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::collections::HashMap;
use std::env;
use std::net::ToSocketAddrs;
use std::str::FromStr;
use tokio::{select, signal};
use tonic::transport::Server;
use tracing::log::debug;
use tracing::{info, Level};
use utils::consul_registration;
use utils::service_discovery::get_service_address;
use warp::Filter;

#[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("LISTEN_ADDR").unwrap_or_else(|_| "127.0.0.1".to_string());
    let port = env::var("AUTH_SERVICE_PORT").unwrap_or_else(|_| "50051".to_string());
    let health_port = env::var("HEALTH_CHECK_PORT").unwrap_or_else(|_| "8081".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 = env::var("AUTH_SERVICE_ADDR").unwrap_or_else(|_| "127.0.0.1".to_string());
    let service_port = port.clone();
    let health_check_url = format!("http://{}:{}/health", service_address, health_port);
    let health_check_endpoint_addr = format!("{}:{}", service_address, health_port);
    let db_nodes = get_service_address(&consul_url, "database-service").await?;

    // Register service with Consul
    let service_id = consul_registration::generate_service_id();
    let tags = vec!["version-1.0".to_string()];
    let mut meta = HashMap::new();
    consul_registration::register_service(
        &consul_url,
        service_id.as_str(),
        service_name.as_str(),
        service_address.as_str(),
        service_port.parse().unwrap_or(50052),
        tags,
        meta,
        &health_check_url,
    )
        .await?;

    // Start health-check endpoint
    consul_registration::start_health_check(addr.as_str()).await?;

    let db_address = db_nodes.get(0).unwrap();
    let db_url = format!("http://{}:{}", db_address.ServiceAddress, db_address.ServicePort);
    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_id.as_str()).await.expect("");
    info!("service {} deregistered", service_name);
    Ok(())
}