import { GraphQLSchema, DocumentNode } from 'graphql';
import { DocumentFile } from './types';
export declare namespace Types {
    type InstanceOrArray<T> = T | T[];
    type UrlSchema = string | {
        [url: string]: {
            headers?: {
                [headerName: string]: string;
            };
        };
    };
    type LocalSchemaPath = string;
    type SchemaGlobPath = string;
    type Schema = UrlSchema | LocalSchemaPath | SchemaGlobPath;
    type OperationDocumentGlobPath = string;
    type OperationDocument = OperationDocumentGlobPath;
    type PluginConfig = InstanceOrArray<string> | {
        [key: string]: any;
    };
    type ConfiguredPlugin = {
        [name: string]: PluginConfig;
    };
    type NamedPlugin = string;
    type OutputConfig = InstanceOrArray<NamedPlugin | ConfiguredPlugin>;
    type ConfiguredOutput = {
        documents?: InstanceOrArray<OperationDocument>;
        schema?: InstanceOrArray<Schema>;
        plugins: OutputConfig;
        config?: {
            [key: string]: any;
        };
    };
    type RequireExtension = InstanceOrArray<string>;
    interface Config {
        schema: InstanceOrArray<Schema>;
        require?: RequireExtension;
        mergeSchemaFiles?: string;
        documents?: InstanceOrArray<OperationDocument>;
        config?: {
            [key: string]: any;
        };
        generates: {
            [filename: string]: OutputConfig | ConfiguredOutput;
        };
        overwrite?: boolean;
        watch?: boolean;
        silent?: boolean;
    }
}
export declare type PluginFunction<T = any> = (schema: GraphQLSchema, documents: DocumentFile[], config: T) => Promise<string> | string;
export declare type PluginValidateFn<T = any> = (schema: GraphQLSchema, documents: DocumentFile[], config: T, outputFile: string, allPlugins: Types.ConfiguredPlugin[]) => Promise<void> | void;
export interface CodegenPlugin<T = any> {
    plugin: PluginFunction<T>;
    addToSchema?: string | DocumentNode;
    validate?: PluginValidateFn;
}