//! Unit tests for exo-hypergraph substrate

#[cfg(test)]
mod hyperedge_creation_tests {
    use super::*;
    // use exo_hypergraph::*;

    #[test]
    fn test_create_basic_hyperedge() {
        // Test creating a hyperedge with 3 entities
        // let mut substrate = HypergraphSubstrate::new();
        //
        // let e1 = EntityId::new();
        // let e2 = EntityId::new();
        // let e3 = EntityId::new();
        //
        // let relation = Relation::new("connects");
        // let hyperedge_id = substrate.create_hyperedge(
        //     &[e1, e2, e3],
        //     &relation
        // ).unwrap();
        //
        // assert!(substrate.hyperedge_exists(hyperedge_id));
    }

    #[test]
    fn test_create_hyperedge_2_entities() {
        // Test creating hyperedge with 2 entities (edge case)
    }

    #[test]
    fn test_create_hyperedge_many_entities() {
        // Test creating hyperedge with many entities (10+)
        // for n in [10, 50, 100] {
        //     let entities: Vec<_> = (0..n).map(|_| EntityId::new()).collect();
        //     let result = substrate.create_hyperedge(&entities, &relation);
        //     assert!(result.is_ok());
        // }
    }

    #[test]
    fn test_create_hyperedge_invalid_entity() {
        // Test error when entity doesn't exist
        // let mut substrate = HypergraphSubstrate::new();
        // let nonexistent = EntityId::new();
        //
        // let result = substrate.create_hyperedge(&[nonexistent], &relation);
        // assert!(result.is_err());
    }

    #[test]
    fn test_create_hyperedge_duplicate_entities() {
        // Test handling of duplicate entities in set
        // let e1 = EntityId::new();
        // let result = substrate.create_hyperedge(&[e1, e1], &relation);
        // // Should either deduplicate or error
    }
}

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

    #[test]
    fn test_query_hyperedges_by_entity() {
        // Test finding all hyperedges containing an entity
        // let mut substrate = HypergraphSubstrate::new();
        // let e1 = substrate.add_entity("entity_1");
        //
        // let h1 = substrate.create_hyperedge(&[e1, e2], &r1).unwrap();
        // let h2 = substrate.create_hyperedge(&[e1, e3], &r2).unwrap();
        //
        // let containing_e1 = substrate.hyperedges_containing(e1);
        // assert_eq!(containing_e1.len(), 2);
        // assert!(containing_e1.contains(&h1));
        // assert!(containing_e1.contains(&h2));
    }

    #[test]
    fn test_query_hyperedges_by_relation() {
        // Test finding hyperedges by relation type
    }

    #[test]
    fn test_query_hyperedges_by_entity_set() {
        // Test finding hyperedges spanning specific entity set
    }
}

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

    #[test]
    fn test_persistent_homology_0d() {
        // Test 0-dimensional homology (connected components)
        // let substrate = build_test_hypergraph();
        //
        // let diagram = substrate.persistent_homology(0, (0.0, 1.0));
        //
        // // Verify number of connected components
        // assert_eq!(diagram.num_features(), expected_components);
    }

    #[test]
    fn test_persistent_homology_1d() {
        // Test 1-dimensional homology (cycles/loops)
        // Create hypergraph with known cycle structure
        // let substrate = build_cycle_hypergraph();
        //
        // let diagram = substrate.persistent_homology(1, (0.0, 1.0));
        //
        // // Verify cycle detection
        // assert!(diagram.has_persistent_features());
    }

    #[test]
    fn test_persistent_homology_2d() {
        // Test 2-dimensional homology (voids)
    }

    #[test]
    fn test_persistence_diagram_birth_death() {
        // Test birth-death times in persistence diagram
        // let diagram = substrate.persistent_homology(1, (0.0, 2.0));
        //
        // for feature in diagram.features() {
        //     assert!(feature.birth < feature.death);
        //     assert!(feature.birth >= 0.0);
        //     assert!(feature.death <= 2.0);
        // }
    }

    #[test]
    fn test_persistence_diagram_essential_features() {
        // Test detection of essential (infinite persistence) features
    }
}

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

    #[test]
    fn test_betti_numbers_simple_complex() {
        // Test Betti numbers for simple simplicial complex
        // let substrate = build_simple_complex();
        // let betti = substrate.betti_numbers(2);
        //
        // // For a sphere: b0=1, b1=0, b2=1
        // assert_eq!(betti[0], 1);  // One connected component
        // assert_eq!(betti[1], 0);  // No holes
        // assert_eq!(betti[2], 1);  // One void
    }

    #[test]
    fn test_betti_numbers_torus() {
        // Test Betti numbers for torus-like structure
        // Torus: b0=1, b1=2, b2=1
    }

    #[test]
    fn test_betti_numbers_disconnected() {
        // Test with multiple connected components
        // let substrate = build_disconnected_complex();
        // let betti = substrate.betti_numbers(0);
        //
        // assert_eq!(betti[0], num_components);
    }
}

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

    #[test]
    #[cfg(feature = "sheaf-consistency")]
    fn test_sheaf_consistency_check_consistent() {
        // Test sheaf consistency on consistent structure
        // let substrate = build_consistent_sheaf();
        // let sections = vec![section1, section2];
        //
        // let result = substrate.check_sheaf_consistency(&sections);
        //
        // assert!(matches!(result, SheafConsistencyResult::Consistent));
    }

    #[test]
    #[cfg(feature = "sheaf-consistency")]
    fn test_sheaf_consistency_check_inconsistent() {
        // Test detection of inconsistency
        // let substrate = build_inconsistent_sheaf();
        // let sections = vec![section1, section2];
        //
        // let result = substrate.check_sheaf_consistency(&sections);
        //
        // match result {
        //     SheafConsistencyResult::Inconsistent(inconsistencies) => {
        //         assert!(!inconsistencies.is_empty());
        //     }
        //     _ => panic!("Expected inconsistency"),
        // }
    }

    #[test]
    #[cfg(feature = "sheaf-consistency")]
    fn test_sheaf_restriction_maps() {
        // Test restriction map operations
    }
}

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

    #[test]
    fn test_add_simplex_0d() {
        // Test adding 0-simplices (vertices)
    }

    #[test]
    fn test_add_simplex_1d() {
        // Test adding 1-simplices (edges)
    }

    #[test]
    fn test_add_simplex_2d() {
        // Test adding 2-simplices (triangles)
    }

    #[test]
    fn test_add_simplex_invalid() {
        // Test adding simplex with non-existent vertices
    }

    #[test]
    fn test_simplex_boundary() {
        // Test boundary operator
    }
}

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

    #[test]
    fn test_entity_index_update() {
        // Test entity->hyperedges inverted index
        // let mut substrate = HypergraphSubstrate::new();
        // let e1 = substrate.add_entity("e1");
        //
        // let h1 = substrate.create_hyperedge(&[e1], &r1).unwrap();
        //
        // let containing = substrate.entity_index.get(&e1);
        // assert!(containing.contains(&h1));
    }

    #[test]
    fn test_relation_index_update() {
        // Test relation->hyperedges index
    }

    #[test]
    fn test_concurrent_index_access() {
        // Test DashMap concurrent access
    }
}

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

    #[test]
    fn test_ruvector_graph_integration() {
        // Test integration with ruvector-graph base
        // Verify hypergraph extends ruvector-graph properly
    }

    #[test]
    fn test_graph_database_queries() {
        // Test using base GraphDatabase for queries
    }
}

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

    #[test]
    fn test_empty_hypergraph() {
        // Test operations on empty hypergraph
        // let substrate = HypergraphSubstrate::new();
        // let betti = substrate.betti_numbers(2);
        // assert_eq!(betti[0], 0);  // No components
    }

    #[test]
    fn test_single_entity() {
        // Test hypergraph with single entity
    }

    #[test]
    fn test_large_hypergraph() {
        // Test scalability with large numbers of entities/edges
        // for size in [1000, 10000, 100000] {
        //     let substrate = build_large_hypergraph(size);
        //     // Verify operations complete in reasonable time
        // }
    }
}