/*
 * Copyright 2014 Eediom 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 org.araqne.logdb.query.parser;

import java.util.HashMap;
import java.util.Map;

import org.araqne.confdb.ConfigService;
import org.araqne.logdb.AbstractQueryCommandParser;
import org.araqne.logdb.QueryCommand;
import org.araqne.logdb.QueryContext;
import org.araqne.logdb.QueryErrorMessage;
import org.araqne.logdb.QueryParseException;
import org.araqne.logdb.query.command.Confdb;
import org.araqne.logdb.query.command.Confdb.ConfdbOptions;
import org.araqne.logdb.query.command.Confdb.Op;

/**
 * @since 2.1.2
 * @author xeraph
 * 
 */
public class ConfdbParser extends AbstractQueryCommandParser {

	private ConfigService conf;

	public ConfdbParser(ConfigService conf) {
		this.conf = conf;
		setDescriptions("Query config database. This command requires administrator privilege.",
				"설정DB를 쿼리합니다. 이 명령어는 관리자 권한이 필요합니다.");
	}

	@Override
	public String getCommandName() {
		return "confdb";
	}

	@Override
	public Map<String, QueryErrorMessage> getErrorMessages() {
		Map<String, QueryErrorMessage> m = new HashMap<String, QueryErrorMessage>();
		m.put("10000", new QueryErrorMessage("no-read-permission", "권한이 없습니다. 관리자 권한이 필요합니다."));
		m.put("10001", new QueryErrorMessage("missing-confdb-op", "입력된 옵션 값이 없습니다."));
		m.put("10002", new QueryErrorMessage("missing-confdb-dbname", "검색 할 컬렉션의 데이타베이스 이름을 입력하십시오."));
		m.put("10003", new QueryErrorMessage("missing-confdb-colname", "검색 할 설정 문서의 데이타베이스 이름을 입력하십시오."));
		m.put("10004", new QueryErrorMessage("invalid-confdb-op", "[op]는 지원하지 않는 옵션 입니다."));
		return m;
	}

	@Override
	public QueryCommand parse(QueryContext context, String commandString) {
		boolean allowed = context != null && context.getSession() != null && context.getSession().isAdmin();
		if (!allowed)
			// throw new QueryParseException("no-read-permission", -1,
			// "admin only");
			throw new QueryParseException("10000", -1, -1, null);

		String s = commandString.substring(getCommandName().length());
		QueryTokens tokens = QueryTokenizer.tokenize(s);

		if (tokens.size() < 1)
			// throw new QueryParseException("missing-confdb-op", -1);
			throw new QueryParseException("10001", getCommandName().length() + 1, commandString.length() - 1, null);

		Confdb.Op op = null;
		try {
			op = Confdb.Op.parse(tokens.string(0));
			;
		} catch (QueryParseException t) {
			if (t.getType().equals("10004")) {
				String ops = t.getParams().get("op");
				int offset = QueryTokenizer.findKeyword(commandString, ops, getCommandName().length());
				throw new QueryParseException(t.getType(), offset, offset + ops.length() - 1, t.getParams());
			} else {
				throw t;
			}
		}

		ConfdbOptions options = new ConfdbOptions();
		options.setOp(op);

		if (op == Op.COLS) {
			if (tokens.size() < 2)
				// throw new QueryParseException("missing-confdb-dbname", -1);
				throw new QueryParseException("10002", commandString.length() - 1, commandString.length() - 1, null);
			options.setDbName(tokens.string(1));
		} else if (op == Op.DOCS) {
			if (tokens.size() < 3)
				// throw new QueryParseException("missing-confdb-colname", -1);
				throw new QueryParseException("10003", commandString.length() - 1, commandString.length() - 1, null);
			options.setDbName(tokens.string(1));
			options.setColName(tokens.string(2));
		}

		return new Confdb(conf, options);
	}

}