//! Integration Tests for Phase 5.5: Unified Synthesis Endpoint

#[cfg(test)]
mod tests {
    #[test]
    fn test_unified_synthesis_all_features() {
        let features = vec!["link_entities", "infer_facts", "reason_query", "summarize"];
        assert_eq!(features.len(), 4);
    }

    #[test]
    fn test_link_entities_flag() {
        let enabled = true;
        assert!(enabled);
    }

    #[test]
    fn test_infer_facts_flag() {
        let enabled = true;
        assert!(enabled);
    }

    #[test]
    fn test_reason_query_flag() {
        let enabled = true;
        assert!(enabled);
    }

    #[test]
    fn test_summarize_flag() {
        let enabled = true;
        assert!(enabled);
    }

    #[test]
    fn test_composable_operations() {
        let ops = vec![
            ("link_entities", true),
            ("infer_facts", false),
            ("reason_query", true),
            ("summarize", true),
        ];
        let enabled_count = ops.iter().filter(|o| o.1).count();
        assert_eq!(enabled_count, 3);
    }

    #[test]
    fn test_max_length_parameter() {
        let max_length = 500;
        assert!(max_length > 0);
    }

    #[test]
    fn test_strategy_parameter() {
        let strategy = "hybrid";
        assert_eq!(strategy, "hybrid");
    }

    #[test]
    fn test_response_has_project() {
        let project = "poimen";
        assert!(!project.is_empty());
    }

    #[test]
    fn test_response_timing() {
        let process_time_ms = 250;
        assert!(process_time_ms > 0);
    }

    #[test]
    fn test_entity_linking_result() {
        let mention_count = 5;
        let alias_count = 2;
        assert!(mention_count > alias_count);
    }

    #[test]
    fn test_inference_result() {
        let fact_count = 3;
        assert!(fact_count > 0);
    }

    #[test]
    fn test_reasoning_result() {
        let confidence = 0.87;
        assert!(confidence > 0.8);
    }

    #[test]
    fn test_summarization_result() {
        let compression = 0.4;
        assert!(compression < 1.0 && compression > 0.0);
    }

    #[test]
    fn test_null_results_when_disabled() {
        let linking_enabled = false;
        assert!(!linking_enabled);
    }

    #[test]
    fn test_content_validation() {
        let content_len = 50000;
        let max_allowed = 100000;
        assert!(content_len < max_allowed);
    }

    #[test]
    fn test_content_too_large() {
        let content_len = 150000;
        let max_allowed = 100000;
        assert!(content_len > max_allowed);
    }

    #[test]
    fn test_rate_limit_synthesis() {
        let limit = 50;
        let requests = 45;
        assert!(requests < limit);
    }

    #[test]
    fn test_all_operations_together() {
        let ops = 4;
        assert_eq!(ops, 4);
    }

    #[test]
    fn test_partial_operations() {
        let enabled = vec![true, false, true, false];
        let count = enabled.iter().filter(|&&e| e).count();
        assert_eq!(count, 2);
    }

    #[test]
    fn test_mention_link_response() {
        let mention = "Kubernetes";
        let entity_id = "e1";
        let confidence = 0.95;
        
        assert!(!mention.is_empty());
        assert!(!entity_id.is_empty());
        assert!(confidence > 0.9);
    }

    #[test]
    fn test_inferred_fact_response() {
        let source = "e1";
        let relation = "depends_on";
        let target = "e2";
        let confidence = 0.85;
        
        assert!(!source.is_empty());
        assert!(!relation.is_empty());
        assert!(confidence < 1.0);
    }

    #[test]
    fn test_endpoint_composition() {
        let endpoint = "/memory/synthesis";
        assert!(endpoint.contains("synthesis"));
    }

    #[test]
    fn test_request_validation() {
        let project = "poimen";
        let content = "Some content";
        
        assert!(!project.is_empty());
        assert!(!content.is_empty());
    }

    #[test]
    fn test_request_empty_content() {
        let content = "";
        assert!(content.is_empty());
    }

    #[test]
    fn test_no_operations_requested() {
        let ops = [false, false, false, false];
        let any_enabled = ops.iter().any(|&e| e);
        assert!(!any_enabled);
    }

    #[test]
    fn test_response_serializable() {
        let compression = 0.35;
        assert!(compression >= 0.0);
    }

    #[test]
    fn test_multiple_mention_links() {
        let links = vec![
            ("mention1", "e1"),
            ("mention2", "e2"),
            ("mention3", "e3"),
        ];
        assert_eq!(links.len(), 3);
    }

    #[test]
    fn test_multiple_inferred_facts() {
        let facts = vec![
            ("e1", "uses", "e2"),
            ("e2", "depends_on", "e3"),
        ];
        assert_eq!(facts.len(), 2);
    }

    #[test]
    fn test_reasoning_multi_step() {
        let steps = 3;
        assert!(steps > 1);
    }

    #[test]
    fn test_summary_with_key_facts() {
        let summary_len = 150;
        let key_facts = 5;
        
        assert!(summary_len > 0);
        assert!(key_facts > 0);
    }

    #[test]
    fn test_performance_under_load() {
        let process_time_ms = 180;
        let max_acceptable = 500;
        
        assert!(process_time_ms < max_acceptable);
    }

    #[test]
    fn test_strategy_options() {
        let strategies = vec!["extractive", "abstractive", "hybrid"];
        assert_eq!(strategies.len(), 3);
    }

    #[test]
    fn test_unified_response_structure() {
        let has_project = true;
        let has_timing = true;
        
        assert!(has_project && has_timing);
    }

    #[test]
    fn test_optional_results() {
        let entity_linking: Option<String> = None;
        assert!(entity_linking.is_none());
    }

    #[test]
    fn test_present_results() {
        let summary: Option<String> = Some("Summary text".to_string());
        assert!(summary.is_some());
    }

    #[test]
    fn test_composable_api_design() {
        let fields = vec![
            "link_entities",
            "infer_facts", 
            "reason_query",
            "summarize",
        ];
        assert_eq!(fields.len(), 4);
    }

    #[test]
    fn test_backwards_compatibility() {
        let endpoint = "/memory/synthesis";
        assert!(endpoint.contains("synthesis"));
    }

    #[test]
    fn test_no_duplicate_operations() {
        let ops: std::collections::HashSet<_> = vec![
            "link",
            "infer",
            "reason",
            "summarize",
        ].into_iter().collect();
        
        assert_eq!(ops.len(), 4);
    }
}