package com.oying.exception.handler;

import com.oying.exception.BadRequestException;
import com.oying.exception.EntityExistException;
import com.oying.exception.EntityNotFoundException;
import com.oying.utils.DuplicateKeyExceptionUtil;
import com.oying.utils.ThrowableUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.http.ResponseEntity;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import static org.springframework.http.HttpStatus.*;

/**
 * @author Z
 * @date 2018-11-23
 */
@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 处理所有不可知的异常
     */
    @ExceptionHandler(Throwable.class)
    public ResponseEntity<ApiError> handleException(Throwable e){
        // 打印堆栈信息
        log.error(ThrowableUtil.getStackTrace(e));
        return buildResponseEntity(ApiError.error(e.getMessage()));
    }

    /**
     * BadCredentialsException
     */
    @ExceptionHandler(BadCredentialsException.class)
    public ResponseEntity<ApiError> badCredentialsException(BadCredentialsException e){
        // 打印堆栈信息
        String message = "坏的凭证".equals(e.getMessage()) ? "用户名或密码不正确" : e.getMessage();
        log.error(message);
        return buildResponseEntity(ApiError.error(message));
    }

    /**
     * 处理自定义异常
     */
	@ExceptionHandler(value = BadRequestException.class)
	public ResponseEntity<ApiError> badRequestException(BadRequestException e) {
        // 打印堆栈信息
        log.error(ThrowableUtil.getStackTrace(e));
        return buildResponseEntity(ApiError.error(e.getStatus(),e.getMessage()));
	}

    /**
     * 处理 EntityExist
     */
    @ExceptionHandler(value = EntityExistException.class)
    public ResponseEntity<ApiError> entityExistException(EntityExistException e) {
        // 打印堆栈信息
        log.error(ThrowableUtil.getStackTrace(e));
        return buildResponseEntity(ApiError.error(e.getMessage()));
    }

    /**
     * 处理 EntityNotFound
     */
    @ExceptionHandler(value = EntityNotFoundException.class)
    public ResponseEntity<ApiError> entityNotFoundException(EntityNotFoundException e) {
        // 打印堆栈信息
        log.error(ThrowableUtil.getStackTrace(e));
        return buildResponseEntity(ApiError.error(NOT_FOUND.value(),e.getMessage()));
    }

    /**
     * 处理所有接口数据验证异常
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<ApiError> handleMethodArgumentNotValidException(MethodArgumentNotValidException e){
        // 打印堆栈信息
        log.error(ThrowableUtil.getStackTrace(e));
        ObjectError objectError = e.getBindingResult().getAllErrors().get(0);
        String message = objectError.getDefaultMessage();
        if (objectError instanceof FieldError) {
            message = ((FieldError) objectError).getField() + ": " + message;
        }
        return buildResponseEntity(ApiError.error(message));
    }

    /**
     * 处理 DuplicateKeyException
     */
    @ExceptionHandler(value = DuplicateKeyException.class)
    public ResponseEntity<ApiError> handleDuplicateKeyException(DuplicateKeyException e) {
        // 打印堆栈信息
        log.error(ThrowableUtil.getStackTrace(e));
        return buildResponseEntity(ApiError.error(BAD_REQUEST.value(), DuplicateKeyExceptionUtil.getDisplayMessage(e)));
    }

    /**
     * 统一返回
     */
    private ResponseEntity<ApiError> buildResponseEntity(ApiError apiError) {
        return new ResponseEntity<>(apiError, valueOf(apiError.getStatus()));
    }
}