/**
 * Contains a range of UTF-8 character offsets and token references that
 * identify the region of the source from which the AST derived.
 */
export class Location {
  /**
   * The character offset at which this Node begins.
   */

  /**
   * The character offset at which this Node ends.
   */

  /**
   * The Token at which this Node begins.
   */

  /**
   * The Token at which this Node ends.
   */

  /**
   * The Source document the AST represents.
   */
  constructor(startToken, endToken, source) {
    this.start = startToken.start;
    this.end = endToken.end;
    this.startToken = startToken;
    this.endToken = endToken;
    this.source = source;
  }

  get [Symbol.toStringTag]() {
    return 'Location';
  }

  toJSON() {
    return {
      start: this.start,
      end: this.end,
    };
  }
}
/**
 * Represents a range of characters represented by a lexical token
 * within a Source.
 */

export class Token {
  /**
   * The kind of Token.
   */

  /**
   * The character offset at which this Node begins.
   */

  /**
   * The character offset at which this Node ends.
   */

  /**
   * The 1-indexed line number on which this Token appears.
   */

  /**
   * The 1-indexed column number at which this Token begins.
   */

  /**
   * For non-punctuation tokens, represents the interpreted value of the token.
   *
   * Note: is undefined for punctuation tokens, but typed as string for
   * convenience in the parser.
   */

  /**
   * Tokens exist as nodes in a double-linked-list amongst all tokens
   * including ignored tokens. <SOF> is always the first node and <EOF>
   * the last.
   */
  constructor(kind, start, end, line, column, value) {
    this.kind = kind;
    this.start = start;
    this.end = end;
    this.line = line;
    this.column = column; // eslint-disable-next-line @typescript-eslint/no-non-null-assertion

    this.value = value;
    this.prev = null;
    this.next = null;
  }

  get [Symbol.toStringTag]() {
    return 'Token';
  }

  toJSON() {
    return {
      kind: this.kind,
      value: this.value,
      line: this.line,
      column: this.column,
    };
  }
}
/**
 * The list of all possible AST node types.
 */

/**
 * @internal
 */
export const QueryDocumentKeys = {
  Name: [],
  Document: ['definitions'],
  OperationDefinition: [
    'name',
    'variableDefinitions',
    'directives',
    'selectionSet',
  ],
  VariableDefinition: ['variable', 'type', 'defaultValue', 'directives'],
  Variable: ['name'],
  SelectionSet: ['selections'],
  Field: ['alias', 'name', 'arguments', 'directives', 'selectionSet'],
  Argument: ['name', 'value'],
  FragmentSpread: ['name', 'directives'],
  InlineFragment: ['typeCondition', 'directives', 'selectionSet'],
  FragmentDefinition: [
    'name', // Note: fragment variable definitions are deprecated and will removed in v17.0.0
    'variableDefinitions',
    'typeCondition',
    'directives',
    'selectionSet',
  ],
  IntValue: [],
  FloatValue: [],
  StringValue: [],
  BooleanValue: [],
  NullValue: [],
  EnumValue: [],
  ListValue: ['values'],
  ObjectValue: ['fields'],
  ObjectField: ['name', 'value'],
  Directive: ['name', 'arguments'],
  NamedType: ['name'],
  ListType: ['type'],
  NonNullType: ['type'],
  SchemaDefinition: ['description', 'directives', 'operationTypes'],
  OperationTypeDefinition: ['type'],
  ScalarTypeDefinition: ['description', 'name', 'directives'],
  ObjectTypeDefinition: [
    'description',
    'name',
    'interfaces',
    'directives',
    'fields',
  ],
  FieldDefinition: ['description', 'name', 'arguments', 'type', 'directives'],
  InputValueDefinition: [
    'description',
    'name',
    'type',
    'defaultValue',
    'directives',
  ],
  InterfaceTypeDefinition: [
    'description',
    'name',
    'interfaces',
    'directives',
    'fields',
  ],
  UnionTypeDefinition: ['description', 'name', 'directives', 'types'],
  EnumTypeDefinition: ['description', 'name', 'directives', 'values'],
  EnumValueDefinition: ['description', 'name', 'directives'],
  InputObjectTypeDefinition: ['description', 'name', 'directives', 'fields'],
  DirectiveDefinition: ['description', 'name', 'arguments', 'locations'],
  SchemaExtension: ['directives', 'operationTypes'],
  ScalarTypeExtension: ['name', 'directives'],
  ObjectTypeExtension: ['name', 'interfaces', 'directives', 'fields'],
  InterfaceTypeExtension: ['name', 'interfaces', 'directives', 'fields'],
  UnionTypeExtension: ['name', 'directives', 'types'],
  EnumTypeExtension: ['name', 'directives', 'values'],
  InputObjectTypeExtension: ['name', 'directives', 'fields'],
};
const kindValues = new Set(Object.keys(QueryDocumentKeys));
/**
 * @internal
 */

export function isNode(maybeNode) {
  const maybeKind =
    maybeNode === null || maybeNode === void 0 ? void 0 : maybeNode.kind;
  return typeof maybeKind === 'string' && kindValues.has(maybeKind);
}
/** Name */

var OperationTypeNode;

(function (OperationTypeNode) {
  OperationTypeNode['QUERY'] = 'query';
  OperationTypeNode['MUTATION'] = 'mutation';
  OperationTypeNode['SUBSCRIPTION'] = 'subscription';
})(OperationTypeNode || (OperationTypeNode = {}));

export { OperationTypeNode };