declare module monaco.languages.typescript {

    enum ModuleKind {
        None = 0,
        CommonJS = 1,
        AMD = 2,
        UMD = 3,
        System = 4,
        ES2015 = 5,
        ESNext = 99
    }

    enum JsxEmit {
        None = 0,
        Preserve = 1,
        React = 2,
        ReactNative = 3
    }
    enum NewLineKind {
        CarriageReturnLineFeed = 0,
        LineFeed = 1
    }

    enum ScriptTarget {
        ES3 = 0,
        ES5 = 1,
        ES2015 = 2,
        ES2016 = 3,
        ES2017 = 4,
        ES2018 = 5,
        ES2019 = 6,
        ES2020 = 7,
        ESNext = 99,
        JSON = 100,
        Latest = ESNext,
    }

    export enum ModuleResolutionKind {
        Classic = 1,
        NodeJs = 2
    }

    interface MapLike<T> {
        [index: string]: T;
    }

    type CompilerOptionsValue = string | number | boolean | (string | number)[] | string[] | MapLike<string[]> | null | undefined;
    interface CompilerOptions {
        allowJs?: boolean;
        allowSyntheticDefaultImports?: boolean;
        allowUmdGlobalAccess?: boolean;
        allowUnreachableCode?: boolean;
        allowUnusedLabels?: boolean;
        alwaysStrict?: boolean;
        baseUrl?: string;
        charset?: string;
        checkJs?: boolean;
        declaration?: boolean;
        declarationMap?: boolean;
        emitDeclarationOnly?: boolean;
        declarationDir?: string;
        disableSizeLimit?: boolean;
        disableSourceOfProjectReferenceRedirect?: boolean;
        downlevelIteration?: boolean;
        emitBOM?: boolean;
        emitDecoratorMetadata?: boolean;
        experimentalDecorators?: boolean;
        forceConsistentCasingInFileNames?: boolean;
        importHelpers?: boolean;
        inlineSourceMap?: boolean;
        inlineSources?: boolean;
        isolatedModules?: boolean;
        jsx?: JsxEmit;
        keyofStringsOnly?: boolean;
        lib?: string[];
        locale?: string;
        mapRoot?: string;
        maxNodeModuleJsDepth?: number;
        module?: ModuleKind;
        moduleResolution?: ModuleResolutionKind;
        newLine?: NewLineKind;
        noEmit?: boolean;
        noEmitHelpers?: boolean;
        noEmitOnError?: boolean;
        noErrorTruncation?: boolean;
        noFallthroughCasesInSwitch?: boolean;
        noImplicitAny?: boolean;
        noImplicitReturns?: boolean;
        noImplicitThis?: boolean;
        noStrictGenericChecks?: boolean;
        noUnusedLocals?: boolean;
        noUnusedParameters?: boolean;
        noImplicitUseStrict?: boolean;
        noLib?: boolean;
        noResolve?: boolean;
        out?: string;
        outDir?: string;
        outFile?: string;
        paths?: MapLike<string[]>;
        preserveConstEnums?: boolean;
        preserveSymlinks?: boolean;
        project?: string;
        reactNamespace?: string;
        jsxFactory?: string;
        composite?: boolean;
        removeComments?: boolean;
        rootDir?: string;
        rootDirs?: string[];
        skipLibCheck?: boolean;
        skipDefaultLibCheck?: boolean;
        sourceMap?: boolean;
        sourceRoot?: string;
        strict?: boolean;
        strictFunctionTypes?: boolean;
        strictBindCallApply?: boolean;
        strictNullChecks?: boolean;
        strictPropertyInitialization?: boolean;
        stripInternal?: boolean;
        suppressExcessPropertyErrors?: boolean;
        suppressImplicitAnyIndexErrors?: boolean;
        target?: ScriptTarget;
        traceResolution?: boolean;
        resolveJsonModule?: boolean;
        types?: string[];
        /** Paths used to compute primary types search locations */
        typeRoots?: string[];
        esModuleInterop?: boolean;
        useDefineForClassFields?: boolean;
        [option: string]: CompilerOptionsValue | undefined;
    }

    export interface DiagnosticsOptions {
        noSemanticValidation?: boolean;
        noSyntaxValidation?: boolean;
        noSuggestionDiagnostics?: boolean;
        diagnosticCodesToIgnore?: number[];
    }

    interface IExtraLib {
        content: string;
        version: number;
    }

    interface IExtraLibs {
        [path: string]: IExtraLib;
    }

    export interface LanguageServiceDefaults {
        /**
         * Get the current extra libs registered with the language service.
         */
        getExtraLibs(): IExtraLibs;

        /**
         * Add an additional source file to the language service. Use this
         * for typescript (definition) files that won't be loaded as editor
         * documents, like `jquery.d.ts`.
         *
         * @param content The file content
         * @param filePath An optional file path
         * @returns A disposable which will remove the file from the
         * language service upon disposal.
         */
        addExtraLib(content: string, filePath?: string): IDisposable;

        /**
         * Remove all existing extra libs and set the additional source
         * files to the language service. Use this for typescript definition
         * files that won't be loaded as editor documents, like `jquery.d.ts`.
         * @param libs An array of entries to register.
         */
        setExtraLibs(libs: { content: string; filePath?: string }[]): void;

        /**
         * Get current TypeScript compiler options for the language service.
         */
        getCompilerOptions(): CompilerOptions;

        /**
         * Set TypeScript compiler options.
         */
        setCompilerOptions(options: CompilerOptions): void;

        /**
         * Get the current diagnostics options for the language service.
         */
        getDiagnosticsOptions(): DiagnosticsOptions;

        /**
         * Configure whether syntactic and/or semantic validation should
         * be performed
         */
        setDiagnosticsOptions(options: DiagnosticsOptions): void;

        /**
         * No-op.
         */
        setMaximumWorkerIdleTime(value: number): void;

        /**
         * Configure if all existing models should be eagerly sync'd
         * to the worker on start or restart.
         */
        setEagerModelSync(value: boolean): void;

        /**
         * Get the current setting for whether all existing models should be eagerly sync'd
         * to the worker on start or restart.
         */
        getEagerModelSync(): boolean;
    }

    export interface TypeScriptWorker {
        getCompilationSettings(): CompilerOptions;
        getScriptFileNames(): string[];
        getScriptVersion(fileName: string): string;
        getScriptKind(fileName: string): ts.ScriptKind;
        getCurrentDirectory(): string;
        getDefaultLibFileName(options: CompilerOptions): string;
        isDefaultLibFileName(fileName: string): boolean;
        getSyntacticDiagnostics(fileName: string): Promise<ts.Diagnostic[]>;
        getSemanticDiagnostics(fileName: string): Promise<ts.Diagnostic[]>;
        getSuggestionDiagnostics(fileName: string): Promise<ts.DiagnosticWithLocation[]>;
        getCompilerOptionsDiagnostics(fileName: string): Promise<ts.Diagnostic[]>;
        getCompletionsAtPosition(fileName: string, position: number): Promise<ts.CompletionInfo | undefined>;
        getCompletionEntryDetails(fileName: string, position: number, entry: string): Promise<ts.CompletionEntryDetails | undefined>;
        getSignatureHelpItems(fileName: string, position: number): Promise<ts.SignatureHelpItems | undefined>;
        getQuickInfoAtPosition(fileName: string, position: number): Promise<ts.QuickInfo | undefined>;
        getOccurrencesAtPosition(fileName: string, position: number): Promise<ReadonlyArray<ts.ReferenceEntry> | undefined>;
        getDefinitionAtPosition(fileName: string, position: number): Promise<ReadonlyArray<ts.DefinitionInfo> | undefined>;
        getReferencesAtPosition(fileName: string, position: number): Promise<ts.ReferenceEntry[] | undefined>;
        getNavigationBarItems(fileName: string): Promise<ts.NavigationBarItem[]>;
        getFormattingEditsForDocument(fileName: string, options: ts.FormatCodeOptions): Promise<ts.TextChange[]>;
        getFormattingEditsForRange(fileName: string, start: number, end: number, options: ts.FormatCodeOptions): Promise<ts.TextChange[]>;
        getFormattingEditsAfterKeystroke(fileName: string, postion: number, ch: string, options: ts.FormatCodeOptions): Promise<ts.TextChange[]>;
        findRenameLocations(fileName: string, positon: number, findInStrings: boolean, findInComments: boolean, providePrefixAndSuffixTextForRename: boolean): Promise<readonly ts.RenameLocation[] | undefined>;
        getRenameInfo(fileName: string, positon: number, options: ts.RenameInfoOptions): Promise<ts.RenameInfo>;
        getEmitOutput(fileName: string): Promise<ts.EmitOutput>;
        getCodeFixesAtPosition(fileName: string, start: number, end: number, errorCodes: number[], formatOptions: ts.FormatCodeOptions): Promise<ReadonlyArray<ts.CodeFixAction>>;
        updateExtraLibs(extraLibs: IExtraLibs): void;
    }

    export var typescriptVersion: string;

    export var typescriptDefaults: LanguageServiceDefaults;
    export var javascriptDefaults: LanguageServiceDefaults;

    export var getTypeScriptWorker: () => Promise<(first: Uri, ...more: Uri[]) => Promise<TypeScriptWorker>>;
    export var getJavaScriptWorker: () => Promise<(first: Uri, ...more: Uri[]) => Promise<TypeScriptWorker>>;
}

/**
 * Additional types copied from `typescript`.
 */
declare module monaco.languages.typescript.ts {
    /**
     * A linked list of formatted diagnostic messages to be used as part of a multiline message.
     * It is built from the bottom up, leaving the head to be the "main" diagnostic.
     */
    interface DiagnosticMessageChain {
        messageText: string;
        category: DiagnosticCategory;
        code: number;
        next?: DiagnosticMessageChain[];
    }
    interface Diagnostic extends DiagnosticRelatedInformation {
        /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
        reportsUnnecessary?: {};
        source?: string;
        relatedInformation?: DiagnosticRelatedInformation[];
    }
    interface DiagnosticRelatedInformation {
        category: DiagnosticCategory;
        code: number;
        /** TypeScriptWorker removes this to avoid serializing circular JSON structures. */
        file: undefined;
        start: number | undefined;
        length: number | undefined;
        messageText: string | DiagnosticMessageChain;
    }
    interface DiagnosticWithLocation extends Diagnostic {
        /** TypeScriptWorker removes this to avoid serializing circular JSON structures. */
        file: undefined;
        start: number;
        length: number;
    }
    // Must be a const enum because this module doesn't exist at runtime
    const enum DiagnosticCategory {
        Warning = 0,
        Error = 1,
        Suggestion = 2,
        Message = 3
    }
    // Must be a const enum because this module doesn't exist at runtime
    const enum ScriptKind {
        Unknown = 0,
        JS = 1,
        JSX = 2,
        TS = 3,
        TSX = 4,
        External = 5,
        JSON = 6,
        /**
         * Used on extensions that doesn't define the ScriptKind but the content defines it.
         * Deferred extensions are going to be included in all project contexts.
         */
        Deferred = 7
    }
    interface TextSpan {
        start: number;
        length: number;
    }

    interface EmitOutput {
        outputFiles: OutputFile[];
        emitSkipped: boolean;
    }
    interface OutputFile {
        name: string;
        writeByteOrderMark: boolean;
        text: string;
    }

    /**
     * Navigation bar interface designed for visual studio's dual-column layout.
     * This does not form a proper tree.
     * The navbar is returned as a list of top-level items, each of which has a list of child items.
     * Child items always have an empty array for their `childItems`.
     */
    interface NavigationBarItem {
        text: string;
        kind: ScriptElementKind;
        kindModifiers: string;
        spans: TextSpan[];
        childItems: NavigationBarItem[];
        indent: number;
        bolded: boolean;
        grayed: boolean;
    }
    interface TextChange {
        span: TextSpan;
        newText: string;
    }
    interface FileTextChanges {
        fileName: string;
        textChanges: readonly TextChange[];
        isNewFile?: boolean;
    }
    interface CodeAction {
        /** Description of the code action to display in the UI of the editor */
        description: string;
        /** Text changes to apply to each file as part of the code action */
        changes: FileTextChanges[];
        /**
         * If the user accepts the code fix, the editor should send the action back in a `applyAction` request.
         * This allows the language service to have side effects (e.g. installing dependencies) upon a code fix.
         */
        commands?: CodeActionCommand[];
    }
    interface CodeFixAction extends CodeAction {
        /** Short name to identify the fix, for use by telemetry. */
        fixName: string;
        /**
         * If present, one may call 'getCombinedCodeFix' with this fixId.
         * This may be omitted to indicate that the code fix can't be applied in a group.
         */
        fixId?: {};
        fixAllDescription?: string;
    }
    type CodeActionCommand = InstallPackageAction;
    interface InstallPackageAction {
    }
    interface DocumentSpan {
        textSpan: TextSpan;
        fileName: string;
        /**
         * If the span represents a location that was remapped (e.g. via a .d.ts.map file),
         * then the original filename and span will be specified here
         */
        originalTextSpan?: TextSpan;
        originalFileName?: string;
        /**
         * If DocumentSpan.textSpan is the span for name of the declaration,
         * then this is the span for relevant declaration
         */
        contextSpan?: TextSpan;
        originalContextSpan?: TextSpan;
    }
    interface RenameLocation extends DocumentSpan {
        readonly prefixText?: string;
        readonly suffixText?: string;
    }
    interface ReferenceEntry extends DocumentSpan {
        isWriteAccess: boolean;
        isDefinition: boolean;
        isInString?: true;
    }
    // Must be a const enum because this module doesn't exist at runtime
    const enum IndentStyle {
        None = 0,
        Block = 1,
        Smart = 2
    }
    interface EditorOptions {
        BaseIndentSize?: number;
        IndentSize: number;
        TabSize: number;
        NewLineCharacter: string;
        ConvertTabsToSpaces: boolean;
        IndentStyle: IndentStyle;
    }
    interface FormatCodeOptions extends EditorOptions {
        InsertSpaceAfterCommaDelimiter: boolean;
        InsertSpaceAfterSemicolonInForStatements: boolean;
        InsertSpaceBeforeAndAfterBinaryOperators: boolean;
        InsertSpaceAfterConstructor?: boolean;
        InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
        InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
        InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces?: boolean;
        InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
        InsertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
        InsertSpaceAfterTypeAssertion?: boolean;
        InsertSpaceBeforeFunctionParenthesis?: boolean;
        PlaceOpenBraceOnNewLineForFunctions: boolean;
        PlaceOpenBraceOnNewLineForControlBlocks: boolean;
        insertSpaceBeforeTypeAnnotation?: boolean;
    }
    interface DefinitionInfo extends DocumentSpan {
        kind: ScriptElementKind;
        name: string;
        containerKind: ScriptElementKind;
        containerName: string;
    }
    interface SymbolDisplayPart {
        text: string;
        kind: string;
    }
    interface JSDocTagInfo {
        name: string;
        text?: string;
    }
    interface QuickInfo {
        kind: ScriptElementKind;
        kindModifiers: string;
        textSpan: TextSpan;
        displayParts?: SymbolDisplayPart[];
        documentation?: SymbolDisplayPart[];
        tags?: JSDocTagInfo[];
    }
    type RenameInfo = RenameInfoSuccess | RenameInfoFailure;
    interface RenameInfoSuccess {
        canRename: true;
        /**
         * File or directory to rename.
         * If set, `getEditsForFileRename` should be called instead of `findRenameLocations`.
         */
        fileToRename?: string;
        displayName: string;
        fullDisplayName: string;
        kind: ScriptElementKind;
        kindModifiers: string;
        triggerSpan: TextSpan;
    }
    interface RenameInfoFailure {
        canRename: false;
        localizedErrorMessage: string;
    }
    interface RenameInfoOptions {
        readonly allowRenameOfImportPath?: boolean;
    }
    interface SignatureHelpParameter {
        name: string;
        documentation: SymbolDisplayPart[];
        displayParts: SymbolDisplayPart[];
        isOptional: boolean;
    }
    /**
     * Represents a single signature to show in signature help.
     * The id is used for subsequent calls into the language service to ask questions about the
     * signature help item in the context of any documents that have been updated.  i.e. after
     * an edit has happened, while signature help is still active, the host can ask important
     * questions like 'what parameter is the user currently contained within?'.
     */
    interface SignatureHelpItem {
        isVariadic: boolean;
        prefixDisplayParts: SymbolDisplayPart[];
        suffixDisplayParts: SymbolDisplayPart[];
        separatorDisplayParts: SymbolDisplayPart[];
        parameters: SignatureHelpParameter[];
        documentation: SymbolDisplayPart[];
        tags: JSDocTagInfo[];
    }
    /**
     * Represents a set of signature help items, and the preferred item that should be selected.
     */
    interface SignatureHelpItems {
        items: SignatureHelpItem[];
        applicableSpan: TextSpan;
        selectedItemIndex: number;
        argumentIndex: number;
        argumentCount: number;
    }
    interface CompletionInfo {
        /** Not true for all global completions. This will be true if the enclosing scope matches a few syntax kinds. See `isSnippetScope`. */
        isGlobalCompletion: boolean;
        isMemberCompletion: boolean;
        /**
         * true when the current location also allows for a new identifier
         */
        isNewIdentifierLocation: boolean;
        entries: CompletionEntry[];
    }
    interface CompletionEntry {
        name: string;
        kind: ScriptElementKind;
        kindModifiers?: string;
        sortText: string;
        insertText?: string;
        /**
         * An optional span that indicates the text to be replaced by this completion item.
         * If present, this span should be used instead of the default one.
         * It will be set if the required span differs from the one generated by the default replacement behavior.
         */
        replacementSpan?: TextSpan;
        hasAction?: true;
        source?: string;
        isRecommended?: true;
    }
    interface CompletionEntryDetails {
        name: string;
        kind: ScriptElementKind;
        kindModifiers: string;
        displayParts: SymbolDisplayPart[];
        documentation?: SymbolDisplayPart[];
        tags?: JSDocTagInfo[];
        codeActions?: CodeAction[];
        source?: SymbolDisplayPart[];
    }
    // Must be a const enum because this module doesn't exist at runtime
    const enum ScriptElementKind {
        unknown = "",
        warning = "warning",
        /** predefined type (void) or keyword (class) */
        keyword = "keyword",
        /** top level script node */
        scriptElement = "script",
        /** module foo {} */
        moduleElement = "module",
        /** class X {} */
        classElement = "class",
        /** var x = class X {} */
        localClassElement = "local class",
        /** interface Y {} */
        interfaceElement = "interface",
        /** type T = ... */
        typeElement = "type",
        /** enum E */
        enumElement = "enum",
        enumMemberElement = "enum member",
        /**
         * Inside module and script only
         * const v = ..
         */
        variableElement = "var",
        /** Inside function */
        localVariableElement = "local var",
        /**
         * Inside module and script only
         * function f() { }
         */
        functionElement = "function",
        /** Inside function */
        localFunctionElement = "local function",
        /** class X { [public|private]* foo() {} } */
        memberFunctionElement = "method",
        /** class X { [public|private]* [get|set] foo:number; } */
        memberGetAccessorElement = "getter",
        memberSetAccessorElement = "setter",
        /**
         * class X { [public|private]* foo:number; }
         * interface Y { foo:number; }
         */
        memberVariableElement = "property",
        /** class X { constructor() { } } */
        constructorImplementationElement = "constructor",
        /** interface Y { ():number; } */
        callSignatureElement = "call",
        /** interface Y { []:number; } */
        indexSignatureElement = "index",
        /** interface Y { new():Y; } */
        constructSignatureElement = "construct",
        /** function foo(*Y*: string) */
        parameterElement = "parameter",
        typeParameterElement = "type parameter",
        primitiveType = "primitive type",
        label = "label",
        alias = "alias",
        constElement = "const",
        letElement = "let",
        directory = "directory",
        externalModuleName = "external module name",
        /**
         * <JsxTagName attribute1 attribute2={0} />
         */
        jsxAttribute = "JSX attribute",
        /** String literal */
        string = "string"
    }
}