"use strict";

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

var _inspect = _interopRequireDefault(require("../../jsutils/inspect"));

var _invariant = _interopRequireDefault(require("../../jsutils/invariant"));

var _GraphQLError = require("../../error/GraphQLError");

var _kinds = require("../../language/kinds");

var _directiveLocation = require("../../language/directiveLocation");

var _directives = require("../../type/directives");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Known directives
 *
 * A GraphQL document is only valid if all `@directives` are known by the
 * schema and legally positioned.
 */
function KnownDirectivesRule(context) {
  var locationsMap = Object.create(null);
  var schema = context.getSchema();
  var definedDirectives = schema ? schema.getDirectives() : _directives.specifiedDirectives;

  for (var _i2 = 0; _i2 < definedDirectives.length; _i2++) {
    var directive = definedDirectives[_i2];
    locationsMap[directive.name] = directive.locations;
  }

  var astDefinitions = context.getDocument().definitions;

  for (var _i4 = 0; _i4 < astDefinitions.length; _i4++) {
    var def = astDefinitions[_i4];

    if (def.kind === _kinds.Kind.DIRECTIVE_DEFINITION) {
      locationsMap[def.name.value] = def.locations.map(function (name) {
        return name.value;
      });
    }
  }

  return {
    Directive: function Directive(node, _key, _parent, _path, ancestors) {
      var name = node.name.value;
      var locations = locationsMap[name];

      if (!locations) {
        context.reportError(new _GraphQLError.GraphQLError("Unknown directive \"@".concat(name, "\"."), node));
        return;
      }

      var candidateLocation = getDirectiveLocationForASTPath(ancestors);

      if (candidateLocation && locations.indexOf(candidateLocation) === -1) {
        context.reportError(new _GraphQLError.GraphQLError("Directive \"@".concat(name, "\" may not be used on ").concat(candidateLocation, "."), node));
      }
    }
  };
}

function getDirectiveLocationForASTPath(ancestors) {
  var appliedTo = ancestors[ancestors.length - 1];

  /* istanbul ignore next */
  !Array.isArray(appliedTo) || (0, _invariant.default)(0);

  switch (appliedTo.kind) {
    case _kinds.Kind.OPERATION_DEFINITION:
      return getDirectiveLocationForOperation(appliedTo.operation);

    case _kinds.Kind.FIELD:
      return _directiveLocation.DirectiveLocation.FIELD;

    case _kinds.Kind.FRAGMENT_SPREAD:
      return _directiveLocation.DirectiveLocation.FRAGMENT_SPREAD;

    case _kinds.Kind.INLINE_FRAGMENT:
      return _directiveLocation.DirectiveLocation.INLINE_FRAGMENT;

    case _kinds.Kind.FRAGMENT_DEFINITION:
      return _directiveLocation.DirectiveLocation.FRAGMENT_DEFINITION;

    case _kinds.Kind.VARIABLE_DEFINITION:
      return _directiveLocation.DirectiveLocation.VARIABLE_DEFINITION;

    case _kinds.Kind.SCHEMA_DEFINITION:
    case _kinds.Kind.SCHEMA_EXTENSION:
      return _directiveLocation.DirectiveLocation.SCHEMA;

    case _kinds.Kind.SCALAR_TYPE_DEFINITION:
    case _kinds.Kind.SCALAR_TYPE_EXTENSION:
      return _directiveLocation.DirectiveLocation.SCALAR;

    case _kinds.Kind.OBJECT_TYPE_DEFINITION:
    case _kinds.Kind.OBJECT_TYPE_EXTENSION:
      return _directiveLocation.DirectiveLocation.OBJECT;

    case _kinds.Kind.FIELD_DEFINITION:
      return _directiveLocation.DirectiveLocation.FIELD_DEFINITION;

    case _kinds.Kind.INTERFACE_TYPE_DEFINITION:
    case _kinds.Kind.INTERFACE_TYPE_EXTENSION:
      return _directiveLocation.DirectiveLocation.INTERFACE;

    case _kinds.Kind.UNION_TYPE_DEFINITION:
    case _kinds.Kind.UNION_TYPE_EXTENSION:
      return _directiveLocation.DirectiveLocation.UNION;

    case _kinds.Kind.ENUM_TYPE_DEFINITION:
    case _kinds.Kind.ENUM_TYPE_EXTENSION:
      return _directiveLocation.DirectiveLocation.ENUM;

    case _kinds.Kind.ENUM_VALUE_DEFINITION:
      return _directiveLocation.DirectiveLocation.ENUM_VALUE;

    case _kinds.Kind.INPUT_OBJECT_TYPE_DEFINITION:
    case _kinds.Kind.INPUT_OBJECT_TYPE_EXTENSION:
      return _directiveLocation.DirectiveLocation.INPUT_OBJECT;

    case _kinds.Kind.INPUT_VALUE_DEFINITION:
      {
        var parentNode = ancestors[ancestors.length - 3];
        return parentNode.kind === _kinds.Kind.INPUT_OBJECT_TYPE_DEFINITION ? _directiveLocation.DirectiveLocation.INPUT_FIELD_DEFINITION : _directiveLocation.DirectiveLocation.ARGUMENT_DEFINITION;
      }
  }
}

function getDirectiveLocationForOperation(operation) {
  switch (operation) {
    case 'query':
      return _directiveLocation.DirectiveLocation.QUERY;

    case 'mutation':
      return _directiveLocation.DirectiveLocation.MUTATION;

    case 'subscription':
      return _directiveLocation.DirectiveLocation.SUBSCRIPTION;
  } // Not reachable. All possible types have been considered.


  /* istanbul ignore next */
  (0, _invariant.default)(false, 'Unexpected operation: ' + (0, _inspect.default)(operation));
}