import type { ColumnType } from 'kysely';

/** Kysely column type for millisecond epoch timestamps stored as integers. */
export type Timestamp = ColumnType<number, number | undefined, number | undefined>;

/** Kysely column type for binary blobs accepting Buffer or Uint8Array on insert. */
export type BlobColumn = ColumnType<Buffer, Buffer | Uint8Array, Buffer>;

/**
 * One row per (resource_id, public_key). Each publicKey owns a slot within a shared resource.
 */
export interface ResourceDataTable {
    /** Shared resource identifier grouping related instances. */
    resource_id: string;

    /** Owner identity for this instance slot within the resource. */
    public_key: string;

    /** Opaque serialized resource payload. */
    blob: BlobColumn;

    /** Millisecond timestamp of the last write. */
    timestamp: Timestamp;
}

/** Complete Kysely schema mapping for the sync server database. */
export interface DatabaseTables {
    resource_data: ResourceDataTable;
}