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package io.github.firefang.power.exception.handler;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;

import io.github.firefang.power.exception.BadRequestException;
import io.github.firefang.power.exception.BusinessException;
import io.github.firefang.power.exception.NoPermissionException;
import io.github.firefang.power.exception.UnAuthorizedException;
import io.github.firefang.power.web.CommonResponse;

/**
 * 异常处理工具类
 * 
 * @author xinufo
 *
 */
public class ExceptionHandleUtil {

    private ExceptionHandleUtil() {
    }

    public static ResponseEntity> handle(UnAuthorizedException ex) {
        return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
                .body(CommonResponse.fail(CommonResponse.UNAUTHORIZED, ex.getMessage()));
    }

    public static ResponseEntity handle(NoPermissionException ex) {
        return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
    }

    public static ResponseEntity> handle(BusinessException ex, Logger log) {
        String operation = ex.getOperation();
        String reason = ex.getMessage();
        StringBuilder msg = new StringBuilder();
        msg.append("执行[").append(operation).append("]失败");

        if (reason != null) {
            msg.append(", 原因: ").append(reason);
        }

        String msgStr = msg.toString();
        if (log.isWarnEnabled()) {
            log.warn("业务异常: " + msgStr);
        }

        CommonResponse body = CommonResponse.fail(CommonResponse.BUSINESS_FAIL, msgStr);
        return ResponseEntity.ok().body(body);
    }

    public static ResponseEntity> handle(BadRequestException ex) {
        CommonResponse body = CommonResponse.fail(CommonResponse.BAD_REQUEST, ex.getMessage());
        return ResponseEntity.badRequest().body(body);
    }

    public static ResponseEntity> handleUnknownException(Exception ex, Logger log) {
        log.error("未知异常", ex);
        CommonResponse body = CommonResponse.fail(CommonResponse.INTERNAL_ERROR, "未知异常");
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(body);
    }

    public static ResponseEntity