import { parseDateOnly } from "@batch-cooking/date-tools";
import { HttpError } from "@batch-cooking/error-tools";
import { wrapAsyncHandler } from "@batch-cooking/express-tools";
import { ErrorCode, getPlanningByDateSchema } from "@batch-cooking/shared";
import { Router } from "express";
import { type AuthLocals, requireAuth } from "../../middlewares/require-auth.js";
import { getPlanningForDate } from "./planning.service.js";

/** Router mounted at `/planning` in app.ts. */
export const planningRouter = Router();

/**
 * Returns the authenticated user's household's planning covering `?date=`
 * (`YYYY-MM-DD`), or `null` if none exists yet — a valid, common response,
 * not an error (see {@link getPlanningForDate}). Used both for "today"
 * (the planning page's initial load) and for any other week the planning
 * page's week navigator/calendar picks.
 */
planningRouter.get(
  "/",
  requireAuth,
  wrapAsyncHandler<unknown, AuthLocals>(async (req, res) => {
    const input = getPlanningByDateSchema.parse(req.query);
    const date = parseDateOnly(input.date);
    if (date === null) {
      throw new HttpError(
        400,
        ErrorCode.VALIDATION_ERROR,
        `Not a real calendar date: ${input.date}`,
      );
    }

    const planning = await getPlanningForDate(res.locals.userProfile.houseId, date);
    res.status(200).json(planning);
  }),
);