import { api } from './client';
import type { FlightParameters, RawPrediction } from '$domain';

export function buildLaunchDateTime(date: string, time: string): string {
	const fullTime = time.split(':').length === 2 ? `${time}:00` : time;
	return new Date(`${date}T${fullTime}Z`).toISOString();
}

export interface PredictionResponse {
	result: RawPrediction;
}

export const predictionsApi = {
	run: (params: FlightParameters, launchDateTime: string) => {
		// `dataset` carries only what the operator actually chose. It used to fall
		// back to a client-side guess at which GFS run the server holds — and the
		// guess had degenerated into a hardcoded 2025-04-06, over a year stale. The
		// client cannot know which runs are stored; the predictor refuses one it
		// does not have, so an unset value must stay unset and let the server pick.
		const { dataset, ...rest } = params;
		const payload = {
			...rest,
			...(dataset ? { dataset } : {}),
			launch_datetime: launchDateTime,
		} as FlightParameters & { launch_datetime: string };
		if (payload.start_point === -1) delete payload.start_point;
		return api.post<PredictionResponse>('/predictions/', payload);
	},
};