import * as monacoEditor from 'monaco-editor/esm/vs/editor/editor.api';

const languageConfiguration: monacoEditor.languages.LanguageConfiguration = {
    // the default separators except `@$`
    wordPattern: /(-?\d*\.\d\w*)|([^\`\~\!\#\%\^\&\*\(\)\-\=\+\[\{\]\}\\\|\;\:\'\"\,\.\<\>\/\?\s]+)/g,
    comments: {
        lineComment: '//',
        blockComment: ['/*', '*/'],
    },
    brackets: [
        ['{', '}'],
        ['[', ']'],
        ['(', ')'],
    ],
    autoClosingPairs: [
        { open: '{', close: '}' },
        { open: '[', close: ']' },
        { open: '(', close: ')' },
        { open: '"', close: '"' },
        { open: '\'', close: '\'' },
    ],
    surroundingPairs: [
        { open: '{', close: '}' },
        { open: '[', close: ']' },
        { open: '(', close: ')' },
        { open: '"', close: '"' },
        { open: '\'', close: '\'' },
        { open: '<', close: '>' },
    ],
    folding: {
        markers: {
            start: new RegExp("^\\s*//\\s*(?:(?:#?region\\b)|(?:<editor-fold\\b))"),
            end: new RegExp("^\\s*//\\s*(?:(?:#?endregion\\b)|(?:</editor-fold>))")
        }
    }
};
const tokensProviderConfig: monacoEditor.languages.IMonarchLanguage = {
    defaultToken: '',
    tokenPostfix: '.groovy',
    keywords: [
        'abstract', 'continue', 'for', 'new', 'switch', 'assert', 'default',
        'goto', 'package', 'synchronized', 'boolean', 'do', 'if', 'private',
        'this', 'break', 'double', 'implements', 'protected', 'throw', 'byte',
        'else', 'import', 'public', 'throws', 'case', 'enum', 'instanceof', 'return',
        'transient', 'catch', 'extends', 'int', 'short', 'try', 'char', 'final',
        'interface', 'static', 'void', 'class', 'finally', 'long', 'strictfp',
        'volatile', 'const', 'float', 'native', 'super', 'while', 'true', 'false', 'as',
        'def', 'in', 'null', 'trait'
    ],
    operators: [
        '=', '>', '<', '!', '~', '?', ':',
        '==', '<=', '>=', '!=', '&&', '||', '++', '--',
        '+', '-', '*', '/', '&', '|', '^', '%', '<<',
        '>>', '>>>', '+=', '-=', '*=', '/=', '&=', '|=',
        '^=', '%=', '<<=', '>>=', '>>>='
    ],
    // we include these common regular expressions
    symbols: /[=><!~?:&|+\-*\/\^%]+/,
    escapes: /\\(?:[abfnrtv\\"']|x[0-9A-Fa-f]{1,4}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})/,
    digits: /\d+(_+\d+)*/,
    octaldigits: /[0-7]+(_+[0-7]+)*/,
    binarydigits: /[0-1]+(_+[0-1]+)*/,
    hexdigits: /[[0-9a-fA-F]+(_+[0-9a-fA-F]+)*/,
    // The main tokenizer for our languages
    tokenizer: {
        root: [
            // identifiers and keywords
            [/[a-zA-Z_$][\w$]*/, {
                cases: {
                    '@keywords': { token: 'keyword.$0' },
                    '@default': 'identifier'
                }
            }],
            // whitespace
            { include: '@whitespace' },
            // delimiters and operators
            [/[{}()\[\]]/, '@brackets'],
            [/[<>](?!@symbols)/, '@brackets'],
            [/@symbols/, {
                cases: {
                    '@operators': 'delimiter',
                    '@default': ''
                }
            }],
            // @ annotations.
            [/@\s*[a-zA-Z_\$][\w\$]*/, 'annotation'],
            // numbers
            [/(@digits)[eE]([\-+]?(@digits))?[fFdD]?/, 'number.float'],
            [/(@digits)\.(@digits)([eE][\-+]?(@digits))?[fFdD]?/, 'number.float'],
            [/0[xX](@hexdigits)[Ll]?/, 'number.hex'],
            [/0(@octaldigits)[Ll]?/, 'number.octal'],
            [/0[bB](@binarydigits)[Ll]?/, 'number.binary'],
            [/(@digits)[fFdD]/, 'number.float'],
            [/(@digits)[lL]?/, 'number'],
            // delimiter: after number because of .\d floats
            [/[;,.]/, 'delimiter'],
            // strings
            [/"([^"\\]|\\.)*$/, 'string.invalid'],
            [/"/, 'string', '@string'],
            // characters
            [/'[^\\']'/, 'string'],
            [/(')(@escapes)(')/, ['string', 'string.escape', 'string']],
            [/'/, 'string.invalid']
        ],
        whitespace: [
            [/[ \t\r\n]+/, ''],
            [/\/\*\*(?!\/)/, 'comment.doc', '@javadoc'],
            [/\/\*/, 'comment', '@comment'],
            [/\/\/.*$/, 'comment'],
        ],
        comment: [
            [/[^\/*]+/, 'comment'],
            // [/\/\*/, 'comment', '@push' ],    // nested comment not allowed :-(
            // [/\/\*/,    'comment.invalid' ],    // this breaks block comments in the shape of /* //*/
            [/\*\//, 'comment', '@pop'],
            [/[\/*]/, 'comment']
        ],
        //Identical copy of comment above, except for the addition of .doc
        javadoc: [
            [/[^\/*]+/, 'comment.doc'],
            // [/\/\*/, 'comment.doc', '@push' ],    // nested comment not allowed :-(
            [/\/\*/, 'comment.doc.invalid'],
            [/\*\//, 'comment.doc', '@pop'],
            [/[\/*]/, 'comment.doc']
        ],
        string: [
            [/[^\\"]+/, 'string'],
            [/@escapes/, 'string.escape'],
            [/\\./, 'string.escape.invalid'],
            [/"/, 'string', '@pop']
        ],
    },
};

export { languageConfiguration, tokensProviderConfig };