use database_service::db::Database;
use database_service::grpc::character_db_service_server::CharacterDbServiceServer;
use database_service::grpc::database_service::MyDatabaseService;
use database_service::grpc::user_service_server::UserServiceServer;
use dotenv::dotenv;
use sqlx::postgres::PgPoolOptions;
use std::collections::HashMap;
use std::env;
use std::str::FromStr;
use std::sync::Arc;
use tokio::sync::Mutex;
use tonic::transport::Server;
use tracing::{info, Level};
use utils::consul_registration;
use utils::redis_cache::RedisCache;

#[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();

    let addr = env::var("LISTEN_ADDR").unwrap_or_else(|_| "0.0.0.0".to_string());
    let port = env::var("DATABASE_SERVICE_PORT").unwrap_or_else(|_| "50052".to_string());

    let database_url = std::env::var("DATABASE_URL").expect("DATABASE_URL must be set");
    let redis_url =
        std::env::var("REDIS_URL").unwrap_or_else(|_| "redis://127.0.0.1:6379".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(|_| "database-service".to_string());
    let service_address =
        env::var("DATABASE_SERVICE_ADDR").unwrap_or_else(|_| "127.0.0.1".to_string());
    let service_port = port.clone();

    // Register service with Consul
    let service_id = consul_registration::get_or_generate_service_id(env!("CARGO_PKG_NAME"));
    let version = env!("CARGO_PKG_VERSION").to_string();
    let tags = vec![version, "grpc".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(50052),
        tags,
        meta,
        None,
        None,
    )
        .await?;

    consul_registration::start_health_check(addr.as_str()).await?;

    let full_addr = format!("{}:{}", &addr, port);
    let address = full_addr.parse().expect("Invalid address");
    let pool = PgPoolOptions::new()
        .max_connections(5)
        .connect(&database_url)
        .await
        .expect("Failed to create PostgreSQL connection pool");

    let redis_cache = Arc::new(Mutex::new(RedisCache::new(&redis_url)));
    let db = Arc::new(Database::new(pool, redis_cache));
    let my_service = MyDatabaseService { db };

    let (mut health_reporter, health_service) = tonic_health::server::health_reporter();
    health_reporter.set_serving::<UserServiceServer<MyDatabaseService>>().await;

    // Pass `shared_cache` into services as needed
    info!("Database Service running on {}", address);
    tokio::spawn(
        Server::builder()
            .add_service(health_service)
            .add_service(UserServiceServer::new(my_service.clone()))
            .add_service(CharacterDbServiceServer::new(my_service))
            .serve(address),
    );

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