// Copyright (c) 2017, Compiler Explorer Authors
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
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//     * Redistributions in binary form must reproduce the above copyright
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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import $ from 'jquery';

import * as monaco from 'monaco-editor';
import * as cpp from 'monaco-editor/esm/vs/basic-languages/cpp/cpp';

// We need to create a new definition for cpp so we can remove invalid keywords

function definition(): monaco.languages.IMonarchLanguage {
    const cppp = $.extend(true, {}, cpp.language); // deep copy

    function removeKeyword(keyword) {
        const index = cppp.keywords.indexOf(keyword);
        if (index > -1) {
            cppp.keywords.splice(index, 1);
        }
    }

    function removeKeywords(keywords) {
        for (let i = 0; i < keywords.length; ++i) {
            removeKeyword(keywords[i]);
        }
    }

    function addKeywords(keywords) {
        // (Ruben) Done one by one as if you just push them all, Monaco complains that they're not strings, but as
        // far as I can tell, they indeed are all strings. This somehow fixes it. If you know how to fix it, plz go
        for (let i = 0; i < keywords.length; ++i) {
            cppp.keywords.push(keywords[i]);
        }
    }

    // We remove everything that's not an identifier, underscore reserved name and not an official C++ keyword...
    // Regarding #617, final is a identifier with special meaning, not a fully qualified keyword
    removeKeywords([
        'abstract',
        'amp',
        'array',
        'cpu',
        'delegate',
        'each',
        'event',
        'finally',
        'gcnew',
        'generic',
        'in',
        'initonly',
        'interface',
        'interior_ptr',
        'internal',
        'literal',
        'partial',
        'pascal',
        'pin_ptr',
        'property',
        'ref',
        'restrict',
        'safe_cast',
        'sealed',
        'title_static',
        'where',
    ]);

    addKeywords([
        'alignas',
        'alignof',
        'and',
        'and_eq',
        'asm',
        'bitand',
        'bitor',
        'char8_t',
        'char16_t',
        'char32_t',
        'compl',
        'concept',
        'consteval',
        'constinit',
        'co_await',
        'co_return',
        'co_yield',
        'export',
        'import',
        'module',
        'not',
        'not_eq',
        'or',
        'or_eq',
        'requires',
        'xor',
        'xor_eq',
    ]);

    return cppp;
}

const def = definition();

monaco.languages.register({id: 'cppp'});
monaco.languages.setLanguageConfiguration('cppp', cpp.conf);
monaco.languages.setMonarchTokensProvider('cppp', def);

export = def;