import { Iterable } from '../../../../../lib/src/collection/Iterable.ts'
import ConnectionExecutable from "../ConnectionExecutable.ts";
import {QueryRow} from "../../../db/types.ts";
import {Collection} from "../../../../../lib/src/collection/Collection.ts";

export abstract class ResultSet<T> extends Iterable<any> {

    protected constructor(
        protected executeable: ConnectionExecutable,
    ) {
        super()
    }

    abstract async process_row(row: QueryRow): Promise<T>

    async at_index(i: number) {
        return this.process_row(await this.executeable.get_row(i))
    }

    async from_range(start: number, end: number) {
        const results = await this.executeable.get_range(start, end)
        const returns = new Collection<T>()
        for ( const row of results ) {
            returns.push(await this.process_row(row))
        }

        return returns
    }

    async count() {
        return this.executeable.count()
    }
}