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

import * as vscode from 'vscode';
import * as Proto from './protocol';
import BufferSyncSupport from './tsServer/bufferSyncSupport';
import { ExecutionTarget } from './tsServer/server';
import { TypeScriptVersion } from './tsServer/versionProvider';
import API from './utils/api';
import { TypeScriptServiceConfiguration } from './utils/configuration';
import { PluginManager } from './utils/plugins';
import { TelemetryReporter } from './utils/telemetry';

export enum ServerType {
	Syntax = 'syntax',
	Semantic = 'semantic',
}

export namespace ServerResponse {

	export class Cancelled {
		public readonly type = 'cancelled';

		constructor(
			public readonly reason: string
		) { }
	}

	export const NoContent = { type: 'noContent' } as const;

	export type Response<T extends Proto.Response> = T | Cancelled | typeof NoContent;
}

interface StandardTsServerRequests {
	'applyCodeActionCommand': [Proto.ApplyCodeActionCommandRequestArgs, Proto.ApplyCodeActionCommandResponse];
	'completionEntryDetails': [Proto.CompletionDetailsRequestArgs, Proto.CompletionDetailsResponse];
	'completionInfo': [Proto.CompletionsRequestArgs, Proto.CompletionInfoResponse];
	'completions': [Proto.CompletionsRequestArgs, Proto.CompletionsResponse];
	'configure': [Proto.ConfigureRequestArguments, Proto.ConfigureResponse];
	'definition': [Proto.FileLocationRequestArgs, Proto.DefinitionResponse];
	'definitionAndBoundSpan': [Proto.FileLocationRequestArgs, Proto.DefinitionInfoAndBoundSpanResponse];
	'docCommentTemplate': [Proto.FileLocationRequestArgs, Proto.DocCommandTemplateResponse];
	'documentHighlights': [Proto.DocumentHighlightsRequestArgs, Proto.DocumentHighlightsResponse];
	'format': [Proto.FormatRequestArgs, Proto.FormatResponse];
	'formatonkey': [Proto.FormatOnKeyRequestArgs, Proto.FormatResponse];
	'getApplicableRefactors': [Proto.GetApplicableRefactorsRequestArgs, Proto.GetApplicableRefactorsResponse];
	'getCodeFixes': [Proto.CodeFixRequestArgs, Proto.CodeFixResponse];
	'getCombinedCodeFix': [Proto.GetCombinedCodeFixRequestArgs, Proto.GetCombinedCodeFixResponse];
	'getEditsForFileRename': [Proto.GetEditsForFileRenameRequestArgs, Proto.GetEditsForFileRenameResponse];
	'getEditsForRefactor': [Proto.GetEditsForRefactorRequestArgs, Proto.GetEditsForRefactorResponse];
	'getOutliningSpans': [Proto.FileRequestArgs, Proto.OutliningSpansResponse];
	'getSupportedCodeFixes': [null, Proto.GetSupportedCodeFixesResponse];
	'implementation': [Proto.FileLocationRequestArgs, Proto.ImplementationResponse];
	'jsxClosingTag': [Proto.JsxClosingTagRequestArgs, Proto.JsxClosingTagResponse];
	'navto': [Proto.NavtoRequestArgs, Proto.NavtoResponse];
	'navtree': [Proto.FileRequestArgs, Proto.NavTreeResponse];
	'organizeImports': [Proto.OrganizeImportsRequestArgs, Proto.OrganizeImportsResponse];
	'projectInfo': [Proto.ProjectInfoRequestArgs, Proto.ProjectInfoResponse];
	'quickinfo': [Proto.FileLocationRequestArgs, Proto.QuickInfoResponse];
	'references': [Proto.FileLocationRequestArgs, Proto.ReferencesResponse];
	'rename': [Proto.RenameRequestArgs, Proto.RenameResponse];
	'selectionRange': [Proto.SelectionRangeRequestArgs, Proto.SelectionRangeResponse];
	'signatureHelp': [Proto.SignatureHelpRequestArgs, Proto.SignatureHelpResponse];
	'typeDefinition': [Proto.FileLocationRequestArgs, Proto.TypeDefinitionResponse];
	'updateOpen': [Proto.UpdateOpenRequestArgs, Proto.Response];
	'prepareCallHierarchy': [Proto.FileLocationRequestArgs, Proto.PrepareCallHierarchyResponse];
	'provideCallHierarchyIncomingCalls': [Proto.FileLocationRequestArgs, Proto.ProvideCallHierarchyIncomingCallsResponse];
	'provideCallHierarchyOutgoingCalls': [Proto.FileLocationRequestArgs, Proto.ProvideCallHierarchyOutgoingCallsResponse];
	'fileReferences': [Proto.FileRequestArgs, Proto.FileReferencesResponse];
}

interface NoResponseTsServerRequests {
	'open': [Proto.OpenRequestArgs, null];
	'close': [Proto.FileRequestArgs, null];
	'change': [Proto.ChangeRequestArgs, null];
	'compilerOptionsForInferredProjects': [Proto.SetCompilerOptionsForInferredProjectsArgs, null];
	'reloadProjects': [null, null];
	'configurePlugin': [Proto.ConfigurePluginRequest, Proto.ConfigurePluginResponse];
}

interface AsyncTsServerRequests {
	'geterr': [Proto.GeterrRequestArgs, Proto.Response];
	'geterrForProject': [Proto.GeterrForProjectRequestArgs, Proto.Response];
}

export type TypeScriptRequests = StandardTsServerRequests & NoResponseTsServerRequests & AsyncTsServerRequests;

export type ExecConfig = {
	readonly lowPriority?: boolean;
	readonly nonRecoverable?: boolean;
	readonly cancelOnResourceChange?: vscode.Uri;
	readonly executionTarget?: ExecutionTarget;
};

export enum ClientCapability {
	/**
	 * Basic syntax server. All clients should support this.
	 */
	Syntax,

	/**
	 * Advanced syntax server that can provide single file IntelliSense.
	 */
	EnhancedSyntax,

	/**
	 * Complete, multi-file semantic server
	 */
	Semantic,
}

export class ClientCapabilities {
	private readonly capabilities: ReadonlySet<ClientCapability>;

	constructor(...capabilities: ClientCapability[]) {
		this.capabilities = new Set(capabilities);
	}

	public has(capability: ClientCapability): boolean {
		return this.capabilities.has(capability);
	}
}

export interface ITypeScriptServiceClient {
	/**
	 * Convert a resource (VS Code) to a normalized path (TypeScript).
	 *
	 * Does not try handling case insensitivity.
	 */
	normalizedPath(resource: vscode.Uri): string | undefined;

	/**
	 * Map a resource to a normalized path
	 *
	 * This will attempt to handle case insensitivity.
	 */
	toPath(resource: vscode.Uri): string | undefined;

	/**
	 * Convert a path to a resource.
	 */
	toResource(filepath: string): vscode.Uri;

	/**
	 * Tries to ensure that a vscode document is open on the TS server.
	 *
	 * @return The normalized path or `undefined` if the document is not open on the server.
	 */
	toOpenedFilePath(document: vscode.TextDocument, options?: {
		suppressAlertOnFailure?: boolean
	}): string | undefined;

	/**
	 * Checks if `resource` has a given capability.
	 */
	hasCapabilityForResource(resource: vscode.Uri, capability: ClientCapability): boolean;

	getWorkspaceRootForResource(resource: vscode.Uri): string | undefined;

	readonly onTsServerStarted: vscode.Event<{ version: TypeScriptVersion, usedApiVersion: API }>;
	readonly onProjectLanguageServiceStateChanged: vscode.Event<Proto.ProjectLanguageServiceStateEventBody>;
	readonly onDidBeginInstallTypings: vscode.Event<Proto.BeginInstallTypesEventBody>;
	readonly onDidEndInstallTypings: vscode.Event<Proto.EndInstallTypesEventBody>;
	readonly onTypesInstallerInitializationFailed: vscode.Event<Proto.TypesInstallerInitializationFailedEventBody>;

	readonly capabilities: ClientCapabilities;
	readonly onDidChangeCapabilities: vscode.Event<void>;

	onReady(f: () => void): Promise<void>;

	showVersionPicker(): void;

	readonly apiVersion: API;

	readonly pluginManager: PluginManager;
	readonly configuration: TypeScriptServiceConfiguration;
	readonly bufferSyncSupport: BufferSyncSupport;
	readonly telemetryReporter: TelemetryReporter;

	execute<K extends keyof StandardTsServerRequests>(
		command: K,
		args: StandardTsServerRequests[K][0],
		token: vscode.CancellationToken,
		config?: ExecConfig
	): Promise<ServerResponse.Response<StandardTsServerRequests[K][1]>>;

	executeWithoutWaitingForResponse<K extends keyof NoResponseTsServerRequests>(
		command: K,
		args: NoResponseTsServerRequests[K][0]
	): void;

	executeAsync<K extends keyof AsyncTsServerRequests>(
		command: K,
		args: AsyncTsServerRequests[K][0],
		token: vscode.CancellationToken
	): Promise<ServerResponse.Response<Proto.Response>>;

	/**
	 * Cancel on going geterr requests and re-queue them after `f` has been evaluated.
	 */
	interruptGetErr<R>(f: () => R): R;
}