/**
 * Copyright 2020 Pivotal Software, Inc.
 * <p>
 * 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
 * <p>
 * https://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.micrometer.core.instrument.binder.db;

import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Tags;
import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
import org.jetbrains.annotations.NotNull;
import org.jooq.*;
import org.jooq.exception.DataAccessException;
import org.jooq.impl.DSL;
import org.jooq.impl.DefaultConfiguration;
import org.junit.jupiter.api.Test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import static io.micrometer.core.instrument.binder.db.MetricsDSLContext.withMetrics;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.failBecauseExceptionWasNotThrown;
import static org.jooq.impl.DSL.*;

class MetricsDSLContextTest {
    private MeterRegistry meterRegistry = new SimpleMeterRegistry();

    @Test
    void timeFluentSelectStatement() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:fluentSelect")) {
            MetricsDSLContext jooq = createDatabase(conn);

            Result<Record> result = jooq.tag("name", "selectAllAuthors").select(asterisk()).from("author").fetch();
            assertThat(result.size()).isEqualTo(1);

            // intentionally don't time this operation to demonstrate that the configuration hasn't been globally mutated
            jooq.select(asterisk()).from("author").fetch();

            assertThat(meterRegistry.get("jooq.query")
                    .tag("name", "selectAllAuthors")
                    .tag("type", "read")
                    .timer().count())
                    .isEqualTo(1);
        }
    }

    @Test
    void timeParsedSelectStatement() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:parsedSelect")) {
            MetricsDSLContext jooq = createDatabase(conn);
            jooq.tag("name", "selectAllAuthors").fetch("SELECT * FROM author");

            // intentionally don't time this operation to demonstrate that the configuration hasn't been globally mutated
            jooq.fetch("SELECT * FROM author");

            assertThat(meterRegistry.get("jooq.query")
                    .tag("name", "selectAllAuthors")
                    .tag("type", "read")
                    .timer().count())
                    .isEqualTo(1);
        }
    }

    @Test
    void timeFaultySelectStatement() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:faultySelect")) {
            MetricsDSLContext jooq = createDatabase(conn);
            jooq.tag("name", "selectAllAuthors").fetch("SELECT non_existent_field FROM author");

            failBecauseExceptionWasNotThrown(DataAccessException.class);
        } catch (DataAccessException ignored) {
        }

        assertThat(meterRegistry.get("jooq.query")
                .tag("name", "selectAllAuthors")
                .tag("type", "read")
                .tag("exception", "c42 syntax error or access rule violation")
                .tag("exception.subclass", "none")
                .timer().count())
                .isEqualTo(1);
    }

    @Test
    void timeExecute() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:fluentSelect")) {
            MetricsDSLContext jooq = createDatabase(conn);

            jooq.tag("name", "selectAllAuthors").execute("SELECT * FROM author");

            assertThat(meterRegistry.get("jooq.query")
                    .tag("name", "selectAllAuthors")
                    .timer().count())
                    .isEqualTo(1);
        }
    }

    @Test
    void timeInsert() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:fluentSelect")) {
            MetricsDSLContext jooq = createDatabase(conn);

            jooq.tag("name", "insertAuthor").insertInto(table("author")).values("2", "jon", "schneider")
                    .execute();

            assertThat(meterRegistry.get("jooq.query")
                    .tag("name", "insertAuthor")
                    .timer().count())
                    .isEqualTo(1);
        }
    }

    @Test
    void timeUpdate() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:fluentSelect")) {
            MetricsDSLContext jooq = createDatabase(conn);

            jooq.tag("name", "updateAuthor").update(table("author")).set(field("author.first_name"), "jon")
                    .execute();

            assertThat(meterRegistry.get("jooq.query")
                    .tag("name", "updateAuthor")
                    .timer().count())
                    .isEqualTo(1);
        }
    }

    @Test
    void timingBatchQueriesNotSupported() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:fluentSelect")) {
            MetricsDSLContext jooq = createDatabase(conn);

            jooq.tag("name", "batch").batch(
                    jooq.insertInto(table("author")).values("3", "jon", "schneider"),
                    jooq.insertInto(table("author")).values("4", "jon", "schneider")
            ).execute();

            assertThat(meterRegistry.find("jooq.query").timer()).isNull();
        }
    }

    /**
     * Ensures that we are holding tag state in a way that doesn't conflict between two unexecuted queries.
     */
    @Test
    void timeTwoStatementsCreatedBeforeEitherIsExecuted() throws SQLException {
        try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:fluentSelect")) {
            MetricsDSLContext jooq = createDatabase(conn);

            SelectJoinStep<Record> select1 = jooq.tag("name", "selectAllAuthors").select(asterisk()).from("author");
            SelectJoinStep<Record1<Object>> select2 = jooq.tag("name", "selectAllAuthors2")
                    .select(field("first_name")).from("author");

            select1.fetch();
            select2.fetch();
            select1.fetch();

            assertThat(meterRegistry.get("jooq.query")
                    .tag("name", "selectAllAuthors")
                    .timer().count())
                    .isEqualTo(2);

            assertThat(meterRegistry.get("jooq.query")
                    .tag("name", "selectAllAuthors2")
                    .timer().count())
                    .isEqualTo(1);
        }
    }

    @NotNull
    private MetricsDSLContext createDatabase(Connection conn) {
        Configuration configuration = new DefaultConfiguration()
                .set(conn)
                .set(SQLDialect.H2);

        MetricsDSLContext jooq = withMetrics(DSL.using(configuration), meterRegistry, Tags.empty());

        jooq.execute("CREATE TABLE author (" +
                "  id int NOT NULL," +
                "  first_name varchar(255) DEFAULT NULL," +
                "  last_name varchar(255) DEFAULT NULL," +
                "  PRIMARY KEY (id)" +
                ")");

        jooq.execute("INSERT INTO author VALUES(1, 'jon', 'schneider')");
        return jooq;
    }
}

@@ -823,50 +823,8 @@
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-import org.jetbrains.annotations.NotNull;%0A
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@@ -6976,21 +6976,8 @@
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-    @NotNull%0A
     

Remove unnecessary `@NotNull` annotation from test code