package com.rongyichuang.common.exception;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.validation.BindException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.dao.DataIntegrityViolationException;

import java.util.HashMap;
import java.util.Map;

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

    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 业务异常处理
     */
    @ExceptionHandler(BusinessException.class)
    public ResponseEntity<Map<String, Object>> handleBusinessException(BusinessException e) {
        logger.warn("业务异常: {}", e.getMessage());
        Map<String, Object> response = new HashMap<>();
        response.put("success", false);
        response.put("message", e.getMessage());
        response.put("code", e.getCode());
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(response);
    }

    /**
     * 参数校验异常处理
     */
    @ExceptionHandler({MethodArgumentNotValidException.class, BindException.class})
    public ResponseEntity<Map<String, Object>> handleValidationException(Exception e) {
        logger.warn("参数校验异常: {}", e.getMessage());
        Map<String, Object> response = new HashMap<>();
        response.put("success", false);
        response.put("message", "参数校验失败");
        response.put("code", "VALIDATION_ERROR");
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(response);
    }

    /**
     * 认证异常处理
     */
    @ExceptionHandler(BadCredentialsException.class)
    public ResponseEntity<Map<String, Object>> handleBadCredentialsException(BadCredentialsException e) {
        logger.warn("认证异常: {}", e.getMessage());
        Map<String, Object> response = new HashMap<>();
        response.put("success", false);
        response.put("message", "用户名或密码错误");
        response.put("code", "AUTHENTICATION_ERROR");
        return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(response);
    }

    /**
     * 权限异常处理
     */
    @ExceptionHandler(AccessDeniedException.class)
    public ResponseEntity<Map<String, Object>> handleAccessDeniedException(AccessDeniedException e) {
        logger.warn("权限异常: {}", e.getMessage());
        Map<String, Object> response = new HashMap<>();
        response.put("success", false);
        response.put("message", "权限不足");
        response.put("code", "ACCESS_DENIED");
        return ResponseEntity.status(HttpStatus.FORBIDDEN).body(response);
    }

    /**
     * 数据库约束违反异常处理
     */
    @ExceptionHandler(DataIntegrityViolationException.class)
    public ResponseEntity<Map<String, Object>> handleDataIntegrityViolationException(DataIntegrityViolationException e) {
        logger.warn("数据库约束违反异常: {}", e.getMessage());
        Map<String, Object> response = new HashMap<>();
        response.put("success", false);
        
        String message = e.getMessage();
        if (message != null && message.contains("phone")) {
            response.put("message", "手机号码已存在，请使用其他手机号码");
            response.put("code", "PHONE_DUPLICATE");
        } else if (message != null && message.contains("Duplicate entry")) {
            response.put("message", "数据重复，请检查输入信息");
            response.put("code", "DUPLICATE_DATA");
        } else {
            response.put("message", "数据保存失败，请检查输入信息");
            response.put("code", "DATA_CONSTRAINT_VIOLATION");
        }
        
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(response);
    }

    /**
     * 系统异常处理
     */
    @ExceptionHandler(Exception.class)
    public ResponseEntity<Map<String, Object>> handleException(Exception e) {
        logger.error("系统异常", e);
        Map<String, Object> response = new HashMap<>();
        response.put("success", false);
        response.put("message", "系统内部错误");
        response.put("code", "SYSTEM_ERROR");
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(response);
    }
}