import type { Table } from "./table";

export type ExtractRowShape<T> = T extends Table<infer R> ? R : never;

/**
 * Represents an instance of a row in a table of a database.
 * Wraps the raw Row data and provides methods for interacting with it.
 */
export abstract class Instance<
  TableType extends Table<unknown>,
  SerializedInstanceType = void,
> {
  protected row: ExtractRowShape<TableType>;
  protected table: TableType;

  constructor(table: TableType, row: ExtractRowShape<TableType>) {
    this.row = row;
    this.table = table;
  }

  /**
   * Saves any changes made to the row back to the database.
   */
  save() {
    this.table.update(this.row);
  }

  /**
   * Serializes the instance into a generic format
   */
  serialize(): SerializedInstanceType {
    throw new Error("Not implemented");
  }

  /**
   * @returns The row data as a JSON string.
   */
  toJSON(): string {
    return JSON.stringify(this.row);
  }

  /**
   * Exports the raw row data.
   * @returns The raw row data.
   */
  export(): ExtractRowShape<TableType> {
    return this.row;
  }
}