use crate::axum_gateway::auth::auth_service_client::AuthServiceClient;
use dotenv::dotenv;
use std::collections::HashMap;
use std::env;
use std::str::FromStr;
use std::sync::Arc;
use tokio::sync::Mutex;
use tokio::{select, signal};
use tracing::{info, Level};
use utils::consul_registration;
use utils::service_discovery::get_service_address;

mod axum_gateway;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    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(|_| "0.0.0.0".to_string());
    let port = env::var("API_SERVICE_PORT").unwrap_or_else(|_| "8080".to_string());
    let health_port = env::var("HEALTH_CHECK_PORT").unwrap_or_else(|_| "8079".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(|_| "api-service".to_string());
    let service_address = env::var("API_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);

    // Register service with Consul
    let service_id = consul_registration::get_or_generate_service_id(env!("CARGO_PKG_NAME"));
    let tags = vec!["version-1.0".to_string()];
    let 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(8080),
        tags,
        meta,
        &health_check_url,
    )
    .await?;

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

    let auth_node = get_service_address(&consul_url, "auth-service").await?;
    let auth_address = auth_node.get(0).unwrap();
    let auth_service_address = format!(
        "http://{}:{}",
        auth_address.ServiceAddress, auth_address.ServicePort
    );

    // Connect to the gRPC auth-service
    let grpc_client = AuthServiceClient::connect(auth_service_address.to_string()).await?;
    let grpc_client = Arc::new(Mutex::new(grpc_client));

    // Start the Axum REST API
    info!("Starting REST API on {}:{}", addr, port);
    tokio::spawn(axum_gateway::serve_rest_api(grpc_client));

    let mut sigterm_stream = signal::unix::signal(signal::unix::SignalKind::terminate())?;
    select! {
        _ = signal::ctrl_c() => {
            info!("Received SIGINT (Ctrl+C), shutting down...");
        },
        _ = sigterm_stream.recv() => {
            info!("Received SIGTERM, shutting down...");
        },
    }

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