//! Unit tests for exo-federation distributed cognitive mesh

#[cfg(test)]
mod post_quantum_crypto_tests {
    use super::*;
    // use exo_federation::*;

    #[test]
    #[cfg(feature = "post-quantum")]
    fn test_kyber_keypair_generation() {
        // Test CRYSTALS-Kyber keypair generation
        // let keypair = PostQuantumKeypair::generate();
        //
        // assert_eq!(keypair.public.len(), 1184);  // Kyber768 public key size
        // assert_eq!(keypair.secret.len(), 2400);  // Kyber768 secret key size
    }

    #[test]
    #[cfg(feature = "post-quantum")]
    fn test_kyber_encapsulation() {
        // Test key encapsulation
        // let keypair = PostQuantumKeypair::generate();
        // let (ciphertext, shared_secret1) = encapsulate(&keypair.public).unwrap();
        //
        // assert_eq!(ciphertext.len(), 1088);  // Kyber768 ciphertext size
        // assert_eq!(shared_secret1.len(), 32);  // 256-bit shared secret
    }

    #[test]
    #[cfg(feature = "post-quantum")]
    fn test_kyber_decapsulation() {
        // Test key decapsulation
        // let keypair = PostQuantumKeypair::generate();
        // let (ciphertext, shared_secret1) = encapsulate(&keypair.public).unwrap();
        //
        // let shared_secret2 = decapsulate(&ciphertext, &keypair.secret).unwrap();
        //
        // assert_eq!(shared_secret1, shared_secret2);  // Should match
    }

    #[test]
    #[cfg(feature = "post-quantum")]
    fn test_key_derivation() {
        // Test deriving encryption keys from shared secret
        // let shared_secret = [0u8; 32];
        // let (encrypt_key, mac_key) = derive_keys(&shared_secret);
        //
        // assert_eq!(encrypt_key.len(), 32);
        // assert_eq!(mac_key.len(), 32);
        // assert_ne!(encrypt_key, mac_key);  // Should be different
    }
}

#[cfg(test)]
mod federation_handshake_tests {
    use super::*;

    #[test]
    #[tokio::test]
    async fn test_join_federation_success() {
        // Test successful federation join
        // let mut node1 = FederatedMesh::new(config1);
        // let node2 = FederatedMesh::new(config2);
        //
        // let token = node1.join_federation(&node2.address()).await.unwrap();
        //
        // assert!(token.is_valid());
        // assert!(!token.is_expired());
    }

    #[test]
    #[tokio::test]
    async fn test_join_federation_timeout() {
        // Test handshake timeout
    }

    #[test]
    #[tokio::test]
    async fn test_join_federation_invalid_peer() {
        // Test joining with invalid peer address
    }

    #[test]
    #[tokio::test]
    async fn test_federation_token_expiry() {
        // Test token expiration
        // let token = FederationToken {
        //     expires: SubstrateTime::now() - 1000,
        //     ..Default::default()
        // };
        //
        // assert!(token.is_expired());
    }

    #[test]
    #[tokio::test]
    async fn test_capability_negotiation() {
        // Test capability exchange and negotiation
    }
}

#[cfg(test)]
mod byzantine_consensus_tests {
    use super::*;

    #[test]
    #[tokio::test]
    async fn test_byzantine_commit_sufficient_votes() {
        // Test consensus with 2f+1 agreement (n=3f+1)
        // let federation = setup_federation(node_count: 10);  // f=3, need 7 votes
        //
        // let update = StateUpdate::new("test_update");
        // let proof = federation.byzantine_commit(&update).await.unwrap();
        //
        // assert!(proof.votes.len() >= 7);
        // assert!(proof.is_valid());
    }

    #[test]
    #[tokio::test]
    async fn test_byzantine_commit_insufficient_votes() {
        // Test consensus failure with < 2f+1
        // let federation = setup_federation_with_failures(10, failures: 4);
        //
        // let update = StateUpdate::new("test_update");
        // let result = federation.byzantine_commit(&update).await;
        //
        // assert!(matches!(result, Err(Error::InsufficientConsensus)));
    }

    #[test]
    #[tokio::test]
    async fn test_byzantine_three_phase_commit() {
        // Test Pre-prepare -> Prepare -> Commit phases
    }

    #[test]
    #[tokio::test]
    async fn test_byzantine_malicious_proposal() {
        // Test rejection of invalid proposals
    }

    #[test]
    #[tokio::test]
    async fn test_byzantine_view_change() {
        // Test leader change on timeout
    }
}

#[cfg(test)]
mod crdt_reconciliation_tests {
    use super::*;

    #[test]
    fn test_crdt_gset_merge() {
        // Test G-Set (grow-only set) reconciliation
        // let mut set1 = GSet::new();
        // set1.add("item1");
        // set1.add("item2");
        //
        // let mut set2 = GSet::new();
        // set2.add("item2");
        // set2.add("item3");
        //
        // let merged = set1.merge(set2);
        //
        // assert_eq!(merged.len(), 3);
        // assert!(merged.contains("item1"));
        // assert!(merged.contains("item2"));
        // assert!(merged.contains("item3"));
    }

    #[test]
    fn test_crdt_lww_register() {
        // Test LWW-Register (last-writer-wins)
        // let mut reg1 = LWWRegister::new();
        // reg1.set("value1", timestamp: 1000);
        //
        // let mut reg2 = LWWRegister::new();
        // reg2.set("value2", timestamp: 2000);  // Later timestamp
        //
        // let merged = reg1.merge(reg2);
        //
        // assert_eq!(merged.get(), "value2");  // Latest wins
    }

    #[test]
    fn test_crdt_lww_map() {
        // Test LWW-Map reconciliation
    }

    #[test]
    fn test_crdt_reconcile_federated_results() {
        // Test reconciling federated query results
        // let responses = vec![
        //     FederatedResponse { results: vec![r1, r2], rankings: ... },
        //     FederatedResponse { results: vec![r2, r3], rankings: ... },
        // ];
        //
        // let reconciled = reconcile_crdt(responses, local_state);
        //
        // // Should contain union of results with reconciled rankings
    }
}

#[cfg(test)]
mod onion_routing_tests {
    use super::*;

    #[test]
    #[tokio::test]
    async fn test_onion_wrap_basic() {
        // Test onion wrapping with relay chain
        // let relays = vec![relay1, relay2, relay3];
        // let query = Query::new("test");
        //
        // let wrapped = onion_wrap(&query, &relays);
        //
        // // Should have layers for each relay
        // assert_eq!(wrapped.num_layers(), relays.len());
    }

    #[test]
    #[tokio::test]
    async fn test_onion_routing_privacy() {
        // Test that intermediate nodes cannot decrypt payload
        // let wrapped = onion_wrap(&query, &relays);
        //
        // // Intermediate relay should not be able to see final query
        // let relay1_view = relays[1].decrypt_layer(wrapped);
        // assert!(!relay1_view.contains_plaintext_query());
    }

    #[test]
    #[tokio::test]
    async fn test_onion_unwrap() {
        // Test unwrapping onion layers
        // let wrapped = onion_wrap(&query, &relays);
        // let response = send_through_onion(wrapped).await;
        //
        // let unwrapped = onion_unwrap(response, &local_keys, &relays);
        //
        // assert_eq!(unwrapped, expected_response);
    }

    #[test]
    #[tokio::test]
    async fn test_onion_routing_failure() {
        // Test handling of relay failure
    }
}

#[cfg(test)]
mod federated_query_tests {
    use super::*;

    #[test]
    #[tokio::test]
    async fn test_federated_query_local_scope() {
        // Test query with local-only scope
        // let federation = setup_federation();
        // let results = federation.federated_query(&query, FederationScope::Local).await;
        //
        // // Should only return local results
        // assert!(results.iter().all(|r| r.source.is_local()));
    }

    #[test]
    #[tokio::test]
    async fn test_federated_query_global_scope() {
        // Test query broadcast to all peers
        // let federation = setup_federation_with_peers(5);
        // let results = federation.federated_query(&query, FederationScope::Global).await;
        //
        // // Should have results from multiple peers
        // let sources: HashSet<_> = results.iter().map(|r| r.source).collect();
        // assert!(sources.len() > 1);
    }

    #[test]
    #[tokio::test]
    async fn test_federated_query_scoped() {
        // Test query with specific peer scope
    }

    #[test]
    #[tokio::test]
    async fn test_federated_query_timeout() {
        // Test handling of slow/unresponsive peers
    }
}

#[cfg(test)]
mod raft_consensus_tests {
    use super::*;

    #[test]
    #[tokio::test]
    async fn test_raft_leader_election() {
        // Test Raft leader election
        // let cluster = setup_raft_cluster(5);
        //
        // // Wait for leader election
        // tokio::time::sleep(Duration::from_millis(1000)).await;
        //
        // let leaders: Vec<_> = cluster.nodes.iter()
        //     .filter(|n| n.is_leader())
        //     .collect();
        //
        // assert_eq!(leaders.len(), 1);  // Exactly one leader
    }

    #[test]
    #[tokio::test]
    async fn test_raft_log_replication() {
        // Test log replication
    }

    #[test]
    #[tokio::test]
    async fn test_raft_commit() {
        // Test entry commitment
    }
}

#[cfg(test)]
mod encrypted_channel_tests {
    use super::*;

    #[test]
    #[tokio::test]
    async fn test_encrypted_channel_send() {
        // Test sending encrypted message
        // let channel = EncryptedChannel::new(peer, encrypt_key, mac_key);
        // channel.send(message).await.unwrap();
        //
        // // Message should be encrypted
    }

    #[test]
    #[tokio::test]
    async fn test_encrypted_channel_receive() {
        // Test receiving encrypted message
    }

    #[test]
    #[tokio::test]
    async fn test_encrypted_channel_mac_verification() {
        // Test MAC verification on receive
        // Should reject messages with invalid MAC
    }

    #[test]
    #[tokio::test]
    async fn test_encrypted_channel_replay_attack() {
        // Test replay attack prevention
    }
}

#[cfg(test)]
mod edge_cases_tests {
    use super::*;

    #[test]
    #[tokio::test]
    async fn test_single_node_federation() {
        // Test federation with single node
        // let federation = FederatedMesh::new(config);
        //
        // // Should handle queries locally
        // let results = federation.federated_query(&query, FederationScope::Global).await;
        // assert!(!results.is_empty());
    }

    #[test]
    #[tokio::test]
    async fn test_network_partition() {
        // Test handling of network partition
    }

    #[test]
    #[tokio::test]
    async fn test_byzantine_fault_tolerance_limit() {
        // Test f < n/3 Byzantine fault tolerance limit
        // With n=10, can tolerate f=3 faulty nodes
        // With f=4, consensus should fail
    }

    #[test]
    #[tokio::test]
    async fn test_concurrent_commits() {
        // Test concurrent state updates
    }
}