package com.testor.common.security.handler;

import javax.servlet.http.HttpServletRequest;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;

import com.testor.common.core.domain.BaseResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;
import com.testor.common.core.constant.HttpStatus;
import com.testor.common.core.exception.DemoModeException;
import com.testor.common.core.exception.InnerAuthException;
import com.testor.common.core.exception.ServiceException;
import com.testor.common.core.exception.auth.NotPermissionException;
import com.testor.common.core.exception.auth.NotRoleException;
import com.testor.common.core.text.Convert;
import com.testor.common.core.utils.StringUtils;
import com.testor.common.core.utils.html.EscapeUtil;
import com.testor.common.core.web.domain.AjaxResult;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

/**
 * 全局异常处理器
 *
 * @author 
 */
@RestControllerAdvice
public class GlobalExceptionHandler
{
    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 权限码异常
     */
    @ExceptionHandler(NotPermissionException.class)
    public AjaxResult handleNotPermissionException(NotPermissionException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',权限码校验失败'{}'", requestURI, e.getMessage());
        return AjaxResult.error(HttpStatus.FORBIDDEN, "没有访问权限，请联系管理员授权");
    }

    /**
     * 角色权限异常
     */
    @ExceptionHandler(NotRoleException.class)
    public AjaxResult handleNotRoleException(NotRoleException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',角色权限校验失败'{}'", requestURI, e.getMessage());
        return AjaxResult.error(HttpStatus.FORBIDDEN, "没有访问权限，请联系管理员授权");
    }

    /**
     * 请求方式不支持
     */
    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    public AjaxResult handleHttpRequestMethodNotSupported(HttpRequestMethodNotSupportedException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',不支持'{}'请求", requestURI, e.getMethod());
        return AjaxResult.error(e.getMessage());
    }

    /**
     * 业务异常
     */
    @ExceptionHandler(ServiceException.class)
    public AjaxResult handleServiceException(ServiceException e, HttpServletRequest request)
    {
        log.error(e.getMessage(), e);
        Integer code = e.getCode();
        return StringUtils.isNotNull(code) ? AjaxResult.error(code, e.getMessage()) : AjaxResult.error(e.getMessage());
    }

    /**
     * 请求路径中缺少必需的路径变量
     */
    @ExceptionHandler(MissingPathVariableException.class)
    public AjaxResult handleMissingPathVariableException(MissingPathVariableException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求路径中缺少必需的路径变量'{}',发生系统异常.", requestURI, e);
        return AjaxResult.error(String.format("请求路径中缺少必需的路径变量[%s]", e.getVariableName()));
    }

    /**
     * 请求参数类型不匹配
     */
    @ExceptionHandler(MethodArgumentTypeMismatchException.class)
    public AjaxResult handleMethodArgumentTypeMismatchException(MethodArgumentTypeMismatchException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        String value = Convert.toStr(e.getValue());
        if (StringUtils.isNotEmpty(value))
        {
            value = EscapeUtil.clean(value);
        }
        log.error("请求参数类型不匹配'{}',发生系统异常.", requestURI, e);
        return AjaxResult.error(String.format("请求参数类型不匹配，参数[%s]要求类型为：'%s'，但输入值为：'%s'", e.getName(), e.getRequiredType().getName(), value));
    }

    /**
     * 拦截未知的运行时异常
     */
    @ExceptionHandler(RuntimeException.class)
    public AjaxResult handleRuntimeException(RuntimeException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',发生未知异常.", requestURI, e);
        return AjaxResult.error(e.getMessage());
    }

    /**
     * 系统异常
     */
    @ExceptionHandler(Exception.class)
    public AjaxResult handleException(Exception e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',发生系统异常.", requestURI, e);
        return AjaxResult.error(e.getMessage());
    }

    /**
     * 自定义验证异常
     */
    @ExceptionHandler(BindException.class)
    public AjaxResult handleBindException(BindException e)
    {
        log.error(e.getMessage(), e);
        String message = e.getAllErrors().get(0).getDefaultMessage();
        return AjaxResult.error(message);
    }

    /**
     * 自定义验证异常
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public Object handleMethodArgumentNotValidException(MethodArgumentNotValidException e)
    {
        log.error(e.getMessage(), e);
        String message = e.getBindingResult().getFieldError().getDefaultMessage();
        return AjaxResult.error(message);
    }

    /**
     * 内部认证异常
     */
    @ExceptionHandler(InnerAuthException.class)
    public AjaxResult handleInnerAuthException(InnerAuthException e)
    {
        return AjaxResult.error(e.getMessage());
    }

    /**
     * 演示模式异常
     */
    @ExceptionHandler(DemoModeException.class)
    public AjaxResult handleDemoModeException(DemoModeException e)
    {
        return AjaxResult.error("演示模式，不允许操作");
    }


    @ResponseBody
    @ExceptionHandler(value = ConstraintViolationException.class)
    public BaseResponse<List<String>> ConstraintViolationExceptionHandler(ConstraintViolationException ex) {
        log.error("----------------------捕获到异常------------------------");
        BaseResponse<List<String>> baseResponse = new BaseResponse();
        Set<ConstraintViolation<?>> constraintViolations = ex.getConstraintViolations();
        Iterator<ConstraintViolation<?>> iterator = constraintViolations.iterator();
        List<String> msgList = new ArrayList<>();
        while (iterator.hasNext()) {
            ConstraintViolation<?> cvl = iterator.next();
            msgList.add(cvl.getMessageTemplate());
        }
        baseResponse.setMsg(msgList.toString());
        return baseResponse;
    }
}
