/*
Language: Java
Author: Vsevolod Solovyov <vsevolod.solovyov@gmail.com>
Category: common, enterprise
Website: https://www.java.com/
*/

export default function (hljs) {
    var JAVA_IDENT_RE = '[\xC0-\u02B8a-zA-Z_$][\xC0-\u02B8a-zA-Z_$0-9]*';
    var GENERIC_IDENT_RE = JAVA_IDENT_RE + '(<' + JAVA_IDENT_RE + '(\\s*,\\s*' + JAVA_IDENT_RE + ')*>)?';
    var KEYWORDS =
        'false synchronized int abstract float private char boolean var static null if const for true while long strictfp finally protected import native final void enum else break transient catch instanceof byte super volatile case assert short ' +
        'package default double public try this switch continue throws protected public private ' +
        'module requires exports do';
    var ANNOTATION = {
        className: 'meta',
        begin: '@' + JAVA_IDENT_RE,
        contains: [
            {
                begin: /\(/,
                end: /\)/,
                contains: ['self'] // allow nested () inside our annotation
            }
        ]
    };
    // https://docs.oracle.com/javase/7/docs/technotes/guides/language/underscores-literals.html
    var JAVA_NUMBER_RE =
        '\\b(0[bB]([01]+[01_]+[01]+|[01]+)' +
        // 0b...
        '|' +
        '0[xX]([a-fA-F0-9]+[a-fA-F0-9_]+[a-fA-F0-9]+|[a-fA-F0-9]+)' +
        // 0x...
        '|' +
        '(' +
        '([\\d]+[\\d_]+[\\d]+|[\\d]+)(\\.([\\d]+[\\d_]+[\\d]+|[\\d]+))?' +
        '|' +
        '\\.([\\d]+[\\d_]+[\\d]+|[\\d]+)' +
        ')' +
        '([eE][-+]?\\d+)?' +
        // octal, decimal, float
        ')' +
        '[lLfF]?';
    var JAVA_NUMBER_MODE = {
        className: 'number',
        begin: JAVA_NUMBER_RE,
        relevance: 0
    };
    return {
        name: 'Java',
        aliases: ['jsp'],
        keywords: KEYWORDS,
        illegal: /<\/|#/,
        contains: [
            hljs.COMMENT('/\\*\\*', '\\*/', {
                relevance: 0,
                contains: [
                    {
                        // eat up @'s in emails to prevent them to be recognized as doctags
                        begin: /\w+@/,
                        relevance: 0
                    },
                    {
                        className: 'doctag',
                        begin: '@[A-Za-z]+'
                    }
                ]
            }),
            hljs.C_LINE_COMMENT_MODE,
            hljs.C_BLOCK_COMMENT_MODE,
            hljs.APOS_STRING_MODE,
            hljs.QUOTE_STRING_MODE,
            {
                className: 'class',
                beginKeywords: 'class interface',
                end: /[{;=]/,
                excludeEnd: true,
                keywords: 'class interface',
                illegal: /[:"\[\]]/,
                contains: [
                    {
                        beginKeywords: 'extends implements'
                    },
                    hljs.UNDERSCORE_TITLE_MODE
                ]
            },
            {
                // Expression keywords prevent 'keyword Name(...)' from being
                // recognized as a function definition
                beginKeywords: 'new throw return else',
                relevance: 0
            },
            {
                className: 'function',
                begin: '(' + GENERIC_IDENT_RE + '\\s+)+' + hljs.UNDERSCORE_IDENT_RE + '\\s*\\(',
                returnBegin: true,
                end: /[{;=]/,
                excludeEnd: true,
                keywords: KEYWORDS,
                contains: [
                    {
                        begin: hljs.UNDERSCORE_IDENT_RE + '\\s*\\(',
                        returnBegin: true,
                        relevance: 0,
                        contains: [hljs.UNDERSCORE_TITLE_MODE]
                    },
                    {
                        className: 'params',
                        begin: /\(/,
                        end: /\)/,
                        keywords: KEYWORDS,
                        relevance: 0,
                        contains: [ANNOTATION, hljs.APOS_STRING_MODE, hljs.QUOTE_STRING_MODE, hljs.C_NUMBER_MODE, hljs.C_BLOCK_COMMENT_MODE]
                    },
                    hljs.C_LINE_COMMENT_MODE,
                    hljs.C_BLOCK_COMMENT_MODE
                ]
            },
            JAVA_NUMBER_MODE,
            ANNOTATION
        ]
    };
}