import { SupportTable } from './factories/factory-types';
import { BlankNodeTermType, DefaultGraphTermType, LiteralTermType, NamedNodeTermType, VariableTermType } from './types';
/**
 * RDF/JS spec Term
 * @link https://rdf.js.org/data-model-spec/#term-interface
 */
export interface Term {
    termType: string;
    value: string;
    /**
     * Compare this term with {other} for structural equality
     *
     * Note that the task force spec only allows comparison with other terms
     */
    equals(other: Term | null | undefined): boolean;
}
/**
 * RDF/JS spec NamedNode
 * @link https://rdf.js.org/data-model-spec/#namednode-interface
 */
export interface NamedNode extends Term {
    termType: typeof NamedNodeTermType;
    value: string;
}
/**
 * RDF/JS spec Literal
 * @link https://rdf.js.org/data-model-spec/#literal-interface
 */
export interface BlankNode extends Term {
    termType: typeof BlankNodeTermType;
    value: string;
}
export interface BaseQuad {
    subject: Term;
    predicate: Term;
    object: Term;
    graph: Term;
}
/**
 * RDF/JS spec Quad
 * @link https://rdf.js.org/data-model-spec/#quad-interface
 */
export interface Quad<S extends Term = Quad_Subject, P extends Term = Quad_Predicate, O extends Term = Quad_Object, G extends Term = Quad_Graph> {
    subject: S;
    predicate: P;
    object: O;
    graph: G;
    equals(other: BaseQuad): boolean;
}
/**
 * RDF/JS spec Literal
 * @link https://rdf.js.org/data-model-spec/#literal-interface
 */
export interface Literal extends Term {
    /** Contains the constant "Literal". */
    termType: typeof LiteralTermType;
    /** The text value, unescaped, without language or type (example: "Brad Pitt") */
    value: string;
    /**
     * The language as lowercase BCP-47 [BCP47] string (examples: "en", "en-gb")
     * or an empty string if the literal has no language.
     */
    language: string;
    /** A NamedNode whose IRI represents the datatype of the literal. */
    datatype: NamedNode;
}
/**
 * RDF/JS spec Variable
 * @link https://rdf.js.org/data-model-spec/#variable-interface
 */
export interface Variable extends Term {
    /** Contains the constant "Variable". */
    termType: typeof VariableTermType;
    /** The name of the variable without leading "?" (example: "a"). */
    value: string;
}
/**
 * RDF/JS spec DefaultGraph
 * An instance of DefaultGraph represents the default graph.
 * It's only allowed to assign a DefaultGraph to the graph property of a Quad.
 * @link https://rdf.js.org/data-model-spec/#defaultgraph-interface
 */
export interface DefaultGraph extends Term {
    termType: typeof DefaultGraphTermType;
    /** should return and empty string'' */
    value: '';
}
/**
 * RDF/JS spec DataFactory
 *
 * Not 100% compliant due to to practicality problems.
 *
 * @link https://rdf.js.org/data-model-spec/#datafactory-interface
 */
export interface RdfJsDataFactory {
    /** Returns a new instance of NamedNode. */
    namedNode: (value: string) => NamedNode;
    /**
     * Returns a new instance of BlankNode.
     * If the value parameter is undefined a new identifier for the
     * blank node is generated for each call.
     */
    blankNode: (value?: string) => BlankNode;
    /**
     * Returns a new instance of Literal.
     * If languageOrDatatype is a NamedNode, then it is used for the value of datatype.
     * Otherwise languageOrDatatype is used for the value of language. */
    literal: (value: string, languageOrDatatype: string | NamedNode) => Literal;
    /** Returns a new instance of Variable. This method is optional. */
    variable?: (value: string) => Variable;
    /**
     * Returns an instance of DefaultGraph.
     */
    defaultGraph: () => DefaultGraph;
    /**
     * Returns a new instance of the specific Term subclass given by original.termType
     * (e.g., NamedNode, BlankNode, Literal, etc.),
     * such that newObject.equals(original) returns true.
     * Not implemented in RDFJS, so optional.
     */
    fromTerm?: (original: Term) => Term;
    /**
     * Returns a new instance of Quad, such that newObject.equals(original) returns true.
     * Not implemented in RDFJS, so optional.
     */
    fromQuad?: (original: Quad) => Quad;
    /**
     * Returns a new instance of Quad.
     * If graph is undefined or null it MUST set graph to a DefaultGraph.
     */
    quad: (subject: Term, predicate: Term, object: Term, graph?: Term) => Quad<any, any, any, any>;
    /**
     * Returns a new instance of Quad.
     * If graph is undefined or null it MUST set graph to a DefaultGraph.
     */
    triple: (subject: Term, predicate: Term, object: Term, graph?: Term) => Quad<any, any, any, any>;
    /**
     * Check for specific features/behaviour on the factory.
     *
     * This does not exist on the original RDF/JS spec
     */
    supports: SupportTable;
}
/** A RDF/JS spec Subject */
export type Quad_Subject = NamedNode | BlankNode | Variable;
/** A RDF/JS spec Predicate */
export type Quad_Predicate = NamedNode | Variable;
/** A RDF/JS spec Object */
export type Quad_Object = NamedNode | BlankNode | Literal | Variable | Term;
/** A RDF/JS spec Graph */
export type Quad_Graph = NamedNode | DefaultGraph | BlankNode | Variable;