#!/usr/bin/env python3
"""
HFOS - HuggingFace Operating System for Minecraft (v2.1)
Fixed iframe proxy routing, silenced backend logs, robust subprocess, and Repair tools.
"""

import os
import re
import sys
import json
import time
import hmac
import hashlib
import base64
import secrets
import shutil
import threading
import subprocess
from collections import deque

try:
    import psutil
    import httpx
    from flask import Flask, request, jsonify, Response
    from flask_cors import CORS
except ImportError:
    subprocess.check_call([sys.executable, "-m", "pip", "install", "flask", "flask-cors", "psutil", "httpx"])
    import psutil
    import httpx
    from flask import Flask, request, jsonify, Response
    from flask_cors import CORS

# -----------------------------------------------------------------------------
# OS Configuration
# -----------------------------------------------------------------------------
BASE_DIR = os.path.abspath(os.environ.get("SERVER_DIR", "/data"))
PLUGINS_DIR = os.path.join(BASE_DIR, "plugins")
JARS_DIR = os.path.join(BASE_DIR, "jars")
CONFIG_PATH = os.path.join(BASE_DIR, "hfos_config.json")
SECRET_PATH = os.path.join(BASE_DIR, ".hfos_secret")

for d in (BASE_DIR, PLUGINS_DIR, JARS_DIR):
    os.makedirs(d, exist_ok=True)

DEFAULT_JVM = (
    "-XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 "
    "-XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch "
    "-XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M "
    "-XX:G1ReservePercent=20 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 "
    "-XX:G1MixedGCLiveThresholdPercent=90 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem "
    "-XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=https://mcflags.emc.gs "
    "-Dterminal.jline=false -Dterminal.ansi=true -Dfile.encoding=UTF-8"
)

cfg_lock = threading.Lock()

def load_config() -> dict:
    c = {
        "provider": "purpur",
        "version": "latest",
        "jar": "",
        "memory": "6G",
        "auto_start": True,
        "jvm": DEFAULT_JVM,
    }
    with cfg_lock:
        if os.path.exists(CONFIG_PATH):
            try:
                c.update(json.load(open(CONFIG_PATH, "r", encoding="utf-8")))
            except Exception: pass
    return c

def save_config(c: dict):
    with cfg_lock:
        try:
            json.dump(c, open(CONFIG_PATH, "w", encoding="utf-8"), indent=2)
        except Exception: pass

# -----------------------------------------------------------------------------
# Security & Auth Engine
# -----------------------------------------------------------------------------
def get_secret() -> str:
    if not os.path.exists(SECRET_PATH):
        open(SECRET_PATH, "w").write(secrets.token_hex(32))
    return open(SECRET_PATH, "r").read().strip()

def get_admin_pass() -> str:
    return os.environ.get("PASS", "").strip() or "admin"

def gen_token() -> str:
    payload = f"{secrets.token_hex(8)}:{int(time.time()) + 86400}"
    sig = hmac.new(get_secret().encode(), payload.encode(), hashlib.sha256).digest()
    return f"{base64.urlsafe_b64encode(payload.encode()).decode().rstrip('=')}.{base64.urlsafe_b64encode(sig).decode().rstrip('=')}"

def verify_token(t: str) -> bool:
    if not t or "." not in t: return False
    try:
        p_b64, s_b64 = t.split(".")
        p_b64 += "=" * (-len(p_b64) % 4); s_b64 += "=" * (-len(s_b64) % 4)
        payload = base64.urlsafe_b64decode(p_b64).decode()
        if time.time() > int(payload.split(":")[1]): return False
        expected = hmac.new(get_secret().encode(), payload.encode(), hashlib.sha256).digest()
        return hmac.compare_digest(base64.urlsafe_b64decode(s_b64), expected)
    except Exception: return False

def check_auth():
    auth = request.headers.get("Authorization", "").replace("Bearer ", "")
    if not verify_token(auth):
        return jsonify({"error": "Unauthorized"}), 401

def safe_path(p: str) -> str:
    rp = os.path.abspath(os.path.join(BASE_DIR, (p or "").lstrip("/")))
    if not rp.startswith(BASE_DIR): raise PermissionError("Path traversal blocked")
    return rp

# -----------------------------------------------------------------------------
# Core Server Engine
# -----------------------------------------------------------------------------
class ServerEngine:
    def __init__(self):
        self.proc = None
        self.lock = threading.Lock()
        self.lines = deque(maxlen=2000)
        self.after_count = 0
        self.start_time = 0
        self.players = set()
        self.active_version = "Unknown"

    def log(self, msg: str):
        with self.lock:
            self.lines.append(msg)
            self.after_count += 1
            # Deliberately NOT using print(msg) here to prevent HuggingFace backend log flooding.

    def download_jar(self, provider: str, version: str) -> str:
        self.log(f"[HFOS] Fetching {provider} version {version}...")
        headers = {"User-Agent": "HFOS/2.1"}
        
        if version == "latest":
            if provider == "purpur":
                r = httpx.get("https://api.purpurmc.org/v2/purpur", headers=headers, timeout=15)
                version = r.json()["versions"][-1]
            elif provider == "paper":
                r = httpx.get("https://api.papermc.io/v2/projects/paper", headers=headers, timeout=15)
                version = r.json()["versions"][-1]

        jar_name = f"{provider}-{version}.jar"
        jar_path = os.path.join(JARS_DIR, jar_name)

        if os.path.exists(jar_path):
            self.log(f"[HFOS] Jar {jar_name} already exists. Skipping download.")
            return jar_name

        self.log(f"[HFOS] Downloading {jar_name} (This may take a moment)...")
        if provider == "purpur":
            url = f"https://api.purpurmc.org/v2/purpur/{version}/latest/download"
        else:
            r = httpx.get(f"https://api.papermc.io/v2/projects/paper/versions/{version}", headers=headers).json()
            build = r["builds"][-1]
            r2 = httpx.get(f"https://api.papermc.io/v2/projects/paper/versions/{version}/builds/{build}", headers=headers).json()
            dl_name = r2["downloads"]["application"]["name"]
            url = f"https://api.papermc.io/v2/projects/paper/versions/{version}/builds/{build}/downloads/{dl_name}"

        with httpx.stream("GET", url, headers=headers, follow_redirects=True) as r:
            r.raise_for_status()
            with open(jar_path, "wb") as f:
                for chunk in r.iter_bytes(8192): f.write(chunk)
        
        self.log(f"[HFOS] Successfully downloaded {jar_name}.")
        return jar_name

    def preflight_check(self):
        c = load_config()
        if not c.get("jar") or not os.path.exists(os.path.join(JARS_DIR, c.get("jar", ""))):
            self.log("[HFOS] No valid Jar found. Auto-provisioning started...")
            try:
                jar = self.download_jar(c["provider"], c["version"])
                c["jar"] = jar
                save_config(c)
            except Exception as e:
                self.log(f"[HFOS Error] Auto-provisioning failed: {e}")
                return False

        with open(os.path.join(BASE_DIR, "eula.txt"), "w") as f: f.write("eula=true\n")
        
        sp = os.path.join(BASE_DIR, "server.properties")
        if not os.path.exists(sp):
            with open(sp, "w") as f:
                f.write("server-port=25565\nonline-mode=false\nmotd=Hosted on HFOS\nmax-players=50\n")
        return True

    def _reader(self):
        # text=True in Popen removes the need to decode and avoids buffer warnings
        for line in iter(self.proc.stdout.readline, ""):
            if not line: break
            clean_line = line.rstrip()
            self.log(clean_line)
            
            low = clean_line.lower()
            v_match = re.search(r"starting minecraft server version\s+([\d.]+)", low)
            if v_match: self.active_version = v_match.group(1)
            
            p_match = re.search(r"\s(\S+)\s+(joined|left) the game", low)
            if p_match:
                if p_match.group(2) == "joined": self.players.add(p_match.group(1))
                else: self.players.discard(p_match.group(1))

    def start(self):
        if self.proc and self.proc.poll() is None: return "Running"
        if not self.preflight_check(): return "Failed Preflight"

        c = load_config()
        jar_path = os.path.join(JARS_DIR, c["jar"])
        
        # Uses standard Java 25 installed natively from the Dockerfile
        cmd = ["java", f"-Xmx{c['memory']}", f"-Xms{c['memory']}"] + c["jvm"].split() + ["-jar", jar_path, "--nogui"]
        self.log(f"[HFOS] Launching Engine: {' '.join(cmd)}")
        self.players.clear()
        self.start_time = time.time()
        
        # Using text=True prevents the runtime buffer warnings
        self.proc = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, cwd=BASE_DIR, text=True, bufsize=1)
        threading.Thread(target=self._reader, daemon=True).start()
        return "Started"

    def stop(self):
        if not self.proc or self.proc.poll() is not None: return
        self.log("[HFOS] Sending gracefully stop...")
        try:
            self.proc.stdin.write("stop\n"); self.proc.stdin.flush()
            self.proc.wait(15)
        except Exception:
            self.proc.kill()
        self.players.clear()

    def send(self, cmd: str):
        if self.proc and self.proc.poll() is None:
            self.proc.stdin.write(cmd.strip() + "\n"); self.proc.stdin.flush()
            self.log(f"> {cmd}")

engine = ServerEngine()

def autostart_worker():
    time.sleep(2)
    if load_config().get("auto_start", True):
        engine.start()

threading.Thread(target=autostart_worker, daemon=True).start()

# -----------------------------------------------------------------------------
# Web Application (Flask + API)
# -----------------------------------------------------------------------------
app = Flask(__name__)
CORS(app)
app.config["MAX_CONTENT_LENGTH"] = 2 * 1024 * 1024 * 1024

@app.route("/")
def index():
    return Response(UI_HTML, mimetype="text/html")

@app.post("/api/auth")
def auth():
    provided_pass = request.form.get("pass", "")
    if hmac.compare_digest(provided_pass, get_admin_pass()):
        return jsonify({"token": gen_token()})
    return jsonify({"error": "Invalid password"}), 401

@app.before_request
def check_requests():
    if request.path.startswith("/api/") and request.path != "/api/auth":
        return check_auth()

@app.get("/api/status")
def status():
    running = engine.proc is not None and engine.proc.poll() is None
    mem = psutil.virtual_memory()
    c = load_config()
    return jsonify({
        "running": running,
        "uptime": int(time.time() - engine.start_time) if running else 0,
        "players": list(engine.players),
        "version": engine.active_version if running else c.get("version"),
        "cpu": psutil.cpu_percent(),
        "ram_used": mem.used,
        "ram_total": mem.total,
        "jar": c.get("jar")
    })

@app.post("/api/power")
def power():
    act = request.form.get("action")
    if act == "start": engine.start()
    elif act == "stop": threading.Thread(target=engine.stop).start()
    elif act == "kill":
        if engine.proc: engine.proc.kill()
    return jsonify({"ok": True})

@app.get("/api/console")
def console():
    after = int(request.args.get("after", 0))
    with engine.lock:
        lines = list(engine.lines)[max(0, after - engine.after_count + len(engine.lines)):]
        idx = engine.after_count
    return jsonify({"lines": lines, "after": idx})

@app.post("/api/console")
def console_send():
    engine.send(request.form.get("cmd", ""))
    return jsonify({"ok": True})

# System Repair Engine (Fixes corrupted library downloads)
@app.post("/api/system/repair")
def system_repair():
    if engine.proc and engine.proc.poll() is None:
        return jsonify({"error": "Server must be stopped before repairing."}), 400
    
    deleted_items = []
    # Delete cache and libraries to force fresh re-download
    for target in ["cache", "libraries", "versions"]:
        p = os.path.join(BASE_DIR, target)
        if os.path.exists(p):
            shutil.rmtree(p)
            deleted_items.append(target)
            
    engine.log(f"[HFOS System] Repaired environment by clearing: {', '.join(deleted_items)}")
    return jsonify({"ok": True, "msg": f"Cleared: {', '.join(deleted_items)}"})

# File System API
@app.get("/api/fs/list")
def fs_list():
    p = safe_path(request.args.get("path", ""))
    if not os.path.isdir(p): return jsonify([])
    items = []
    for f in os.listdir(p):
        fp = os.path.join(p, f)
        is_dir = os.path.isdir(fp)
        items.append({
            "name": f, "is_dir": is_dir,
            "size": 0 if is_dir else os.path.getsize(fp),
            "date": os.path.getmtime(fp)
        })
    return jsonify(sorted(items, key=lambda x: (not x["is_dir"], x["name"].lower())))

@app.post("/api/fs/read")
def fs_read():
    p = safe_path(request.form.get("path", ""))
    try: return jsonify({"content": open(p, "r", encoding="utf-8").read()})
    except Exception as e: return jsonify({"error": str(e)}), 400

@app.post("/api/fs/write")
def fs_write():
    p = safe_path(request.form.get("path", ""))
    with open(p, "w", encoding="utf-8") as f: f.write(request.form.get("content", ""))
    return jsonify({"ok": True})

@app.post("/api/fs/delete")
def fs_delete():
    p = safe_path(request.form.get("path", ""))
    if os.path.isdir(p): shutil.rmtree(p)
    else: os.remove(p)
    return jsonify({"ok": True})

@app.post("/api/fs/upload")
def fs_upload():
    p = safe_path(request.form.get("path", ""))
    file = request.files.get("file")
    if file: file.save(os.path.join(p, file.filename))
    return jsonify({"ok": True})

# Config & Store APIs
@app.get("/api/config")
def get_config():
    return jsonify(load_config())

@app.post("/api/config")
def set_config():
    c = load_config()
    for k in c.keys():
        if k in request.form: c[k] = request.form[k]
    save_config(c)
    return jsonify({"ok": True})

@app.post("/api/plugins/install_url")
def plugins_install_url():
    url = request.form.get("url", "").strip()
    if not url: return jsonify({"error": "Empty URL provided."}), 400
    
    try:
        if url.endswith(".jar"):
            fname = url.split("/")[-1]
            dl_url = url
        elif "modrinth.com/" in url:
            match = re.search(r'modrinth\.com/(?:plugin|project)/([^/?#]+)', url)
            if not match: return jsonify({"error": "Invalid Modrinth URL format."}), 400
            slug = match.group(1)
            versions = httpx.get(f"https://api.modrinth.com/v2/project/{slug}/version", headers={"User-Agent":"HFOS/2.1"}).json()
            if not versions: return jsonify({"error": "No files found for this Modrinth project."}), 404
            
            file_info = versions[0]["files"][0]
            dl_url = file_info["url"]
            fname = file_info["filename"]
        else:
            return jsonify({"error": "Unsupported URL format."}), 400

        engine.log(f"[HFOS] Fetching plugin from: {dl_url}")
        with httpx.stream("GET", dl_url, follow_redirects=True, headers={"User-Agent":"HFOS/2.1"}) as r:
            r.raise_for_status()
            with open(os.path.join(PLUGINS_DIR, fname), "wb") as f:
                for chunk in r.iter_bytes(8192): f.write(chunk)
                
        engine.log(f"[HFOS] Installed plugin: {fname}")
        return jsonify({"ok": True, "file": fname})
    except Exception as e:
        return jsonify({"error": str(e)}), 500

# -----------------------------------------------------------------------------
# OS Frontend GUI (Mobile Responsive + Fixed Network Routing)
# -----------------------------------------------------------------------------
UI_HTML = """<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>HFOS - Mobile Native Controller</title>
<style>
:root{--bg:#0f172a;--bg2:#1e293b;--bg3:#334155;--bg4:#475569;--fg:#f8fafc;--mut:#94a3b8;--acc:#38bdf8;--acc-hov:#0ea5e9;--err:#ef4444;--succ:#22c55e;--warn:#f59e0b;--font:'Inter',system-ui,sans-serif;--mono:'JetBrains Mono',monospace;--rad:8px}
*{box-sizing:border-box;margin:0;padding:0;scrollbar-width:thin;scrollbar-color:var(--bg4) var(--bg2)}
body{background:var(--bg);color:var(--fg);font-family:var(--font);height:100vh;display:flex;flex-direction:column;overflow:hidden;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit;color:inherit;outline:none}
.btn{background:var(--bg3);border:1px solid var(--bg4);padding:10px 16px;border-radius:var(--rad);cursor:pointer;font-weight:500;transition:all .15s;display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:14px;white-space:nowrap}
.btn:hover{background:var(--bg4)}.btn.primary{background:var(--acc);color:#0f172a;border-color:var(--acc)}.btn.primary:hover{background:var(--acc-hov)}.btn.danger{background:transparent;color:var(--err);border-color:var(--err)}.btn.danger:hover{background:var(--err);color:#fff}.btn.warn{background:transparent;color:var(--warn);border-color:var(--warn)}.btn.warn:hover{background:var(--warn);color:#fff}
.input{background:var(--bg);border:1px solid var(--bg4);padding:10px 14px;border-radius:var(--rad);width:100%;font-size:14px}.input:focus{border-color:var(--acc)}
.auth-overlay{position:fixed;inset:0;background:rgba(15,23,42,0.95);backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:center;z-index:9999;padding:20px}
.auth-box{background:var(--bg2);padding:30px;border-radius:16px;width:100%;max-width:380px;border:1px solid var(--bg3);box-shadow:0 25px 50px -12px rgba(0,0,0,0.5)}
.auth-box h2{margin-bottom:10px;font-size:22px;font-weight:600}
.auth-box p{color:var(--mut);font-size:14px;margin-bottom:20px}

/* Mobile App Layout */
.mobile-header{display:none;background:var(--bg2);height:60px;align-items:center;padding:0 20px;border-bottom:1px solid var(--bg3);justify-content:space-between;z-index:900}
.hamburger{font-size:24px;background:none;border:none;color:var(--fg);cursor:pointer}
.app-layout{display:flex;flex:1;height:100%;overflow:hidden;position:relative}
.sidebar{width:250px;background:var(--bg2);border-right:1px solid var(--bg3);display:flex;flex-direction:column;transition:transform 0.3s ease;z-index:1000}
.brand{padding:20px;font-size:20px;font-weight:700;display:flex;align-items:center;gap:10px;color:var(--acc);border-bottom:1px solid var(--bg3)}
.nav{padding:15px;flex:1;overflow-y:auto}
.nav-item{padding:12px 15px;margin-bottom:5px;border-radius:var(--rad);cursor:pointer;font-size:15px;color:var(--mut);display:flex;align-items:center;gap:12px;transition:all .2s}
.nav-item:hover{background:var(--bg3);color:var(--fg)}.nav-item.active{background:var(--acc);color:#0f172a;font-weight:600}

.main{flex:1;display:flex;flex-direction:column;min-width:0;height:100%}
.topbar{height:70px;border-bottom:1px solid var(--bg3);display:flex;align-items:center;padding:0 25px;justify-content:space-between;background:var(--bg2)}
.status-badge{display:flex;align-items:center;gap:8px;background:var(--bg3);padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;border:1px solid var(--bg4)}
.dot{width:10px;height:10px;border-radius:50%;background:var(--mut)}.dot.on{background:var(--succ);box-shadow:0 0 10px var(--succ)}

.content{flex:1;overflow-y:auto;padding:25px;background:var(--bg);-webkit-overflow-scrolling:touch}

/* Responsive Grid */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:20px}
.card{background:var(--bg2);border:1px solid var(--bg3);border-radius:12px;padding:20px}
.card h3{font-size:14px;color:var(--mut);text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}
.card .val{font-size:32px;font-weight:700;font-family:var(--mono)}

/* Terminal */
.term-wrap{background:var(--bg2);border:1px solid var(--bg3);border-radius:12px;display:flex;flex-direction:column;height:calc(100vh - 150px)}
.term-body{flex:1;overflow-y:auto;padding:15px;font-family:var(--mono);font-size:13px;line-height:1.5;white-space:pre-wrap;word-break:break-all;color:#d1d5db}
.term-input{display:flex;padding:15px;border-top:1px solid var(--bg3);background:var(--bg);gap:10px}
.log-err{color:#fca5a5}.log-warn{color:#fde047}.log-hfos{color:var(--acc);font-weight:bold}

/* Files */
.file-list{background:var(--bg2);border:1px solid var(--bg3);border-radius:12px;overflow:hidden;overflow-x:auto}
.file-row{display:flex;align-items:center;padding:15px 20px;border-bottom:1px solid var(--bg3);font-size:14px;transition:background .15s;min-width:500px}
.file-row:hover{background:var(--bg3)}
.file-row:last-child{border:none}
.f-icon{width:35px;font-size:20px}.f-name{flex:1;cursor:pointer;font-weight:500}.f-size{width:100px;color:var(--mut);font-family:var(--mono);font-size:12px}.f-date{width:160px;color:var(--mut);font-size:12px}.f-acts{display:flex;gap:8px}
.path-bar{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:15px;background:var(--bg2);padding:15px;border-radius:12px;border:1px solid var(--bg3)}

/* Editor */
.modal{position:fixed;inset:0;background:rgba(0,0,0,0.8);display:none;align-items:center;justify-content:center;z-index:2000;padding:20px}
.modal-c{background:var(--bg2);width:100%;max-width:900px;height:85vh;border-radius:12px;display:flex;flex-direction:column;border:1px solid var(--bg3)}
.modal-h{padding:15px 20px;border-bottom:1px solid var(--bg3);display:flex;justify-content:space-between;align-items:center}
.modal-b{flex:1;padding:0}
.modal-b textarea{width:100%;height:100%;border:none;background:var(--bg);padding:20px;font-family:var(--mono);font-size:14px;resize:none;color:var(--fg)}

#toast{position:fixed;bottom:25px;right:25px;background:var(--bg3);color:var(--fg);padding:14px 24px;border-radius:8px;font-size:15px;box-shadow:0 10px 25px rgba(0,0,0,0.5);border:1px solid var(--bg4);transform:translateY(100px);opacity:0;transition:all .3s;z-index:9999;font-weight:500}
#toast.show{transform:translateY(0);opacity:1}

@media (max-width: 768px) {
  .mobile-header { display: flex; }
  .sidebar { position: absolute; left: 0; top: 0; bottom: 0; transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: 20px 0 50px rgba(0,0,0,0.5); }
  .topbar { display: none; }
  .content { padding: 15px; }
  .grid { grid-template-columns: 1fr; }
  .term-wrap { height: calc(100vh - 120px); }
  .file-row { padding: 12px 15px; }
  .path-bar { flex-direction: column; align-items: stretch; }
  #toast { left: 20px; right: 20px; text-align: center; bottom: 20px; }
}
</style>
</head>
<body>

<div id="toast"></div>

<!-- Mobile Nav Bar -->
<div class="mobile-header">
  <div style="font-weight:700;font-size:18px;color:var(--acc)">🚀 HFOS</div>
  <button class="hamburger" onclick="toggleSidebar()">☰</button>
</div>

<!-- Auth -->
<div class="auth-overlay" id="authScreen">
  <div class="auth-box">
    <h2>HFOS Secure Login</h2>
    <p>Enter your environment password.</p>
    <input type="password" id="passInp" class="input" placeholder="Password" style="margin-bottom:15px" onkeyup="if(event.key==='Enter')login()">
    <button class="btn primary" id="btnLogin" style="width:100%" onclick="login()">Authenticate</button>
    <p id="authErr" style="color:var(--err);font-size:13px;margin-top:12px;text-align:center;display:none;"></p>
  </div>
</div>

<!-- Editor -->
<div class="modal" id="editModal">
  <div class="modal-c">
    <div class="modal-h">
      <h3 id="editTitle" style="font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60%">Editing...</h3>
      <div style="display:flex;gap:10px">
        <button class="btn" onclick="document.getElementById('editModal').style.display='none'">Cancel</button> 
        <button class="btn primary" onclick="saveFile()">Save</button>
      </div>
    </div>
    <div class="modal-b"><textarea id="editArea" spellcheck="false"></textarea></div>
  </div>
</div>

<!-- Main App -->
<div class="app-layout" id="app" style="display:none">
  <!-- Sidebar Overlay for mobile -->
  <div id="sidebarOverlay" style="display:none;position:absolute;inset:0;background:rgba(0,0,0,0.5);z-index:999" onclick="toggleSidebar()"></div>
  
  <div class="sidebar" id="sidebar">
    <div class="brand">🚀 HFOS <span style="font-size:12px;color:var(--mut);margin-left:auto">v2.1</span></div>
    <div class="nav">
      <div class="nav-item active" onclick="nav('dash')">📊 Dashboard</div>
      <div class="nav-item" onclick="nav('term')">💻 Console</div>
      <div class="nav-item" onclick="nav('files')">📁 Files</div>
      <div class="nav-item" onclick="nav('plugins')">🧩 Add Plugin</div>
      <div class="nav-item" onclick="nav('settings')">⚙️ Settings</div>
    </div>
    <div style="padding:15px;border-top:1px solid var(--bg3)">
      <button class="btn danger" style="width:100%" onclick="logout()">Logout</button>
    </div>
  </div>
  
  <div class="main">
    <div class="topbar">
      <h2 id="viewTitle" style="font-size:20px;font-weight:600">Dashboard</h2>
      <div class="status-badge"><div class="dot" id="sDot"></div><span id="sTxt">Unknown</span></div>
    </div>
    <div class="content" id="cArea"></div>
  </div>
</div>

<script>
let tk = localStorage.getItem('hfos_tk') || '';
let view = 'dash', currentPath = '', editFile = '';
let cAfter = 0;
let tStatus, tTerm;

// CRITICAL FIX: Relative routing for HuggingFace Space Proxies
const API_BASE = window.location.pathname.replace(/\\/$/, '') + '/api';

const req = async (path, opt={}) => {
  opt.headers = opt.headers || {};
  opt.headers['Authorization'] = 'Bearer ' + tk;
  const r = await fetch(API_BASE + path, opt);
  if(r.status === 401) { localStorage.removeItem('hfos_tk'); location.reload(); }
  return r;
};

const showToast = msg => {
  const t = document.getElementById('toast');
  t.textContent = msg; t.classList.add('show');
  setTimeout(() => t.classList.remove('show'), 3000);
};

const toggleSidebar = () => {
  const sb = document.getElementById('sidebar');
  const ov = document.getElementById('sidebarOverlay');
  const isOpen = sb.classList.contains('open');
  if(isOpen) { sb.classList.remove('open'); ov.style.display = 'none'; }
  else { sb.classList.add('open'); ov.style.display = 'block'; }
};

const login = async () => {
  const btn = document.getElementById('btnLogin');
  const err = document.getElementById('authErr');
  const pwd = document.getElementById('passInp').value;
  
  btn.innerText = 'Authenticating...';
  btn.disabled = true;
  err.style.display = 'none';
  
  try {
    const fd = new FormData(); fd.append('pass', pwd);
    // Use relative path routing
    const r = await fetch(API_BASE + '/auth', {method:'POST', body:fd});
    const d = await r.json();
    if(d.token) { 
      tk = d.token; 
      localStorage.setItem('hfos_tk', tk); 
      init(); 
    } else { 
      err.innerText = d.error || 'Access Denied';
      err.style.display = 'block';
    }
  } catch(e) {
    err.innerText = 'Network error. Are you on a HuggingFace proxy?';
    err.style.display = 'block';
  }
  
  btn.innerText = 'Authenticate';
  btn.disabled = false;
};

const logout = () => { localStorage.removeItem('hfos_tk'); location.reload(); };

const formatSize = b => {
  if(b===0)return '0 B'; const k=1024, s=['B','KB','MB','GB'], i=Math.floor(Math.log(b)/Math.log(k));
  return parseFloat((b/Math.pow(k,i)).toFixed(1))+' '+s[i];
};

const formatDate = ts => new Date(ts*1000).toLocaleString(undefined, {month:'short', day:'numeric', hour:'2-digit', minute:'2-digit'});

const init = () => {
  document.getElementById('authScreen').style.display = 'none';
  document.getElementById('app').style.display = 'flex';
  nav('dash');
  setInterval(pollStatus, 3000); pollStatus();
};

const pollStatus = async () => {
  try {
    const r = await req('/status'); const d = await r.json();
    document.getElementById('sDot').className = 'dot ' + (d.running ? 'on' : '');
    document.getElementById('sTxt').textContent = d.running ? 'Online' : 'Offline';
    
    if(view === 'dash') {
      const mem = Math.round(d.ram_used/1024/1024/1024 * 10)/10;
      const total = Math.round(d.ram_total/1024/1024/1024 * 10)/10;
      document.getElementById('cArea').innerHTML = `
        <div style="display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px">
          <button class="btn primary" style="flex:1;min-width:140px" onclick="power('start')">▶ Start</button>
          <button class="btn" style="flex:1;min-width:140px" onclick="power('stop')">⏹ Stop</button>
          <button class="btn danger" style="flex:1;min-width:140px" onclick="power('kill')">⚡ Kill</button>
        </div>
        <div class="grid">
          <div class="card"><h3>CPU Usage</h3><div class="val">${d.cpu}%</div></div>
          <div class="card"><h3>Memory</h3><div class="val">${mem} / ${total} GB</div></div>
          <div class="card"><h3>Players</h3><div class="val">${d.players.length}</div></div>
          <div class="card"><h3>Active Engine</h3><div class="val" style="font-size:22px">${d.version||'Booting...'}</div></div>
        </div>
        <div class="card">
          <h3>Storage Persistent Volume</h3>
          <p style="color:var(--mut);font-size:14px;margin-top:5px;line-height:1.5">
            HFOS v2.1 saves all server data directly to your HuggingFace Space Persistent Storage Drive.<br>
            <span style="color:var(--succ);font-weight:600">✓ Real-time disk writing active.</span>
          </p>
        </div>`;
    }
  } catch(e) {}
};

const power = async (act) => {
  const fd = new FormData(); fd.append('action', act);
  await req('/power', {method:'POST', body:fd}); showToast('Signal sent: ' + act);
  pollStatus();
};

const nav = (v) => {
  view = v;
  if(window.innerWidth <= 768) toggleSidebar(); // auto close on mobile
  
  document.querySelectorAll('.nav-item').forEach(e => e.classList.toggle('active', e.textContent.toLowerCase().includes(v.replace('plugins','plugin'))));
  const c = document.getElementById('cArea');
  clearInterval(tTerm);
  
  let title = 'Dashboard';
  
  if(v === 'dash') { pollStatus(); }
  else if(v === 'term') {
    title = 'Server Console';
    c.innerHTML = `<div class="term-wrap"><div class="term-body" id="tBody"></div><div class="term-input"><input class="input" id="tInp" placeholder="Execute command (e.g. op username)..." onkeyup="if(event.key==='Enter')sendCmd()"><button class="btn primary" onclick="sendCmd()">Send</button></div></div>`;
    cAfter = 0; tTerm = setInterval(pollTerm, 1500); pollTerm();
  }
  else if(v === 'files') { title = 'File Manager'; loadFs(''); }
  else if(v === 'plugins') {
    title = 'Plugin Installer';
    c.innerHTML = `
      <div class="card" style="max-width:700px; margin:0 auto;">
        <h3 style="font-size:18px;color:var(--fg);margin-bottom:8px">URL-Based Installer</h3>
        <p style="color:var(--mut); font-size:14px; margin-bottom:20px; line-height:1.6">
          Paste the direct web link to any Modrinth plugin, or paste a direct <span style="font-family:var(--mono)">.jar</span> download link. HFOS will automatically resolve the file and place it in your <span style="font-family:var(--mono)">/plugins</span> directory.
        </p>
        
        <label style="display:block;margin-bottom:8px;font-size:13px;color:var(--mut);font-weight:600">MODRINTH URL OR DIRECT JAR LINK</label>
        <input class="input" id="pUrl" placeholder="e.g. https://modrinth.com/plugin/essentialsx" style="margin-bottom:15px;padding:12px;font-size:15px">
        
        <button class="btn primary" id="pBtn" onclick="installPluginFromUrl()" style="width:100%;padding:12px;font-size:16px">Download & Install Plugin</button>
      </div>`;
  }
  else if(v === 'settings') {
    title = 'System Configuration';
    req('/config').then(r=>r.json()).then(d => {
      c.innerHTML = `
        <div class="card" style="max-width:600px;margin:0 auto;margin-bottom:20px">
          <div style="margin-bottom:20px"><label style="display:block;margin-bottom:8px;font-size:13px;font-weight:600;color:var(--mut)">Server Engine</label>
          <select class="input" id="cfgProv"><option value="purpur" ${d.provider==='purpur'?'selected':''}>Purpur (Recommended)</option><option value="paper" ${d.provider==='paper'?'selected':''}>Paper</option></select></div>
          
          <div style="margin-bottom:20px"><label style="display:block;margin-bottom:8px;font-size:13px;font-weight:600;color:var(--mut)">Minecraft Version</label>
          <input class="input" id="cfgVer" value="${d.version}" placeholder="e.g. 1.20.4 or latest"></div>
          
          <div style="margin-bottom:25px"><label style="display:block;margin-bottom:8px;font-size:13px;font-weight:600;color:var(--mut)">Allocated RAM (-Xmx)</label>
          <input class="input" id="cfgMem" value="${d.memory}"></div>
          
          <button class="btn primary" style="width:100%" onclick="saveCfg()">Save Configuration & Apply</button>
        </div>
        
        <div class="card" style="max-width:600px;margin:0 auto;border-color:rgba(245,158,11,0.3)">
          <h3 style="color:var(--warn)">Repair & Diagnostics</h3>
          <p style="color:var(--mut);font-size:13px;margin-bottom:15px;line-height:1.5">If your server crashed with a ZipException or corrupted library, click this button to wipe the cache. It forces Purpur to re-download the vanilla files safely.</p>
          <button class="btn warn" style="width:100%" onclick="repairSystem()">Clear Cache & Repair Jars</button>
        </div>`;
    });
  }
  
  document.getElementById('viewTitle').innerText = title;
  const mobTitle = document.querySelector('.mobile-header div');
  if(mobTitle) mobTitle.innerText = title;
};

const pollTerm = async () => {
  if(view !== 'term') return;
  try {
    const r = await req('/console?after='+cAfter); const d = await r.json();
    if(d.lines && d.lines.length > 0) {
      const tb = document.getElementById('tBody');
      d.lines.forEach(l => {
        const cls = l.includes('ERROR')?'log-err':l.includes('WARN')?'log-warn':l.includes('[HFOS]')?'log-hfos':'';
        tb.insertAdjacentHTML('beforeend', `<div class="${cls}">${l.replace(/</g,'&lt;')}</div>`);
      });
      cAfter = d.after; tb.scrollTop = tb.scrollHeight;
    }
  } catch(e) {}
};

const sendCmd = async () => {
  const i = document.getElementById('tInp');
  if(!i.value.trim()) return;
  const fd = new FormData(); fd.append('cmd', i.value);
  await req('/console', {method:'POST', body:fd});
  i.value = ''; pollTerm();
};

const loadFs = async (path) => {
  currentPath = path;
  const r = await req('/fs/list?path='+encodeURIComponent(path)); const files = await r.json();
  const c = document.getElementById('cArea');
  
  let html = `<div class="path-bar">
    <button class="btn" onclick="loadFs('')">🏠 Home</button>
    <span style="color:var(--mut);font-weight:500">/ ${path.replace(/\\/g, '/')}</span>
    <div style="flex:1"></div>
    <button class="btn primary" onclick="document.getElementById('fUp').click()">+ Upload File</button>
    <input type="file" id="fUp" style="display:none" onchange="uploadF(this)">
  </div><div class="file-list">`;
  
  if(path !== '') html += `<div class="file-row"><div class="f-icon">📁</div><div class="f-name" onclick="loadFs('${path.split('/').slice(0,-1).join('/')}')">Go Back ..</div></div>`;
  if(files.length === 0 && path === '') html += `<div style="padding:30px;text-align:center;color:var(--mut)">Directory is empty.</div>`;
  
  files.forEach(f => {
    const fp = path ? path + '/' + f.name : f.name;
    const isTxt = f.name.match(/\\.(txt|json|yml|yaml|properties|xml|log|sh)$/i);
    html += `
    <div class="file-row">
      <div class="f-icon">${f.is_dir?'📁':'📄'}</div>
      <div class="f-name" onclick="${f.is_dir ? `loadFs('${fp}')` : ''}">${f.name}</div>
      <div class="f-size">${formatSize(f.size)}</div>
      <div class="f-date">${formatDate(f.date)}</div>
      <div class="f-acts">
        ${!f.is_dir && isTxt ? `<button class="btn" onclick="openEdit('${fp}')">Edit</button>` : ''}
        <button class="btn danger" onclick="deleteF('${fp}')">Del</button>
      </div>
    </div>`;
  });
  html += `</div>`; c.innerHTML = html;
};

const deleteF = async (p) => {
  if(!confirm('Permanently delete ' + p + '?')) return;
  const fd = new FormData(); fd.append('path', p);
  await req('/fs/delete', {method:'POST', body:fd});
  loadFs(currentPath); showToast('Deleted ' + p);
};

const uploadF = async (inp) => {
  const f = inp.files[0]; if(!f) return;
  const fd = new FormData(); fd.append('path', currentPath); fd.append('file', f);
  showToast('Uploading...');
  await req('/fs/upload', {method:'POST', body:fd});
  loadFs(currentPath); showToast('Upload complete');
  inp.value = ''; // reset
};

const openEdit = async (p) => {
  const fd = new FormData(); fd.append('path', p);
  const r = await req('/fs/read', {method:'POST', body:fd}); const d = await r.json();
  if(d.error) return alert(d.error);
  editFile = p;
  document.getElementById('editTitle').innerText = 'Editing: ' + p.split('/').pop();
  document.getElementById('editArea').value = d.content;
  document.getElementById('editModal').style.display = 'flex';
};

const saveFile = async () => {
  const fd = new FormData(); fd.append('path', editFile); fd.append('content', document.getElementById('editArea').value);
  await req('/fs/write', {method:'POST', body:fd});
  document.getElementById('editModal').style.display = 'none'; showToast('File saved successfully.');
};

const installPluginFromUrl = async () => {
  const i = document.getElementById('pUrl');
  const b = document.getElementById('pBtn');
  const url = i.value.trim();
  if(!url) { showToast('Please enter a URL'); return; }
  
  b.innerText = 'Downloading & Installing...'; b.disabled = true;
  const fd = new FormData(); fd.append('url', url);
  
  try {
    const r = await req('/plugins/install_url', {method:'POST', body:fd});
    const d = await r.json();
    if(d.ok) {
      showToast('Installed: ' + d.file);
      i.value = '';
    } else {
      showToast('Error: ' + d.error);
    }
  } catch(e) {
    showToast('Network error occurred.');
  }
  b.innerText = 'Download & Install Plugin'; b.disabled = false;
};

const saveCfg = async () => {
  const fd = new FormData();
  fd.append('provider', document.getElementById('cfgProv').value);
  fd.append('version', document.getElementById('cfgVer').value);
  fd.append('memory', document.getElementById('cfgMem').value);
  await req('/config', {method:'POST', body:fd});
  showToast('Settings saved.');
};

const repairSystem = async () => {
  if(!confirm('This will wipe all cached MoJang libraries and force Purpur to re-download them. Ensure the server is stopped first. Continue?')) return;
  try {
    const r = await req('/system/repair', {method:'POST'});
    const d = await r.json();
    if(d.ok) showToast(d.msg);
    else showToast('Error: ' + d.error);
  } catch(e) { showToast('Repair failed.'); }
};

if(tk) init();
</script>
</body>
</html>"""

if __name__ == "__main__":
    port = int(os.environ.get("PORT", 7860))
    app.run(host="0.0.0.0", port=port, threaded=True)