"use server";

import { prisma } from "@/lib/db/prisma";
import { getActingStaff } from "@/lib/staff/get-acting-staff";
import { setWorkingHours } from "@/services/staff/staff.service";
import type { WorkingHoursDayInput } from "@/services/staff/staff.service";

export interface WorkingHoursConflictItem {
  id: string;
  customerName: string;
  serviceNames: string;
  startAt: string;
}

export interface WorkingHoursActionResult {
  success: boolean;
  error?: string;
  conflicts?: WorkingHoursConflictItem[];
}

export async function saveWorkingHoursAction(
  days: WorkingHoursDayInput[],
  acknowledgeConflicts = false,
): Promise<WorkingHoursActionResult> {
  const staff = await getActingStaff();
  if (!staff) return { success: false, error: "You must be signed in as staff." };

  const result = await setWorkingHours(prisma, {
    staffId: staff.id,
    businessTimezone: staff.business.timezone,
    days,
    acknowledgeConflicts,
  });
  if (!result.success) {
    return {
      success: false,
      error: result.validation.issues[0]?.message ?? "Couldn't save working hours.",
      conflicts: result.conflicts.map((c) => ({
        id: c.id,
        customerName: `${c.customer.firstName} ${c.customer.lastName}`,
        serviceNames: c.services.map((s) => s.service.name).join(" + "),
        startAt: c.startAt.toISOString(),
      })),
    };
  }
  return { success: true };
}