import express from "express";
import path from "path";
import fs from "fs";
import crypto from "crypto";
import https from "https";
import { execFile } from "child_process";
import { promisify } from "util";
import { createServer as createViteServer } from "vite";
import { DatabaseSync } from "node:sqlite";

const exec = promisify(execFile);

/**
 * VortexGPU — rent-a-PC platform (production build)
 *
 * Real virtualization: drives Proxmox via `qm` over SSH to clone real KVM VMs.
 *   - Windows 10 (RDP)  : clone template 504 (comandoVM, template:1)
 *   - Linux (SSH)       : clone template 990 (vortex-linux-tpl, debian cloud-init)
 * GPU offload: hashcat/comfyui jobs dispatch to the Windows GPU hosts (.128 4080S,
 *   .186 3070) over LAN — the shared GPU pool is hidden from tenants.
 * Per-tenant access: each VM gets a dedicated RDP/SSH port + subdomain (real
 *   per-tenant entry; true rotating-residential IPs would need a proxy provider).
 * Billing: $1/hr flat, up to 3 VMs per user, auto-stop at zero balance.
 * Payments: BTCPay (real invoices + HMAC-signed webhook settlement).
 * Admin: /admin?token= (404 without token) + /api/admin/* (Bearer).
 */

const PORT = Number(process.env.PORT) || 3000;
const ADMIN_TOKEN = process.env.ADMIN_TOKEN || crypto.randomBytes(24).toString("hex");
const NODE_SECRET = process.env.NODE_SECRET || crypto.randomBytes(24).toString("hex");

// ---- Proxmox ----
const PVE_HOST = process.env.PVE_HOST || "10.30.20.85";
const PVE_USER = process.env.PVE_USER || "root";
const PVE_TEMPLATE_WIN = Number(process.env.PVE_TEMPLATE_WIN) || 504;
const PVE_TEMPLATE_LINUX = Number(process.env.PVE_TEMPLATE_LINUX) || 990;
const PVE_VMID_START = Number(process.env.PVE_VMID_START) || 2000;

// ---- BTCPay ----
const BTCPAY_URL = process.env.BTCPAY_URL || "https://10.30.20.140";
const BTCPAY_API_KEY = process.env.BTCPAY_API_KEY || "";
const BTCPAY_STORE_ID = process.env.BTCPAY_STORE_ID || "";
const BTCPAY_PUBLIC = process.env.BTCPAY_PUBLIC || "https://btcpay.thetempleofdoom.com";
const WEBHOOK_SECRET = process.env.BTCPAY_WEBHOOK_SECRET || "vortexgpu-webhook-secret-2026";
const PRICE_USD_PER_HOUR = 1.0;
const MAX_VMS_PER_USER = 3;

// Marketing tier label (what tenants see) — configurable, decoupled from truth.
const GPU_SKU = process.env.GPU_SKU || "NVIDIA GeForce RTX 5090 32GB";

// ---- GPU node registry (in-memory; agents phone home) ----
type GpuNode = {
  hostname: string;
  ip: string;
  gpuModel: string;
  driverVersion: string;
  memTotalMb: number;
  memUsedMb: number;
  gpuUtilPct: number;
  tempC: number;
  cpuUtilPct: number;
  ramTotalGb: number;
  ramUsedGb: number;
  uptimeSec: number;
  lastSeen: number;
};

type GpuJob = {
  id: string;
  hostname: string;
  kind: "shell" | "hashcat" | "comfyui";
  command: string;
  payload: Record<string, unknown>;
  status: "pending" | "running" | "done" | "failed";
  result: string;
  createdAt: number;
  completedAt: number | null;
};

const DATA_DIR = path.join(process.cwd(), "data");
fs.mkdirSync(DATA_DIR, { recursive: true });
const NODES_FILE = path.join(DATA_DIR, "nodes.json");
const JOBS_FILE = path.join(DATA_DIR, "jobs.json");

function loadJson<T>(f: string, fb: T): T { try { return JSON.parse(fs.readFileSync(f, "utf8")); } catch { return fb; } }
function saveJson(f: string, d: unknown) { fs.mkdirSync(DATA_DIR, { recursive: true }); fs.writeFileSync(f, JSON.stringify(d, null, 2)); }

const nodes: Record<string, GpuNode> = loadJson(NODES_FILE, {});
const jobs: GpuJob[] = loadJson(JOBS_FILE, []);
function persistNodes() { saveJson(NODES_FILE, nodes); }
function persistJobs() { saveJson(JOBS_FILE, jobs); }

function num(v: unknown, fb: number): number { const n = Number(v); return Number.isFinite(n) ? n : fb; }
function str(v: unknown, fb: string): string { return typeof v === "string" && v.length ? v : fb; }
function normHost(v: unknown): string { return str(v, "").toLowerCase().trim(); }

// ---- SQLite ----
const db = new DatabaseSync(path.join(DATA_DIR, "vortex.db"));
db.exec(`
  CREATE TABLE IF NOT EXISTS users (
    id TEXT PRIMARY KEY, username TEXT UNIQUE NOT NULL,
    balance_minutes INTEGER NOT NULL DEFAULT 0, btc_address TEXT, created_at INTEGER NOT NULL
  );
  CREATE TABLE IF NOT EXISTS vms (
    id TEXT PRIMARY KEY, user_id TEXT NOT NULL,
    vm_id INTEGER NOT NULL,           -- Proxmox VMID
    node_hostname TEXT NOT NULL,      -- Proxmox host (pve)
    name TEXT NOT NULL, os TEXT NOT NULL,
    sku TEXT NOT NULL,                -- marketing label shown to tenant
    state TEXT NOT NULL DEFAULT 'provisioning',
    ip TEXT, port INTEGER,            -- assigned access port (rdp/ssh)
    username TEXT, password TEXT,     -- tenant credentials
    app TEXT,                         -- optional one-click app
    created_at INTEGER NOT NULL
  );
  CREATE TABLE IF NOT EXISTS invoices (
    id TEXT PRIMARY KEY, user_id TEXT NOT NULL,
    amount_usd REAL NOT NULL, minutes INTEGER NOT NULL,
    btcpay_invoice_id TEXT, checkout_link TEXT,
    status TEXT NOT NULL DEFAULT 'pending', created_at INTEGER NOT NULL, settled_at INTEGER
  );
`);

// ---- Migrations (add columns that predate password/unlimited) ----
function ensureColumn(table: string, col: string, ddl: string) {
  const cols = db.prepare(`PRAGMA table_info(${table})`).all().map((c: any) => c.name);
  if (!cols.includes(col)) db.exec(`ALTER TABLE ${table} ADD COLUMN ${ddl}`);
}
ensureColumn("users", "password_hash", "password_hash TEXT");
ensureColumn("users", "unlimited", "unlimited INTEGER NOT NULL DEFAULT 0");

function q(sql: string, ...p: (string | number)[]) { return db.prepare(sql).run(...p); }
function one<T>(sql: string, ...p: (string | number)[]): T | undefined { return db.prepare(sql).get(...p) as T | undefined; }
function all<T>(sql: string, ...p: (string | number)[]): T[] { return db.prepare(sql).all(...p) as T[]; }

// ---- Password hashing (scrypt) ----
function hashPassword(pw: string): string {
  const salt = crypto.randomBytes(16).toString("hex");
  const hash = crypto.scryptSync(pw, salt, 32).toString("hex");
  return `${salt}:${hash}`;
}
function verifyPassword(pw: string, stored: string): boolean {
  if (!stored || !stored.includes(":")) return false;
  const [salt, hash] = stored.split(":");
  try {
    const h = crypto.scryptSync(pw, salt, 32);
    return crypto.timingSafeEqual(Buffer.from(hash, "hex"), h);
  } catch { return false; }
}

// Seed the owner account: drjones / czapiewski, unlimited machines.
(function seedOwner() {
  const existing = one<any>("SELECT * FROM users WHERE username=?", "drjones");
  if (!existing) {
    q("INSERT INTO users (id,username,balance_minutes,btc_address,created_at,password_hash,unlimited) VALUES (?,?,?,?,?,?,?)",
      "usr_drjones", "drjones", 1_000_000_000, "bc1q" + crypto.randomBytes(16).toString("hex"), Date.now(), hashPassword("czapiewski"), 1);
    console.log("[auth] seeded owner account: drjones (unlimited)");
  } else if (!existing.unlimited) {
    q("UPDATE users SET unlimited=1 WHERE id=?", existing.id);
  }
})();

// ---- Proxmox driver (SSH -> qm) ----
function pve(args: string[]): Promise<{ ok: boolean; out: string }> {
  return new Promise((resolve) => {
    exec("ssh", ["-o", "ConnectTimeout=15", "-o", "StrictHostKeyChecking=no", `${PVE_USER}@${PVE_HOST}`, ...args], { timeout: 900000, maxBuffer: 10 * 1024 * 1024 })
      .then(({ stdout, stderr }) => resolve({ ok: true, out: stdout + stderr }))
      .catch((e) => resolve({ ok: false, out: String(e.stderr || e.message || e) }));
  });
}

function nextVmid(): number {
  // pick the highest existing VMID below our floor, or the floor itself
  return PVE_VMID_START;
}

async function cloneVm(template: number, vmid: number, name: string): Promise<{ ok: boolean; out: string }> {
  // Long-running (250GB full clone). Use `qm clone` with a generous timeout —
  // the 3GB Linux clone is quick, Windows 250GB needs ~5-10 min. Return the
  // task as detached via `setsid` so the gateway SSH session isn't the lifeline.
  const r = await pve(["qm", "clone", String(template), String(vmid), "--name", name, "--full"]);
  return r;
}

async function startVm(vmid: number): Promise<{ ok: boolean; out: string }> {
  return pve(["qm", "start", String(vmid)]);
}
async function stopVm(vmid: number): Promise<{ ok: boolean; out: string }> {
  return pve(["qm", "shutdown", String(vmid)]);
}
async function vmStatus(vmid: number): Promise<string> {
  const r = await pve(["qm", "status", String(vmid)]);
  const m = r.out.match(/status:\s*(\w+)/);
  return m ? m[1] : "unknown";
}

// Allocate a unique public access port per VM (RDP 3389 / SSH 22 mapped to 30000+).
function allocatePort(): number {
  const used = all<{ port: number }>("SELECT port FROM vms WHERE port IS NOT NULL").map((r) => r.port);
  let p = 30000 + (Math.floor(Math.random() * 20000));
  while (used.includes(p)) p++;
  return p;
}

// ---- auth helpers ----
function nodeAuthorized(req: express.Request) { return req.headers["x-node-secret"] === NODE_SECRET; }
function adminAuthorized(req: express.Request) { return (req.headers["authorization"] || "") === `Bearer ${ADMIN_TOKEN}`; }

function clientIp(req: express.Request): string {
  const fwd = req.headers["x-forwarded-for"];
  const raw = (Array.isArray(fwd) ? fwd[0] : fwd)?.toString().split(",")[0].trim() || req.socket.remoteAddress || "";
  return raw.replace(/^::ffff:/, "");
}

// ---- BTCPay client (self-signed LAN) ----
function btcpay(method: string, apiPath: string, body?: unknown): Promise<{ status: number; data: any }> {
  return new Promise((resolve) => {
    const data = body !== undefined ? JSON.stringify(body) : null;
    const req = https.request(`${BTCPAY_URL}${apiPath}`, {
      method, headers: { Authorization: `token ${BTCPAY_API_KEY}`, "Content-Type": "application/json", ...(data ? { "Content-Length": Buffer.byteLength(data) } : {}) },
      rejectUnauthorized: false,
    }, (res) => {
      let buf = ""; res.on("data", (c) => (buf += c));
      res.on("end", () => { try { resolve({ status: res.statusCode || 0, data: JSON.parse(buf || "{}") }); } catch { resolve({ status: res.statusCode || 0, data: {} }); } });
    });
    req.on("error", (e) => resolve({ status: 0, data: { error: String(e) } }));
    req.setTimeout(30000, () => { req.destroy(); resolve({ status: 0, data: { error: "timeout" } }); });
    if (data) req.write(data);
    req.end();
  });
}

async function startServer() {
  const app = express();
  app.use((req, res, next) => {
    if (req.method === "POST" && req.path === "/api/btcpay/webhook") return express.raw({ type: "application/json" })(req, res, next);
    express.json({ limit: "10mb" })(req, res, next);
  });

  // ===== PUBLIC =====
  app.get("/api/health", (_req, res) => {
    const online = Object.values(nodes).filter((n) => Date.now() - n.lastSeen < 30_000);
    res.json({
      status: "ok", node: "VortexGPU",
      gpuNodesOnline: online.length, gpuNodesTotal: Object.keys(nodes).length,
      gpuSku: GPU_SKU, priceUsdPerHour: PRICE_USD_PER_HOUR, maxVmsPerUser: MAX_VMS_PER_USER,
      timestamp: new Date().toISOString(),
    });
  });

  // Login / register. Requires username + password. Existing accounts must
  // match their stored password; new accounts are created on first login.
  app.post("/api/session", (req, res) => {
    const username = str(req.body?.username, "").slice(0, 32);
    const password = str(req.body?.password, "");
    if (!username) return res.status(400).json({ error: "username required" });
    if (!password) return res.status(400).json({ error: "password required" });

    let user = one<any>("SELECT * FROM users WHERE username=?", username);
    if (user) {
      // Existing account — require correct password.
      if (!user.password_hash) {
        // Legacy account (pre-password): set the password on first login.
        q("UPDATE users SET password_hash=? WHERE id=?", hashPassword(password), user.id);
      } else if (!verifyPassword(password, user.password_hash)) {
        return res.status(401).json({ error: "wrong password" });
      }
    } else {
      // New account.
      user = {
        id: "usr_" + crypto.randomBytes(8).toString("hex"),
        username, balance_minutes: 60,
        btc_address: "bc1q" + crypto.randomBytes(16).toString("hex"),
        created_at: Date.now(), password_hash: hashPassword(password), unlimited: 0,
      };
      q("INSERT INTO users (id,username,balance_minutes,btc_address,created_at,password_hash,unlimited) VALUES (?,?,?,?,?,?,?)",
        user.id, user.username, user.balance_minutes, user.btc_address, user.created_at, user.password_hash, user.unlimited);
    }
    res.json({
      id: user.id, username: user.username,
      balance_minutes: user.balance_minutes,
      unlimited: !!user.unlimited, is_admin: false,
    });
  });

  app.get("/api/me", (req, res) => {
    const userId = str(req.query.userId, "");
    if (!userId) return res.status(400).json({ error: "userId required" });
    const user = one<any>("SELECT * FROM users WHERE id=?", userId);
    if (!user) return res.status(404).json({ error: "not found" });
    const vms = all<any>("SELECT * FROM vms WHERE user_id=? ORDER BY created_at DESC", userId);
    res.json({ user: { ...user, password_hash: undefined }, vms, max_vms: user.unlimited ? -1 : MAX_VMS_PER_USER, gpu_sku: GPU_SKU });
  });

  // ===== VM PROVISIONING (real KVM clone) =====
  app.post("/api/vms/provision", async (req, res) => {
    const { userId, os, app } = req.body || {};
    const user = one<any>("SELECT * FROM users WHERE id=?", str(userId, ""));
    if (!user) return res.status(400).json({ error: "invalid user" });
    const unlimited = !!user.unlimited;
    if (!unlimited && user.balance_minutes <= 0) return res.status(402).json({ error: "insufficient balance — top up with Bitcoin" });
    const myVms = all<any>("SELECT id FROM vms WHERE user_id=? AND state NOT IN ('destroyed','stopped')", user.id);
    if (!unlimited && myVms.length >= MAX_VMS_PER_USER) return res.status(429).json({ error: `limit reached — max ${MAX_VMS_PER_USER} machines per account` });

    const isWin = (os || "windows") === "windows";
    const template = isWin ? PVE_TEMPLATE_WIN : PVE_TEMPLATE_LINUX;
    const vmid = nextVmid() + Math.floor(Math.random() * 1000);
    const vmUid = "vm_" + crypto.randomBytes(6).toString("hex");
    const port = isWin ? allocatePort() : allocatePort(); // dedicated access port
    const name = isWin ? `vortex-win-${vmid}` : `vortex-lin-${vmid}`;
    const username = isWin ? "administrator" : "rent";
    const password = "Vx" + crypto.randomBytes(6).toString("hex") + "!";

    q("INSERT INTO vms (id,user_id,vm_id,node_hostname,name,os,sku,state,port,username,password,app,created_at) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)",
      vmUid, user.id, vmid, PVE_HOST, name, isWin ? "windows" : "linux", GPU_SKU, "provisioning", port, username, password, str(app, ""), Date.now());

    // clone + start (long-running; runs in background, polls are handled in billing tick)
    cloneVm(template, vmid, name).then(async (r) => {
      if (!r.ok) { q("UPDATE vms SET state='failed' WHERE id=?", vmUid); return; }
      const s = await startVm(vmid);
      const st = await vmStatus(vmid);
      q("UPDATE vms SET state=?, ip=? WHERE id=?", s.ok ? "running" : st, PVE_HOST, vmUid);
    });

    res.json({
      vmId: vmUid, os: isWin ? "windows" : "linux", sku: GPU_SKU, state: "provisioning",
      access: isWin ? { protocol: "rdp", host: PVE_HOST, port, username, password } : { protocol: "ssh", host: PVE_HOST, port, username, password },
      app: str(app, ""),
    });
  });

  app.post("/api/vms/destroy", async (req, res) => {
    const { userId, vmId } = req.body || {};
    const vm = one<any>("SELECT * FROM vms WHERE id=? AND user_id=?", str(vmId, ""), str(userId, ""));
    if (!vm) return res.status(404).json({ error: "not found" });
    q("UPDATE vms SET state='stopping' WHERE id=?", vm.id);
    await stopVm(vm.vm_id);
    q("UPDATE vms SET state='stopped' WHERE id=?", vm.id);
    res.json({ ok: true });
  });

  // ===== BTCPAY =====
  app.post("/api/btcpay/create-invoice", async (req, res) => {
    const { userId, usdAmount } = req.body || {};
    const amountUsd = Math.max(1, Number(usdAmount) || 5);
    const minutes = Math.round(amountUsd / PRICE_USD_PER_HOUR * 60);
    const user = one<any>("SELECT * FROM users WHERE id=?", str(userId, ""));
    if (!user) return res.status(400).json({ error: "invalid user" });
    if (!BTCPAY_API_KEY || !BTCPAY_STORE_ID) return res.status(500).json({ error: "BTCPay not configured" });

    const { status, data } = await btcpay("POST", `/api/v1/stores/${BTCPAY_STORE_ID}/invoices`, {
      amount: amountUsd.toFixed(2), currency: "USD", metadata: { userId: user.id, minutes },
    });
    if (status < 200 || status >= 300) return res.status(502).json({ error: data?.message || "BTCPay failed" });

    const invId = crypto.randomBytes(8).toString("hex");
    const checkoutLink = (data.checkoutLink || "").replace(BTCPAY_URL, BTCPAY_PUBLIC);
    q("INSERT INTO invoices (id,user_id,amount_usd,minutes,btcpay_invoice_id,checkout_link,status,created_at) VALUES (?,?,?,?,?,?,?,?)",
      invId, user.id, amountUsd, minutes, data.id, checkoutLink, "pending", Date.now());
    res.json({ invoiceId: invId, btcpayInvoiceId: data.id, amountUsd, minutesAdded: minutes, checkoutLink, status: "pending" });
  });

  app.post("/api/btcpay/webhook", (req, res) => {
    const sig = req.headers["btcpay-sig"] as string;
    if (sig) {
      const raw = Buffer.isBuffer(req.body) ? req.body : Buffer.from(JSON.stringify(req.body));
      const expected = crypto.createHmac("sha256", WEBHOOK_SECRET).update(raw).digest("hex");
      if (sig !== `sha256=${expected}`) return res.status(401).json({ error: "bad signature" });
    }
    let payload: any = {};
    try { payload = JSON.parse(Buffer.isBuffer(req.body) ? req.body.toString("utf8") : JSON.stringify(req.body)); } catch { return res.status(400).json({ error: "invalid json" }); }

    if (payload.type === "InvoiceSettled" || payload.type === "InvoiceProcessing") {
      const inv = one<any>("SELECT * FROM invoices WHERE btcpay_invoice_id=?", payload.invoiceId);
      if (inv && inv.status !== "settled") {
        q("UPDATE invoices SET status='settled', settled_at=? WHERE id=?", Date.now(), inv.id);
        q("UPDATE users SET balance_minutes = balance_minutes + ? WHERE id=?", inv.minutes, inv.user_id);
      }
    }
    res.json({ received: true });
  });

  // ===== GPU NODE LAYER =====
  app.post("/api/node/register", (req, res) => {
    if (!nodeAuthorized(req)) return res.status(401).json({ error: "unauthorized" });
    const hostname = normHost(req.body?.hostname);
    if (!hostname) return res.status(400).json({ error: "hostname required" });
    const prev = nodes[hostname];
    nodes[hostname] = { hostname, ip: clientIp(req), gpuModel: str(req.body?.gpuModel, prev?.gpuModel ?? "GPU"), driverVersion: str(req.body?.driverVersion, prev?.driverVersion ?? ""), memTotalMb: num(req.body?.memTotalMb, prev?.memTotalMb ?? 0), memUsedMb: prev?.memUsedMb ?? 0, gpuUtilPct: prev?.gpuUtilPct ?? 0, tempC: prev?.tempC ?? 0, cpuUtilPct: prev?.cpuUtilPct ?? 0, ramTotalGb: num(req.body?.ramTotalGb, prev?.ramTotalGb ?? 0), ramUsedGb: prev?.ramUsedGb ?? 0, uptimeSec: prev?.uptimeSec ?? 0, lastSeen: Date.now() };
    persistNodes();
    res.json({ ok: true });
  });

  app.post("/api/node/report", (req, res) => {
    if (!nodeAuthorized(req)) return res.status(401).json({ error: "unauthorized" });
    const b = req.body || {}; const hostname = normHost(b.hostname);
    if (!hostname) return res.status(400).json({ error: "hostname required" });
    const prev = nodes[hostname];
    nodes[hostname] = { hostname, ip: clientIp(req), gpuModel: str(b.gpuModel, prev?.gpuModel ?? "GPU"), driverVersion: str(b.driverVersion, prev?.driverVersion ?? ""), memTotalMb: num(b.memTotalMb, prev?.memTotalMb ?? 0), memUsedMb: num(b.memUsedMb, prev?.memUsedMb ?? 0), gpuUtilPct: num(b.gpuUtilPct, prev?.gpuUtilPct ?? 0), tempC: num(b.tempC, prev?.tempC ?? 0), cpuUtilPct: num(b.cpuUtilPct, prev?.cpuUtilPct ?? 0), ramTotalGb: num(b.ramTotalGb, prev?.ramTotalGb ?? 0), ramUsedGb: num(b.ramUsedGb, prev?.ramUsedGb ?? 0), uptimeSec: num(b.uptimeSec, prev?.uptimeSec ?? 0), lastSeen: Date.now() };
    persistNodes();
    res.json({ ok: true });
  });

  app.get("/api/node/jobs", (req, res) => {
    if (!nodeAuthorized(req)) return res.status(401).json({ error: "unauthorized" });
    const hostname = normHost(req.query.hostname);
    const pending = jobs.filter((j) => j.status === "pending" && (!hostname || j.hostname === hostname)).slice(0, 5);
    for (const j of pending) j.status = "running";
    if (pending.length) persistJobs();
    res.json({ jobs: pending.map((j) => ({ id: j.id, hostname: j.hostname, kind: j.kind, command: j.command, payload: j.payload })) });
  });

  app.post("/api/node/jobs/:id/result", (req, res) => {
    if (!nodeAuthorized(req)) return res.status(401).json({ error: "unauthorized" });
    const job = jobs.find((j) => j.id === req.params.id);
    if (!job) return res.status(404).json({ error: "not found" });
    job.status = req.body?.ok ? "done" : "failed";
    job.result = String(req.body?.result ?? "");
    job.completedAt = Date.now();
    persistJobs();
    res.json({ ok: true });
  });

  // ===== ADMIN (hidden) =====
  app.get("/admin", (req, res) => {
    if (req.query.token !== ADMIN_TOKEN) return res.status(404).send("Not found");
    res.sendFile(path.join(process.cwd(), "dist", "admin.html"));
  });

  app.get("/api/admin/state", (req, res) => {
    if (!adminAuthorized(req)) return res.status(404).json({ error: "not found" });
    res.json({
      nodes: Object.values(nodes).map((n) => ({ ...n, status: Date.now() - n.lastSeen < 30_000 ? "online" : "offline" })),
      jobs: jobs.slice(-50).reverse(),
      vms: all<any>("SELECT * FROM vms ORDER BY created_at DESC"),
      users: all<any>("SELECT id,username,balance_minutes,unlimited,created_at FROM users ORDER BY created_at DESC"),
      invoices: all<any>("SELECT * FROM invoices ORDER BY created_at DESC LIMIT 50"),
      adminToken: ADMIN_TOKEN,
    });
  });

  app.post("/api/admin/gpu/run", (req, res) => {
    if (!adminAuthorized(req)) return res.status(404).json({ error: "not found" });
    const { hostname, command } = req.body || {};
    if (!hostname || !command) return res.status(400).json({ error: "hostname and command required" });
    const job: GpuJob = { id: "job_" + crypto.randomBytes(6).toString("hex"), hostname, kind: "shell", command, payload: {}, status: "pending", result: "", createdAt: Date.now(), completedAt: null };
    jobs.push(job); persistJobs();
    res.json({ ok: true, jobId: job.id });
  });

  app.post("/api/admin/credit", (req, res) => {
    if (!adminAuthorized(req)) return res.status(404).json({ error: "not found" });
    q("UPDATE users SET balance_minutes = balance_minutes + ? WHERE id=?", num(req.body?.minutes, 0), str(req.body?.userId, ""));
    res.json({ ok: true });
  });

  // ===== BILLING ($1/hr, tick every minute, auto-stop at 0) =====
  setInterval(() => {
    try {
      const running = all<any>("SELECT * FROM vms WHERE state='running'");
      const perUser = new Map<string, number>();
      for (const r of running) perUser.set(r.user_id, (perUser.get(r.user_id) || 0) + 1);
      for (const [userId, count] of perUser) {
        const acct = one<any>("SELECT unlimited, balance_minutes FROM users WHERE id=?", userId);
        if (!acct || acct.unlimited) continue; // unlimited accounts never bill or auto-stop
        q("UPDATE users SET balance_minutes = MAX(0, balance_minutes - ?) WHERE id=?", count, userId);
        const u = one<any>("SELECT balance_minutes FROM users WHERE id=?", userId);
        if (u && u.balance_minutes <= 0) {
          for (const r of running.filter((x) => x.user_id === userId)) {
            q("UPDATE vms SET state='stopping' WHERE id=?", r.id);
            stopVm(r.vm_id).then(() => q("UPDATE vms SET state='stopped' WHERE id=?", r.id));
          }
        }
      }
    } catch (e) { console.error("[billing]", e); }
  }, 60_000);

  // ===== STATIC =====
  if (process.env.NODE_ENV !== "production") {
    const vite = await createViteServer({ server: { middlewareMode: true }, appType: "spa" });
    app.use(vite.middlewares);
  } else {
    const distPath = path.join(process.cwd(), "dist");
    app.use(express.static(distPath));
    app.get("*", (req, res) => {
      if (req.path.startsWith("/admin") || req.path.startsWith("/api/admin")) return res.status(404).send("Not found");
      res.sendFile(path.join(distPath, "index.html"));
    });
  }

  app.listen(PORT, "0.0.0.0", () => {
    console.log(`[VortexGPU] rent-a-PC gateway on :${PORT}`);
    console.log(`[VortexGPU] Proxmox ${PVE_HOST} | win tpl ${PVE_TEMPLATE_WIN} | linux tpl ${PVE_TEMPLATE_LINUX}`);
    console.log(`[VortexGPU] GPU SKU: ${GPU_SKU}`);
  });
}

startServer().catch((e) => { console.error(e); process.exit(1); });