import { db } from "../db";
import { clients, tags as tagsTable } from "../db/schema";
import { eq, and } from "drizzle-orm";

export async function validateTimeEntryResources({
  organizationId,
  clientId,
  tagId,
}: {
  organizationId: string;
  clientId: string;
  tagId?: string | null;
}) {
  const client = await db
    .select()
    .from(clients)
    .where(
      and(eq(clients.id, clientId), eq(clients.organizationId, organizationId)),
    )
    .get();

  if (!client) {
    return { valid: false, error: "Invalid client" };
  }

  if (tagId) {
    const validTag = await db
      .select()
      .from(tagsTable)
      .where(
        and(
          eq(tagsTable.id, tagId),
          eq(tagsTable.organizationId, organizationId),
        ),
      )
      .get();

    if (!validTag) {
      return { valid: false, error: "Invalid tag" };
    }
  }

  return { valid: true };
}

export function validateTimeRange(
  start: string | number | Date,
  end: string | number | Date,
) {
  const startDate = new Date(start);
  const endDate = new Date(end);

  if (isNaN(startDate.getTime()) || isNaN(endDate.getTime())) {
    return { valid: false, error: "Invalid date format" };
  }

  if (endDate <= startDate) {
    return { valid: false, error: "End time must be after start time" };
  }

  return { valid: true, startDate, endDate };
}