"use server";

import {
  CustomProxyValidationError,
  parseCustomProxyYaml,
} from "@/lib/custom-proxy";
import { revalidatePath } from "next/cache";

import { requireAdminAccess } from "@/lib/session";
import {
  createNode,
  deleteNode,
  normalizeNodeType,
  updateNode,
} from "@/lib/store";

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

function validateCustomYaml(nodeType: string, formData: FormData) {
  if (nodeType !== "custom") return;
  try {
    parseCustomProxyYaml(String(formData.get("custom_config_yaml") ?? ""));
  } catch (error) {
    if (error instanceof CustomProxyValidationError)
      return { error: error.message };
    throw error;
  }
}

export async function createNodeAction(formData: FormData) {
  await requireAdminAccess();
  const nodeType = normalizeNodeType(
    String(formData.get("node_type") ?? "hy2"),
  );
  const validation = validateCustomYaml(nodeType, formData);
  if (validation) return validation;
  const name = String(formData.get("name") ?? "").trim();
  const clientName = String(formData.get("client_name") ?? "").trim();

  await createNode({
    nodeType,
    slug: String(formData.get("slug") ?? "").trim(),
    name,
    authToken: String(formData.get("auth_token") ?? "").trim() || null,
    hy2Listen: String(formData.get("hy2_listen") ?? "").trim() || "",
    serverHost: String(formData.get("server_host") ?? "").trim(),
    serverPort: Number(formData.get("server_port") ?? 443),
    clientName: clientName || (nodeType === "hy2" ? name : ""),
    bandwidthUpMbps: Number(formData.get("bandwidth_up_mbps") ?? 30),
    bandwidthDownMbps: Number(formData.get("bandwidth_down_mbps") ?? 30),
    skipCertVerify: boolFromForm(formData.get("skip_cert_verify")),
    sni: String(formData.get("sni") ?? "").trim() || null,
    customConfigYaml: String(formData.get("custom_config_yaml") ?? ""),
    trafficStatsUrl: String(formData.get("traffic_stats_url") ?? "").trim(),
    trafficStatsListen:
      String(formData.get("traffic_stats_listen") ?? "").trim() || ":9999",
    trafficStatsSecret: String(
      formData.get("traffic_stats_secret") ?? "",
    ).trim(),
    enabled: boolFromForm(formData.get("enabled")),
    pollIntervalSeconds: Number(formData.get("poll_interval_seconds") ?? 15),
  });

  revalidatePath("/admin/nodes");
  revalidatePath("/admin/subscriptions");
  revalidatePath("/admin/dashboard");
}

export async function updateNodeAction(formData: FormData) {
  await requireAdminAccess();
  const nodeType = normalizeNodeType(
    String(formData.get("node_type") ?? "hy2"),
  );
  const validation = validateCustomYaml(nodeType, formData);
  if (validation) return validation;
  const name = String(formData.get("name") ?? "").trim();
  const clientName = String(formData.get("client_name") ?? "").trim();

  await updateNode({
    id: Number(formData.get("id")),
    nodeType,
    slug: String(formData.get("slug") ?? "").trim(),
    name,
    authToken: String(formData.get("auth_token") ?? "").trim(),
    hy2Listen: String(formData.get("hy2_listen") ?? "").trim() || "",
    serverHost: String(formData.get("server_host") ?? "").trim(),
    serverPort: Number(formData.get("server_port") ?? 443),
    clientName: clientName || (nodeType === "hy2" ? name : ""),
    bandwidthUpMbps: Number(formData.get("bandwidth_up_mbps") ?? 30),
    bandwidthDownMbps: Number(formData.get("bandwidth_down_mbps") ?? 30),
    skipCertVerify: boolFromForm(formData.get("skip_cert_verify")),
    sni: String(formData.get("sni") ?? "").trim() || null,
    customConfigYaml: String(formData.get("custom_config_yaml") ?? ""),
    trafficStatsUrl: String(formData.get("traffic_stats_url") ?? "").trim(),
    trafficStatsListen:
      String(formData.get("traffic_stats_listen") ?? "").trim() || ":9999",
    trafficStatsSecret: String(
      formData.get("traffic_stats_secret") ?? "",
    ).trim(),
    enabled: boolFromForm(formData.get("enabled")),
    pollIntervalSeconds: Number(formData.get("poll_interval_seconds") ?? 15),
  });

  revalidatePath("/admin/nodes");
  revalidatePath("/admin/subscriptions");
  revalidatePath("/admin/dashboard");
}

export async function deleteNodeAction(formData: FormData) {
  await requireAdminAccess();
  await deleteNode(Number(formData.get("id")));
  revalidatePath("/admin/nodes");
  revalidatePath("/admin/subscriptions");
  revalidatePath("/admin/dashboard");
}