import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpExchange;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.nio.charset.StandardCharsets;

public class CardApiServer {
    public static void main(String[] args) throws IOException {
        HttpServer server = HttpServer.create(new InetSocketAddress(8666), 0);
        
        server.createContext("/api/card", new HttpHandler() {
            @Override
            public void handle(HttpExchange exchange) throws IOException {
                if ("GET".equals(exchange.getRequestMethod())) {
                    try {
                        BankCardBean cardBean = VirCardNoUtils.getBankCardBean();
                        
                        String json = String.format(
                            "{\"cardNo\":\"%s\",\"bankId\":\"%s\",\"cvv\":\"%s\",\"bankName\":\"%s\",\"validityPeriod\":\"%s\",\"holderName\":\"%s\",\"gender\":\"%s\",\"holderIdCardNo\":\"%s\"}",
                            cardBean.getCardNo(),
                            cardBean.getBankId(),
                            cardBean.getCvv(),
                            cardBean.getBankName(),
                            cardBean.getValidityPeriod(),
                            cardBean.getHolderName(),
                            cardBean.getGender(),
                            cardBean.getHolderIdCardNo()
                        );
                        
                        exchange.getResponseHeaders().set("Content-Type", "application/json; charset=UTF-8");
                        exchange.getResponseHeaders().set("Access-Control-Allow-Origin", "*");
                        exchange.sendResponseHeaders(200, json.getBytes(StandardCharsets.UTF_8).length);
                        OutputStream os = exchange.getResponseBody();
                        os.write(json.getBytes(StandardCharsets.UTF_8));
                        os.close();
                    } catch (Exception e) {
                        e.printStackTrace();
                        String error = "{\"error\":\"" + e.getMessage() + "\"}";
                        exchange.sendResponseHeaders(500, error.getBytes(StandardCharsets.UTF_8).length);
                        OutputStream os = exchange.getResponseBody();
                        os.write(error.getBytes(StandardCharsets.UTF_8));
                        os.close();
                    }
                } else {
                    exchange.sendResponseHeaders(405, -1);
                }
            }
        });
        
        server.setExecutor(null);
        server.start();
        System.out.println("========================================");
        System.out.println("信用卡生成 API 服务器已启动！");
        System.out.println("API 地址: http://localhost:8666/api/card");
        System.out.println("========================================");
    }
}