/// API middleware for authentication and authorization
use axum::{
    extract::{Request, State},
    http::HeaderMap,
    middleware::Next,
    response::Response,
};
use std::sync::Arc;
use tracing::{error, warn};

use crate::auth::extract_bearer_token;
use crate::core::VaultCore;

/// Authentication middleware that validates Bearer tokens
pub async fn auth_middleware(
    State(vault): State<Arc<VaultCore>>,
    headers: HeaderMap,
    request: Request,
    next: Next,
) -> Response {
    // System health endpoints don't require authentication
    if request.uri().path().starts_with("/v1/sys/health")
        || request.uri().path().starts_with("/v1/sys/status")
        || request.uri().path().starts_with("/v1/sys/init")
    {
        return next.run(request).await;
    }

    // Check for bearer token
    match extract_bearer_token(&headers) {
        Some(token) => {
            // Validate token
            match vault.token_manager.validate(&token).await {
                Ok(true) => {
                    // Token is valid, continue to next handler
                    next.run(request).await
                }
                Ok(false) => {
                    warn!("Invalid or expired token");
                    Response::builder()
                        .status(axum::http::StatusCode::UNAUTHORIZED)
                        .body(axum::body::Body::from("Invalid or expired token"))
                        .unwrap()
                }
                Err(e) => {
                    error!("Token validation error: {}", e);
                    Response::builder()
                        .status(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
                        .body(axum::body::Body::from("Token validation failed"))
                        .unwrap()
                }
            }
        }
        None => {
            warn!("Missing Authorization header");
            Response::builder()
                .status(axum::http::StatusCode::UNAUTHORIZED)
                .body(axum::body::Body::from(
                    "Missing or invalid Authorization header",
                ))
                .unwrap()
        }
    }
}

/// Request logging middleware
pub async fn logging_middleware(request: Request, next: Next) -> Response {
    let method = request.method().clone();
    let uri = request.uri().clone();

    tracing::debug!("Request: {} {}", method, uri);

    let response = next.run(request).await;

    tracing::debug!("Response: {}", response.status());

    response
}

#[cfg(test)]
mod tests {
    #[test]
    fn test_system_health_path() {
        let path = "/v1/sys/health";
        assert!(path.starts_with("/v1/sys/health"));
    }

    #[test]
    fn test_system_status_path() {
        let path = "/v1/sys/status";
        assert!(path.starts_with("/v1/sys/status"));
    }
}