'use server';

import { revalidatePath } from 'next/cache';

import { diffOf, recordAudit } from '@/lib/audit';
import { requireAdmin } from '@/lib/auth/actions';
import { prisma } from '@/lib/db';
import { syncHolidays } from '@/lib/holidays/sync';

export type ActionResult<T = undefined> = { ok: true; value: T } | { ok: false; error: string };

/** Whether the shop closes for a given public holiday. Some are trading days. */
export async function setHolidayClosure(id: string, isAutoClosed: boolean): Promise<ActionResult> {
  const gate = await requireAdmin();
  if (!gate.ok) {
    return { ok: false, error: gate.error };
  }

  const existing = await prisma.publicHoliday.findUnique({ where: { id } });
  if (!existing) {
    return { ok: false, error: 'Ce jour férié n’est plus dans le calendrier.' };
  }

  await prisma.publicHoliday.update({ where: { id }, data: { isAutoClosed } });

  await recordAudit({
    userEmail: gate.value.email,
    action: 'holiday.set_closure',
    entity: 'PublicHoliday',
    entityId: id,
    diff: diffOf(
      { férié: existing.nameFr, fermé: existing.isAutoClosed },
      { férié: existing.nameFr, fermé: isAutoClosed },
    ),
  });

  revalidatePath('/admin');
  revalidatePath('/admin/feries');
  return { ok: true, value: undefined };
}

export async function runHolidaySync(): Promise<ActionResult<{ summary: string }>> {
  const gate = await requireAdmin();
  if (!gate.ok) {
    return { ok: false, error: gate.error };
  }

  const result = await syncHolidays();
  if (!result.ok) {
    return { ok: false, error: `Synchronisation impossible : ${result.error}` };
  }

  await recordAudit({
    userEmail: gate.value.email,
    action: 'holiday.sync',
    entity: 'PublicHoliday',
    diff: {
      ajoutés: { before: null, after: result.created },
      corrigés: { before: null, after: result.updated },
      retirés: { before: null, after: result.removed },
    },
  });

  revalidatePath('/admin');
  revalidatePath('/admin/feries');

  return {
    ok: true,
    value: {
      summary: `${result.created} ajouté(s), ${result.updated} corrigé(s), ${result.removed} retiré(s).`,
    },
  };
}