// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

'use strict';

import { IndentAction } from 'vscode';

export const MULTILINE_SEPARATOR_INDENT_REGEX = /^(?!\s+\\)[^#\n]+\\$/;

/**

* This does not handle all cases. However, it does handle nearly all usage.

* Here's what it does not cover:

* - the statement is split over multiple lines (and hence the ":" is on a different line)

* - the code block is inlined (after the ":")

* - there are multiple statements on the line (separated by semicolons)

* Also note that `lambda` is purposefully excluded.

*/

export const INCREASE_INDENT_REGEX = /^\s*(?:(?:async|class|def|elif|except|for|if|while|with)\b.*|(else|finally|try))\s*:\s*(#.*)?$/;

export const DECREASE_INDENT_REGEX = /^\s*(?:else|finally|(?:elif|except)\b.*)\s*:\s*(#.*)?$/;

export const OUTDENT_ONENTER_REGEX = /^\s*(?:break|continue|pass|(?:raise|return)\b.*)\s*(#.*)?$/;

export function getLanguageConfiguration() {

return {

onEnterRules: [

{

beforeText: MULTILINE_SEPARATOR_INDENT_REGEX,

action: { indentAction: IndentAction.Indent }

},

{

beforeText: /^\s*#.*/,

afterText: /.+$/,

action: { indentAction: IndentAction.None, appendText: '# ' }

},

{

beforeText: OUTDENT_ONENTER_REGEX,

action: { indentAction: IndentAction.Outdent }

}

],

indentationRules: {

increaseIndentPattern: INCREASE_INDENT_REGEX,

decreaseIndentPattern: DECREASE_INDENT_REGEX

}

};

}