package com.vincent.rsf.server.common.exception;

import com.vincent.rsf.framework.common.R;
import com.vincent.rsf.framework.exception.CoolException;
import com.vincent.rsf.server.common.constant.Constants;
import com.vincent.rsf.server.common.utils.CommonUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletResponse;

/**
 * 全局异常处理器
 *
 * @author vincent
 * @since 2018-02-22 11:29:30
 */
@ControllerAdvice
public class GlobalExceptionHandler {
    private final Logger logger = LoggerFactory.getLogger(getClass());

    @ResponseBody
    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    public R methodNotSupportedExceptionHandler(HttpRequestMethodNotSupportedException e,
                                                HttpServletResponse response) {
        e.printStackTrace();
        CommonUtil.addCrossHeaders(response);
        return R.error("The request method is incorrect");
    }

    @ResponseBody
    @ExceptionHandler(AccessDeniedException.class)
    public R accessDeniedExceptionHandler(AccessDeniedException e, HttpServletResponse response) {
        CommonUtil.addCrossHeaders(response);
        return R.parse(Constants.UNAUTHORIZED_CODE + "-" + Constants.UNAUTHORIZED_MSG);
    }

    @ResponseBody
    @ExceptionHandler(BusinessException.class)
    public R businessExceptionHandler(BusinessException e, HttpServletResponse response) {
        CommonUtil.addCrossHeaders(response);
        return R.parse(e.getMessage());
    }

    @ResponseBody
    @ExceptionHandler(CoolException.class)
    public R coolExceptionHandler(CoolException e, HttpServletResponse response) {
        CommonUtil.addCrossHeaders(response);
        return R.error(e.getMessage());
    }


    @ResponseBody
    @ExceptionHandler(Throwable.class)
    public R exceptionHandler(Throwable e, HttpServletResponse response) {
        logger.error(e.getMessage(), e);
        CommonUtil.addCrossHeaders(response);
        // 返回异常信息便于排查，避免仅返回 "Internal server error!"
        String msg = e.getMessage() != null && !e.getMessage().isEmpty() ? e.getMessage() : e.getClass().getSimpleName();
        if (e.getCause() != null && e.getCause().getMessage() != null && !e.getCause().getMessage().isEmpty()) {
            msg = msg + "; cause: " + e.getCause().getMessage();
        }
        return R.error(msg);
    }

}