import { GetObjectCommand, PutObjectCommand, type S3ClientConfig as AwsS3ClientConfig } from "@aws-sdk/client-s3";
export interface S3Config {
    bucket: string;
    region: string;
    accessKeyId?: string;
    secretAccessKey?: string;
    endpoint?: string;
}
export interface S3ObjectInfo {
    contentLength?: number;
    contentType?: string;
}
interface S3Transport {
    send(command: unknown): Promise<unknown>;
}
interface ManagedUpload {
    done(): Promise<unknown>;
}
interface ManagedUploadInput {
    client: S3Transport;
    params: {
        Bucket: string;
        Key: string;
        Body: Buffer | Uint8Array;
        ContentType?: string;
    };
}
export interface S3ClientDependencies {
    createClient?: (config: AwsS3ClientConfig) => S3Transport;
    createUpload?: (input: ManagedUploadInput) => ManagedUpload;
    presign?: (client: S3Transport, command: GetObjectCommand | PutObjectCommand, expiresIn: number) => Promise<string>;
}
export declare class S3Client {
    private readonly bucket;
    private readonly client;
    private readonly createUpload;
    private readonly sign;
    constructor(config: S3Config, dependencies?: S3ClientDependencies);
    upload(key: string, body: Buffer | Uint8Array, contentType?: string): Promise<void>;
    download(key: string): Promise<Buffer>;
    head(key: string): Promise<S3ObjectInfo>;
    delete(key: string): Promise<void>;
    presign(key: string, expiresIn: number): Promise<string>;
    presignPut(key: string, contentType: string, expiresIn: number): Promise<string>;
}
export {};
//# sourceMappingURL=s3-client.d.ts.map