#!/usr/bin/env python3
"""
ZernProxy Manager v22 - Soft-Tariff with SQLite
"""

import json
import base64
import logging
import asyncio
import io
import os
import qrcode
import uuid
import hashlib
import secrets
import sqlite3
import time
from datetime import datetime, timedelta
from qrcode.image.styledpil import StyledPilImage
from qrcode.image.styles.moduledrawers import SquareModuleDrawer
from typing import List, Dict, Optional, Tuple
from contextlib import contextmanager, asynccontextmanager
from fastapi import FastAPI, Response, HTTPException, Query, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import HTMLResponse, FileResponse, JSONResponse, RedirectResponse
from fastapi.staticfiles import StaticFiles
import uvicorn
import httpx
import re
from py3xui import Api
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
logger = logging.getLogger("zernproxy")

BASE_DIR = os.path.dirname(os.path.abspath(__file__))
SERVERS_CONF = os.path.join(BASE_DIR, "servers.conf")
SETTINGS_CONF = os.path.join(BASE_DIR, "settings.conf")
USERS_DB = os.path.join(BASE_DIR, "users.db")
LOGO_PATH = os.path.join(BASE_DIR, "logo.png")
MOTD_PATH = os.path.join(BASE_DIR, "motd.txt")
WEB_DIR = os.path.join(BASE_DIR, "web")

servers = []
settings = {}
last_donation_id = 0

# In-memory cache
_links_cache: Dict[str, Tuple[List[str], float]] = {}
_traffic_cache: Dict[str, Tuple[Dict, float]] = {}
CACHE_TTL_TRAFFIC = 120
CACHE_TTL_LINKS = 86400 * 7

def _get_cached(key: str, cache: dict, ttl: float):
    entry = cache.get(key)
    if entry and time.time() - entry[1] < ttl:
        return entry[0]
    return None

def _set_cache(key: str, value, cache: dict):
    cache[key] = (value, time.time())

def get_cached_links(sub_id: str):
    return _get_cached(sub_id, _links_cache, CACHE_TTL_LINKS)

def set_cached_links(sub_id: str, links: List[str]):
    _set_cache(sub_id, links, _links_cache)

def get_cached_traffic(sub_id: str):
    return _get_cached(sub_id, _traffic_cache, CACHE_TTL_TRAFFIC)

def set_cached_traffic(sub_id: str, data: dict):
    _set_cache(sub_id, data, _traffic_cache)

def clear_cache(sub_id: str = None):
    if sub_id:
        _links_cache.pop(sub_id, None)
        _traffic_cache.pop(sub_id, None)
    else:
        _links_cache.clear()
        _traffic_cache.clear()

def load_json(path: str, default: dict) -> dict:
    if os.path.exists(path):
        try:
            with open(path, "r", encoding="utf-8") as f:
                return json.load(f)
        except Exception as e:
            logger.error(f"Error loading {path}: {e}")
    return default

def save_json(path: str, data: dict):
    try:
        with open(path, "w", encoding="utf-8") as f:
            json.dump(data, f, indent=4, ensure_ascii=False)
    except Exception as e:
        logger.error(f"Error saving {path}: {e}")

def init_db():
    conn = sqlite3.connect(USERS_DB)
    conn.execute("""
        CREATE TABLE IF NOT EXISTS users (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            username TEXT UNIQUE NOT NULL,
            subscription_id TEXT UNIQUE NOT NULL,
            tier TEXT DEFAULT 'free',
            tariff_days_bought INTEGER DEFAULT 0,
            tariff_days_remaining INTEGER DEFAULT 0,
            total_paid_rubles INTEGER DEFAULT 0,
            traffic_limit_gb INTEGER DEFAULT 0,
            is_active BOOLEAN DEFAULT 1,
            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
        )
    """)
    conn.commit()
    conn.close()

def get_db():
    conn = sqlite3.connect(USERS_DB, timeout=30.0)
    conn.row_factory = sqlite3.Row
    return conn

def load_configs():
    global servers, settings
    servers = load_json(SERVERS_CONF, {"servers": []}).get("servers", [])
    settings = load_json(SETTINGS_CONF, {
        "general": {"title": "ZernProxy", "host": "conn.zernmc.ru", "support_url": ""},
        "announcement": "",
        "shortid_rotation_hours": 11,
        "tiers": {
            "free": {"name": "Free", "servers": [], "traffic_limit_gb": 0},
            "paid": {"name": "Premium", "servers": [], "traffic_limit_gb": 0}
        },
        "payments": {"donationalerts": {"enabled": False, "api_token": "", "webhook_secret": "", "check_interval_minutes": 5}},
        "auto_propagate": {"enabled": False, "interval_minutes": 60}
    })
    logger.info(f"Loaded {len(servers)} servers")

init_db()
load_configs()

def render_template(name: str, **kwargs) -> str:
    path = os.path.join(WEB_DIR, name)
    try:
        with open(path, "r", encoding="utf-8") as f:
            html = f.read()
    except FileNotFoundError:
        logger.error(f"Template not found: {path}")
        return "Template error"
    for k, v in kwargs.items():
        html = html.replace(f"{{%{k}%}}", str(v))
    return html

def get_flag_emoji(country_code: str) -> str:
    if not country_code or len(country_code) < 2:
        return ""
    try:
        return chr(ord(country_code[0].upper()) + 127397) + chr(ord(country_code[1].upper()) + 127397)
    except:
        return ""

def generate_qr_base64(data: str, size: int = 300) -> str:
    qr = qrcode.QRCode(version=None, error_correction=qrcode.constants.ERROR_CORRECT_M, box_size=10, border=2)
    qr.add_data(data)
    qr.make(fit=True)
    img = qr.make_image(fill_color="black", back_color="white", image_factory=StyledPilImage, module_drawer=SquareModuleDrawer())
    img = img.resize((size, size), resample=0)
    buffered = io.BytesIO()
    img.save(buffered, format="PNG")
    return base64.b64encode(buffered.getvalue()).decode()

def get_logo_base64() -> Optional[str]:
    if os.path.exists(LOGO_PATH):
        try:
            with open(LOGO_PATH, "rb") as f:
                return base64.b64encode(f.read()).decode()
        except:
            pass
    return None

def get_motd() -> str:
    if os.path.exists(MOTD_PATH):
        try:
            with open(MOTD_PATH, "r", encoding="utf-8") as f:
                return f.read().strip()
        except:
            pass
    return ""

def format_bytes(bytes_val: int) -> str:
    if bytes_val == 0:
        return "0 B"
    sizes = ["B", "KB", "MB", "GB", "TB"]
    i = 0
    val = float(bytes_val)
    while val >= 1024 and i < len(sizes) - 1:
        val /= 1024
        i += 1
    return f"{val:.1f} {sizes[i]}" if val < 100 else f"{int(val)} {sizes[i]}"

def _parse_throughput(s: str) -> float:
    if not s:
        return 0.0
    total_bytes = 0.0
    for m in re.finditer(r'([\d.]+)\s*([KMGT])?B/s', s):
        val = float(m.group(1))
        unit = m.group(2)
        if unit == 'K': val *= 1024
        elif unit == 'M': val *= 1024**2
        elif unit == 'G': val *= 1024**3
        elif unit == 'T': val *= 1024**4
        total_bytes += val
    return total_bytes / 1024

def calc_health_score(checks: dict) -> tuple:
    cpu = checks.get("CPU", {}).get("value")
    ram = checks.get("RAM", {}).get("value")
    disk = checks.get("Disk /", {}).get("value")
    net_raw = checks.get("Net ↓↑", {}).get("value", "")
    io_raw = checks.get("Disk I/O", {}).get("value", "")

    cpu_s = cpu if cpu is not None else 50
    ram_s = ram if ram is not None else 50
    disk_s = disk if disk is not None else 50

    net_kbs = _parse_throughput(net_raw)
    io_kbs = _parse_throughput(io_raw)

    if net_kbs < 500:
        net_s = 0
    elif net_kbs < 10000:
        net_s = (net_kbs - 500) / 9500 * 50
    elif net_kbs < 100000:
        net_s = 50 + (net_kbs - 10000) / 90000 * 30
    else:
        net_s = min(100, 80 + (net_kbs - 100000) / 100000 * 20)

    if io_kbs < 100:
        io_s = 0
    elif io_kbs < 10000:
        io_s = (io_kbs - 100) / 9900 * 50
    elif io_kbs < 100000:
        io_s = 50 + (io_kbs - 10000) / 90000 * 30
    else:
        io_s = min(100, 80 + (io_kbs - 100000) / 100000 * 20)

    score = cpu_s * 0.30 + ram_s * 0.25 + disk_s * 0.20 + net_s * 0.15 + io_s * 0.10

    if score < 40:
        return (round(score), "#10b981", "Отлично")
    elif score < 70:
        return (round(score), "#f59e0b", "Нагружен")
    else:
        return (round(score), "#f43f5e", "Критично")

def get_traffic_stats(sub_id: str) -> dict:
    total_up = 0
    total_down = 0
    by_server = {}
    
    for srv in servers:
        srv_up = 0
        srv_down = 0
        for inbound in srv.get("inbounds", []):
            api_host = inbound.get("api_host")
            api_user = inbound.get("api_user")
            api_pass = inbound.get("api_pass")
            inbound_id = inbound.get("id")
            
            if not all([api_host, api_user, api_pass, inbound_id]):
                continue
            
            try:
                api = Api(host=api_host, username=api_user, password=api_pass, use_tls_verify=False)
                api.login()
                
                inbounds = api.inbound.get_list()
                for ib in inbounds:
                    if ib.id == inbound_id and ib.client_stats:
                        for client in ib.client_stats:
                            if getattr(client, 'sub_id', '') == sub_id:
                                srv_up += client.up or 0
                                srv_down += client.down or 0
            except:
                pass
        
        if srv_up or srv_down:
            by_server[srv["name"]] = {"up": srv_up, "down": srv_down}
        total_up += srv_up
        total_down += srv_down
    
    return {"total_up": total_up, "total_down": total_down, "by_server": by_server}

def generate_sub_id(length: int = 16) -> str:
    return ''.join(secrets.choice('abcdefghijklmnopqrstuvwxyz0123456789') for _ in range(length))

async def fetch_vless_links(url: str) -> List[str]:
    async with httpx.AsyncClient(verify=False, timeout=10.0, follow_redirects=True) as client:
        try:
            resp = await client.get(url)
            if resp.status_code == 404 or resp.status_code == 400:
                logger.warning(f"Sub not found on server: {url}")
                return []
            if resp.status_code == 200:
                content = resp.text.strip()
                try:
                    decoded = base64.b64decode(content).decode('utf-8')
                    links = re.findall(r'([a-z]+://[^\s\n]+)', decoded)
                    if links:
                        return links
                except:
                    pass
                return re.findall(r'([a-z]+://[^\s\n]+)', content)
        except Exception as e:
            logger.error(f"Fetch error: {e}")
    return []

def find_user_on_servers(sub_id: str) -> Optional[str]:
    """Ищет юзера на 3x-UI серверах по subId, возвращает username"""
    logger.info(f"Looking for sub_id: {sub_id}")
    for srv in servers:
        for inbound in srv.get("inbounds", []):
            api_host = inbound.get("api_host")
            api_user = inbound.get("api_user")
            api_pass = inbound.get("api_pass")
            inbound_id = inbound.get("id")
            
            if not all([api_host, api_user, api_pass, inbound_id]):
                continue
            
            try:
                api = Api(host=api_host, username=api_user, password=api_pass, use_tls_verify=False)
                api.login()
                
                inbounds = api.inbound.get_list()
                for ib in inbounds:
                    if ib.id == inbound_id and ib.client_stats:
                        for client in ib.client_stats:
                            client_subid = getattr(client, 'sub_id', '') or ''
                            logger.info(f"Found client: {client.email} sub_id: {client_subid}")
                            if client_subid == sub_id:
                                email = client.email or ""
                                if '@' in email:
                                    username = email.split('@')[0]
                                    if '_' in username:
                                        username = username.split('_')[0]
                                    logger.info(f"Migrated user: {username} (found on {srv['name']}/{inbound['name']})")
                                    return username
            except Exception as e:
                logger.error(f"Error checking {srv['name']}/{inbound['name']}: {e}")
    
    return None

def get_user_tier(sub_id: str) -> Tuple[Optional[dict], str]:
    conn = get_db()
    try:
        user = conn.execute("SELECT * FROM users WHERE subscription_id = ?", (sub_id,)).fetchone()
        
        if not user:
            username = find_user_on_servers(sub_id)
            if username:
                try:
                    conn.execute("""
                        INSERT INTO users (username, subscription_id, tier, tariff_days_bought, tariff_days_remaining, total_paid_rubles, traffic_limit_gb, is_active)
VALUES (?, ?, 'free', 0, 0, 0, 0, 1)
                    """, (username, sub_id))
                    conn.commit()
                    user = conn.execute("SELECT * FROM users WHERE subscription_id = ?", (sub_id,)).fetchone()
                    logger.info(f"User migrated: {username}")
                except sqlite3.IntegrityError:
                    pass
            
            if not user:
                return None, "free"
        
        user = dict(user)
        
        if user['tier'] == 'paid' and user['tariff_days_remaining'] <= 0:
            conn.execute("UPDATE users SET tier = 'free' WHERE id = ?", (user['id'],))
            conn.commit()
            user['tier'] = 'free'
        
        return user, user['tier']
    finally:
        conn.close()

def get_servers_for_tier(tier: str) -> List[dict]:
    result = []
    for srv in servers:
        if not srv.get("is_active"):
            continue
        result.append(srv)
    return result

def deduplicate_inbounds(servers_list: List[dict], tier: str) -> List[Tuple[dict, dict]]:
    seen = set()
    result = []
    for srv in servers_list:
        for inbound in srv.get("inbounds", []):
            if tier == "free" and not inbound.get("is_free", True):
                continue
            
            key = (srv["name"], inbound.get("name", ""))
            if key not in seen:
                seen.add(key)
                result.append((srv, inbound))
    return result

@asynccontextmanager
async def lifespan(app):
    ap_cfg = settings.get("auto_propagate", {})
    if ap_cfg.get("enabled", False):
        interval = max(10, ap_cfg.get("interval_minutes", 60)) * 60
        logger.info(f"Auto-propagate enabled, interval={interval}s")
        loop = asyncio.get_event_loop()
        async def _run():
            while True:
                for srv in servers:
                    if not srv.get("is_active", True):
                        continue
                    try:
                        result = await loop.run_in_executor(None, propagate_server_sync, srv["name"])
                        if result.get("added", 0) or result.get("failed", 0):
                            logger.info(f"Auto-propagate {srv['name']}: +{result.get('added',0)} added, {result.get('failed',0)} failed, {result.get('skipped',0)} skipped")
                    except:
                        logger.exception(f"Auto-propagate error on {srv.get('name','?')}")
                await asyncio.sleep(interval)
        task = asyncio.create_task(_run())
    yield
    if ap_cfg.get("enabled", False):
        task.cancel()

app = FastAPI(title="ZernProxy Manager", docs_url=None, redoc_url=None, lifespan=lifespan)
app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_methods=["*"], allow_headers=["*"])
app.mount("/web", StaticFiles(directory=WEB_DIR), name="web")

ADMIN_USER = settings.get("admin", {}).get("username", "admin")
ADMIN_PASS = settings.get("admin", {}).get("password", "")

def check_admin(request: Request) -> bool:
    if not ADMIN_PASS:
        return True
    token = request.cookies.get("admin_token", "")
    if token == ADMIN_PASS:
        return True
    auth = request.headers.get("Authorization", "")
    if auth.startswith("Basic "):
        try:
            decoded = base64.b64decode(auth[6:]).decode()
            u, p = decoded.split(":", 1)
            if u == ADMIN_USER and p == ADMIN_PASS:
                return True
        except:
            pass
    return False

@app.get("/admin/login")
async def admin_login_page():
    return HTMLResponse(content=render_template("admin_login.html", title="Вход", error_msg=""))

@app.post("/admin/login")
async def admin_login(request: Request):
    data = await request.form()
    if data.get("username") == ADMIN_USER and data.get("password") == ADMIN_PASS:
        resp = RedirectResponse(url="/admin/users", status_code=303)
        resp.set_cookie(key="admin_token", value=ADMIN_PASS, max_age=86400 * 7, httponly=True)
        return resp
    return HTMLResponse(content=render_template("admin_login.html", title="Вход", error_msg='<div class="login-err">Неверный пароль</div>'), status_code=401)

@app.get("/sub/{subscription_id}")
async def get_subscription(request: Request, subscription_id: str, format: str = Query("base64", pattern="^(json|base64|raw)$")):
    accept = request.headers.get("accept", "")
    if "text/html" in accept and format == "base64":
        return await get_web_page(subscription_id)
    
    user, tier = get_user_tier(subscription_id)
    if not user:
        raise HTTPException(404, "User not found")
    
    if not user.get("is_active"):
        raise HTTPException(403, "User is disabled")
    
    tier_config = settings.get("tiers", {}).get(tier, {})
    servers_for_tier = get_servers_for_tier(tier)
    inbounds = deduplicate_inbounds(servers_for_tier, tier)
    
    if not inbounds:
        raise HTTPException(404, "No servers available")
    
    all_links = get_cached_links(subscription_id)
    if all_links is None:
        all_links = []
        seen_links = set()
        servers_processed = set()
        server_links = {}
        
        for srv, inbound in inbounds:
            srv_name = srv["name"]
            
            if srv_name not in servers_processed:
                servers_processed.add(srv_name)
                sub_path = srv["sub_path"].format(sub_id=subscription_id)
                url = f"{srv['subscription_url'].rstrip('/')}{sub_path}"
                server_links[srv_name] = await fetch_vless_links(url)
            
            links = server_links.get(srv_name, [])
            srv_inbounds = [ib for s, ib in inbounds if s["name"] == srv_name]
            try:
                link_idx = srv_inbounds.index(inbound)
            except ValueError:
                continue
            
            if link_idx >= len(links):
                continue
            
            link = links[link_idx]
            clean_link = link.split('#')[0]
            if clean_link in seen_links:
                continue
            seen_links.add(clean_link)
            
            remark = f"{get_flag_emoji(srv.get('country', ''))} {srv_name.upper()} ({inbound['name']})"
            all_links.append(f"{clean_link}#{remark}")
        
        set_cached_links(subscription_id, all_links)
    
    if not all_links:
        raise HTTPException(404, "No links found")
    
    if format == "json":
        return {"links": all_links, "count": len(all_links), "tier": tier}
    
    lines = []
    motd_text = get_motd()
    announce_header = ""
    
    if motd_text:
        announce_header = f"base64:{base64.b64encode(motd_text.encode()).decode()}"
    elif settings.get("announcement"):
        announce_header = f"base64:{base64.b64encode(settings['announcement'].encode()).decode()}"
    
    host = settings.get("general", {}).get("host", "conn.zernmc.ru")
    title = settings.get("general", {}).get("title", "ZernProxy")
    support_url = settings.get("general", {}).get("support_url", "")
    update_interval = 12
    
    web_url = f"https://{host}/sub/{subscription_id}"
    lines.append(f"#profile-web-page-url: {web_url}")
    lines.append(f"#profile-title: {title}")
    lines.append(f"#profile-update-interval: {update_interval}")
    lines.append("#hide-settings: 1")
    if support_url:
        lines.append(f"#support-url: {support_url}")
    
    expire_ts = 0
    if user.get("tariff_days_remaining", 0) > 0:
        expire_ts = int((datetime.now() + timedelta(days=user["tariff_days_remaining"])).timestamp())
        lines.append("#sub-expire: 1")
        if support_url:
            lines.append(f"#sub-expire-button-link: {support_url}")
    
    traffic_limit = user.get("traffic_limit_gb") or tier_config.get("traffic_limit_gb", 0)
    traffic_limit_bytes = traffic_limit * 1073741824 if traffic_limit > 0 else 0
    
    traffic = get_cached_traffic(subscription_id)
    if not traffic:
        traffic = get_traffic_stats(subscription_id)
        set_cached_traffic(subscription_id, traffic)
    upload = traffic.get("total_up", 0)
    download = traffic.get("total_down", 0)
    
    lines.append(f"#subscription-userinfo: upload={upload}; download={download}; total={traffic_limit_bytes}; expire={expire_ts}")
    
    if announce_header:
        lines.append(f"#announce: {announce_header}")
    
    lines.extend(all_links)
    content = "\n".join(lines)
    
    headers = {
        "Profile-Title": title,
        "Profile-Update-Interval": str(update_interval),
        "Profile-Web-Page-Url": web_url,
        "Subscription-Userinfo": f"upload={upload}; download={download}; total={traffic_limit_bytes}; expire={expire_ts}",
        "Content-Disposition": f"attachment; filename={title}_{user['username']}",
    }
    if announce_header:
        headers["Announce"] = announce_header
    if support_url:
        headers["Support-Url"] = support_url
    headers["Hide-Settings"] = "1"
    if expire_ts:
        headers["Sub-Expire"] = "1"
        if support_url:
            headers["Sub-Expire-Button-Link"] = support_url
    
    if format == "base64":
        return Response(content=base64.b64encode(content.encode()).decode(), media_type="text/plain; charset=utf-8", headers=headers)
    return Response(content=content, media_type="text/plain; charset=utf-8", headers=headers)

async def get_web_page(subscription_id: str):
    user, tier = get_user_tier(subscription_id)
    if not user:
        raise HTTPException(404, "User not found")
    
    tier_config = settings.get("tiers", {}).get(tier, {})
    servers_for_tier = get_servers_for_tier(tier)
    inbounds = deduplicate_inbounds(servers_for_tier, tier)
    
    host = settings.get("general", {}).get("host", "conn.zernmc.ru")
    title = settings.get("general", {}).get("title", "ZernProxy")
    announcement = get_motd() or settings.get("announcement", "")
    da_config = settings.get("payments", {}).get("donationalerts", {})
    
    sub_url = f"https://{host}/sub/{subscription_id}"
    qr_base64 = generate_qr_base64(sub_url, size=300)
    logo_base64 = get_logo_base64()
    
    logo_html = f'<img src="data:image/png;base64,{logo_base64}" alt="Logo" class="logo-img">' if logo_base64 else '<div class="logo-emoji">⚡</div>'
    announcement_html = f'<div class="announcement">{announcement}</div>' if announcement else ''
    
    tier_color = "#4CAF50" if tier == "paid" else "#757575"
    tier_name = tier_config.get("name", "Free")
    tier_badge = f'<span class="tier-badge" style="background: {tier_color}">{tier_name}</span>'
    
    days_remaining = user.get("tariff_days_remaining", 0)
    days_info = f"<p>⏳ Осталось дней: {days_remaining}</p>" if tier == "paid" and days_remaining > 0 else ""
    
    traffic = get_cached_traffic(subscription_id)
    if not traffic:
        traffic = get_traffic_stats(subscription_id)
        set_cached_traffic(subscription_id, traffic)
    traffic_limit_val = user.get('traffic_limit_gb') or tier_config.get('traffic_limit_gb', 0)
    traffic_limit_str = "∞" if traffic_limit_val == 0 else f"{traffic_limit_val} GB"
    traffic_info = f"<p>📊 Лимит: {traffic_limit_str}</p><p>⬆️ {format_bytes(traffic['total_up'])} | ⬇️ {format_bytes(traffic['total_down'])}</p>"
    
    traffic_details = ""
    if traffic.get("by_server"):
        for srv_name, data in traffic["by_server"].items():
            if data["up"] or data["down"]:
                traffic_details += f'<div class="traffic-server"><span class="server-name">{srv_name}</span>: <span class="traffic-values">⬆ {format_bytes(data["up"])} ⬇ {format_bytes(data["down"])}</span></div>'
    
    info_html = f'<div class="info-block">{days_info}{traffic_info}{traffic_details}</div>' if days_info or traffic_info or traffic_details else ''
    
    servers_html = "".join(f'<span class="srv-tag">{get_flag_emoji(srv.get("country", ""))} {srv["name"].upper()}</span>' for srv in servers_for_tier)
    
    support_btn = ""
    if da_config.get("enabled"):
        da_url = da_config.get("url", "#")
        support_btn = f'''
        <a href="{da_url}" class="btn btn-support" target="_blank">
            Поддержать проект
        </a>
        '''
    
    html = render_template("sub.html",
        title=title, logo_html=logo_html, tier_badge=tier_badge,
        announcement_html=announcement_html, info_html=info_html,
        servers_html=servers_html, qr_base64=qr_base64,
        sub_url=sub_url, support_btn=support_btn)
    return HTMLResponse(content=html)

@app.post("/payment/webhook/donationalerts")
async def webhook_donationalerts(request: Request):
    da_config = settings.get("payments", {}).get("donationalerts", {})
    webhook_secret = da_config.get("webhook_secret", "")
    
    if webhook_secret:
        provided = request.headers.get("X-Webhook-Secret", "")
        if provided != webhook_secret:
            return JSONResponse({"error": "Invalid secret"}, status_code=403)
    
    try:
        data = await request.json()
    except:
        return JSONResponse({"error": "Invalid JSON"}, status_code=400)
    
    amount = data.get("amount", 0)
    username = data.get("username", "")
    message = data.get("message", "")
    donation_id = data.get("id", 0)
    
    logger.info(f"DA webhook: id={donation_id} amount={amount} username={username}")
    
    user = None
    message_parts = message.split() if message else []
    
    for part in message_parts:
        conn = get_db()
        try:
            if part.isdigit():
                user = conn.execute("SELECT * FROM users WHERE id = ?", (int(part),)).fetchone()
            if not user:
                user = conn.execute("SELECT * FROM users WHERE username = ? COLLATE NOCASE", (part,)).fetchone()
            if user:
                break
        finally:
            conn.close()
    
    if not user and username:
        conn = get_db()
        try:
            user = conn.execute("SELECT * FROM users WHERE username = ? COLLATE NOCASE", (username,)).fetchone()
        finally:
            conn.close()
    
    if not user:
        return JSONResponse({"status": "ignored", "reason": "user_not_found"})
    
    tiers_config = settings.get("tiers", {})
    tier = None
    days = 0
    
    for tier_name, tier_data in tiers_config.items():
        prices = tier_data.get("prices", {})
        tier_days = tier_data.get("days", {})
        for price_key, price_val in prices.items():
            if amount == price_val:
                tier = tier_name
                days = tier_days.get(price_key, 30)
                break
        if tier:
            break
    
    if not tier:
        return JSONResponse({"status": "ignored", "reason": "amount_not_recognized"})
    
    conn = get_db()
    try:
        conn.execute("""
            UPDATE users SET 
                tier = ?,
                tariff_days_bought = tariff_days_bought + ?,
                tariff_days_remaining = tariff_days_remaining + ?,
                total_paid_rubles = total_paid_rubles + ?
            WHERE id = ?
        """, (tier, days, days, amount, user["id"]))
        conn.commit()
    finally:
        conn.close()
    
    logger.info(f"VPN payment: {username} paid {amount} RUB, +{days} days")
    return JSONResponse({"status": "ok", "user": user["username"], "days": days})

@app.get("/admin/users")
async def admin_users(request: Request):
    if not check_admin(request):
        return HTMLResponse(content=render_template("admin_login.html", title="Вход", error_msg=""))
    conn = get_db()
    try:
        users = conn.execute("SELECT * FROM users ORDER BY created_at DESC").fetchall()
    finally:
        conn.close()
    
    da_config = settings.get("payments", {}).get("donationalerts", {})
    
    title = settings.get("general", {}).get("title", "ZernProxy")
    tier_options = "".join(
        f'<option value="{k}">{v.get("name", k.capitalize())}</option>'
        for k, v in settings.get("tiers", {}).items())
    users_rows = ""
    for u in users:
        traffic = f'{u["traffic_limit_gb"]} GB' if u['traffic_limit_gb'] > 0 else '&#8734;'
        active = '&#10003;' if u['is_active'] else '&#10007;'
        tier_display = u['tier'].upper()
        users_rows += f'''<tr>
            <td>{u['id']}</td>
            <td style="font-weight:600;color:var(--text)">{u['username']}</td>
            <td><code>{u['subscription_id']}</code></td>
            <td><span class="badge badge-{u['tier']}">{tier_display}</span></td>
            <td>{u['tariff_days_remaining']}</td>
            <td>{u['total_paid_rubles']}&#8381;</td>
            <td>{traffic}</td>
            <td>{active}</td>
            <td>{u['created_at'][:10]}</td>
            <td>
                <button class="btn-sm" onclick="editUser({u['id']}, '{u['tier']}', {u['tariff_days_remaining']}, {u['traffic_limit_gb']}, {1 if u['is_active'] else 0})">&#9997;&#65039;</button>
                <button class="btn-sm danger" onclick="deleteUser({u['id']}, '{u['username']}')">&#128465;&#65039;</button>
            </td>
        </tr>'''
    html = render_template("admin_users.html",
        title=title, user_count=len(users), users_rows=users_rows,
        tier_options=tier_options)
    return HTMLResponse(content=html)

@app.get("/admin/dashboard")
async def admin_dashboard(request: Request):
    if not check_admin(request):
        return HTMLResponse(content=render_template("admin_login.html", title="Вход", error_msg=""))
    
    conn = get_db()
    try:
        total_users = conn.execute("SELECT COUNT(*) as c FROM users").fetchone()["c"]
        free_users = conn.execute("SELECT COUNT(*) as c FROM users WHERE tier='free'").fetchone()["c"]
        paid_users = conn.execute("SELECT COUNT(*) as c FROM users WHERE tier='paid'").fetchone()["c"]
        test_users = conn.execute("SELECT COUNT(*) as c FROM users WHERE tier='test'").fetchone()["c"]
        total_revenue = conn.execute("SELECT SUM(total_paid_rubles) as s FROM users").fetchone()["s"] or 0
        total_donations = conn.execute("SELECT SUM(total_paid_rubles) as s FROM users WHERE total_paid_rubles > 0").fetchone()["s"] or 0
    finally:
        conn.close()
    
    online_count = 0
    for srv in servers:
        for inbound in srv.get("inbounds", []):
            try:
                api = Api(host=inbound["api_host"], username=inbound["api_user"], password=inbound["api_pass"], use_tls_verify=False)
                api.login()
                online = api.client.online()
                online_count += len(online)
            except:
                pass
    
    title = settings.get("general", {}).get("title", "ZernProxy")
    servers_rows = "".join(
        f'<div class="srv-row"><span class="srv-name">{get_flag_emoji(s.get("country",""))} {s["name"].upper()}</span><span class="srv-ibs">{len(s.get("inbounds",[]))} inbound</span><button class="btn-sm" onclick="syncServer(\'{s["name"]}\')">&#128260;</button></div>'
        for s in servers)
    html = render_template("admin_dashboard.html",
        title=title, total_users=total_users, free_users=free_users,
        paid_users=paid_users, test_users=test_users,
        online_count=online_count, total_revenue=total_revenue,
        server_count=len(servers),
        inbound_count=sum(len(s.get("inbounds",[])) for s in servers),
        servers_rows=servers_rows)
    return HTMLResponse(content=html)

@app.get("/")
async def home_page():
    title = settings.get("general", {}).get("title", "ZernProxy")
    da_url = settings.get("payments", {}).get("donationalerts", {}).get("url", "")
    
    statuses = await fetch_servers_status()
    
    srv_cards = ""
    for i, s in enumerate(statuses):
        chk = s.get("checks", {})
        cpu = chk.get("CPU", {}).get("value")
        ram = chk.get("RAM", {}).get("value")
        disk = chk.get("Disk /", {}).get("value")
        srv_name = s.get("server_name", s["name"].upper())
        delay = 0.45 + i * 0.15
        online = s.get("online", False)
        
        srv_inbounds = []
        for srv_cfg in servers:
            if srv_cfg["name"] == s["name"]:
                srv_inbounds = srv_cfg.get("inbounds", [])
                all_ib = srv_inbounds
                has_free = any(ib.get("is_free", True) for ib in all_ib)
                has_paid = any(not ib.get("is_free", True) for ib in all_ib)
                break
        else:
            has_free = True
            has_paid = True
        
        if has_free and has_paid:
            badge = '<span class="tier both">Free+Premium</span>'
        elif has_free:
            badge = '<span class="tier free">Free</span>'
        else:
            badge = '<span class="tier prem">Premium</span>'
        
        if online:
            _, hc, hl = calc_health_score(chk)
            s1 = cpu if cpu is not None else 0
            s2 = ram if ram is not None else 0
            s3 = disk if disk is not None else 0
            stats = f'<div class="s-stats">CPU {s1:.0f}%&nbsp;&middot; RAM {s2:.0f}%&nbsp;&middot; DSK {s3:.0f}%</div>'
        else:
            hc = "#475569"
            hl = "Offline"
            stats = '<div class="s-stats off">Offline</div>'
        
        inbound_cards = ""
        for ib in srv_inbounds:
            ib_name = ib.get("name", "unknown")
            ib_type = ib.get("network", ib.get("flow", ""))
            inbound_cards += f'<div class="ib-card"><span class="ib-dot"></span><span class="ib-name">{ib_name}</span><span class="ib-type">{ib_type}</span></div>\n'
        
        ru_note = ""
        if s.get("country", "").lower() == "ru" and online:
            ru_note = '<div class="ru-note">&#9733; Нет рекламы в YouTube &middot; Адаптирован к будущему ограничению 15 ГБ зарубежного трафика через Proxy</div>'
        
        srv_cards += f'''
<div class="s-card" style="--d: {delay}s; --hl: {hc}">
  <div class="s-head">
    <span class="flag">{get_flag_emoji(s.get("country",""))}</span> {srv_name} {badge}
    <span class="h-dot" style="background:{hc}"></span>
    <span class="h-lbl" style="color:{hc}">{hl}</span>
  </div>
  {stats}
  <div class="ib-list">{inbound_cards}</div>
  {ru_note}
</div>'''
    
    return HTMLResponse(content=render_template("home.html", title=title, da_url=da_url, srv_cards=srv_cards))


async def fetch_servers_status() -> list:
    results = []
    async with httpx.AsyncClient(timeout=8.0, verify=False) as client:
        for srv in servers:
            url = srv.get("status_url", "")
            entry = {"name": srv["name"], "country": srv.get("country",""), "checks": {}, "online": False, "uptime": ""}
            if not url:
                results.append(entry)
                continue
            try:
                resp = await client.get(url)
                if resp.status_code == 200:
                    data = resp.json()
                    entry["online"] = True
                    entry["server_name"] = data.get("server_name", "")
                    entry["checks"] = data.get("checks", {})
                else:
                    entry["checks"]["error"] = {"value": f"HTTP {resp.status_code}"}
            except Exception as e:
                entry["checks"]["error"] = {"value": str(e)[:50]}
            results.append(entry)
    return results

@app.get("/webhook/tg")
async def tg_webhook():
    bot_cfg = settings.get("bot", {})
    if bot_cfg.get("enabled"):
        return JSONResponse({"status": "ok", "bot": True, "message": "Telegram bot is ready"})
    return JSONResponse({"status": "ok", "bot": False, "message": "Telegram bot not configured"})

def create_3xui_client(username: str, sub_id: str, inbound: dict, traffic_gb: int = 0) -> dict:
    """Создаёт клиента на 3x-UI сервере"""
    api_host = inbound.get("api_host")
    api_user = inbound.get("api_user")
    api_pass = inbound.get("api_pass")
    inbound_id = inbound.get("id")
    
    if not all([api_host, api_user, api_pass, inbound_id]):
        return {"success": False, "error": "missing_credentials"}
    
    try:
        api = Api(host=api_host, username=api_user, password=api_pass, use_tls_verify=False)
        api.login()
        
        inbound_name = inbound.get('name', 'default')
        email = f"{username}_{inbound_name}@vless.local"
        total_bytes = traffic_gb * 1073741824 if traffic_gb > 0 else 0
        
        logger.info(f"Creating client: email={email}, total_bytes={total_bytes}, inbound={inbound_name}")
        
        from py3xui.client import Client
        if inbound.get("protocol") == "trojan":
            client = Client(
                id="",
                password=str(uuid.uuid4()),
                email=email,
                enable=True,
                total_gb=total_bytes,
                expiry_time=0,
                limit_ip=0,
                subId=sub_id
            )
        else:
            client = Client(
                id=str(uuid.uuid4()),
                email=email,
                enable=True,
                total_gb=total_bytes,
                expiry_time=0,
                limit_ip=0,
                subId=sub_id
            )
        
        try:
            existing = api.client.get_by_email(email)
            if existing:
                logger.info(f"Deleting existing client: {existing.id}")
                api.client.delete(existing.id, inbound_id)
        except:
            pass
        
        logger.info(f"About to add client: {client}")
        api.client.add(inbound_id=inbound_id, clients=[client])
        logger.info(f"Client created successfully on {inbound_name}")
        return {"success": True, "email": email}
        
    except Exception as e:
        logger.error(f"Error creating client: {e}")
        import traceback
        logger.error(traceback.format_exc())
        return {"success": False, "error": str(e)[:150]}

def delete_3xui_client(username: str, sub_id: str, inbound: dict) -> dict:
    """Удаляет клиента с 3x-UI сервера"""
    api_host = inbound.get("api_host")
    api_user = inbound.get("api_user")
    api_pass = inbound.get("api_pass")
    inbound_id = inbound.get("id")
    
    if not all([api_host, api_user, api_pass, inbound_id]):
        return {"success": False, "error": "missing_credentials"}
    
    try:
        api = Api(host=api_host, username=api_user, password=api_pass, use_tls_verify=False)
        api.login()
        
        inbounds = api.inbound.get_list()
        for ib in inbounds:
            if ib.id == inbound_id and ib.client_stats:
                for client in ib.client_stats:
                    if getattr(client, 'sub_id', '') == sub_id:
                        api.client.delete(inbound_id, client.uuid)
                        logger.info(f"Deleted client from {inbound.get('name')}")
                        return {"success": True}
        
        return {"success": True, "error": "not_found"}
        
    except Exception as e:
        return {"success": False, "error": str(e)[:100]}

def fetch_server_sub_ids(srv: dict) -> dict:
    result = {}
    srv_name = srv.get("name", "?")
    for inbound in srv.get("inbounds", []):
        api_host = inbound.get("api_host")
        api_user = inbound.get("api_user")
        api_pass = inbound.get("api_pass")
        inbound_id = inbound.get("id")
        ib_name = inbound.get("name", "?")
        if not all([api_host, api_user, api_pass, inbound_id]):
            continue
        try:
            from concurrent.futures import ThreadPoolExecutor, TimeoutError as FutureTimeout
            def _fetch():
                api = Api(host=api_host, username=api_user, password=api_pass, use_tls_verify=False)
                api.login()
                ids = set()
                for ib in api.inbound.get_list():
                    if ib.id == inbound_id and ib.client_stats:
                        for client in ib.client_stats:
                            sid = getattr(client, 'sub_id', '') or ''
                            if sid:
                                ids.add(sid)
                return ids
            with ThreadPoolExecutor(max_workers=1) as ex:
                future = ex.submit(_fetch)
                try:
                    fetched = future.result(timeout=20)
                    result[inbound_id] = fetched
                    logger.info(f"fetch_server_sub_ids {srv_name}/{ib_name}: got {len(fetched)} sub_ids")
                except FutureTimeout:
                    logger.warning(f"Timeout fetching clients from {srv_name}/{ib_name}")
        except Exception as e:
            logger.warning(f"fetch_server_sub_ids {srv_name}/{ib_name} error: {e}")
    logger.info(f"fetch_server_sub_ids {srv_name}: inbound count {len(result)}")
    return result

def propagate_server_sync(server_name: str) -> dict:
    target_srv = next((s for s in servers if s["name"] == server_name), None)
    if not target_srv:
        return {"error": "Server not found"}
    conn = get_db()
    try:
        users = conn.execute("SELECT username, subscription_id, traffic_limit_gb, is_active FROM users WHERE is_active = 1").fetchall()
    finally:
        conn.close()
    other_servers = [s for s in servers if s.get("is_active", True) and s["name"] != server_name]
    threshold = max(1, len(other_servers) // 2 + 1)
    
    target_ib_ids = fetch_server_sub_ids(target_srv)
    other_ids = {}
    for s in other_servers:
        ib_dict = fetch_server_sub_ids(s)
        flat = set()
        for ids in ib_dict.values():
            flat.update(ids)
        other_ids[s["name"]] = flat
    
    total = len(users)
    added = skipped = failed = 0
    inbound_stats = {}
    for ib in target_srv.get("inbounds", []):
        inbound_stats[ib.get("name", f"id_{ib.get('id','?')}")] = 0
    
    results = []
    for u in users:
        sub_id = u["subscription_id"]
        username = u["username"]
        
        count = sum(1 for s in other_servers if sub_id in other_ids.get(s["name"], set()))
        if count < threshold:
            skipped += 1
            results.append({"username": username, "skipped": True, "servers": count, "total": len(other_servers)})
            continue
        
        user_added = False
        for inbound in target_srv.get("inbounds", []):
            ib_id = inbound.get("id")
            ib_name = inbound.get("name", "?")
            existing = target_ib_ids.get(ib_id, set())
            if sub_id in existing:
                continue
            r = create_3xui_client(username, sub_id, inbound, u["traffic_limit_gb"] or 0)
            if r.get("success"):
                user_added = True
                inbound_stats[ib_name] = inbound_stats.get(ib_name, 0) + 1
                clear_cache(sub_id)
            else:
                failed += 1
                results.append({"username": username, "inbound": ib_name, "error": r.get("error", "")})
        
        if user_added:
            added += 1
            results.append({"username": username, "added": True})
    
    already = sum(1 for u in users if u["subscription_id"] in {sid for ids in target_ib_ids.values() for sid in ids})
    return {"server": server_name, "total": total, "already_on_server": already,
        "added": added, "skipped": skipped, "failed": failed,
        "threshold": f"{threshold}/{len(other_servers)}",
        "per_inbound_added": inbound_stats, "results": results}

@app.post("/admin/api/propagate/{server_name}")
async def propagate_server(request: Request, server_name: str):
    if not check_admin(request):
        return JSONResponse({"error": "Unauthorized"}, status_code=401)
    result = propagate_server_sync(server_name)
    if "error" in result:
        return JSONResponse(result, status_code=404)
    return JSONResponse(result)

@app.post("/admin/api/users")
async def create_user(request: Request, data: dict):
    if not check_admin(request):
        return JSONResponse({"error": "Unauthorized"}, status_code=401)
    username = data.get("username", "").strip()
    if not username:
        return JSONResponse({"error": "username required"}, status_code=400)
    
    sub_id = generate_sub_id()
    conn = get_db()
    
    traffic_gb = int(data.get("traffic_limit_gb", 0) or 0)
    logger.info(f"Creating user: username={username}, traffic_gb={traffic_gb}")
    
    results = []
    for srv in servers:
        srv_result = {"server": srv["name"], "inbounds": []}
        for inbound in srv.get("inbounds", []):
            result = create_3xui_client(username, sub_id, inbound, traffic_gb)
            srv_result["inbounds"].append({
                "name": inbound.get("name"),
                "success": result["success"],
                "error": result.get("error", "")
            })
        results.append(srv_result)
    
    try:
        conn.execute("""
            INSERT INTO users (username, subscription_id, tier, tariff_days_bought, tariff_days_remaining, total_paid_rubles, traffic_limit_gb, is_active)
            VALUES (?, ?, 'free', 0, 0, 0, 0, 1)
        """, (username, sub_id))
        conn.commit()
    except sqlite3.IntegrityError:
        conn.close()
        return JSONResponse({"error": "username exists"}, status_code=400)
    finally:
        conn.close()
    
    success_count = sum(1 for r in results for ib in r["inbounds"] if ib["success"])
    total_count = sum(len(r["inbounds"]) for r in results)
    
    return JSONResponse({
        "status": "ok",
        "username": username,
        "subscription_id": sub_id,
        "subscription_url": f"https://{settings.get('general', {}).get('host', 'conn.zernmc.ru')}/sub/{sub_id}",
        "results": results,
        "summary": f"{success_count}/{total_count} инбаундов создано"
    })

@app.post("/admin/api/users/update")
async def update_user(request: Request, data: dict):
    if not check_admin(request):
        return JSONResponse({"error": "Unauthorized"}, status_code=401)
    logger.info(f"RAW data received: {data}")
    
    user_id = int(data.get("id", 0))
    tier = str(data.get("tier", "free"))
    tariff_days_remaining = int(data.get("tariff_days_remaining", 0) or 0)
    traffic_limit_gb = int(data.get("traffic_limit_gb", 0) or 0)
    is_active = 1 if data.get("is_active") in [True, "true", "on", "1", 1] else 0
    
    logger.info(f"Update user: id={user_id}, tier='{tier}', days={tariff_days_remaining}, traffic={traffic_limit_gb}, active={is_active}")
    
    conn = get_db()
    try:
        conn.execute("""
            UPDATE users SET tier = ?, tariff_days_remaining = ?, traffic_limit_gb = ?, is_active = ?
            WHERE id = ?
        """, (tier, tariff_days_remaining, traffic_limit_gb, is_active, user_id))
        conn.commit()
        
        updated = conn.execute("SELECT * FROM users WHERE id = ?", (user_id,)).fetchone()
        logger.info(f"After update DB: {dict(updated)}")
    finally:
        conn.close()
    
    return JSONResponse({"status": "ok"})

@app.post("/admin/api/users/delete")
async def delete_user(request: Request, data: dict):
    if not check_admin(request):
        return JSONResponse({"error": "Unauthorized"}, status_code=401)
    user_id = data.get("id")
    username = data.get("username", "")
    
    conn = get_db()
    try:
        user = conn.execute("SELECT subscription_id FROM users WHERE id = ?", (user_id,)).fetchone()
        if not user:
            return JSONResponse({"error": "user not found"}, status_code=404)
        
        sub_id = user["subscription_id"]
        
        for srv in servers:
            for inbound in srv.get("inbounds", []):
                result = delete_3xui_client(username, sub_id, inbound)
        
        conn.execute("DELETE FROM users WHERE id = ?", (user_id,))
        conn.commit()
    finally:
        conn.close()
    
    return JSONResponse({"status": "ok", "message": "User deleted from all servers"})

async def rotate_shortids():
    while True:
        try:
            rotation_hours = settings.get("shortid_rotation_hours", 11)
            await asyncio.sleep(rotation_hours * 3600)
            
            for srv in servers:
                for inbound in srv.get("inbounds", []):
                    api_host = inbound.get("api_host")
                    api_user = inbound.get("api_user")
                    api_pass = inbound.get("api_pass")
                    
                    if not all([api_host, api_user, api_pass]):
                        continue
                    
                    try:
                        api = Api(host=api_host, username=api_user, password=api_pass, use_tls_verify=False)
                        api.login()
                        
                        new_shortid = secrets.token_hex(4)
                        
                        inbounds = api.inbound.get_inbounds()
                        for ib in inbounds:
                            if ib.id == inbound.get("id"):
                                ib.shortid = new_shortid
                                api.inbound.update_inbound(ib)
                                logger.info(f"ShortID rotated for {srv['name']}/{inbound['name']}: {new_shortid}")
                                break
                    except Exception as e:
                        logger.error(f"ShortID rotation error {srv['name']}/{inbound['name']}: {e}")
        except Exception as e:
            logger.error(f"ShortID rotation error: {e}")
            await asyncio.sleep(3600)

def update_3xui_expiry(sub_id: str, days: int):
    """Обновляет expiry_time на всех 3x-UI серверах"""
    import time
    expiry_timestamp = int(time.time() + (days * 86400))
    
    for srv in servers:
        for inbound in srv.get("inbounds", []):
            api_host = inbound.get("api_host")
            api_user = inbound.get("api_user")
            api_pass = inbound.get("api_pass")
            inbound_id = inbound.get("id")
            
            if not all([api_host, api_user, api_pass, inbound_id]):
                continue
            
            try:
                api = Api(host=api_host, username=api_user, password=api_pass, use_tls_verify=False)
                api.login()
                
                inbounds = api.inbound.get_list()
                for ib in inbounds:
                    if ib.id == inbound_id and ib.client_stats:
                        for client in ib.client_stats:
                            if getattr(client, 'sub_id', '') == sub_id:
                                client.expiry_time = expiry_timestamp
                                api.client.update(client.uuid, client)
                                logger.info(f"Updated expiry for {srv['name']}/{inbound['name']}: {days} days")
                                break
            except Exception as e:
                logger.error(f"Error updating expiry {srv['name']}/{inbound['name']}: {e}")

async def poll_donationalerts():
    global last_donation_id
    while True:
        try:
            da_config = settings.get("payments", {}).get("donationalerts", {})
            if not da_config.get("enabled"):
                await asyncio.sleep(300)
                continue
            
            api_token = da_config.get("api_token", "")
            if not api_token:
                logger.warning("DonationAlerts API token not configured")
                await asyncio.sleep(300)
                continue
            
            interval = da_config.get("check_interval_minutes", 5)
            await asyncio.sleep(interval * 60)
            
            async with httpx.AsyncClient(timeout=30.0) as client:
                resp = await client.get(
                    "https://www.donationalerts.com/api/v1/alerts/donations",
                    headers={"Authorization": f"Bearer {api_token}"}
                )
                
                if resp.status_code != 200:
                    logger.error(f"DA API error: {resp.status_code}")
                    continue
                
                data = resp.json()
                donations = data.get("data", [])
                
                for donation in reversed(donations):
                    donation_id = donation.get("id")
                    if donation_id <= last_donation_id:
                        continue
                    
                    amount = donation.get("amount", 0)
                    username = donation.get("username", "")
                    message = donation.get("message", "")
                    
                    tiers_config = settings.get("tiers", {})
                    
                    tier = None
                    days = 0
                    
                    for tier_name, tier_data in tiers_config.items():
                        prices = tier_data.get("prices", {})
                        tier_days = tier_data.get("days", {})
                        for price_key, price_val in prices.items():
                            if amount == price_val:
                                tier = tier_name
                                days = tier_days.get(price_key, 30)
                                break
                        if tier:
                            break
                    
                    if not tier:
                        logger.info(f"DA: ignoring amount {amount} RUB (not in config)")
                        last_donation_id = donation_id
                        continue
                    
                    user = None
                    message_parts = message.split() if message else []
                    
                    conn = get_db()
                    try:
                        for part in message_parts:
                            if part.isdigit():
                                user = conn.execute("SELECT * FROM users WHERE id = ?", (int(part),)).fetchone()
                            if not user:
                                user = conn.execute("SELECT * FROM users WHERE username = ? COLLATE NOCASE", (part,)).fetchone()
                            if user:
                                break
                        
                        if not user and username:
                            user = conn.execute("SELECT * FROM users WHERE username = ? COLLATE NOCASE", (username,)).fetchone()
                        
                        if user:
                            current_expiry = user.get("tariff_days_remaining", 0)
                            if current_expiry > 0:
                                new_expiry = current_expiry + days
                            else:
                                new_expiry = days
                            
                            conn.execute("""
                                UPDATE users SET 
                                    tier = ?,
                                    tariff_days_bought = tariff_days_bought + ?,
                                    tariff_days_remaining = ?,
                                    total_paid_rubles = total_paid_rubles + ?
                                WHERE id = ?
                            """, (tier, days, new_expiry, amount, user["id"]))
                            conn.commit()
                            
                            sub_id = user["subscription_id"]
                            update_3xui_expiry(sub_id, days)
                            
                            logger.info(f"VPN payment: {username} paid {amount} RUB, tier={tier}, +{days} days")
                    finally:
                        conn.close()
                    
                    last_donation_id = donation_id
                    
        except Exception as e:
            logger.error(f"DonationAlerts polling error: {e}")
            await asyncio.sleep(300)

@app.get("/health")
async def health():
    return {"status": "ok", "servers": len(servers), "settings_loaded": bool(settings)}

@app.post("/admin/api/reload")
async def reload_configs(request: Request):
    if not check_admin(request):
        return JSONResponse({"error": "Unauthorized"}, status_code=401)
    load_configs()
    clear_cache()
    return {"status": "ok"}

@app.get("/admin/api/rotate-shortids")
async def manual_rotate(request: Request):
    if not check_admin(request):
        return JSONResponse({"error": "Unauthorized"}, status_code=401)
    await rotate_shortids()
    return {"status": "ok"}

if __name__ == "__main__":
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    loop.create_task(rotate_shortids())
    loop.create_task(poll_donationalerts())
    uvicorn.run(app, host="0.0.0.0", port=8000, log_level="info")