package com.lxzn.base.controller;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class TypeConverter {
    private static final Logger logger = LoggerFactory.getLogger(TypeConverter.class);
    private static final ObjectMapper objectMapper = new ObjectMapper();

    public static <T> List<T> convertList(List<?> rawList, Class<T> targetType) {
        if (rawList == null || rawList.isEmpty()) {
            return Collections.emptyList();
        }

        return rawList.stream()
                .map(item -> {
                    try {
                        // 处理嵌套Map结构
                        if (item instanceof Map) {
                            return objectMapper.convertValue(item, targetType);
                        }
                        // 如果已经是目标类型直接转换
                        if (targetType.isInstance(item)) {
                            return targetType.cast(item);
                        }
                        throw new IllegalArgumentException("类型不兼容: " + item.getClass() + " -> " + targetType);
                    } catch (Exception e) {
                        logger.error("类型转换失败: {}", e.getMessage());
                        throw new TypeConversionException("无法转换类型: " + item.getClass().getName() + " 到 " + targetType.getName());
                    }
                })
                .collect(Collectors.toList());
    }

    public static class TypeConversionException extends RuntimeException {
        public TypeConversionException(String message) {
            super(message);
        }
    }
}