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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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package org.apache.james.mailbox.cassandra.mail;

import static org.assertj.core.api.Assertions.assertThat;

import java.util.List;
import java.util.Optional;

import javax.mail.Flags;
import javax.mail.Flags.Flag;

import org.apache.james.backends.cassandra.CassandraCluster;
import org.apache.james.backends.cassandra.CassandraClusterExtension;
import org.apache.james.backends.cassandra.components.CassandraModule;
import org.apache.james.backends.cassandra.versions.CassandraSchemaVersionModule;
import org.apache.james.mailbox.MessageUid;
import org.apache.james.mailbox.ModSeq;
import org.apache.james.mailbox.cassandra.ids.CassandraId;
import org.apache.james.mailbox.cassandra.ids.CassandraMessageId;
import org.apache.james.mailbox.cassandra.modules.CassandraMessageModule;
import org.apache.james.mailbox.model.ComposedMessageId;
import org.apache.james.mailbox.model.ComposedMessageIdWithMetaData;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;

import com.datastax.driver.core.utils.UUIDs;

import reactor.core.publisher.Flux;

class CassandraMessageIdToImapUidDAOTest {
    public static final CassandraModule MODULE = CassandraModule.aggregateModules(
            CassandraSchemaVersionModule.MODULE,
            CassandraMessageModule.MODULE);

    @RegisterExtension
    static CassandraClusterExtension cassandraCluster = new CassandraClusterExtension(MODULE);

    private CassandraMessageId.Factory messageIdFactory;

    private CassandraMessageIdToImapUidDAO testee;

    @BeforeEach
    void setUp(CassandraCluster cassandra) {
        messageIdFactory = new CassandraMessageId.Factory();
        testee = new CassandraMessageIdToImapUidDAO(
            cassandra.getConf(),
            cassandraCluster.getCassandraConsistenciesConfiguration(),
            messageIdFactory);
    }

    @Test
    void deleteShouldNotThrowWhenRowDoesntExist() {
        testee.delete(messageIdFactory.of(UUIDs.timeBased()), CassandraId.timeBased())
            .block();
    }

    @Test
    void deleteShouldDeleteWhenRowExists() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                    .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                    .flags(new Flags())
                    .modSeq(ModSeq.of(1))
                    .build())
                .block();

        testee.delete(messageId, mailboxId).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).isEmpty();
    }

    @Test
    void deleteShouldDeleteOnlyConcernedRowWhenMultipleRowExists() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        CassandraId mailboxId2 = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);
        MessageUid messageUid2 = MessageUid.of(2);
        Flux.merge(
            testee.insert(ComposedMessageIdWithMetaData.builder()
                    .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                    .flags(new Flags())
                    .modSeq(ModSeq.of(1))
                    .build()),
            testee.insert(ComposedMessageIdWithMetaData.builder()
                    .composedMessageId(new ComposedMessageId(mailboxId2, messageId, messageUid2))
                    .flags(new Flags())
                    .modSeq(ModSeq.of(1))
                    .build()))
        .blockLast();

        testee.delete(messageId, mailboxId).block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId2, messageId, messageUid2))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build();
        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.empty()).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void insertShouldWork() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build();
        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldReturnTrueWhenOldModSeqMatches() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageIdWithMetaData composedMessageIdWithFlags = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build();
        testee.insert(composedMessageIdWithFlags).block();

        Boolean result = testee.updateMetadata(composedMessageIdWithFlags, ModSeq.of(1)).block();

        assertThat(result).isTrue();
    }

    @Test
    void updateShouldReturnFalseWhenOldModSeqDoesntMatch() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageIdWithMetaData composedMessageIdWithFlags = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build();
        testee.insert(composedMessageIdWithFlags).block();

        Boolean result = testee.updateMetadata(composedMessageIdWithFlags, ModSeq.of(3)).block();

        assertThat(result).isFalse();
    }

    @Test
    void updateShouldUpdateModSeq() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateAnsweredFlag() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags(Flag.ANSWERED))
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateDeletedFlag() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags(Flag.DELETED))
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateDraftFlag() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags(Flag.DRAFT))
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateFlaggedFlag() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags(Flag.FLAGGED))
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateRecentFlag() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags(Flag.RECENT))
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateSeenFlag() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags(Flag.SEEN))
                .modSeq(ModSeq.of(2))
                .build();
        assertThat(testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block())
            .isTrue();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateUserFlag() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags(Flag.USER))
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void updateShouldUpdateUserFlags() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);

        ComposedMessageId composedMessageId = new ComposedMessageId(mailboxId, messageId, messageUid);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        Flags flags = new Flags();
        flags.add("myCustomFlag");
        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(composedMessageId)
                .flags(flags)
                .modSeq(ModSeq.of(2))
                .build();
        testee.updateMetadata(expectedComposedMessageId, ModSeq.of(1)).block();

        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();
        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void retrieveShouldReturnOneMessageWhenKeyMatches() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);
        testee.insert(ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build())
            .block();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build();
        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.of(mailboxId)).collectList().block();

        assertThat(messages).containsOnly(expectedComposedMessageId);
    }

    @Test
    void retrieveShouldReturnMultipleMessagesWhenMessageIdMatches() {
        CassandraMessageId messageId = messageIdFactory.of(UUIDs.timeBased());
        CassandraId mailboxId = CassandraId.timeBased();
        CassandraId mailboxId2 = CassandraId.timeBased();
        MessageUid messageUid = MessageUid.of(1);
        MessageUid messageUid2 = MessageUid.of(2);
        Flux.merge(
                testee.insert(ComposedMessageIdWithMetaData.builder()
                    .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                    .flags(new Flags())
                    .modSeq(ModSeq.of(1))
                    .build()),
                testee.insert(ComposedMessageIdWithMetaData.builder()
                    .composedMessageId(new ComposedMessageId(mailboxId2, messageId, messageUid2))
                    .flags(new Flags())
                    .modSeq(ModSeq.of(1))
                    .build()))
        .blockLast();

        ComposedMessageIdWithMetaData expectedComposedMessageId = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId, messageId, messageUid))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build();
        ComposedMessageIdWithMetaData expectedComposedMessageId2 = ComposedMessageIdWithMetaData.builder()
                .composedMessageId(new ComposedMessageId(mailboxId2, messageId, messageUid2))
                .flags(new Flags())
                .modSeq(ModSeq.of(1))
                .build();
        List<ComposedMessageIdWithMetaData> messages = testee.retrieve(messageId, Optional.empty()).collectList().block();

        assertThat(messages).containsOnly(expectedComposedMessageId, expectedComposedMessageId2);
    }
}
