import { JsonQLQuery } from "@mwater/jsonql"
import _ from "lodash"
import { Row } from "./types"

// Fetches data for queries
export default class DataSource {
  /** Performs a single query. Calls cb with (error, rows) or uses promise if no callback */
  performQuery(query: JsonQLQuery): Promise<Row[]>
  performQuery(query: JsonQLQuery, cb: (error: any, rows: Row[]) => void): void
  performQuery(query: any, cb?: any): any {
    throw new Error("Not implemented")
  }

  /** Get the url to download an image (by id from an image or imagelist column)
    Height, if specified, is minimum height needed. May return larger image
  */
  getImageUrl(imageId: string, height?: number): string {
    throw new Error("Not implemented")
  }

  /** Get the url to upload an image (by id from an image or imagelist column)
    POST to upload
  */
  getImageUploadUrl(imageId: string): string {
    throw new Error("Not implemented")
  }

  /** Clears the cache if possible with this data source */
  clearCache(): void {
    throw new Error("Not implemented")
  }

  /** Get the cache expiry time in ms from epoch. No cached items before this time will be used. 0 for no cache limit.
   * Useful for knowing when cache has been cleared, as it will be set to time of clearing.
   */
  getCacheExpiry(): number {
    throw new Error("Not implemented")
  }

  /** Get the url to download a file (by id from an file or filelist column). filename optionally overrides
   * the downloaded filename. GET to download
   */
  getFileUrl(fileId: string, filename?: string): string {
    throw new Error("Not implemented")
  }

  /** Get the url to upload an file (by id from an file or filelist column)
    POST to upload
  */
  getFileUploadUrl(fileId: string): string {
    throw new Error("Not implemented")
  }
}