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package io.elastic.sailor;

import com.google.inject.name.Names;
import io.elastic.sailor.impl.MessageEncoding;
import io.elastic.sailor.impl.MessageFormat;
import io.elastic.sailor.impl.MessageResolverImpl;


public class AmqpEnvironmentModule extends AbstractSailorModule {
    @Override
    protected void configure() {

        bindRequiredStringEnvVar(Constants.ENV_VAR_AMQP_URI);
        bindRequiredStringEnvVar(Constants.ENV_VAR_LISTEN_MESSAGES_ON);
        bindRequiredStringEnvVar(Constants.ENV_VAR_PUBLISH_MESSAGES_TO);
        bindRequiredStringEnvVar(Constants.ENV_VAR_DATA_ROUTING_KEY);
        bindRequiredStringEnvVar(Constants.ENV_VAR_ERROR_ROUTING_KEY);
        bindRequiredStringEnvVar(Constants.ENV_VAR_REBOUND_ROUTING_KEY);
        bindRequiredStringEnvVar(Constants.ENV_VAR_SNAPSHOT_ROUTING_KEY);
        bindRequiredStringEnvVar(Constants.ENV_VAR_MESSAGE_CRYPTO_PASSWORD);
        bindRequiredStringEnvVar(Constants.ENV_VAR_MESSAGE_CRYPTO_IV);

        // 1MB
        bindOptionalIntegerEnvVar(Constants.ENV_VAR_OBJECT_STORAGE_SIZE_THRESHOLD,
                MessageResolverImpl.OBJECT_STORAGE_SIZE_THRESHOLD_DEFAULT);

        bindProtocolVersion();

        bindEnum(MessageFormat.class, Constants.ENV_VAR_INPUT_FORMAT, MessageFormat.DEFAULT);

        bindOptionalBooleanValue(Constants.ENV_VAR_NO_ERROR_REPLIES, false);
    }

    private  void bindProtocolVersion() {

        final int protocolVersion = getOptionalIntegerValue(Constants.ENV_VAR_PROTOCOL_VERSION,
                MessageEncoding.BASE64.protocolVersion);

        bind(MessageEncoding.class)
                .annotatedWith(Names.named(Constants.ENV_VAR_PROTOCOL_VERSION))
                .toInstance(MessageEncoding.fromProtocolVersion(protocolVersion));
    }

    private void bindMessageFormat() {
        MessageFormat format = MessageFormat.DEFAULT;

        final String value = Utils.getOptionalEnvVar(Constants.ENV_VAR_INPUT_FORMAT);

        if (value != null) {
            format = MessageFormat.valueOf(value.toLowerCase());
        }

        bind(MessageFormat.class)
                .annotatedWith(Names.named(Constants.ENV_VAR_INPUT_FORMAT))
                .toInstance(format);
    }
}