import { Request, Response } from 'express';
import { KnexCrudOptions } from './KnexCrudOptions';
import { CrudHandler } from './CrudHandler';

export class KnexCrudHandler implements CrudHandler {
  protected table: string;
  protected columns: Array<string>;
  protected options: KnexCrudOptions;

  public constructor (
    table: string,
    columns: Array<string>,
    options: KnexCrudOptions = {}
  ) {
    this.table = table;
    this.columns = columns;
    this.options = options;
  }

  private call_auth (auth?: Function, req: Request, res: Response): boolean {
    if (typeof auth === 'undefined')
      return true;

    const promise = new Promise ((resolve) => {
      const result = auth (req, res, resolve);
    });
  }

  public async create (req: Request, res: Response): Promise<void> {
    if (typeof req.body === 'undefined')
      throw new Error ('request body is undefined. is body-parser running?');
    const data = JSON.parse (req.body);
  }

  public async read (req: Request, res: Response): Promise<void> {

  }

  public async update (req: Request, res: Response): Promise<void> {

  }

  public async delete (req: Request, res: Response): Promise<void> {

  }
}