use axum::{
    routing::get,
    Router,
    Json,
};
use std::sync::Arc;
use tower_http::cors::{CorsLayer, Any};
use tracing_subscriber;

mod blockchain;
mod auth;
mod middleware;
mod error;
mod config;
mod models;
mod wallet;
mod exchange;

use blockchain::NacClient;
use config::Config;
use models::HealthResponse;

#[tokio::main]
async fn main() {
    // 初始化日志
    tracing_subscriber::fmt::init();
    
    // 加载配置
    let config = Config::from_file("config.toml")
        .unwrap_or_else(|_| {
            tracing::warn!("无法加载配置文件，使用默认配置");
            let default_config = Config::default();
            // 保存默认配置到文件
            let _ = default_config.save_to_file("config.toml");
            default_config
        });
    
    // 创建区块链客户端
    let nac_client = Arc::new(NacClient::new(config.blockchain.rpc_url.clone()));
    
    // 创建路由
    let app = Router::new()
        .route("/", get(root))
        .route("/health", get(health_check))
        // 钱包API
        .nest("/api/wallet", wallet::routes(nac_client.clone()))
        // 交易所API
        .nest("/api/exchange", exchange::routes(nac_client.clone()))
        // 中间件
        .layer(axum::middleware::from_fn(middleware::logging_middleware))
        .layer(axum::middleware::from_fn(middleware::request_id_middleware))
        // CORS配置
        .layer(
            CorsLayer::new()
                .allow_origin(Any)
                .allow_methods(Any)
                .allow_headers(Any)
        );
    
    // 启动服务器
    let addr = format!("{}:{}", config.server.host, config.server.port);
    tracing::info!("🚀 NAC API服务器启动在 http://{}", addr);
    tracing::info!("📡 区块链RPC: {}", config.blockchain.rpc_url);
    
    let listener = tokio::net::TcpListener::bind(&addr).await.unwrap();
    axum::serve(listener, app).await.unwrap();
}

async fn root() -> &'static str {
    "NAC API Server v1.0.0"
}

async fn health_check() -> Json<HealthResponse> {
    Json(HealthResponse {
        status: "ok".to_string(),
        version: "1.0.0".to_string(),
        block_height: 0, // TODO: 从区块链获取真实区块高度
        timestamp: chrono::Utc::now().timestamp(),
    })
}