// Copyright (c) 2022, Compiler Explorer Authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

import * as monaco from 'monaco-editor';

function definition(): monaco.languages.IMonarchLanguage {
    return {
        defaultToken: 'invalid',

        keywords: [
            'as',
            'break',
            'continue',
            'del',
            'do',
            'else',
            'false',
            'fn',
            'for',
            'foreach',
            'from',
            'if',
            'if!',
            'import',
            'in',
            'let',
            'loop',
            'match',
            'nil',
            'return',
            'struct',
            'true',
            'var',
            'while',
            'while!',
        ],
        typeKeywords: [],
        operators: [
            '..',
            '.',
            '|=',
            '||',
            '|',
            '^=',
            '^',
            '&=',
            '&&',
            '&',
            '=>',
            '==',
            '=',
            '!=',
            '!',
            '>=',
            '>>=',
            '>>',
            '>',
            '<=',
            '<<=',
            '<<',
            '<',
            '+=',
            '++',
            '+',
            '-=',
            '--',
            '-',
            '*=',
            '*',
            '/=',
            '/',
            '~/=',
            '~/',
            '~',
            '%=',
            '%',
        ],

        symbols: /[=><!~?:&|+\-*/^%]+/,

        escapes: /\\(?:[abfnrtv\\"']|x[0-9A-Fa-f]{1,4}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})/,

        tokenizer: {
            root: [
                // identifiers and keywords
                [
                    /[a-z_$][\w$]*/,
                    {
                        cases: {
                            '@typeKeywords': 'keyword',
                            '@keywords': 'keyword',
                            '@default': 'identifier',
                        },
                    },
                ],

                [/[A-Z][\w$]*/, 'type.identifier'], // to show class names nicely

                // whitespace
                {include: '@whitespace'},

                // delimiters and operators
                [/[{}()[\]]/, '@brackets'],
                [/[<>](?!@symbols)/, '@brackets'],
                [
                    /@symbols/,
                    {
                        cases: {
                            '@operators': 'operator',
                            '@default': '',
                        },
                    },
                ],

                // numbers
                [/\d*\.\d+([eE][-+]?\d+)?[fFdD]?/, 'number.float'],
                [/0[xX][0-9a-fA-F_]*[0-9a-fA-F][Ll]?/, 'number.hex'],
                [/0o[0-7_]*[0-7][Ll]?/, 'number.octal'],
                [/0[bB][0-1_]*[0-1][Ll]?/, 'number.binary'],
                [/\d+/, 'number'],

                // delimiter: after number because of .\d floats
                [/[;,.]/, 'delimiter'],

                // strings
                [/"([^"\\]|\\.)*$/, 'string.invalid'], // non-teminated string
                [/c?\\\\.*$/, 'string'],
                [/c?"/, 'string', '@string'],

                // characters
                [/'[^\\']'/, 'string'],
                [/(')(@escapes)(')/, ['string', 'string.escape', 'string']],
                [/'/, 'string.invalid'],
            ],

            whitespace: [
                [/[ \r\n]+/, 'white'],
                [/\/\*/, 'comment', '@comment'],
                [/\/\+/, 'comment', '@comment'],
                [/\/\/.*$/, 'comment'],
                [/\t/, 'comment.invalid'],
            ],

            comment: [
                [/[^/*]+/, 'comment'],
                [/\/\*/, 'comment.invalid'],
                [/[/*]/, 'comment'],
            ],

            string: [
                [/[^\\"]+/, 'string'],
                [/@escapes/, 'string.escape'],
                [/\\./, 'string.escape.invalid'],
                [/"/, 'string', '@pop'],
            ],
        },
    };
}

monaco.languages.register({id: 'hook'});
monaco.languages.setMonarchTokensProvider('hook', definition());

export {};