//! Integration Tests: Hypergraph Substrate
//!
//! These tests verify higher-order relational reasoning capabilities
//! including hyperedge creation, topological queries, and sheaf consistency.

#[cfg(test)]
mod hypergraph_tests {
    // Note: These imports will be available once crates are implemented
    // use exo_hypergraph::{HypergraphSubstrate, Hyperedge, TopologicalQuery};
    // use exo_core::{EntityId, Relation, Pattern};

    /// Test: Create entities and hyperedges, then query topology
    ///
    /// Flow:
    /// 1. Create multiple entities in the substrate
    /// 2. Create hyperedges spanning multiple entities
    /// 3. Query the hypergraph topology
    /// 4. Verify hyperedge relationships
    #[tokio::test]
    #[ignore] // Remove when exo-hypergraph exists
    async fn test_hyperedge_creation_and_query() {
        // TODO: Implement once exo-hypergraph exists

        // Expected API:
        // let mut hypergraph = HypergraphSubstrate::new();
        //
        // // Create entities
        // let entity1 = hypergraph.create_entity(Pattern { ... }).await.unwrap();
        // let entity2 = hypergraph.create_entity(Pattern { ... }).await.unwrap();
        // let entity3 = hypergraph.create_entity(Pattern { ... }).await.unwrap();
        //
        // // Create hyperedge spanning 3 entities
        // let relation = Relation::new("collaborates_on");
        // let hyperedge_id = hypergraph.create_hyperedge(
        //     &[entity1, entity2, entity3],
        //     &relation
        // ).await.unwrap();
        //
        // // Query hyperedges containing entity1
        // let edges = hypergraph.get_hyperedges_for_entity(entity1).await.unwrap();
        // assert!(edges.contains(&hyperedge_id));
        //
        // // Verify all entities are in the hyperedge
        // let hyperedge = hypergraph.get_hyperedge(hyperedge_id).await.unwrap();
        // assert_eq!(hyperedge.entities.len(), 3);
        // assert!(hyperedge.entities.contains(&entity1));
        // assert!(hyperedge.entities.contains(&entity2));
        // assert!(hyperedge.entities.contains(&entity3));

        panic!("Implement this test once exo-hypergraph crate exists");
    }

    /// Test: Persistent homology computation
    ///
    /// Verifies topological feature extraction across scales.
    #[tokio::test]
    #[ignore]
    async fn test_persistent_homology() {
        // TODO: Implement once exo-hypergraph exists

        // Expected API:
        // let hypergraph = build_test_hypergraph();
        //
        // // Compute 1-dimensional persistent features (loops/cycles)
        // let persistence_diagram = hypergraph.persistent_homology(
        //     dimension=1,
        //     epsilon_range=(0.0, 1.0)
        // ).await.unwrap();
        //
        // // Verify persistence pairs
        // assert!(!persistence_diagram.pairs.is_empty());
        //
        // // Check for essential features (never die)
        // let essential = persistence_diagram.pairs.iter()
        //     .filter(|(birth, death)| death.is_infinite())
        //     .count();
        // assert!(essential > 0);

        panic!("Implement this test once exo-hypergraph crate exists");
    }

    /// Test: Betti numbers (topological invariants)
    ///
    /// Verifies computation of connected components and holes.
    #[tokio::test]
    #[ignore]
    async fn test_betti_numbers() {
        // TODO: Implement once exo-hypergraph exists

        // Expected API:
        // let hypergraph = build_test_hypergraph_with_holes();
        //
        // // Compute Betti numbers up to dimension 2
        // let betti = hypergraph.betti_numbers(max_dim=2).await.unwrap();
        //
        // // b0 = connected components
        // // b1 = 1-dimensional holes (loops)
        // // b2 = 2-dimensional holes (voids)
        // assert_eq!(betti.len(), 3);
        // assert!(betti[0] > 0); // At least one connected component

        panic!("Implement this test once exo-hypergraph crate exists");
    }

    /// Test: Sheaf consistency check
    ///
    /// Verifies local-to-global coherence across hypergraph sections.
    #[tokio::test]
    #[ignore]
    async fn test_sheaf_consistency() {
        // TODO: Implement once exo-hypergraph exists with sheaf support

        // Expected API:
        // let hypergraph = HypergraphSubstrate::with_sheaf();
        //
        // // Create overlapping sections
        // let section1 = hypergraph.create_section(entities=[e1, e2], data=...);
        // let section2 = hypergraph.create_section(entities=[e2, e3], data=...);
        //
        // // Check consistency
        // let result = hypergraph.check_sheaf_consistency(&[section1, section2]).await.unwrap();
        //
        // match result {
        //     SheafConsistencyResult::Consistent => { /* expected */ },
        //     SheafConsistencyResult::Inconsistent(errors) => {
        //         panic!("Sheaf inconsistency: {:?}", errors);
        //     },
        //     _ => panic!("Unexpected result"),
        // }

        panic!("Implement this test once exo-hypergraph sheaf support exists");
    }

    /// Test: Complex relational query
    ///
    /// Verifies ability to query complex multi-entity relationships.
    #[tokio::test]
    #[ignore]
    async fn test_complex_relational_query() {
        // TODO: Implement once exo-hypergraph exists

        // Scenario:
        // - Create a knowledge graph with multiple relation types
        // - Query for patterns like "all entities related to X through Y"
        // - Verify transitive relationships

        panic!("Implement this test once exo-hypergraph crate exists");
    }

    /// Test: Hypergraph with temporal evolution
    ///
    /// Verifies hypergraph can track changes over time.
    #[tokio::test]
    #[ignore]
    async fn test_temporal_hypergraph() {
        // TODO: Implement once exo-hypergraph + exo-temporal integrated

        // Expected:
        // - Create hyperedges at different timestamps
        // - Query hypergraph state at specific time points
        // - Verify temporal consistency

        panic!("Implement this test once temporal integration exists");
    }

    // Helper function for building test hypergraphs
    #[allow(dead_code)]
    fn build_test_hypergraph() {
        // TODO: Implement helper to build standard test topology
        panic!("Helper not implemented yet");
    }
}