.check = check;
  _exports.filter = filter;
  _exports.propType = propType;
  _exports.default = void 0;

  function graphql(resolver, document, rootValue, contextValue, variableValues, execOptions) {
    if (variableValues === void 0) {
      variableValues = {};
    }

    if (execOptions === void 0) {
      execOptions = {};
    }

    var mainDefinition = (0, _apolloUtilities.getMainDefinition)(document);
    var fragments = (0, _apolloUtilities.getFragmentDefinitions)(document);
    var fragmentMap = (0, _apolloUtilities.createFragmentMap)(fragments);
    var resultMapper = execOptions.resultMapper;

    var fragmentMatcher = execOptions.fragmentMatcher || function () {
      return true;
    };

    var execContext = {
      fragmentMap: fragmentMap,
      contextValue: contextValue,
      variableValues: variableValues,
      resultMapper: resultMapper,
      resolver: resolver,
      fragmentMatcher: fragmentMatcher
    };
    return executeSelectionSet(mainDefinition.selectionSet, rootValue, execContext);
  }

  function executeSelectionSet(selectionSet, rootValue, execContext) {
    var fragmentMap = execContext.fragmentMap,
        contextValue = execContext.contextValue,
        variables = execContext.variableValues;
    var result = {};
    selectionSet.selections.forEach(function (selection) {
      if (variables && !(0, _apolloUtilities.shouldInclude)(selection, variables)) {
        return;
      }

      if ((0, _apolloUtilities.isField)(selection)) {
        var fieldResult = executeField(selection, rootValue, execContext);
        var resultFieldKey = (0, _apolloUtilities.resultKeyNameFromField)(selection);

        if (fieldResult !== undefined) {
          if (result[resultFieldKey] === undefined) {
            result[resultFieldKey] = fieldResult;
          } else {
            merge(result[resultFieldKey], fieldResult);
          }
        }
      } else {
        var fragment = void 0;

        if ((0, _apolloUtilities.isInlineFragment)(selection)) {
          fragment = selection;
        } else {
          fragment = fragmentMap[selection.name.value];

          if (!fragment) {
            throw new Error("No fragment named " + selection.name.value);
          }
        }

        var typeCondition = fragment.typeCondition.name.value;

        if (execContext.fragmentMatcher(rootValue, typeCondition, contextValue)) {
          var fragmentResult = executeSelectionSet(fragment.selectionSet, rootValue, execContext);
          merge(result, fragmentResult);
        }
      }
    });

    if (execContext.resultMapper) {
      return execContext.resultMapper(result, rootValue);
    }

    return result;
  }

  function executeField(field, rootValue, execContext) {
    var variables = execContext.variableValues,
        contextValue = execContext.contextValue,
        resolver = execContext.resolver;
    var fieldName = field.name.value;
    var args = (0, _apolloUtilities.argumentsObjectFromField)(field, variables);
    var info = {
      isLeaf: !field.selectionSet,
      resultKey: (0, _apolloUtilities.resultKeyNameFromField)(field),
      directives: (0, _apolloUtilities.getDirectiveInfoFromField)(field, variables),
      field: field
    };
    var result = resolver(fieldName, rootValue, args, contextValue, info);

    if (!field.selectionSet) {
      return result;
    }

    if (result == null) {
      return result;
    }

    if (Array.isArray(result)) {
      return executeSubSelectedArray(field, result, execContext);
    }

    return executeSelectionSet(field.selectionSet, result, execContext);
  }

  function executeSubSelectedArray(field, result, execContext) {
    return result.map(function (item) {
      if (item === null) {
        return null;
      }

      if (Array.isArray(item)) {
        return executeSubSelectedArray(field, item, execContext);
      }

      return executeSelectionSet(field.selectionSet, item, execContext);
    });
  }

  var hasOwn = Object.prototype.hasOwnProperty;

  function merge(dest, src) {
    if (src !== null && typeof src === 'object') {
      Object.keys(src).forEach(function (key) {
        var srcVal = src[key];

        if (!hasOwn.call(dest, key)) {
          dest[key] = srcVal;
        } else {
          merge(dest[key], srcVal);
        }
      });
    }
  }

  var hasOwnProperty = Object.prototype.hasOwnProperty;

  function filter(doc, data, variableValues) {
    if (variableValues === void 0) {
      variableValues = {};
    }

    if (data === null) return data;

    var resolver = function (fieldName, root, args, context, info) {
      return root[info.resultKey];
    };

    return Array.isArray(data) ? data.map(function (dataObj) {
      return graphql(resolver, doc, dataObj, null, variableValues);
    }) : graphql(resolver, doc, data, null, variableValues);
  }

  function check(doc, data, variables) {
    if (variables === void 0) {
      variables = {};
    }

    var resolver = function (fieldName, root, args, context, info) {
      process.env.NODE_ENV === "production" ? (0, _tsInvariant.invariant)(hasOwnProperty.call(root, info.resultKey) || !variables && hasVariableInclusions(info.field.directives), 1) : (0, _tsInvariant.invariant)(hasOwnProperty.call(root, info.resultKey) || !variables && hasVariableInclusions(info.field.directives), info.resultKey + " missing on " + JSON.stringify(root));
      return root[info.resultKey];
    };

    graphql(resolver, doc, data, {}, variables, {
      fragmentMatcher: function () {
        return false;
      }
    });
  }

  function hasVariableInclusions(directives) {
    return (0, _apolloUtilities.getInclusionDirectives)(directives).some(function (_a) {
      var ifArgument = _a.ifArgument;
      return ifArgument.value && ifArgument.value.kind === 'Variable';
    });
  }

  var ANONYMOUS = '<<anonymous>>';

  function PropTypeError(message) {
    this.message = message;
    this.stack = '';
  }

  PropTypeError.prototype = Error.prototype;
  var reactPropTypeLocationNames = {
    prop: 'prop',
    context: 'context',
    childContext: 'child context'
  };

  function createChainableTypeChecker(validate) {
    function checkType(isRequired, props, propName, componentName, location, propFullName) {
      componentName = componentName || ANONYMOUS;
      propFullName = propFullName || propName;

      if (props[propName] == null) {
        var locationName = reactPropTypeLocationNames[location];

        if (isRequired) {
          if (props[propName] === null) {
            return new PropTypeError("The " + locationName + " `" + propFullName + "` is marked as required " + ("in `" + componentName + "`, but its value is `null`."));
          }

          return new PropTypeError("The " + locationName + " `" + propFullName + "` is marked as required in " + ("`" + componentName + "`, but its value is `undefined`."));
        }

        return null;
      } else {
        return validate(props, propName, componentName, location, propFullName);
      }
    }

    var chainedCheckType = checkType.bind(null, false);
    chainedCheckType.isRequired = checkType.bind(null, true);
    return chainedCheckType;
  }

  function propType(doc, mapPropsToVariables) {
    if (mapPropsToVariables === void 0) {
      mapPropsToVariables = function (props) {
        return null;
      };
    }

    return createChainableTypeChecker(function (props, propName) {
      var prop = props[propName];

      try {
        if (!prop.loading) {
          check(doc, prop, mapPropsToVariables(props));
        }

        return null;
      } catch (e) {
        return e;
      }
    });
  }

  var _default = graphql; 

  _exports.default = _default;
});