/*---------------------------------------------------------------------------------------------
 *  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: ')' }
	],
	surroundingPairs: [
		{ open: '[', close: ']' },
		{ open: '<', close: '>' },
		{ open: '(', close: ')' }
	]
};

export const language = <languages.IMonarchLanguage>{
	defaultToken: '',
	tokenPostfix: '.pla',

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

	keywords: [
		'.i',
		'.o',
		'.mv',
		'.ilb',
		'.ob',
		'.label',
		'.type',
		'.phase',
		'.pair',
		'.symbolic',
		'.symbolic-output',
		'.kiss',
		'.p',
		'.e',
		'.end'
	],

	// regular expressions
	comment: /#.*$/,
	identifier: /[a-zA-Z]+[a-zA-Z0-9_\-]*/,
	plaContent: /[01\-~\|]+/,

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

			// keyword
			[
				/\.([a-zA-Z_\-]+)/,
				{
					cases: {
						'@eos': { token: 'keyword.$1' },
						'@keywords': {
							cases: {
								'.type': { token: 'keyword.$1', next: '@type' },
								'@default': { token: 'keyword.$1', next: '@keywordArg' }
							}
						},
						'@default': { token: 'keyword.$1' }
					}
				}
			],

			// identifiers
			[/@identifier/, 'identifier'],

			// PLA row
			[/@plaContent/, 'string']
		],

		whitespace: [[/[ \t\r\n]+/, '']],

		type: [{ include: '@whitespace' }, [/\w+/, { token: 'type', next: '@pop' }]],

		keywordArg: [
			// whitespace
			[
				/[ \t\r\n]+/,
				{
					cases: {
						'@eos': { token: '', next: '@pop' },
						'@default': ''
					}
				}
			],

			// comments
			[/@comment/, 'comment', '@pop'],

			// brackets
			[
				/[<>()\[\]]/,
				{
					cases: {
						'@eos': { token: '@brackets', next: '@pop' },
						'@default': '@brackets'
					}
				}
			],

			// numbers
			[
				/\-?\d+/,
				{
					cases: {
						'@eos': { token: 'number', next: '@pop' },
						'@default': 'number'
					}
				}
			],

			// identifiers
			[
				/@identifier/,
				{
					cases: {
						'@eos': { token: 'identifier', next: '@pop' },
						'@default': 'identifier'
					}
				}
			],

			// delimiter
			[
				/[;=]/,
				{
					cases: {
						'@eos': { token: 'delimiter', next: '@pop' },
						'@default': 'delimiter'
					}
				}
			]
		]
	}
};