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

import type { languages } from '../../fillers/monaco-editor-core';

export const conf: languages.LanguageConfiguration = {
	comments: {
		lineComment: '#'
	},
	brackets: [
		['{', '}'],
		['[', ']'],
		['(', ')']
	],
	autoClosingPairs: [
		{ open: '{', close: '}' },
		{ open: '[', close: ']' },
		{ open: '(', close: ')' },
		{ open: '"', close: '"' },
		{ open: "'", close: "'" },
		{ open: '`', close: '`' }
	],
	surroundingPairs: [
		{ open: '{', close: '}' },
		{ open: '[', close: ']' },
		{ open: '(', close: ')' },
		{ open: '"', close: '"' },
		{ open: "'", close: "'" },
		{ open: '`', close: '`' }
	]
};

export const language = <languages.IMonarchLanguage>{
	defaultToken: '',
	ignoreCase: true,
	tokenPostfix: '.shell',

	brackets: [
		{ token: 'delimiter.bracket', open: '{', close: '}' },
		{ token: 'delimiter.parenthesis', open: '(', close: ')' },
		{ token: 'delimiter.square', open: '[', close: ']' }
	],

	keywords: [
		'if',
		'then',
		'do',
		'else',
		'elif',
		'while',
		'until',
		'for',
		'in',
		'esac',
		'fi',
		'fin',
		'fil',
		'done',
		'exit',
		'set',
		'unset',
		'export',
		'function'
	],

	builtins: [
		'ab',
		'awk',
		'bash',
		'beep',
		'cat',
		'cc',
		'cd',
		'chown',
		'chmod',
		'chroot',
		'clear',
		'cp',
		'curl',
		'cut',
		'diff',
		'echo',
		'find',
		'gawk',
		'gcc',
		'get',
		'git',
		'grep',
		'hg',
		'kill',
		'killall',
		'ln',
		'ls',
		'make',
		'mkdir',
		'openssl',
		'mv',
		'nc',
		'node',
		'npm',
		'ping',
		'ps',
		'restart',
		'rm',
		'rmdir',
		'sed',
		'service',
		'sh',
		'shopt',
		'shred',
		'source',
		'sort',
		'sleep',
		'ssh',
		'start',
		'stop',
		'su',
		'sudo',
		'svn',
		'tee',
		'telnet',
		'top',
		'touch',
		'vi',
		'vim',
		'wall',
		'wc',
		'wget',
		'who',
		'write',
		'yes',
		'zsh'
	],

	// we include these common regular expressions
	symbols: /[=><!~?&|+\-*\/\^;\.,]+/,

	// The main tokenizer for our languages
	tokenizer: {
		root: [
			{ include: '@whitespace' },

			[
				/[a-zA-Z]\w*/,
				{
					cases: {
						'@keywords': 'keyword',
						'@builtins': 'type.identifier',
						'@default': ''
					}
				}
			],

			{ include: '@strings' },
			{ include: '@parameters' },
			{ include: '@heredoc' },

			[/[{}\[\]()]/, '@brackets'],

			[/-+\w+/, 'attribute.name'],

			[/@symbols/, 'delimiter'],

			{ include: '@numbers' },

			[/[,;]/, 'delimiter']
		],

		whitespace: [
			[/\s+/, 'white'],
			[/(^#!.*$)/, 'metatag'],
			[/(^#.*$)/, 'comment']
		],

		numbers: [
			[/\d*\.\d+([eE][\-+]?\d+)?/, 'number.float'],
			[/0[xX][0-9a-fA-F_]*[0-9a-fA-F]/, 'number.hex'],
			[/\d+/, 'number']
		],

		// Recognize strings, including those broken across lines
		strings: [
			[/'/, 'string', '@stringBody'],
			[/"/, 'string', '@dblStringBody']
		],
		stringBody: [
			[/'/, 'string', '@popall'],
			[/./, 'string']
		],
		dblStringBody: [
			[/"/, 'string', '@popall'],
			[/./, 'string']
		],

		heredoc: [
			[
				/(<<[-<]?)(\s*)(['"`]?)([\w\-]+)(['"`]?)/,
				[
					'constants',
					'white',
					'string.heredoc.delimiter',
					'string.heredoc',
					'string.heredoc.delimiter'
				]
			]
		],

		parameters: [
			[/\$\d+/, 'variable.predefined'],
			[/\$\w+/, 'variable'],
			[/\$[*@#?\-$!0_]/, 'variable'],
			[/\$'/, 'variable', '@parameterBodyQuote'],
			[/\$"/, 'variable', '@parameterBodyDoubleQuote'],
			[/\$\(/, 'variable', '@parameterBodyParen'],
			[/\$\{/, 'variable', '@parameterBodyCurlyBrace']
		],
		parameterBodyQuote: [
			[/[^#:%*@\-!_']+/, 'variable'],
			[/[#:%*@\-!_]/, 'delimiter'],
			[/[']/, 'variable', '@pop']
		],
		parameterBodyDoubleQuote: [
			[/[^#:%*@\-!_"]+/, 'variable'],
			[/[#:%*@\-!_]/, 'delimiter'],
			[/["]/, 'variable', '@pop']
		],
		parameterBodyParen: [
			[/[^#:%*@\-!_)]+/, 'variable'],
			[/[#:%*@\-!_]/, 'delimiter'],
			[/[)]/, 'variable', '@pop']
		],
		parameterBodyCurlyBrace: [
			[/[^#:%*@\-!_}]+/, 'variable'],
			[/[#:%*@\-!_]/, 'delimiter'],
			[/[}]/, 'variable', '@pop']
		]
	}
};