#![allow(unused_imports)]
#![allow(unused_variables)]
#![allow(dead_code)]

use serde_json;



    use async_trait::async_trait;
    use serde_json::json;
    use std::sync::Arc;
    use tokio::sync::mpsc;


    struct MockLLMProvider {
        response: String,
        call_count: std::sync::atomic::AtomicUsize,
    }

    impl MockLLMProvider {
        fn new(response: &str) -> Self {
            Self {
                response: response.to_string(),
                call_count: std::sync::atomic::AtomicUsize::new(0),
            }
        }

        fn get_call_count(&self) -> usize {
            self.call_count.load(std::sync::atomic::Ordering::SeqCst)
        }
    }

    #[async_trait]
    impl LLMProvider for MockLLMProvider {
        async fn generate(
            &self,
            _prompt: &str,
            _messages: &serde_json::Value,
            _model: &str,
            _key: &str,
        ) -> Result<String, Box<dyn std::error::Error + Send + Sync>> {
            self.call_count
                .fetch_add(1, std::sync::atomic::Ordering::SeqCst);
            Ok(self.response.clone())
        }

        async fn generate_stream(
            &self,
            _prompt: &str,
            _messages: &serde_json::Value,
            tx: mpsc::Sender<String>,
            _model: &str,
            _key: &str,
        ) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
            self.call_count
                .fetch_add(1, std::sync::atomic::Ordering::SeqCst);
            let _ = tx.send(self.response.clone()).await;
            Ok(())
        }

        async fn cancel_job(
            &self,
            _session_id: &str,
        ) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
            Ok(())
        }
    }


    struct MockEmbeddingService;

    #[async_trait]
    impl EmbeddingService for MockEmbeddingService {
        async fn get_embedding(
            &self,
            text: &str,
        ) -> Result<Vec<f32>, Box<dyn std::error::Error + Send + Sync>> {

            let hash = text.bytes().fold(0u32, |acc, b| acc.wrapping_add(b as u32));
            Ok(vec![hash as f32 / 255.0; 10])
        }

        async fn compute_similarity(&self, embedding1: &[f32], embedding2: &[f32]) -> f32 {
            if embedding1.len() != embedding2.len() {
                return 0.0;
            }


            let diff: f32 = embedding1
                .iter()
                .zip(embedding2.iter())
                .map(|(a, b)| (a - b).abs())
                .sum();

            1.0 - (diff / embedding1.len() as f32).min(1.0)
        }
    }

    #[tokio::test]
    async fn test_exact_cache_hit() {

        let mock_provider = Arc::new(MockLLMProvider::new("Test response"));
        let cache_client = Arc::new(redis::Client::open("redis://127.0.0.1/").unwrap());

        let config = CacheConfig {
            ttl: 60,
            semantic_matching: false,
            similarity_threshold: 0.95,
            max_similarity_checks: 10,
            key_prefix: "test_cache".to_string(),
        };

        let cached_provider =
            CachedLLMProvider::new(mock_provider.clone(), cache_client, config, None);

        let prompt = "What is the weather?";
        let messages = json!([{"role": "user", "content": prompt}]);
        let model = "test-model";
        let key = "test-key";


        let result1 = cached_provider
            .generate(prompt, &messages, model, key)
            .await
            .unwrap();
        assert_eq!(result1, "Test response");
        assert_eq!(mock_provider.get_call_count(), 1);


        let result2 = cached_provider
            .generate(prompt, &messages, model, key)
            .await
            .unwrap();
        assert_eq!(result2, "Test response");
        assert_eq!(mock_provider.get_call_count(), 1);
    }

    #[tokio::test]
    async fn test_semantic_cache_hit() {

        let mock_provider = Arc::new(MockLLMProvider::new("Weather is sunny"));
        let cache_client = Arc::new(redis::Client::open("redis://127.0.0.1/").unwrap());

        let config = CacheConfig {
            ttl: 60,
            semantic_matching: true,
            similarity_threshold: 0.8,
            max_similarity_checks: 10,
            key_prefix: "test_semantic".to_string(),
        };

        let embedding_service = Arc::new(MockEmbeddingService);
        let cached_provider = CachedLLMProvider::new(
            mock_provider.clone(),
            cache_client,
            config,
            Some(embedding_service),
        );

        let messages = json!([{"role": "user", "content": "test"}]);
        let model = "test-model";
        let key = "test-key";


        let result1 = cached_provider
            .generate("What's the weather?", &messages, model, key)
            .await
            .unwrap();
        assert_eq!(result1, "Weather is sunny");
        assert_eq!(mock_provider.get_call_count(), 1);


        let result2 = cached_provider
            .generate("What is the weather?", &messages, model, key)
            .await
            .unwrap();




        assert_eq!(result2, "Weather is sunny");
        assert_eq!(mock_provider.get_call_count(), 2);
    }

    #[tokio::test]
    async fn test_cache_miss_different_model() {

        let mock_provider = Arc::new(MockLLMProvider::new("Response"));
        let cache_client = Arc::new(redis::Client::open("redis://127.0.0.1/").unwrap());

        let config = CacheConfig::default();
        let cached_provider =
            CachedLLMProvider::new(mock_provider.clone(), cache_client, config, None);

        let prompt = "Same prompt";
        let messages = json!([{"role": "user", "content": prompt}]);
        let key = "test-key";


        let _ = cached_provider
            .generate(prompt, &messages, "model1", key)
            .await
            .unwrap();
        assert_eq!(mock_provider.get_call_count(), 1);


        let _ = cached_provider
            .generate(prompt, &messages, "model2", key)
            .await
            .unwrap();
        assert_eq!(mock_provider.get_call_count(), 2);
    }

    #[tokio::test]
    async fn test_cache_statistics() {

        let mock_provider = Arc::new(MockLLMProvider::new("Response"));
        let cache_client = Arc::new(redis::Client::open("redis://127.0.0.1/").unwrap());

        let config = CacheConfig {
            ttl: 60,
            semantic_matching: false,
            similarity_threshold: 0.95,
            max_similarity_checks: 10,
            key_prefix: "test_stats".to_string(),
        };

        let cached_provider = CachedLLMProvider::new(mock_provider, cache_client, config, None);


        let _ = cached_provider.clear_cache(None).await;


        let messages = json!([]);
        for i in 0..5 {
            let _ = cached_provider
                .generate(&format!("prompt_{}", i), &messages, "model", "key")
                .await;
        }


        for i in 0..3 {
            let _ = cached_provider
                .generate(&format!("prompt_{}", i), &messages, "model", "key")
                .await;
        }


        let stats = cached_provider.get_cache_stats().await.unwrap();
        assert_eq!(stats.total_entries, 5);
        assert_eq!(stats.total_hits, 3);
        assert!(stats.total_size_bytes > 0);
        assert_eq!(stats.model_distribution.get("model"), Some(&5));
    }

    #[tokio::test]
    async fn test_stream_generation_with_cache() {

        let mock_provider = Arc::new(MockLLMProvider::new("Streamed response"));
        let cache_client = Arc::new(redis::Client::open("redis://127.0.0.1/").unwrap());

        let config = CacheConfig {
            ttl: 60,
            semantic_matching: false,
            similarity_threshold: 0.95,
            max_similarity_checks: 10,
            key_prefix: "test_stream".to_string(),
        };

        let cached_provider =
            CachedLLMProvider::new(mock_provider.clone(), cache_client, config, None);

        let prompt = "Stream this";
        let messages = json!([{"role": "user", "content": prompt}]);
        let model = "test-model";
        let key = "test-key";


        let (tx1, mut rx1) = mpsc::channel(100);
        cached_provider
            .generate_stream(prompt, &messages, tx1, model, key)
            .await
            .unwrap();

        let mut result1 = String::new();
        while let Some(chunk) = rx1.recv().await {
            result1.push_str(&chunk);
        }
        assert_eq!(result1, "Streamed response");
        assert_eq!(mock_provider.get_call_count(), 1);


        let (tx2, mut rx2) = mpsc::channel(100);
        cached_provider
            .generate_stream(prompt, &messages, tx2, model, key)
            .await
            .unwrap();

        let mut result2 = String::new();
        while let Some(chunk) = rx2.recv().await {
            result2.push_str(&chunk);
        }
        assert!(result2.contains("Streamed response"));
        assert_eq!(mock_provider.get_call_count(), 1);
    }

    #[test]


    fn test_cosine_similarity_calculation() {
        let service = LocalEmbeddingService::new(
            "http://localhost:8082".to_string(),
            "test-model".to_string(),
        );


        let vec1 = vec![0.5, 0.5, 0.5];
        let vec2 = vec![0.5, 0.5, 0.5];
        let similarity = tokio::runtime::Runtime::new()
            .unwrap()
            .block_on(service.compute_similarity(&vec1, &vec2));
        assert_eq!(similarity, 1.0);


        let vec3 = vec![1.0, 0.0];
        let vec4 = vec![0.0, 1.0];
        let similarity = tokio::runtime::Runtime::new()
            .unwrap()
            .block_on(service.compute_similarity(&vec3, &vec4));
        assert_eq!(similarity, 0.0);


        let vec5 = vec![1.0, 1.0];
        let vec6 = vec![-1.0, -1.0];
        let similarity = tokio::runtime::Runtime::new()
            .unwrap()
            .block_on(service.compute_similarity(&vec5, &vec6));
        assert_eq!(similarity, -1.0);
    }