/*
 *  Copyright 1999-2019 Seata.io Group.
 *
 *  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 io.seata.sqlparser.druid;

import com.alibaba.druid.sql.SQLUtils;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.ast.statement.SQLDeleteStatement;
import com.alibaba.druid.sql.dialect.mysql.ast.expr.MySqlOrderingExpr;
import io.seata.sqlparser.ParametersHolder;
import io.seata.sqlparser.SQLType;
import io.seata.sqlparser.druid.mysql.MySQLDeleteRecognizer;
import io.seata.sqlparser.util.JdbcConstants;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

/**
 * The type My sql delete recognizer test.
 *
 * @author hanwen created at 2019-01-25
 */
public class MySQLDeleteRecognizerTest extends AbstractRecognizerTest {

    @Test
    public void testVMarker() {
        Assertions.assertEquals("?", new BaseRecognizer.VMarker().toString());
    }

    /**
     * Delete recognizer test 0.
     */
    @Test
    public void deleteRecognizerTest_0() {
        ParametersHolder parametersHolder = new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                return Collections.EMPTY_MAP;
            }
        };

        String sql = "DELETE FROM t1 WHERE id = 'id1' order by id asc,name desc limit 1,2";

        SQLStatement statement = getSQLStatement(sql);
        ArrayList<List<Object>> paramAppenderList = new ArrayList<>();

        MySQLDeleteRecognizer mySQLDeleteRecognizer = new MySQLDeleteRecognizer(sql, statement);
        String orderBy = mySQLDeleteRecognizer.getOrderBy();
        Assertions.assertTrue(orderBy.equalsIgnoreCase(" ORDER BY id asc,name desc"));
        Assertions.assertEquals(sql, mySQLDeleteRecognizer.getOriginalSQL());
        Assertions.assertEquals("t1", mySQLDeleteRecognizer.getTableName());
        Assertions.assertEquals("id = 'id1'", mySQLDeleteRecognizer.getWhereCondition());
        String limit = mySQLDeleteRecognizer.getLimit(parametersHolder, paramAppenderList);
        Assertions.assertEquals(" LIMIT 1,2", limit);
        sql = "DELETE FROM t1 WHERE id > 1 order by id ,name desc limit 1";
        statement = getSQLStatement(sql);
        mySQLDeleteRecognizer = new MySQLDeleteRecognizer(sql, statement);
        orderBy = mySQLDeleteRecognizer.getOrderBy();
        Assertions.assertTrue(orderBy.equalsIgnoreCase(" order by id,name desc"));
        Assertions.assertEquals(" LIMIT 1", mySQLDeleteRecognizer.getLimit(parametersHolder, paramAppenderList));
        sql = "DELETE FROM t1 WHERE id > 1";
        statement = getSQLStatement(sql);
        mySQLDeleteRecognizer = new MySQLDeleteRecognizer(sql, statement);
        Assertions.assertEquals(null, mySQLDeleteRecognizer.getLimit(parametersHolder, paramAppenderList));
        orderBy = mySQLDeleteRecognizer.getOrderBy();
        Assertions.assertEquals(null, mySQLDeleteRecognizer.getOrderBy());

    }

    /**
     * Delete recognizer test 1.
     */
    @Test
    public void deleteRecognizerTest_1() {

        String sql = "DELETE FROM t1 WHERE id = ?";

        SQLStatement statement = getSQLStatement(sql);

        MySQLDeleteRecognizer mySQLDeleteRecognizer = new MySQLDeleteRecognizer(sql, statement);

        Assertions.assertEquals(sql, mySQLDeleteRecognizer.getOriginalSQL());
        Assertions.assertEquals("t1", mySQLDeleteRecognizer.getTableName());

        // test overflow parameters
        ArrayList<List<Object>> paramAppenderList = new ArrayList<>();
        String whereCondition = mySQLDeleteRecognizer.getWhereCondition(new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                ArrayList<Object> idParam = new ArrayList<>();
                idParam.add("id1");
                Map result = new HashMap<>();
                result.put(1,idParam);
                return result;
            }
        }, paramAppenderList);

        Assertions.assertEquals(Collections.singletonList(Collections.singletonList("id1")), paramAppenderList);
        Assertions.assertEquals("id = ?", whereCondition);
    }

    /**
     * Delete recognizer test 2.
     */
    @Test
    public void deleteRecognizerTest_2() {

        String sql = "DELETE FROM t1 WHERE id IN (?, ?)";

        SQLStatement statement = getSQLStatement(sql);

        MySQLDeleteRecognizer mySQLDeleteRecognizer = new MySQLDeleteRecognizer(sql, statement);

        Assertions.assertEquals(sql, mySQLDeleteRecognizer.getOriginalSQL());
        Assertions.assertEquals("t1", mySQLDeleteRecognizer.getTableName());

        // test overflow parameters
        ArrayList<List<Object>> paramAppenderList = new ArrayList<>();
        String whereCondition = mySQLDeleteRecognizer.getWhereCondition(new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                ArrayList<Object> idParam = new ArrayList<>();
                idParam.add("id1");
                ArrayList<Object> id2Param = new ArrayList<>();
                id2Param.add("id2");
                Map result = new HashMap();
                result.put(1, idParam);
                result.put(2, id2Param);
                return result;
            }
        }, paramAppenderList);

        Assertions.assertEquals(Arrays.asList(Arrays.asList("id1", "id2")), paramAppenderList);
        Assertions.assertEquals("id IN (?, ?)", whereCondition);
    }

    /**
     * Delete recognizer test 3.
     */
    @Test
    public void deleteRecognizerTest_3() {

        String sql = "DELETE FROM t1 WHERE id between ? AND ?";

        SQLStatement statement = getSQLStatement(sql);

        MySQLDeleteRecognizer mySQLDeleteRecognizer = new MySQLDeleteRecognizer(sql, statement);

        Assertions.assertEquals(sql, mySQLDeleteRecognizer.getOriginalSQL());
        Assertions.assertEquals("t1", mySQLDeleteRecognizer.getTableName());

        // test overflow parameters
        ArrayList<List<Object>> paramAppenderList = new ArrayList<>();
        String whereCondition = mySQLDeleteRecognizer.getWhereCondition(new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                ArrayList<Object> idParam = new ArrayList<>();
                idParam.add("id1");
                ArrayList<Object> id2Param = new ArrayList<>();
                id2Param.add("id2");
                Map result = new HashMap();
                result.put(1, idParam);
                result.put(2, id2Param);
                return result;
            }
        }, paramAppenderList);

        Assertions.assertEquals(Collections.singletonList(Arrays.asList("id1", "id2")), paramAppenderList);
        Assertions.assertEquals("id BETWEEN ? AND ?", whereCondition);
    }

    @Test
    public void testGetSqlType() {
        String sql = "delete from t where id = ?";
        List<SQLStatement> asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);

        MySQLDeleteRecognizer recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        Assertions.assertEquals(recognizer.getSQLType(), SQLType.DELETE);
    }

    @Test
    public void testGetTableAlias() {
        String sql = "delete from t where id = ?";
        List<SQLStatement> asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);

        MySQLDeleteRecognizer recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        Assertions.assertNull(recognizer.getTableAlias());
    }

    @Test
    public void testGetWhereCondition_0() {
        String sql = "delete from t";
        List<SQLStatement> asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);

        MySQLDeleteRecognizer recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        String whereCondition = recognizer.getWhereCondition(new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                return null;
            }
        }, new ArrayList<>());

        //test for no condition
        Assertions.assertEquals("", whereCondition);

        sql = "delete from t where id = ?";
        asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);

        recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        whereCondition = recognizer.getWhereCondition(new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                ArrayList<Object> idParam = new ArrayList<>();
                idParam.add(1);
                Map result = new HashMap();
                result.put(1, idParam);
                return result;
            }
        }, new ArrayList<>());

        //test for normal sql
        Assertions.assertEquals("id = ?", whereCondition);

        sql = "delete from t where id in (?)";
        asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
        recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        whereCondition = recognizer.getWhereCondition(new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                ArrayList<Object> idParam = new ArrayList<>();
                idParam.add(1);
                Map result = new HashMap();
                result.put(1, idParam);
                return result;
            }
        }, new ArrayList<>());

        //test for sql with in
        Assertions.assertEquals("id IN (?)", whereCondition);

        sql = "delete from t where id between ? and ?";
        asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
        recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        whereCondition = recognizer.getWhereCondition(new ParametersHolder() {
            @Override
            public Map<Integer,ArrayList<Object>> getParameters() {
                ArrayList<Object> idParam = new ArrayList<>();
                idParam.add(1);
                ArrayList<Object> idParam2 = new ArrayList<>();
                idParam.add(2);
                Map result = new HashMap();
                result.put(1, idParam);
                result.put(2, idParam2);
                return result;
            }
        }, new ArrayList<>());
        //test for sql with in
        Assertions.assertEquals("id BETWEEN ? AND ?", whereCondition);

        //test for exception
        Assertions.assertThrows(IllegalArgumentException.class, () -> {
            String s = "delete from t where id in (?)";
            List<SQLStatement> sqlStatements = SQLUtils.parseStatements(s, JdbcConstants.MYSQL);
            SQLDeleteStatement deleteAst = (SQLDeleteStatement) sqlStatements.get(0);
            deleteAst.setWhere(new MySqlOrderingExpr());
            new MySQLDeleteRecognizer(s, deleteAst).getWhereCondition(new ParametersHolder() {
                @Override
                public Map<Integer,ArrayList<Object>> getParameters() {
                    return new HashMap();
                }
            }, new ArrayList<>());
        });
    }

    @Test
    public void testGetWhereCondition_1() {

        String sql = "delete from t";
        List<SQLStatement> asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);

        MySQLDeleteRecognizer recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        String whereCondition = recognizer.getWhereCondition();

        //test for no condition
        Assertions.assertEquals("", whereCondition);

        sql = "delete from t where id = 1";
        asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);

        recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        whereCondition = recognizer.getWhereCondition();

        //test for normal sql
        Assertions.assertEquals("id = 1", whereCondition);

        sql = "delete from t where id in (1)";
        asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
        recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        whereCondition = recognizer.getWhereCondition();

        //test for sql with in
        Assertions.assertEquals("id IN (1)", whereCondition);

        sql = "delete from t where id between 1 and 2";
        asts = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
        recognizer = new MySQLDeleteRecognizer(sql, asts.get(0));
        whereCondition = recognizer.getWhereCondition();
        //test for sql with in
        Assertions.assertEquals("id BETWEEN 1 AND 2", whereCondition);

        //test for exception
        Assertions.assertThrows(IllegalArgumentException.class, () -> {
            String s = "delete from t where id in (1)";
            List<SQLStatement> sqlStatements = SQLUtils.parseStatements(s, JdbcConstants.MYSQL);
            SQLDeleteStatement deleteAst = (SQLDeleteStatement) sqlStatements.get(0);
            deleteAst.setWhere(new MySqlOrderingExpr());
            new MySQLDeleteRecognizer(s, deleteAst).getWhereCondition();
        });
    }

    @Override
    public String getDbType() {
        return JdbcConstants.MYSQL;
    }
}
