export interface LfsBatchRequest {
	operation: "download" | "upload";
	transfers?: string[];
	objects: LfsObject[];
}

export interface LfsObject {
	oid: string;
	size: number;
}

export interface LfsBatchResponse {
	transfer?: string;
	objects: LfsObjectResult[];
}

export interface LfsObjectResult {
	oid: string;
	size: number;
	authenticated?: boolean;
	actions?: LfsActions;
	error?: LfsObjectError;
}

export interface LfsActions {
	download?: LfsAction;
	upload?: LfsAction;
	verify?: LfsAction;
}

export interface LfsAction {
	href: string;
	header?: Record<string, string>;
	expires_in?: number;
}

export interface LfsObjectError {
	code: number;
	message: string;
}

export interface LfsVerifyRequest {
	oid: string;
	size: number;
}

const LFS_CONTENT_TYPE = "application/vnd.git-lfs+json";

export function lfsJson(body: unknown, status = 200): Response {
	return new Response(JSON.stringify(body), {
		status,
		headers: { "Content-Type": LFS_CONTENT_TYPE },
	});
}

export function lfsError(code: number, message: string): Response {
	return lfsJson({ message }, code);
}