/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import type {ConcreteRequest, ProvidedVariableType} from './RelayConcreteNode';

export interface JSResourceReference<TModule> {
    getModuleId(): string;
    getModuleIfRequired(): TModule | null | undefined;
    load(): Promise<TModule>;
}

/**
 * Represents a single operation used to processing and normalize runtime
 * request results.
 */
export interface NormalizationOperation {
    readonly kind: 'Operation';
    readonly name: string;
    readonly argumentDefinitions: readonly NormalizationLocalArgumentDefinition[];
    readonly selections: readonly NormalizationSelection[];
    readonly clientAbstractTypes?: {
        readonly [key: string]: readonly string[];
    };
    readonly use_exec_time_resolvers?: boolean;
    readonly exec_time_resolvers_enabled_provider?: ProvidedVariableType;
}

export type NormalizationHandle = NormalizationScalarHandle | NormalizationLinkedHandle;

export interface NormalizationLinkedHandle {
    readonly kind: 'LinkedHandle';
    readonly alias?: string | null | undefined;
    readonly name: string;
    readonly args?: readonly NormalizationArgument[] | null | undefined;
    readonly handle: string;
    readonly key: string;
    // NOTE: this property is optional because it's expected to be rarely used
    readonly dynamicKey?: NormalizationArgument | null | undefined;
    readonly filters?: readonly string[] | null | undefined;
    readonly handleArgs?: readonly NormalizationArgument[];
}

export interface NormalizationScalarHandle {
    readonly kind: 'ScalarHandle';
    readonly alias?: string | null | undefined;
    readonly name: string;
    readonly args?: readonly NormalizationArgument[] | null | undefined;
    readonly handle: string;
    readonly key: string;
    // NOTE: this property is optional because it's expected to be rarely used
    readonly dynamicKey?: NormalizationArgument | null | undefined;
    readonly filters?: readonly string[] | null | undefined;
    readonly handleArgs?: readonly NormalizationArgument[];
}

export type NormalizationArgument =
    | NormalizationListValueArgument
    | NormalizationLiteralArgument
    | NormalizationObjectValueArgument
    | NormalizationVariableArgument;

export interface NormalizationCondition {
    readonly kind: 'Condition';
    readonly passingValue: boolean;
    readonly condition: string;
    readonly selections: readonly NormalizationSelection[];
}

export interface NormalizationClientExtension {
    readonly kind: 'ClientExtension';
    readonly selections: readonly NormalizationSelection[];
}

export type NormalizationField = NormalizationFlightField | NormalizationScalarField | NormalizationLinkedField;

export interface NormalizationInlineFragment {
    readonly kind: 'InlineFragment';
    readonly selections: readonly NormalizationSelection[];
    readonly type: string;
    readonly abstractKey?: string | null | undefined;
}

export interface NormalizationFragmentSpread {
    readonly kind: 'FragmentSpread';
    readonly fragment: NormalizationSplitOperation;
    readonly args?: readonly NormalizationArgument[] | null | undefined;
}

export interface NormalizationLinkedField {
    readonly kind: 'LinkedField';
    readonly alias?: string | null | undefined;
    readonly name: string;
    readonly storageKey?: string | null | undefined;
    readonly args?: readonly NormalizationArgument[] | null | undefined;
    readonly concreteType?: string | null | undefined;
    readonly plural: boolean;
    readonly selections: readonly NormalizationSelection[];
}

export interface NormalizationActorChange {
    readonly kind: 'ActorChange';
    readonly linkedField: NormalizationLinkedField;
}

export interface NormalizationModuleImport {
    readonly args?: readonly NormalizationArgument[] | null | undefined;
    readonly kind: 'ModuleImport';
    readonly documentName: string;
    readonly fragmentPropName: string;
    readonly fragmentName: string;
    readonly componentModuleProvider?: () => unknown | Promise<unknown> | JSResourceReference<unknown>;
    readonly operationModuleProvider?: () =>
        | NormalizationRootNode
        | Promise<NormalizationRootNode>
        | JSResourceReference<NormalizationRootNode>;
}

export interface NormalizationListValueArgument {
    readonly kind: 'ListValue';
    readonly name: string;
    readonly items: ReadonlyArray<NormalizationArgument | null>;
}

export interface NormalizationLiteralArgument {
    readonly kind: 'Literal';
    readonly name: string;
    readonly type?: string | null | undefined;
    readonly value: any;
}

export interface NormalizationLocalArgumentDefinition {
    readonly kind: 'LocalArgument';
    readonly name: string;
    readonly defaultValue: any;
}

export type NormalizationNode =
    | NormalizationClientExtension
    | NormalizationCondition
    | NormalizationDefer
    | NormalizationInlineFragment
    | NormalizationLinkedField
    | NormalizationOperation
    | NormalizationSplitOperation
    | NormalizationStream;

export interface NormalizationScalarField {
    readonly kind: 'ScalarField';
    readonly alias?: string | null | undefined;
    readonly name: string;
    readonly args?: readonly NormalizationArgument[] | null | undefined;
    readonly storageKey?: string | null | undefined;
}

export interface NormalizationFlightField {
    readonly kind: 'FlightField';
    readonly alias?: string | null | undefined;
    readonly name: string;
    readonly args?: readonly NormalizationArgument[] | null | undefined;
    readonly storageKey: string | null | undefined;
}

export interface NormalizationClientComponent {
    readonly args?: readonly NormalizationArgument[] | null | undefined;
    readonly kind: 'ClientComponent';
    readonly fragment: NormalizationNode;
}

export interface NormalizationTypeDiscriminator {
    readonly kind: 'TypeDiscriminator';
    readonly abstractKey: string;
}

export type NormalizationSelection =
    | NormalizationCondition
    | NormalizationClientComponent
    | NormalizationClientExtension
    | NormalizationDefer
    | NormalizationField
    | NormalizationFlightField
    | NormalizationFragmentSpread
    | NormalizationHandle
    | NormalizationInlineFragment
    | NormalizationModuleImport
    | NormalizationStream
    | NormalizationActorChange
    | NormalizationTypeDiscriminator;

export interface NormalizationSplitOperation {
    readonly argumentDefinitions?: readonly NormalizationLocalArgumentDefinition[];
    readonly kind: 'SplitOperation';
    readonly name: string;
    readonly metadata: { readonly [key: string]: unknown } | null | undefined;
    readonly selections: readonly NormalizationSelection[];
}

export interface NormalizationStream {
    readonly if: string | null;
    readonly kind: 'Stream';
    readonly label: string;
    readonly selections: readonly NormalizationSelection[];
}

export interface NormalizationDefer {
    readonly if: string | null;
    readonly kind: 'Defer';
    readonly label: string;
    readonly selections: readonly NormalizationSelection[];
}

export interface NormalizationVariableArgument {
    readonly kind: 'Variable';
    readonly name: string;
    readonly type?: string | null | undefined;
    readonly variableName: string;
}

export interface NormalizationObjectValueArgument {
    readonly kind: 'ObjectValue';
    readonly name: string;
    readonly fields: readonly NormalizationArgument[];
}

export type NormalizationSelectableNode =
    | NormalizationDefer
    | NormalizationLinkedField
    | NormalizationOperation
    | NormalizationSplitOperation
    | NormalizationStream;

export type NormalizationRootNode = ConcreteRequest | NormalizationSplitOperation;