import path from "path";
import os from "os";

export const BLOG_ROOT = path.resolve(process.cwd(), "..");
export const CONTENT_DIR = path.join(BLOG_ROOT, "content", "posts");
export const STATIC_DIR = path.join(BLOG_ROOT, "static");
export const RECYCLE_DIR = path.join(process.cwd(), ".recycle");
export const RECYCLE_POSTS_DIR = path.join(RECYCLE_DIR, "posts");
export const RECYCLE_META_DIR = path.join(RECYCLE_DIR, "meta");
export const ARTALK_SERVER = "https://artalk.usj.cc";
export const ARTALK_SITE = "优世界";
export const ITEMS_PER_PAGE = 20;
export const RECYCLE_DAYS = 30;
export const HUGO_PREVIEW = "http://localhost:1313";
export const RSS_API_BASE = process.env.RSS_API_BASE || "https://api.usj.cc";
export const RSS_API_TOKEN = process.env.RSS_API_TOKEN || "";
export const WECHAT_APP_ID = process.env.WECHAT_APP_ID || "";
export const WECHAT_APP_SECRET = process.env.WECHAT_APP_SECRET || "";

// Bot 配置
export const TG_BOT_TOKEN = process.env.TG_BOT_TOKEN || "";
export const TG_ALLOWED_IDS: number[] = (process.env.TG_ALLOWED_CHAT_IDS || "")
  .split(",").map((s) => s.trim()).filter(Boolean).map(Number);
export const PREFER_IFACE = process.env.PREFER_IFACE || "WLAN";
export const DEFAULT_AUTHOR = process.env.DEFAULT_AUTHOR || "小赵";

export function getLanIP(): string {
  const ifs = os.networkInterfaces();
  const candidates: { name: string; address: string }[] = [];
  for (const [name, addrs] of Object.entries(ifs)) {
    if (!addrs) continue;
    for (const a of addrs) {
      if (a.family !== "IPv4" || a.internal) continue;
      if (a.address.startsWith("169.254.")) continue;
      candidates.push({ name, address: a.address });
    }
  }
  const pref = candidates.find((c) =>
    c.name.toLowerCase().includes(PREFER_IFACE.toLowerCase())
  );
  if (pref) return pref.address;
  const real = candidates.find((c) => {
    const n = c.name.toLowerCase();
    return !n.includes("vmware") && !n.includes("virtual") && !n.includes("vethernet");
  });
  if (real) return real.address;
  return candidates[0]?.address || "0.0.0.0";
}