// Integration tests for LLM Proxy Gateway

use llm_proxy::config::Config;
use llm_proxy::database::Database;
use llm_proxy::state::AppState;
use llm_proxy::rate_limiting::RateLimitManager;
use tempfile::TempDir;
use std::fs;

#[tokio::test]
async fn test_config_loading() {
    // Create a temporary config file
    let temp_dir = TempDir::new().unwrap();
    let config_path = temp_dir.path().join("config.toml");
    
    let config_content = r#"
[server]
port = 8080
host = "0.0.0.0"

[database]
path = "./data/test.db"
max_connections = 5

[providers.openai]
enabled = true
base_url = "https://api.openai.com/v1"

[providers.gemini]
enabled = true
base_url = "https://generativelanguage.googleapis.com/v1"

[providers.deepseek]
enabled = true
base_url = "https://api.deepseek.com"

[providers.grok]
enabled = false
base_url = "https://api.x.ai/v1"

[model_mapping]
"gpt-*" = "openai"
"gemini-*" = "gemini"
"deepseek-*" = "deepseek"
"grok-*" = "grok"

[pricing]
openai = { input = 0.01, output = 0.03 }
gemini = { input = 0.0005, output = 0.0015 }
deepseek = { input = 0.00014, output = 0.00028 }
grok = { input = 0.001, output = 0.003 }
"#;
    
    fs::write(&config_path, config_content).unwrap();
    
    // Test loading config
    let config = Config::load_from_path(&config_path);
    assert!(config.is_ok());
    
    let config = config.unwrap();
    assert_eq!(config.server.port, 8080);
    assert!(config.providers.openai.is_some());
    assert!(config.providers.grok.is_none());
}

#[tokio::test]
async fn test_database_initialization() {
    // Create a temporary database file
    let temp_dir = TempDir::new().unwrap();
    let db_path = temp_dir.path().join("test.db");
    
    // Test database initialization
    let database = Database::new(&db_path).await;
    assert!(database.is_ok());
    
    let database = database.unwrap();
    
    // Test connection
    let test_result = database.test_connection().await;
    assert!(test_result.is_ok());
}

#[tokio::test]
async fn test_provider_manager() {
    // Create a provider manager
    use llm_proxy::providers::{ProviderManager, Provider};
    use llm_proxy::config::OpenAIConfig;
    
    let mut manager = ProviderManager::new();
    assert_eq!(manager.providers.len(), 0);
    
    // Test adding providers (we can't actually add real providers without API keys)
    // This test just verifies the manager structure works
    assert!(manager.get_provider_for_model("gpt-4").is_none());
    assert!(manager.get_provider("openai").is_none());
}

#[tokio::test]
async fn test_rate_limit_manager() {
    let manager = RateLimitManager::new(60, 10);
    
    // Test client rate limiting
    let allowed = manager.check_request("test-client").await;
    assert!(allowed); // First request should be allowed
    
    // Test provider circuit breaker
    let allowed = manager.check_provider("openai").await;
    assert!(allowed); // Circuit should be closed initially
    
    // Record some failures
    manager.record_provider_failure("openai").await;
    manager.record_provider_failure("openai").await;
    manager.record_provider_failure("openai").await;
    manager.record_provider_failure("openai").await;
    manager.record_provider_failure("openai").await;
    
    // After 5 failures, circuit should be open
    let allowed = manager.check_provider("openai").await;
    assert!(!allowed); // Circuit should be open
    
    // Record success to close circuit
    manager.record_provider_success("openai").await;
    manager.record_provider_success("openai").await;
    manager.record_provider_success("openai").await;
    
    // After 3 successes in half-open state, circuit should be closed
    let allowed = manager.check_provider("openai").await;
    assert!(allowed); // Circuit should be closed again
}

#[tokio::test]
async fn test_app_state_creation() {
    // Create a temporary database
    let temp_dir = TempDir::new().unwrap();
    let db_path = temp_dir.path().join("test.db");
    
    let database = Database::new(&db_path).await.unwrap();
    
    // Test AppState creation using test utilities
    use llm_proxy::test_utils::create_test_state;
    let state = create_test_state().await;
    
    // Verify state components are initialized
    assert!(state.database.test_connection().await.is_ok());
}

#[tokio::test]
async fn test_multimodal_image_converter() {
    use llm_proxy::multimodal::{ImageConverter, ImageInput};
    
    // Test model detection
    assert!(ImageConverter::model_supports_multimodal("gpt-4-vision-preview"));
    assert!(ImageConverter::model_supports_multimodal("gemini-pro-vision"));
    assert!(!ImageConverter::model_supports_multimodal("gpt-3.5-turbo"));
    assert!(!ImageConverter::model_supports_multimodal("gemini-pro"));
    
    // Test data URL parsing (utility function)
    let test_url = "data:image/jpeg;base64,SGVsbG8gV29ybGQ=";
    let parts: Vec<&str> = test_url[5..].split(";base64,").collect();
    assert_eq!(parts.len(), 2);
    assert_eq!(parts[0], "image/jpeg");
    assert_eq!(parts[1], "SGVsbG8gV29ybGQ=");
}

#[tokio::test]
async fn test_error_conversions() {
    use llm_proxy::errors::AppError;
    use anyhow::anyhow;
    
    // Test anyhow error conversion
    let anyhow_error = anyhow!("Test error");
    let app_error: AppError = anyhow_error.into();
    
    match app_error {
        AppError::InternalError(msg) => assert_eq!(msg, "Test error"),
        _ => panic!("Expected InternalError"),
    }
    
    // Test sqlx error conversion
    use sqlx::Error as SqlxError;
    let sqlx_error = SqlxError::PoolClosed;
    let app_error: AppError = sqlx_error.into();
    
    match app_error {
        AppError::DatabaseError(msg) => assert!(msg.contains("pool closed")),
        _ => panic!("Expected DatabaseError"),
    }
}