//! Production readiness tests for SAL Kubernetes
//!
//! These tests verify that the module is ready for real-world production use.

#[cfg(test)]
mod production_tests {
    use sal_kubernetes::{KubernetesConfig, KubernetesManager};
    use std::time::Duration;

    /// Check if Kubernetes integration tests should run
    fn should_run_k8s_tests() -> bool {
        std::env::var("KUBERNETES_TEST_ENABLED").unwrap_or_default() == "1"
    }

    #[tokio::test]
    async fn test_production_configuration_profiles() {
        // Test all pre-configured profiles work
        let configs = vec![
            ("default", KubernetesConfig::default()),
            ("high_throughput", KubernetesConfig::high_throughput()),
            ("low_latency", KubernetesConfig::low_latency()),
            ("development", KubernetesConfig::development()),
        ];

        for (name, config) in configs {
            println!("Testing {} configuration profile", name);

            // Verify configuration values are reasonable
            assert!(
                config.operation_timeout >= Duration::from_secs(5),
                "{} timeout too short",
                name
            );
            assert!(
                config.operation_timeout <= Duration::from_secs(300),
                "{} timeout too long",
                name
            );
            assert!(config.max_retries <= 10, "{} too many retries", name);
            assert!(config.rate_limit_rps >= 1, "{} rate limit too low", name);
            assert!(
                config.rate_limit_burst >= config.rate_limit_rps,
                "{} burst should be >= RPS",
                name
            );

            println!("✓ {} configuration is valid", name);
        }
    }

    #[tokio::test]
    async fn test_real_cluster_operations() {
        if !should_run_k8s_tests() {
            println!("Skipping real cluster test. Set KUBERNETES_TEST_ENABLED=1 to enable.");
            return;
        }

        println!("🔍 Testing production operations with real cluster...");

        // Test with production-like configuration
        let config = KubernetesConfig::default()
            .with_timeout(Duration::from_secs(30))
            .with_retries(3, Duration::from_secs(1), Duration::from_secs(10))
            .with_rate_limit(5, 10); // Conservative for testing

        let km = KubernetesManager::with_config("default", config)
            .await
            .expect("Should connect to cluster");

        println!("✅ Connected to cluster successfully");

        // Test basic operations
        let namespaces = km.namespaces_list().await.expect("Should list namespaces");
        println!("✅ Listed {} namespaces", namespaces.len());

        let pods = km.pods_list().await.expect("Should list pods");
        println!("✅ Listed {} pods in default namespace", pods.len());

        let counts = km
            .resource_counts()
            .await
            .expect("Should get resource counts");
        println!("✅ Got resource counts for {} resource types", counts.len());

        // Test namespace operations
        let test_ns = "sal-production-test";
        km.namespace_create(test_ns)
            .await
            .expect("Should create test namespace");
        println!("✅ Created test namespace: {}", test_ns);

        let exists = km
            .namespace_exists(test_ns)
            .await
            .expect("Should check namespace existence");
        assert!(exists, "Test namespace should exist");
        println!("✅ Verified test namespace exists");

        println!("🎉 All production operations completed successfully!");
    }

    #[tokio::test]
    async fn test_error_handling_robustness() {
        if !should_run_k8s_tests() {
            println!("Skipping error handling test. Set KUBERNETES_TEST_ENABLED=1 to enable.");
            return;
        }

        println!("🔍 Testing error handling robustness...");

        let km = KubernetesManager::new("default")
            .await
            .expect("Should connect to cluster");

        // Test with invalid namespace name (should handle gracefully)
        let result = km.namespace_exists("").await;
        match result {
            Ok(_) => println!("✅ Empty namespace name handled"),
            Err(e) => println!("✅ Empty namespace name rejected: {}", e),
        }

        // Test with very long namespace name
        let long_name = "a".repeat(100);
        let result = km.namespace_exists(&long_name).await;
        match result {
            Ok(_) => println!("✅ Long namespace name handled"),
            Err(e) => println!("✅ Long namespace name rejected: {}", e),
        }

        println!("✅ Error handling is robust");
    }

    #[tokio::test]
    async fn test_concurrent_operations() {
        if !should_run_k8s_tests() {
            println!("Skipping concurrency test. Set KUBERNETES_TEST_ENABLED=1 to enable.");
            return;
        }

        println!("🔍 Testing concurrent operations...");

        let km = KubernetesManager::new("default")
            .await
            .expect("Should connect to cluster");

        // Test multiple concurrent operations
        let task1 = tokio::spawn({
            let km = km.clone();
            async move { km.pods_list().await }
        });
        let task2 = tokio::spawn({
            let km = km.clone();
            async move { km.services_list().await }
        });
        let task3 = tokio::spawn({
            let km = km.clone();
            async move { km.namespaces_list().await }
        });

        let mut success_count = 0;

        // Handle each task result
        match task1.await {
            Ok(Ok(_)) => {
                success_count += 1;
                println!("✅ Pods list operation succeeded");
            }
            Ok(Err(e)) => println!("⚠️ Pods list operation failed: {}", e),
            Err(e) => println!("⚠️ Pods task join failed: {}", e),
        }

        match task2.await {
            Ok(Ok(_)) => {
                success_count += 1;
                println!("✅ Services list operation succeeded");
            }
            Ok(Err(e)) => println!("⚠️ Services list operation failed: {}", e),
            Err(e) => println!("⚠️ Services task join failed: {}", e),
        }

        match task3.await {
            Ok(Ok(_)) => {
                success_count += 1;
                println!("✅ Namespaces list operation succeeded");
            }
            Ok(Err(e)) => println!("⚠️ Namespaces list operation failed: {}", e),
            Err(e) => println!("⚠️ Namespaces task join failed: {}", e),
        }

        assert!(
            success_count >= 2,
            "At least 2 concurrent operations should succeed"
        );
        println!(
            "✅ Concurrent operations handled well ({}/3 succeeded)",
            success_count
        );
    }

    #[test]
    fn test_security_and_validation() {
        println!("🔍 Testing security and validation...");

        // Test regex pattern validation
        let dangerous_patterns = vec![
            ".*",         // Too broad
            ".+",         // Too broad
            "",           // Empty
            "a{1000000}", // Potential ReDoS
        ];

        for pattern in dangerous_patterns {
            match regex::Regex::new(pattern) {
                Ok(_) => println!("⚠️ Pattern '{}' accepted (review if safe)", pattern),
                Err(_) => println!("✅ Pattern '{}' rejected", pattern),
            }
        }

        // Test safe patterns
        let safe_patterns = vec!["^test-.*$", "^app-[a-z0-9]+$", "^namespace-\\d+$"];

        for pattern in safe_patterns {
            match regex::Regex::new(pattern) {
                Ok(_) => println!("✅ Safe pattern '{}' accepted", pattern),
                Err(e) => println!("❌ Safe pattern '{}' rejected: {}", pattern, e),
            }
        }

        println!("✅ Security validation completed");
    }
}