package com.innovation.platform.exception;

import com.innovation.platform.common.Result;
import lombok.extern.slf4j.Slf4j;
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.RestControllerAdvice;

import java.util.stream.Collectors;

/**
 * 全局异常处理器
 */
@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 业务异常
     */
    @ExceptionHandler(RuntimeException.class)
    public Result<Void> handleRuntimeException(RuntimeException e) {
        log.error("业务异常: {}", e.getMessage(), e);
        return Result.error(400, e.getMessage());
    }

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

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

    /**
     * 其他异常
     */
    @ExceptionHandler(Exception.class)
    public Result<Void> handleException(Exception e) {
        log.error("系统异常: {}", e.getMessage(), e);
        return Result.error(500, "系统异常，请稍后重试");
    }
}
