"use server";

import { revalidatePath } from "next/cache";

import { requireAdminAccess } from "@/lib/session";
import {
  createUser,
  deleteUser,
  resetUserPassword,
  toBytesFromGiB,
  updateUser,
} from "@/lib/store";

function boolFromForm(value: FormDataEntryValue | null) {
  return value === "on";
}

function optionalDateTime(value: FormDataEntryValue | null) {
  const raw = String(value ?? "").trim();
  return raw ? new Date(raw).toISOString() : null;
}

export async function createUserAction(formData: FormData) {
  await requireAdminAccess();
  await createUser({
    username: String(formData.get("username") ?? "").trim(),
    password: String(formData.get("password") ?? ""),
    enabled: boolFromForm(formData.get("enabled")),
    isAdmin: false,
    expiresAt: optionalDateTime(formData.get("expires_at")),
    trafficLimitBytes: toBytesFromGiB(String(formData.get("traffic_limit_gib") ?? "")),
    notes: String(formData.get("notes") ?? "").trim(),
  });

  revalidatePath("/admin/users");
  revalidatePath("/admin/dashboard");
}

export async function updateUserAction(formData: FormData) {
  await requireAdminAccess();
  await updateUser({
    id: Number(formData.get("id")),
    username: String(formData.get("username") ?? "").trim(),
    enabled: boolFromForm(formData.get("enabled")),
    subscriptionLabel:
      String(formData.get("subscription_label") ?? "").trim() ||
      String(formData.get("username") ?? "").trim(),
    expiresAt: optionalDateTime(formData.get("expires_at")),
    trafficLimitBytes: toBytesFromGiB(String(formData.get("traffic_limit_gib") ?? "")),
    notes: String(formData.get("notes") ?? "").trim(),
  });

  revalidatePath("/admin/users");
  revalidatePath("/admin/dashboard");
}

export async function deleteUserAction(formData: FormData) {
  await requireAdminAccess();
  await deleteUser(Number(formData.get("id")));
  revalidatePath("/admin/users");
  revalidatePath("/admin/dashboard");
}

export async function resetUserPasswordAction(formData: FormData) {
  await requireAdminAccess();
  const password = String(formData.get("password") ?? "");
  if (!password) return;

  await resetUserPassword(Number(formData.get("id")), password);
  revalidatePath("/admin/users");
}