package com.ruoyi.basic.utils;

import com.ruoyi.basic.dto.SelectOptionDTO;
import com.ruoyi.common.enums.BaseEnum;

import java.util.ArrayList;
import java.util.List;

public class EnumUtils {
    public static List<SelectOptionDTO<?>> getOptions(String className) {
        try {
            Class<?> clazz = Class.forName(className);
            return getOptionsByClass(clazz);
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
    }

    @SuppressWarnings("unchecked")
    private static List<SelectOptionDTO<?>> getOptionsByClass(Class<?> clazz) {
        if (!clazz.isEnum()) {
            throw new RuntimeException("不是枚举：" + clazz.getName());
        }
        if (!BaseEnum.class.isAssignableFrom(clazz)) {
            throw new RuntimeException("未实现 BaseEnum：" + clazz.getName());
        }
        return (List<SelectOptionDTO<?>>) getOptionsInternal((Class) clazz);
    }

    private static <T> List<SelectOptionDTO<T>> getOptionsInternal(
            Class<? extends BaseEnum<T>> clazz) {

        Enum<?>[] enums = (Enum<?>[]) clazz.getEnumConstants();
        List<SelectOptionDTO<T>> list = new ArrayList<>();

        for (Enum<?> e : enums) {
            BaseEnum<T> option = (BaseEnum<T>) e;
            list.add(new SelectOptionDTO<>(
                    option.getCode(),
                    option.getValue()
            ));
        }
        return list;
    }
}