package com.oms.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

import jakarta.servlet.http.HttpServletRequest;

@Slf4j
@RestControllerAdvice
public class GlobalResponseAdvice implements ResponseBodyAdvice<Object> {

    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        String className = returnType.getDeclaringClass().getName();
        return className.startsWith("com.oms.controller");
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType contentType,
                                  Class<? extends HttpMessageConverter<?>> converterType,
                                  ServerHttpRequest request, ServerHttpResponse response) {
        if (body == null) {
            return ApiResponse.success();
        }
        if (body instanceof ApiResponse) {
            return body;
        }
        if (body instanceof ResponseEntity) {
            ResponseEntity<?> re = (ResponseEntity<?>) body;
            return ApiResponse.success(re.getBody());
        }
        return ApiResponse.success(body);
    }

    @ExceptionHandler(Exception.class)
    public ApiResponse<Void> handleException(Exception e, HttpServletRequest request) {
        log.error("接口 {} 异常: {}", request.getRequestURI(), e.getMessage(), e);
        return ApiResponse.serverError("服务器内部错误: " + e.getMessage());
    }

    @ExceptionHandler(IllegalArgumentException.class)
    public ApiResponse<Void> handleIllegalArgument(IllegalArgumentException e, HttpServletRequest request) {
        return ApiResponse.badRequest(e.getMessage());
    }

    @ExceptionHandler(NullPointerException.class)
    public ApiResponse<Void> handleNullPointer(NullPointerException e, HttpServletRequest request) {
        log.error("接口 {} 空指针异常: {}", request.getRequestURI(), e.getMessage(), e);
        return ApiResponse.serverError("数据不存在或未初始化");
    }
}