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/**
 * Copyright (C) 2016 - 2030 youtongluan.
 *
 * 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.yx.db.mapper;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.yx.db.sql.InsertResult;
import org.yx.db.sql.MapedSql;
import org.yx.db.sql.SqlBuilder;
import org.yx.db.visit.Visitors;
import org.yx.exception.SumkException;

/**
 * 这里的sql，占位符不是?，而是#{**}，里面的name，与map的key要一一对应，忽略大小写

 * 大小写敏感
 * 
 * @author 游夏
 *
 */
public final class NamedExecutor {

	private static class InnerSqlBuilder implements SqlBuilder {

		private final Map map;
		private final SqlParser sqlParser;

		InnerSqlBuilder(SqlParser sql, Map map) {
			this.sqlParser = sql;
			this.map = map == null ? Collections.emptyMap() : new HashMap<>(map);
		}

		@Override
		public MapedSql toMapedSql() throws Exception {
			return sqlParser.toMapedSql(map);
		}

	}

	private static InnerSqlBuilder createSqlBuilder(SqlParser sql, Map map) {
		return new InnerSqlBuilder(sql, map);
	}

	public static int execute(SqlParser sql, Map map) {
		try {
			return Visitors.modifyVisitor.visit(createSqlBuilder(sql, map));
		} catch (Exception e) {
			throw SumkException.wrap(e);
		}
	}

	public static InsertResult insertWithAutoGeneratedKeys(SqlParser sql, Map map) {
		try {
			return Visitors.insertWithAutoGeneratedKeysVisitor.visit(createSqlBuilder(sql, map));
		} catch (Exception e) {
			throw SumkException.wrap(e);
		}
	}

	public static List> list(SqlParser sql, Map map) {
		try {
			return Visitors.queryVisitor.visit(createSqlBuilder(sql, map));
		} catch (Exception e) {
			throw SumkException.wrap(e);
		}
	}

	public static List listInArray(SqlParser sql, Map map) {
		try {
			return Visitors.arrayListQueryVisitor.visit(createSqlBuilder(sql, map));
		} catch (Exception e) {
			throw SumkException.wrap(e);
		}
	}

	public static List singleColumnList(SqlParser sql, Map map) {
		try {
			return Visitors.singleListQueryVisitor.visit(createSqlBuilder(sql, map));
		} catch (Exception e) {
			throw SumkException.wrap(e);
		}
	}

	public static long count(SqlParser sql, Map map) {
		try {
			List list = Visitors.singleListQueryVisitor.visit(createSqlBuilder(sql, map));
			Number n = (Number) list.get(0);
			return n.longValue();
		} catch (Exception e) {
			throw SumkException.wrap(e);
		}
	}

}