// Copyright (C) 2008 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package prettify.lang;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Pattern;
import prettify.parser.Prettify;

/**
 * This is similar to the lang-sql.js in JavaScript Prettify.
 * 
 * All comments are adapted from the JavaScript Prettify.
 * 
 * <p>
 * Registers a language handler for SQL.
 *
 *
 * To use, include prettify.js and this file in your HTML page.
 * Then put your code in an HTML tag like
 *      <pre class="prettyprint lang-sql">(my SQL code)</pre>
 *
 *
 * http://savage.net.au/SQL/sql-99.bnf.html is the basis for the grammar, and
 * http://msdn.microsoft.com/en-us/library/aa238507(SQL.80).aspx and
 * http://meta.stackoverflow.com/q/92352/137403 as the bases for the keyword
 * list.
 *
 * @author mikesamuel@gmail.com
 */
public class LangSql extends Lang {

  public LangSql() {
    List<List<Object>> _shortcutStylePatterns = new ArrayList<List<Object>>();
    List<List<Object>> _fallthroughStylePatterns = new ArrayList<List<Object>>();

    // Whitespace
    _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^[\\t\\n\\r \\xA0]+"), null, "\t\n\r " + Character.toString((char) 0xA0)}));
    // A double or single quoted, possibly multi-line, string.
    _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^(?:\"(?:[^\\\"\\\\]|\\\\.)*\"|'(?:[^\\'\\\\]|\\\\.)*')"), null, "\"'"}));
    // A comment is either a line comment that starts with two dashes, or
    // two dashes preceding a long bracketed block.
    _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_COMMENT, Pattern.compile("^(?:--[^\\r\\n]*|\\/\\*[\\s\\S]*?(?:\\*\\/|$))")}));
    _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^(?:ADD|ALL|ALTER|AND|ANY|APPLY|AS|ASC|AUTHORIZATION|BACKUP|BEGIN|BETWEEN|BREAK|BROWSE|BULK|BY|CASCADE|CASE|CHECK|CHECKPOINT|CLOSE|CLUSTERED|COALESCE|COLLATE|COLUMN|COMMIT|COMPUTE|CONNECT|CONSTRAINT|CONTAINS|CONTAINSTABLE|CONTINUE|CONVERT|CREATE|CROSS|CURRENT|CURRENT_DATE|CURRENT_TIME|CURRENT_TIMESTAMP|CURRENT_USER|CURSOR|DATABASE|DBCC|DEALLOCATE|DECLARE|DEFAULT|DELETE|DENY|DESC|DISK|DISTINCT|DISTRIBUTED|DOUBLE|DROP|DUMMY|DUMP|ELSE|END|ERRLVL|ESCAPE|EXCEPT|EXEC|EXECUTE|EXISTS|EXIT|FETCH|FILE|FILLFACTOR|FOLLOWING|FOR|FOREIGN|FREETEXT|FREETEXTTABLE|FROM|FULL|FUNCTION|GOTO|GRANT|GROUP|HAVING|HOLDLOCK|IDENTITY|IDENTITYCOL|IDENTITY_INSERT|IF|IN|INDEX|INNER|INSERT|INTERSECT|INTO|IS|JOIN|KEY|KILL|LEFT|LIKE|LINENO|LOAD|MATCH|MERGE|NATIONAL|NOCHECK|NONCLUSTERED|NOT|NULL|NULLIF|OF|OFF|OFFSETS|ON|OPEN|OPENDATASOURCE|OPENQUERY|OPENROWSET|OPENXML|OPTION|OR|ORDER|OUTER|OVER|PERCENT|PLAN|PRECEDING|PRECISION|PRIMARY|PRINT|PROC|PROCEDURE|PUBLIC|RAISERROR|READ|READTEXT|RECONFIGURE|REFERENCES|REPLICATION|RESTORE|RESTRICT|RETURN|REVOKE|RIGHT|ROLLBACK|ROWCOUNT|ROWGUIDCOL|ROWS?|RULE|SAVE|SCHEMA|SELECT|SESSION_USER|SET|SETUSER|SHUTDOWN|SOME|STATISTICS|SYSTEM_USER|TABLE|TEXTSIZE|THEN|TO|TOP|TRAN|TRANSACTION|TRIGGER|TRUNCATE|TSEQUAL|UNBOUNDED|UNION|UNIQUE|UPDATE|UPDATETEXT|USE|USER|USING|VALUES|VARYING|VIEW|WAITFOR|WHEN|WHERE|WHILE|WITH|WRITETEXT)(?=[^\\w-]|$)", Pattern.CASE_INSENSITIVE), null}));
    // A number is a hex integer literal, a decimal real literal, or in
    // scientific notation.
    _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^[+-]?(?:0x[\\da-f]+|(?:(?:\\.\\d+|\\d+(?:\\.\\d*)?)(?:e[+\\-]?\\d+)?))", Pattern.CASE_INSENSITIVE)}));
    // An identifier
    _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^[a-z_][\\w-]*", Pattern.CASE_INSENSITIVE)}));
    // A run of punctuation
    _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PUNCTUATION, Pattern.compile("^[^\\w\\t\\n\\r \\xA0\\\"\\'][^\\w\\t\\n\\r \\xA0+\\-\\\"\\']*")}));

    setShortcutStylePatterns(_shortcutStylePatterns);
    setFallthroughStylePatterns(_fallthroughStylePatterns);
  }

  public static List<String> getFileExtensions() {
    return Arrays.asList(new String[]{"sql"});
  }
}