package com.webmanage.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindException;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;

import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import java.util.stream.Collectors;

/**
 * 全局异常处理器
 * 
 * @author webmanage
 * @date 2024-08-07
 */
@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 处理参数校验异常
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Result<String> handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
        String message = e.getBindingResult().getFieldErrors().stream()
                .map(FieldError::getDefaultMessage)
                .collect(Collectors.joining(", "));
        log.warn("参数校验失败: {}", message);
        return Result.error(400, "参数校验失败: " + message);
    }

    /**
     * 处理绑定异常
     */
    @ExceptionHandler(BindException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Result<String> handleBindException(BindException e) {
        String message = e.getBindingResult().getFieldErrors().stream()
                .map(FieldError::getDefaultMessage)
                .collect(Collectors.joining(", "));
        log.warn("参数绑定失败: {}", message);
        return Result.error(400, "参数绑定失败: " + message);
    }

    /**
     * 处理约束违反异常
     */
    @ExceptionHandler(ConstraintViolationException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Result<String> handleConstraintViolationException(ConstraintViolationException e) {
        String message = e.getConstraintViolations().stream()
                .map(ConstraintViolation::getMessage)
                .collect(Collectors.joining(", "));
        log.warn("约束校验失败: {}", message);
        return Result.error(400, "约束校验失败: " + message);
    }

    /**
     * 处理参数类型不匹配异常
     */
    @ExceptionHandler(MethodArgumentTypeMismatchException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Result<String> handleMethodArgumentTypeMismatchException(MethodArgumentTypeMismatchException e) {
        log.warn("参数类型不匹配: {}", e.getMessage());
        return Result.error(400, "参数类型不匹配: " + e.getName());
    }

    /**
     * 处理业务异常
     */
    @ExceptionHandler(BusinessException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Result<String> handleBusinessException(BusinessException e) {
        log.warn("业务异常: {}", e.getMessage());
        return Result.error(e.getCode(), e.getMessage());
    }

    /**
     * 处理文件上传异常
     */
    @ExceptionHandler(FileUploadException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Result<String> handleFileUploadException(FileUploadException e) {
        log.warn("文件上传异常: {}", e.getMessage());
        return Result.error(e.getCode(), e.getMessage());
    }

    /**
     * 处理通用运行时异常
     */
    @ExceptionHandler(RuntimeException.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public Result<String> handleRuntimeException(RuntimeException e) {
        log.error("运行时异常: ", e);
        return Result.error(500, "系统内部错误: " + e.getMessage());
    }

    /**
     * 处理通用异常
     */
    @ExceptionHandler(Exception.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public Result<String> handleException(Exception e) {
        log.error("系统异常: ", e);
        return Result.error(500, "系统异常，请联系管理员");
    }
}