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package com.redis.spring.batch.util;

import java.nio.ByteBuffer;
import java.util.function.Function;

import io.lettuce.core.codec.ByteArrayCodec;
import io.lettuce.core.codec.RedisCodec;
import io.lettuce.core.codec.StringCodec;

public abstract class CodecUtils {

    public static final StringCodec STRING_CODEC = StringCodec.UTF8;

    public static final ByteArrayCodec BYTE_ARRAY_CODEC = ByteArrayCodec.INSTANCE;

    private CodecUtils() {
    }

    public static  Function stringKeyFunction(RedisCodec codec) {
        Function encode = STRING_CODEC::encodeKey;
        return encode.andThen(codec::decodeKey);
    }

    public static  Function toStringKeyFunction(RedisCodec codec) {
        Function encode = codec::encodeKey;
        return encode.andThen(STRING_CODEC::decodeKey);
    }

    public static  Function stringValueFunction(RedisCodec codec) {
        Function encode = STRING_CODEC::encodeValue;
        return encode.andThen(codec::decodeValue);
    }

    public static  Function toStringValueFunction(RedisCodec codec) {
        Function encode = codec::encodeValue;
        return encode.andThen(STRING_CODEC::decodeValue);
    }

    public static  Function byteArrayKeyFunction(RedisCodec codec) {
        Function encode = BYTE_ARRAY_CODEC::encodeKey;
        return encode.andThen(codec::decodeKey);
    }

    public static  Function toByteArrayKeyFunction(RedisCodec codec) {
        Function encode = codec::encodeKey;
        return encode.andThen(BYTE_ARRAY_CODEC::decodeKey);
    }

    public static  Function byteArrayValueFunction(RedisCodec codec) {
        Function encode = BYTE_ARRAY_CODEC::encodeValue;
        return encode.andThen(codec::decodeValue);
    }

    public static  Function toByteArrayValueFunction(RedisCodec codec) {
        Function encode = codec::encodeValue;
        return encode.andThen(BYTE_ARRAY_CODEC::decodeValue);
    }

}