//! Integration tests for the Servme HTTP framework.
//!
//! These tests verify the end-to-end functionality of the server
//! including middleware chains and request handling.

use http_body_util::Full;
use hyper::{body::Bytes, Request, Response};
use servme::{
    Responder, Server, ServerBuilder, ServerConfig, ServerError, UrlExtract,
    middleware::{Claims, Middleware, MiddlewareFuture, MiddlewareResult},
};
use std::net::IpAddr;
use tokio::time::{timeout, Duration};

// Helper to create a simple in-memory test
mod helpers {
    use super::*;

    /// A simple middleware that adds a custom header
    pub struct TestMiddleware;

    impl TestMiddleware {
        pub fn new() -> Self {
            Self
        }
    }

    impl Middleware for TestMiddleware {
        fn run(&self, req: Request<Incoming>) -> MiddlewareFuture<'_> {
            Box::pin(async move {
                MiddlewareResult::Continue(req)
            })
        }
    }

    use http::Request;
    use hyper::body::Incoming;
}

// ============================================================================
// Server Configuration Tests
// ============================================================================

#[test]
fn test_server_builder_default_config() {
    let builder = ServerBuilder::new();

    // Verify default values
    assert_eq!(builder.config.ip, "127.0.0.1");
    assert_eq!(builder.config.port, 8080);
    assert!(builder.middlewares.is_empty());
    assert!(builder.data.is_none());
}

#[test]
fn test_server_builder_with_address() {
    let builder = ServerBuilder::new()
        .address("0.0.0.0", 3000);

    assert_eq!(builder.config.ip, "0.0.0.0");
    assert_eq!(builder.config.port, 3000);
}

#[test]
fn test_server_builder_chaining() {
    let server = ServerBuilder::new()
        .address("127.0.0.1", 8080)
        .add_api_key_middleware("test-key")
        .build();

    assert_eq!(server.config.ip, "127.0.0.1");
    assert_eq!(server.config.port, 8080);
    assert_eq!(server.middlewares.len(), 1);
}

#[test]
fn test_server_config_default() {
    let config = ServerConfig::default();
    assert_eq!(config.ip, "127.0.0.1");
    assert_eq!(config.port, 8080);
}

// ============================================================================
// Responder Tests
// ============================================================================

#[test]
fn test_responder_ok() {
    let result = Responder::ok("Hello");
    assert!(result.is_ok());

    let response = result.unwrap();
    assert_eq!(response.status(), http::StatusCode::OK);
}

#[test]
fn test_responder_json() {
    #[derive(serde::Serialize)]
    struct TestData {
        name: String,
        value: i32,
    }

    let data = TestData {
        name: "test".to_string(),
        value: 42,
    };

    let result = Responder::json(&data);
    assert!(result.is_ok());

    let response = result.unwrap();
    assert_eq!(response.status(), http::StatusCode::OK);
    assert_eq!(
        response.headers().get("content-type").unwrap(),
        "application/json"
    );
}

#[test]
fn test_responder_redirect() {
    let result = Responder::redirect("/new-location");
    assert!(result.is_ok());

    let response = result.unwrap();
    assert_eq!(response.status(), http::StatusCode::SEE_OTHER);
    assert_eq!(
        response.headers().get("location").unwrap(),
        "/new-location"
    );
}

#[test]
fn test_responder_redirect_empty_fails() {
    let result = Responder::redirect("");
    assert!(result.is_err());
}

#[test]
fn test_responder_status_codes() {
    assert!(Responder::not_found().is_ok());
    assert!(Responder::unauthorized().is_ok());
    assert!(Responder::forbidden().is_ok());
    assert!(Responder::bad_request("bad").is_ok());
    assert!(Responder::no_content().is_ok());
    assert!(Responder::internal_error("error").is_ok());

    let response = Responder::not_found().unwrap();
    assert_eq!(response.status(), http::StatusCode::NOT_FOUND);

    let response = Responder::unauthorized().unwrap();
    assert_eq!(response.status(), http::StatusCode::UNAUTHORIZED);
}

// ============================================================================
// Middleware Tests
// ============================================================================

#[test]
fn test_api_key_middleware_creation() {
    use servme::middleware::ApiKeyMiddleware;

    let middleware = ApiKeyMiddleware::new("test-key");
    assert_eq!(middleware.api_key, "test-key");
}

#[test]
fn test_ip_filter_middleware_validation() {
    use servme::middleware::IpFilterMiddleware;

    // Valid IPs should work
    let result = IpFilterMiddleware::new(vec![], false);
    assert!(result.is_ok());

    let result = IpFilterMiddleware::new(
        vec!["192.168.1.1".to_string(), "10.0.0.1".to_string()],
        false
    );
    assert!(result.is_ok());

    // Invalid IP should fail
    let result = IpFilterMiddleware::new(
        vec!["not-an-ip".to_string()],
        false
    );
    assert!(result.is_err());
}

#[test]
fn test_ip_filter_authorization() {
    use servme::middleware::IpFilterMiddleware;

    // Test with unchecked for simpler testing
    let middleware = IpFilterMiddleware::new_unchecked(
        vec!["192.168.1.100".to_string()],
        false
    );

    let allowed_ip: IpAddr = "192.168.1.100".parse().unwrap();
    let denied_ip: IpAddr = "192.168.1.200".parse().unwrap();

    assert!(middleware.is_authorized(&allowed_ip));
    assert!(!middleware.is_authorized(&denied_ip));
}

#[test]
fn test_ip_filter_ipv6() {
    use servme::middleware::IpFilterMiddleware;

    let middleware = IpFilterMiddleware::new_unchecked(
        vec!["::1".to_string()],
        false,
    );

    let ipv6_local: IpAddr = "::1".parse().unwrap();
    let ipv6_other: IpAddr = "::2".parse().unwrap();

    assert!(middleware.is_authorized(&ipv6_local));
    assert!(!middleware.is_authorized(&ipv6_other));
}

// ============================================================================
// URL Extract Tests
// ============================================================================

#[test]
fn test_url_extract_params() {
    use http::Uri;

    let uri: Uri = "/api?name=test&value=42".parse().unwrap();
    let extractor = UrlExtract::new(&uri);

    assert_eq!(extractor.param_str("name"), Some("test".to_string()));
    assert_eq!(extractor.param_i64("value"), Some(42));
}

#[test]
fn test_url_extract_missing_param() {
    use http::Uri;

    let uri: Uri = "/api".parse().unwrap();
    let extractor = UrlExtract::new(&uri);

    assert_eq!(extractor.param_str("missing"), None);
}

// ============================================================================
// Claims Tests
// ============================================================================

#[test]
fn test_claims_is_expired() {
    use servme::middleware::auth_types::Claims;

    let claims = Claims {
        sub: "user123".to_string(),
        exp: 1000, // Very old timestamp
    };

    assert!(claims.is_expired(2000)); // Current time > exp
    assert!(!claims.is_expired(500)); // Current time < exp
}

#[test]
fn test_claims_username() {
    use servme::middleware::auth_types::Claims;

    let claims = Claims {
        sub: "testuser".to_string(),
        exp: 9999999999,
    };

    assert_eq!(claims.username(), "testuser");
}

// ============================================================================
// Error Handling Tests
// ============================================================================

#[test]
fn test_server_error_display() {
    let error = ServerError::bind("127.0.0.1:8080", std::io::Error::new(
        std::io::ErrorKind::AddrInUse,
        "Address already in use"
    ));

    let display = format!("{}", error);
    assert!(display.contains("Failed to bind"));
    assert!(display.contains("127.0.0.1:8080"));
}

#[test]
fn test_server_error_validation() {
    let error = ServerError::validation("field", "must not be empty");

    let display = format!("{}", error);
    assert!(display.contains("Validation failed"));
    assert!(display.contains("field"));
}

// ============================================================================
// Constants Tests
// ============================================================================

#[test]
fn test_constants_values() {
    use servme::constants::*;

    assert_eq!(DEFAULT_HOST, "127.0.0.1");
    assert_eq!(DEFAULT_PORT, 8080);
    assert_eq!(JWT_COOKIE_NAME, "access_token");
    assert_eq!(BEARER_PREFIX, "Bearer ");
    assert!(FILE_EXTENSIONS.contains(&".json"));
    assert!(FILE_EXTENSIONS.contains(&".html"));
}