import { RedisCommandArgument, RedisCommandArguments } from '@redis/client/dist/lib/commands';
import { pushVerdictArgument } from '@redis/client/dist/lib/commands/generic-transformers';
import { CompressionOption, pushCompressionArgument } from '.';

export const FIRST_KEY_INDEX = 1;

interface MergeOptions extends CompressionOption {
    OVERRIDE?: boolean;
}

export function transformArguments(
    destKey: RedisCommandArgument,
    srcKeys: RedisCommandArgument | Array<RedisCommandArgument>,
    options?: MergeOptions
): RedisCommandArguments {
    const args = pushVerdictArgument(
        ['TDIGEST.MERGE', destKey],
        srcKeys
    );

    pushCompressionArgument(args, options);

    if (options?.OVERRIDE) {
        args.push('OVERRIDE');
    }

    return args;
}

export declare function transformReply(): 'OK';