package dmo.fs.spa.db.db2;

import java.io.IOException;
import java.sql.SQLException;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ConcurrentHashMap;

import dmo.fs.spa.db.SpaDbConfiguration;
import dmo.fs.vertx.Server;
import io.vertx.rxjava3.db2client.DB2Builder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.databind.JsonNode;
import dmo.fs.spa.utils.SpaLogin;
import dmo.fs.spa.utils.SpaLoginImpl;
import dmo.fs.utils.DodexUtil;
import io.reactivex.rxjava3.core.Completable;
import io.reactivex.rxjava3.core.Single;
import io.reactivex.rxjava3.disposables.Disposable;
import io.vertx.core.Future;
import io.vertx.db2client.DB2ConnectOptions;
import io.vertx.core.Promise;
import io.vertx.rxjava3.core.Vertx;
import io.vertx.rxjava3.sqlclient.Row;
import io.vertx.rxjava3.sqlclient.RowSet;
import io.vertx.sqlclient.PoolOptions;

public class SpaDatabaseIbmDB2 extends DbIbmDB2 {
    private final static Logger logger = LoggerFactory.getLogger(SpaDatabaseIbmDB2.class.getName());
    private Vertx vertx;
    protected Disposable disposable;
    protected Properties dbProperties = new Properties();
    protected Map<String, String> dbOverrideMap = new ConcurrentHashMap<>();
    protected Map<String, String> dbMap = new ConcurrentHashMap<>();
    protected JsonNode defaultNode;
    protected String webEnv = System.getenv("VERTXWEB_ENVIRONMENT");
    protected DodexUtil dodexUtil = new DodexUtil();

    public SpaDatabaseIbmDB2(Map<String, String> dbOverrideMap, Properties dbOverrideProps)
            throws InterruptedException, IOException, SQLException {
        super();

        defaultNode = dodexUtil.getDefaultNode();

        webEnv = webEnv == null || "prod".equals(webEnv) ? "prod" : "dev";

        dbMap = dodexUtil.jsonNodeToMap(defaultNode, webEnv);
        dbProperties = dodexUtil.mapToProperties(dbMap);

        if (dbOverrideProps != null) {
            this.dbProperties = dbOverrideProps;
        }
        if (dbOverrideMap != null) {
            this.dbOverrideMap = dbOverrideMap;
        }

        SpaDbConfiguration.mapMerge(dbMap, dbOverrideMap);
        // databaseSetup();
    }

    public SpaDatabaseIbmDB2() throws InterruptedException, IOException, SQLException {
        super();

        defaultNode = dodexUtil.getDefaultNode();
        webEnv = webEnv == null || "prod".equals(webEnv) ? "prod" : "dev";

        dbMap = dodexUtil.jsonNodeToMap(defaultNode, webEnv);
        dbProperties = dodexUtil.mapToProperties(dbMap);

        // databaseSetup();
    }

    @Override
    public Future<Void> databaseSetup() throws InterruptedException, SQLException {

        // Override default credentials
        // dbProperties.setProperty("user", "myUser");
        // dbProperties.setProperty("password", "myPassword");
        // dbProperties.setProperty("ssl", "false");

        if ("dev".equals(webEnv)) {
            // dbMap.put("dbname", "/myDbname"); // this wiil be merged into the default map
            SpaDbConfiguration.configureTestDefaults(dbMap, dbProperties);
        } else {
            SpaDbConfiguration.configureDefaults(dbMap, dbProperties); // Prod
        }

        PoolOptions poolOptions =
                new PoolOptions().setMaxSize(Runtime.getRuntime().availableProcessors() * 5);

        DB2ConnectOptions connectOptions;

        connectOptions = new DB2ConnectOptions().setHost(dbMap.get("host2"))
                .setPort(Integer.valueOf(dbMap.get("port")))
                .setUser(dbProperties.getProperty("user").toString())
                .setPassword(dbProperties.getProperty("password").toString())
                .setDatabase(dbMap.get("database"))
                .setSsl(Boolean.valueOf(dbProperties.getProperty("ssl")))
        // .setCachePreparedStatements(true)
        ;

        vertx = Server.getRxVertx();

        pool = DB2Builder
            .pool()
            .with(poolOptions)
            .connectingTo(connectOptions)
            .using(vertx)
            .build();

        Completable completable =
                pool.rxGetConnection()
                        .flatMapCompletable(conn -> conn.rxBegin().flatMapCompletable(tx -> conn
                                .query(CHECKLOGINSQL.replace("DB2INST1", dbMap.get("tabschema")))
                                .rxExecute().doOnSuccess(rows -> {
                                    if (rows.size() == 0) {
                                        final String usersSql = getCreateTable("LOGIN");

                                        Single<RowSet<Row>> crow =
                                                conn.query(usersSql).rxExecute().doOnError(err -> {
                                                    logger.info("Login Table Error: {}", err.getMessage());
                                                }).doOnSuccess(result -> {
                                                    logger.info("Login Table Added.");
                                                });

                                        crow.subscribe(result -> {
                                            //
                                        }, err -> {
                                            logger.info("Login Table Error2: {}", err.getMessage());
                                        });
                                    }
                                }).doOnError(err -> {
                                    logger.info("Login Table Error3: {}", err.getMessage());

                                }).flatMapCompletable(res -> tx.rxCommit())));

        Promise<Void> setupPromise = Promise.promise();
        completable.subscribe(() -> {
            try {
                setupSql(pool);
                setupPromise.complete();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }, err -> {
            logger.info("Tables Create Error: {}", err.getMessage());
        });

        return setupPromise.future();
    }

    @Override
    public SpaLogin createSpaLogin() {
        return new SpaLoginImpl();
    }

    @Override
    @SuppressWarnings("unchecked")
    public <T> T getPool() {
        return (T) pool;
    }

    @Override
    public Vertx getVertx() {
        return vertx;
    }

    @Override
    public void setVertx(Vertx vertx) {
        this.vertx = vertx;
    }
}