/*
 * Copyright Debezium Authors.
 *
 * Licensed under the Apache Software License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
 */
package io.debezium.testing.testcontainers;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Properties;

import org.testcontainers.containers.JdbcDatabaseContainer;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * Class that represents the config element of the configuration document.
 */
public class ConnectorConfiguration {

    public static final String CONNECTOR = "connector.class";
    public static final String HOSTNAME = "database.hostname";
    public static final String CONNECTION_STRING = "mongodb.connection.string";
    public static final String PORT = "database.port";
    public static final String USER = "database.user";
    public static final String PASSWORD = "database.password";
    public static final String DBNAME = "database.dbname";

    private static final ObjectMapper MAPPER = new ObjectMapper();

    private final ObjectNode configNode;

    protected ConnectorConfiguration() {
        this.configNode = MAPPER.createObjectNode();
        this.configNode.put("tasks.max", 1);
    }

    public static ConnectorConfiguration create() {
        return new ConnectorConfiguration();
    }

    static ConnectorConfiguration from(JsonNode configNode) {
        final ConnectorConfiguration configuration = new ConnectorConfiguration();
        configNode.fields().forEachRemaining(e -> configuration.configNode.set(e.getKey(), e.getValue()));
        return configuration;
    }

    public static ConnectorConfiguration from(Map<String, ?> map) {
        final ConnectorConfiguration configuration = new ConnectorConfiguration();
        map.forEach((key, val) -> configuration.configNode.put(key, val.toString()));
        return configuration;
    }

    public static ConnectorConfiguration forJdbcContainer(JdbcDatabaseContainer<?> jdbcDatabaseContainer) {
        ConnectorConfiguration configuration = new ConnectorConfiguration();

        configuration.with(HOSTNAME, jdbcDatabaseContainer.getContainerInfo().getConfig().getHostName());

        final List<Integer> exposedPorts = jdbcDatabaseContainer.getExposedPorts();
        configuration.with(PORT, exposedPorts.get(0));

        configuration.with(USER, jdbcDatabaseContainer.getUsername());
        configuration.with(PASSWORD, jdbcDatabaseContainer.getPassword());

        final String driverClassName = jdbcDatabaseContainer.getDriverClassName();
        configuration.with(CONNECTOR, ConnectorResolver.getConnectorByJdbcDriver(driverClassName));

        // This property is valid for all databases except MySQL and SQL Server
        if (!isMySQL(driverClassName) && !isSQLServer(driverClassName)) {
            configuration.with(DBNAME, jdbcDatabaseContainer.getDatabaseName());
        }

        return configuration;
    }

    public static ConnectorConfiguration forMongoDbContainer(MongoDbContainer mongoDbContainer) {
        ConnectorConfiguration configuration = new ConnectorConfiguration();
        configuration.with(CONNECTOR, "io.debezium.connector.mongodb.MongoDbConnector")
                .with(CONNECTION_STRING, "mongodb://" + mongoDbContainer.getNamedAddress());

        return configuration;
    }

    public static ConnectorConfiguration forMongoDbReplicaSet(MongoDbReplicaSet rs) {
        ConnectorConfiguration configuration = new ConnectorConfiguration();
        configuration.with(CONNECTOR, "io.debezium.connector.mongodb.MongoDbConnector")
                .with(CONNECTION_STRING, rs.getConnectionString());

        return configuration;
    }

    private static boolean isMySQL(String driverClassName) {
        return "com.mysql.cj.jdbc.Driver".equals(driverClassName) || "com.mysql.jdbc.Driver".equals(driverClassName);
    }

    private static boolean isSQLServer(String driverClassName) {
        return "com.microsoft.sqlserver.jdbc.SQLServerDriver".equals(driverClassName);
    }

    public ConnectorConfiguration with(String key, String value) {
        this.configNode.put(key, value);
        return this;
    }

    public ConnectorConfiguration with(String key, Integer value) {
        this.configNode.put(key, value);
        return this;
    }

    public ConnectorConfiguration with(String key, Long value) {
        this.configNode.put(key, value);
        return this;
    }

    public ConnectorConfiguration with(String key, Boolean value) {
        this.configNode.put(key, value);
        return this;
    }

    public ConnectorConfiguration with(String key, Double value) {
        this.configNode.put(key, value);
        return this;
    }

    public ConnectorConfiguration remove(String key) {
        this.configNode.remove(key);
        return this;
    }

    public String toJson() {
        return getConfiguration().toString();
    }

    public Properties asProperties() {
        var connectorProperties = new Properties();
        Map<?, ?> configMap = MAPPER.convertValue(configNode, HashMap.class);
        configMap.values().removeIf(Objects::isNull);
        connectorProperties.putAll(configMap);
        return connectorProperties;
    }

    ObjectNode getConfiguration() {
        return configNode;
    }
}
