/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

declare module 'vscode' {

	// https://github.com/microsoft/vscode/issues/124024 @hediet

	export namespace languages {
		/**
		 * Registers an inline completion provider.
		 *
		 * Multiple providers can be registered for a language. In that case providers are asked in
		 * parallel and the results are merged. A failing provider (rejected promise or exception) will
		 * not cause a failure of the whole operation.
		 *
		 * @param selector A selector that defines the documents this provider is applicable to.
		 * @param provider An inline completion provider.
		 * @param metadata Metadata about the provider.
		 * @return A {@link Disposable} that unregisters this provider when being disposed.
		 */
		export function registerInlineCompletionItemProvider(selector: DocumentSelector, provider: InlineCompletionItemProvider, metadata: InlineCompletionItemProviderMetadata): Disposable;
	}

	export interface InlineCompletionItem {
		/**
		 * If set to `true`, unopened closing brackets are removed and unclosed opening brackets are closed.
		 * Defaults to `false`.
		*/
		completeBracketPairs?: boolean;
	}

	export interface InlineCompletionItemProviderMetadata {
		/**
		 * Specifies a list of extension ids that this provider yields to if they return a result.
		 * If some inline completion provider registered by such an extension returns a result, this provider is not asked.
		 */
		yieldTo: string[];
	}

	export interface InlineCompletionItemProvider {
		/**
		 * @param completionItem The completion item that was shown.
		 * @param updatedInsertText The actual insert text (after brackets were fixed).
		 */
		// eslint-disable-next-line local/vscode-dts-provider-naming
		handleDidShowCompletionItem?(completionItem: InlineCompletionItem, updatedInsertText: string): void;

		/**
		 * Is called when an inline completion item was accepted partially.
		 * @param acceptedLength The length of the substring of the inline completion that was accepted already.
		 */
		// eslint-disable-next-line local/vscode-dts-provider-naming
		handleDidPartiallyAcceptCompletionItem?(completionItem: InlineCompletionItem, acceptedLength: number): void;

		/**
		 * Is called when an inline completion item was accepted partially.
		 * @param info Additional info for the partial accepted trigger.
		 */
		// eslint-disable-next-line local/vscode-dts-provider-naming
		handleDidPartiallyAcceptCompletionItem?(completionItem: InlineCompletionItem, info: PartialAcceptInfo): void;
	}

	export interface PartialAcceptInfo {
		kind: PartialAcceptTriggerKind;
	}

	export enum PartialAcceptTriggerKind {
		Unknown = 0,
		Word = 1,
		Line = 2,
		Suggest = 3,
	}

	// When finalizing `commands`, make sure to add a corresponding constructor parameter.
	export interface InlineCompletionList {
		/**
		 * A list of commands associated with the inline completions of this list.
		 */
		commands?: Command[];

		/**
		 * When set and the user types a suggestion without derivating from it, the inline suggestion is not updated.
		 * Defaults to false (might change).
		 */
		enableForwardStability?: boolean;
	}
}
