package cn.iocoder.yudao.framework.dict.core;

import cn.hutool.core.util.ObjectUtil;
import cn.iocoder.yudao.framework.common.core.KeyValue;
import cn.iocoder.yudao.framework.common.util.cache.CacheUtils;
import cn.iocoder.yudao.module.system.api.dict.DictDataApi;
import cn.iocoder.yudao.module.system.api.dict.dto.DictDataRespDTO;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;

import java.time.Duration;
import java.util.List;

/**
 * 字典工具类
 *
 * @author 芋道源码
 */
@Slf4j
public class DictFrameworkUtils {

    private static DictDataApi dictDataApi;

    private static final DictDataRespDTO DICT_DATA_NULL = new DictDataRespDTO();

    // TODO @puhui999：GET_DICT_DATA_CACHE、GET_DICT_DATA_LIST_CACHE、PARSE_DICT_DATA_CACHE 这 3 个缓存是有点重叠，可以思考下，有没可能减少 1 个。微信讨论好私聊，再具体改哈
    /**
     * 针对 {@link #getDictDataLabel(String, String)} 的缓存
     */
    private static final LoadingCache<KeyValue<String, String>, DictDataRespDTO> GET_DICT_DATA_CACHE = CacheUtils.buildAsyncReloadingCache(
            Duration.ofMinutes(1L), // 过期时间 1 分钟
            new CacheLoader<KeyValue<String, String>, DictDataRespDTO>() {

                @Override
                public DictDataRespDTO load(KeyValue<String, String> key) {
                    return ObjectUtil.defaultIfNull(dictDataApi.getDictData(key.getKey(), key.getValue()), DICT_DATA_NULL);
                }

            });

    /**
     * 针对 {@link #getDictDataLabelList(String)} 的缓存
     */
    private static final LoadingCache<String, List<String>> GET_DICT_DATA_LIST_CACHE = CacheUtils.buildAsyncReloadingCache(
            Duration.ofMinutes(1L), // 过期时间 1 分钟
            new CacheLoader<String, List<String>>() {

                @Override
                public List<String> load(String dictType) {
                    return dictDataApi.getDictDataLabelList(dictType);
                }

            });

    /**
     * 针对 {@link #parseDictDataValue(String, String)} 的缓存
     */
    private static final LoadingCache<KeyValue<String, String>, DictDataRespDTO> PARSE_DICT_DATA_CACHE = CacheUtils.buildAsyncReloadingCache(
            Duration.ofMinutes(1L), // 过期时间 1 分钟
            new CacheLoader<KeyValue<String, String>, DictDataRespDTO>() {

                @Override
                public DictDataRespDTO load(KeyValue<String, String> key) {
                    return ObjectUtil.defaultIfNull(dictDataApi.parseDictData(key.getKey(), key.getValue()), DICT_DATA_NULL);
                }

            });

    public static void init(DictDataApi dictDataApi) {
        DictFrameworkUtils.dictDataApi = dictDataApi;
        log.info("[init][初始化 DictFrameworkUtils 成功]");
    }

    @SneakyThrows
    public static String getDictDataLabel(String dictType, Integer value) {
        return GET_DICT_DATA_CACHE.get(new KeyValue<>(dictType, String.valueOf(value))).getLabel();
    }

    @SneakyThrows
    public static String getDictDataLabel(String dictType, String value) {
        return GET_DICT_DATA_CACHE.get(new KeyValue<>(dictType, value)).getLabel();
    }

    @SneakyThrows
    public static List<String> getDictDataLabelList(String dictType) {
        return GET_DICT_DATA_LIST_CACHE.get(dictType);
    }

    @SneakyThrows
    public static String parseDictDataValue(String dictType, String label) {
        return PARSE_DICT_DATA_CACHE.get(new KeyValue<>(dictType, label)).getValue();
    }

}
