use crate::service_discovery::get_service_address;
use auth_service::auth::auth_service_server::AuthServiceServer;
use auth_service::database_client::DatabaseClient;
use auth_service::database_client::DatabaseClientTrait;
use auth_service::grpc::MyAuthService;
use dotenv::dotenv;
use std::env;
use std::net::ToSocketAddrs;
use std::str::FromStr;
use tokio::{select, signal};
use tonic::transport::Server;
use tracing::{info, Level};
use warp::Filter;

mod consul_registration;
mod service_discovery;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Load environment variables from .env
    dotenv().ok();

    tracing_subscriber::fmt()
        .with_max_level(Level::from_str(&env::var("LOG_LEVEL").unwrap_or_else(|_| "info".to_string())).unwrap_or_else(|_| Level::INFO))
        .init();

    // Set the gRPC server address
    let addr = env::var("AUTH_SERVICE_ADDR").unwrap_or_else(|_| "127.0.0.1".to_string());
    let port = env::var("AUTH_SERVICE_PORT").unwrap_or_else(|_| "50051".to_string());

    let consul_url = env::var("CONSUL_URL").unwrap_or_else(|_| "http://127.0.0.1:8500".to_string());
    let service_name = env::var("SERVICE_NAME").unwrap_or_else(|_| "auth-service".to_string());
    let service_address = addr.as_str();
    let service_port = port.clone();
    let health_check_url = format!("http://{}:{}/health", service_address, service_port);
    let health_check_endpoint_addr = format!("{}:8081", service_address);
    let db_address = get_service_address(&consul_url, "database-service").await?;

    // Register service with Consul
    consul_registration::register_service(
        &consul_url,
        service_name.as_str(),
        service_address,
        service_port.parse().unwrap_or(50052),
        &health_check_url,
    )
        .await?;

    // Start health-check endpoint
    let health_route = warp::path!("health")
        .map(|| warp::reply::with_status("OK", warp::http::StatusCode::OK));

    tokio::spawn(warp::serve(health_route).run(health_check_endpoint_addr.to_socket_addrs()?.next().unwrap()));

    let db_url = format!("http://{}:{}", db_address.Address, db_address.Port);
    let database_client = DatabaseClient::connect(&db_url).await?;

    let full_addr = format!("{}:{}", &addr, port);
    let address = full_addr.parse().expect("Invalid address");
    let auth_service = MyAuthService {
        db_client: database_client,
    };

    println!("Authentication Service running on {}", addr);

    // Start the gRPC server
    tokio::spawn(Server::builder()
        .add_service(AuthServiceServer::new(auth_service))
        .serve(address));
    
    select! {
        _ = signal::ctrl_c() => {},
    }

    consul_registration::deregister_service(&consul_url, service_name.as_str()).await.expect("");
    info!("service {} deregistered", service_name);
    Ok(())
}