openswarm/backend/apps/tools_lib/tools_lib.py

import asyncio
import hashlib
import json
import os
import re
import logging
import secrets
import shutil
import sys
import time
from contextlib import asynccontextmanager
from typing import Any, Optional
from urllib.parse import urlencode

import httpx
from dotenv import load_dotenv
from fastapi import HTTPException, Query
from fastapi.responses import HTMLResponse
from backend.config.Apps import SubApp
from backend.apps.tools_lib.models import ToolDefinition, ToolCreate, ToolUpdate, BUILTIN_TOOLS

logger = logging.getLogger(__name__)

# Default Google OAuth credentials for the OpenSwarm project.
# These are public credentials for a desktop/web OAuth client (safe to embed per Google's docs).
# Users can override via GOOGLE_OAUTH_CLIENT_ID / GOOGLE_OAUTH_CLIENT_SECRET env vars.
_DEFAULT_GOOGLE_CLIENT_ID = "6741219524-8vpt07arcc5rvkdb4j1b6v9g53469ugq.apps.googleusercontent.com"
_DEFAULT_GOOGLE_CLIENT_SECRET = "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"
os.environ.setdefault("GOOGLE_OAUTH_CLIENT_ID", _DEFAULT_GOOGLE_CLIENT_ID)
os.environ.setdefault("GOOGLE_OAUTH_CLIENT_SECRET", _DEFAULT_GOOGLE_CLIENT_SECRET)

from backend.config.paths import BACKEND_DIR, DATA_ROOT, TOOLS_DIR as DATA_DIR, BUILTIN_PERMISSIONS_PATH as BUILTIN_PERMS_PATH

load_dotenv(os.path.join(BACKEND_DIR, ".env"))
if os.environ.get("OPENSWARM_PACKAGED") == "1":
    load_dotenv(os.path.join(os.path.dirname(DATA_ROOT), ".env"), override=True)


@asynccontextmanager
async def tools_lib_lifespan():
    os.makedirs(DATA_DIR, exist_ok=True)
    yield


tools_lib = SubApp("tools", tools_lib_lifespan)

GOOGLE_AUTH_URL = "https://accounts.google.com/o/oauth2/v2/auth"
GOOGLE_TOKEN_URL = "https://oauth2.googleapis.com/token"
GOOGLE_USERINFO_URL = "https://www.googleapis.com/oauth2/v2/userinfo"
GOOGLE_SCOPES = [
    "openid",
    "https://www.googleapis.com/auth/userinfo.email",
    "https://www.googleapis.com/auth/gmail.modify",
    "https://www.googleapis.com/auth/calendar",
    "https://www.googleapis.com/auth/drive",
    "https://www.googleapis.com/auth/contacts.readonly",
]

AIRTABLE_AUTH_URL = "https://airtable.com/oauth2/v1/authorize"
AIRTABLE_TOKEN_URL = "https://airtable.com/oauth2/v1/token"
AIRTABLE_SCOPES = [
    "data.records:read", "data.records:write",
    "data.recordComments:read", "data.recordComments:write",
    "schema.bases:read", "schema.bases:write",
    "user.email:read",
]

HUBSPOT_AUTH_URL = "https://mcp-na2.hubspot.com/oauth/authorize/user"
HUBSPOT_TOKEN_URL = "https://api.hubapi.com/oauth/v1/token"

DISCORD_AUTH_URL = "https://discord.com/oauth2/authorize"
DISCORD_TOKEN_URL = "https://discord.com/api/oauth2/token"


# Maps state -> {tool_id, code_verifier (for PKCE flows)}
_pending_oauth: dict[str, dict] = {}


def _load_all() -> list[ToolDefinition]:
    result = []
    if not os.path.exists(DATA_DIR):
        return result
    for fname in os.listdir(DATA_DIR):
        if fname.endswith(".json"):
            with open(os.path.join(DATA_DIR, fname)) as f:
                result.append(ToolDefinition(**json.load(f)))
    return result


def _save(tool: ToolDefinition):
    with open(os.path.join(DATA_DIR, f"{tool.id}.json"), "w") as f:
        json.dump(tool.model_dump(), f, indent=2)


def _load(tool_id: str) -> ToolDefinition:
    path = os.path.join(DATA_DIR, f"{tool_id}.json")
    if not os.path.exists(path):
        raise HTTPException(status_code=404, detail="Tool not found")
    with open(path) as f:
        return ToolDefinition(**json.load(f))


@tools_lib.router.get("/builtin")
async def list_builtin_tools():
    return {"tools": [t.model_dump() for t in BUILTIN_TOOLS]}


def load_builtin_permissions() -> dict[str, str]:
    if not os.path.exists(BUILTIN_PERMS_PATH):
        return {}
    with open(BUILTIN_PERMS_PATH) as f:
        return json.load(f)


def save_builtin_permissions(perms: dict[str, str]):
    os.makedirs(os.path.dirname(BUILTIN_PERMS_PATH), exist_ok=True)
    with open(BUILTIN_PERMS_PATH, "w") as f:
        json.dump(perms, f, indent=2)


@tools_lib.router.get("/builtin/permissions")
async def get_builtin_permissions():
    return {"permissions": load_builtin_permissions()}


@tools_lib.router.put("/builtin/permissions")
async def update_builtin_permissions(body: dict):
    valid_tools = {t.name for t in BUILTIN_TOOLS}
    valid_policies = {"always_allow", "ask", "deny"}
    perms = load_builtin_permissions()
    for name, policy in body.get("permissions", {}).items():
        if name in valid_tools and policy in valid_policies:
            perms[name] = policy
    save_builtin_permissions(perms)
    return {"permissions": perms}


@tools_lib.router.get("/list")
async def list_tools():
    return {"tools": [t.model_dump() for t in _load_all()]}


@tools_lib.router.get("/oauth/callback")
async def oauth_callback(code: str = Query(...), state: str = Query("")):
    pending = _pending_oauth.pop(state, None)
    if not pending:
        return HTMLResponse("<html><body><h2>Invalid OAuth state</h2></body></html>", status_code=400)

    tool_id = pending if isinstance(pending, str) else pending["tool_id"]
    code_verifier = pending.get("code_verifier") if isinstance(pending, dict) else None

    tool = _load(tool_id)
    _port = os.environ.get("OPENSWARM_PORT", "8324")
    redirect_uri = f"http://localhost:{_port}/api/tools/oauth/callback"

    if tool.name.lower() == "airtable":
        # Airtable OAuth: PKCE flow
        client_id = os.environ.get("AIRTABLE_OAUTH_CLIENT_ID", "")
        client_secret = os.environ.get("AIRTABLE_OAUTH_CLIENT_SECRET", "")
        import base64
        credentials = base64.b64encode(f"{client_id}:{client_secret}".encode()).decode()
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post(AIRTABLE_TOKEN_URL, data={
                "grant_type": "authorization_code",
                "code": code,
                "redirect_uri": redirect_uri,
                "code_verifier": code_verifier or "",
                "client_id": client_id,
            }, headers={
                "Authorization": f"Basic {credentials}",
                "Content-Type": "application/x-www-form-urlencoded",
            })

        if resp.status_code != 200:
            logger.warning(f"Airtable OAuth token exchange failed: {resp.text}")
            return HTMLResponse(f"<html><body><h2>Token exchange failed</h2><pre>{resp.text}</pre></body></html>", status_code=400)

        tokens = resp.json()
        tool.oauth_tokens = {
            "access_token": tokens.get("access_token", ""),
            "refresh_token": tokens.get("refresh_token", ""),
            "token_expiry": time.time() + tokens.get("expires_in", 7200),
        }
        tool.auth_type = "oauth2"
        tool.auth_status = "connected"
        tool.connected_account_email = "Airtable account"

    elif tool.name.lower() == "hubspot":
        # HubSpot OAuth 2.1: PKCE flow
        client_id = os.environ.get("HUBSPOT_OAUTH_CLIENT_ID", "")
        client_secret = os.environ.get("HUBSPOT_OAUTH_CLIENT_SECRET", "")
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post(HUBSPOT_TOKEN_URL, data={
                "grant_type": "authorization_code",
                "code": code,
                "redirect_uri": redirect_uri,
                "client_id": client_id,
                "client_secret": client_secret,
                "code_verifier": code_verifier or "",
            }, headers={
                "Content-Type": "application/x-www-form-urlencoded",
            })

        if resp.status_code != 200:
            logger.warning(f"HubSpot OAuth token exchange failed: {resp.text}")
            return HTMLResponse(f"<html><body><h2>Token exchange failed</h2><pre>{resp.text}</pre></body></html>", status_code=400)

        tokens = resp.json()
        tool.oauth_tokens = {
            "access_token": tokens.get("access_token", ""),
            "refresh_token": tokens.get("refresh_token", ""),
            "token_expiry": time.time() + tokens.get("expires_in", 1800),
        }
        tool.auth_type = "oauth2"
        tool.auth_status = "connected"
        tool.connected_account_email = "HubSpot account"

    elif tool.name.lower() == "discord":
        # Discord bot install OAuth: exchange code, capture guild_id of the
        # server the user added the bot to. Multiple connect calls APPEND
        # additional guild_ids so users can authorize multiple servers.
        client_id = os.environ.get("DISCORD_OAUTH_CLIENT_ID", "")
        client_secret = os.environ.get("DISCORD_OAUTH_CLIENT_SECRET", "")
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post(DISCORD_TOKEN_URL, data={
                "grant_type": "authorization_code",
                "code": code,
                "redirect_uri": redirect_uri,
                "client_id": client_id,
                "client_secret": client_secret,
            }, headers={
                "Content-Type": "application/x-www-form-urlencoded",
            })

        if resp.status_code != 200:
            logger.warning(f"Discord OAuth token exchange failed: {resp.text}")
            return HTMLResponse(f"<html><body><h2>Token exchange failed</h2><pre>{resp.text}</pre></body></html>", status_code=400)

        tokens = resp.json()
        guild = tokens.get("guild") or {}
        new_guild_id = guild.get("id", "")
        new_guild_name = guild.get("name", "")
        existing = tool.oauth_tokens.get("guilds") or []
        # Append unless this guild was already authorized
        if new_guild_id and not any(g.get("id") == new_guild_id for g in existing):
            existing.append({"id": new_guild_id, "name": new_guild_name})
        tool.oauth_tokens = {
            # Bot token lives in .env, NEVER stored on the tool. We only
            # track the list of authorized guilds for scope enforcement.
            "guilds": existing,
        }
        tool.auth_type = "oauth2"
        tool.auth_status = "connected"
        names = ", ".join(g.get("name", "") for g in existing if g.get("name"))
        tool.connected_account_email = f"{len(existing)} server{'s' if len(existing) != 1 else ''}" + (f" · {names}" if names else "")

    elif tool.name.lower() == "notion":
        # Notion OAuth: Basic auth with client_id:secret
        notion_client_id = os.environ.get("NOTION_OAUTH_CLIENT_ID", "")
        notion_client_secret = os.environ.get("NOTION_OAUTH_CLIENT_SECRET", "")
        import base64
        credentials = base64.b64encode(f"{notion_client_id}:{notion_client_secret}".encode()).decode()
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post("https://api.notion.com/v1/oauth/token", json={
                "grant_type": "authorization_code",
                "code": code,
                "redirect_uri": redirect_uri,
            }, headers={
                "Authorization": f"Basic {credentials}",
                "Content-Type": "application/json",
            })

        if resp.status_code != 200:
            logger.warning(f"Notion OAuth token exchange failed: {resp.text}")
            return HTMLResponse(f"<html><body><h2>Token exchange failed</h2><pre>{resp.text}</pre></body></html>", status_code=400)

        tokens = resp.json()
        tool.oauth_tokens = {
            "access_token": tokens.get("access_token", ""),
        }
        tool.auth_type = "oauth2"
        tool.auth_status = "connected"
        tool.connected_account_email = tokens.get("workspace_name", "Notion workspace")
    else:
        # Google OAuth
        client_id = os.environ.get("GOOGLE_OAUTH_CLIENT_ID", "")
        client_secret = os.environ.get("GOOGLE_OAUTH_CLIENT_SECRET", "")
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post(GOOGLE_TOKEN_URL, data={
                "code": code,
                "client_id": client_id,
                "client_secret": client_secret,
                "redirect_uri": redirect_uri,
                "grant_type": "authorization_code",
            })

        if resp.status_code != 200:
            logger.warning(f"OAuth token exchange failed: {resp.text}")
            return HTMLResponse(f"<html><body><h2>Token exchange failed</h2><pre>{resp.text}</pre></body></html>", status_code=400)

        tokens = resp.json()
        access_token = tokens.get("access_token", "")
        tool.oauth_tokens = {
            "access_token": access_token,
            "refresh_token": tokens.get("refresh_token", ""),
            "token_expiry": time.time() + tokens.get("expires_in", 3600),
        }
        tool.auth_type = "oauth2"
        tool.auth_status = "connected"

        if access_token:
            try:
                async with httpx.AsyncClient(timeout=10.0) as info_client:
                    info_resp = await info_client.get(
                        GOOGLE_USERINFO_URL,
                        headers={"Authorization": f"Bearer {access_token}"},
                    )
                if info_resp.status_code == 200:
                    tool.connected_account_email = info_resp.json().get("email")
            except Exception as e:
                logger.warning(f"Failed to fetch Google userinfo: {e}")

    _save(tool)

    return HTMLResponse("""
    <html><body>
    <h2 style="font-family:sans-serif;color:#22c55e">Connected successfully!</h2>
    <p style="font-family:sans-serif;color:#666">You can close this window.</p>
    <script>
      if (window.opener) window.opener.postMessage({type:'oauth_complete', tool_id:'""" + tool_id + """'}, '*');
      setTimeout(() => window.close(), 1500);
    </script>
    </body></html>
    """)


@tools_lib.router.get("/{tool_id}")
async def get_tool(tool_id: str):
    return _load(tool_id).model_dump()


@tools_lib.router.post("/create")
async def create_tool(body: ToolCreate):
    tool = ToolDefinition(
        name=body.name,
        description=body.description,
        command=body.command,
        mcp_config=body.mcp_config,
        credentials=body.credentials,
        auth_type=body.auth_type,
        auth_status=body.auth_status,
    )
    _save(tool)
    return {"ok": True, "tool": tool.model_dump()}


@tools_lib.router.put("/{tool_id}")
async def update_tool(tool_id: str, body: ToolUpdate):
    tool = _load(tool_id)
    for k, v in body.model_dump(exclude_none=True).items():
        setattr(tool, k, v)
    _save(tool)
    return {"ok": True, "tool": tool.model_dump()}


@tools_lib.router.delete("/{tool_id}")
async def delete_tool(tool_id: str):
    path = os.path.join(DATA_DIR, f"{tool_id}.json")
    if os.path.exists(path):
        os.remove(path)
    return {"ok": True}


# ---------------------------------------------------------------------------
# MCP config derivation
# ---------------------------------------------------------------------------

def _sanitize_server_name(name: str) -> str:
    """Convert a tool name into a valid MCP server identifier (alphanumeric + hyphens)."""
    return re.sub(r"[^a-z0-9]+", "-", name.lower()).strip("-")


def _extra_bin_dirs() -> list[str]:
    """Well-known user-local bin directories that may not be on PATH in packaged apps."""
    home = os.path.expanduser("~")
    # Bundled uv-bin (ships uvx for non-dev users)
    _backend = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
    dirs = [
        os.path.join(_backend, "uv-bin"),
        os.path.join(home, ".bun", "bin"),
        os.path.join(home, ".cargo", "bin"),
        os.path.join(home, ".local", "bin"),
        os.path.join(home, ".volta", "bin"),
        "/opt/homebrew/bin",
        "/usr/local/bin",
    ]
    # nvm: pick the newest installed node version
    nvm_node = os.path.join(home, ".nvm", "versions", "node")
    try:
        if os.path.isdir(nvm_node):
            versions = sorted(os.listdir(nvm_node), reverse=True)
            if versions:
                dirs.insert(0, os.path.join(nvm_node, versions[0], "bin"))
    except OSError:
        pass
    # fnm
    fnm_bin = os.path.join(home, "Library", "Application Support", "fnm", "aliases", "default", "bin")
    if os.path.isdir(fnm_bin):
        dirs.insert(0, fnm_bin)
    return dirs


def _resolve_command(command: str) -> str | None:
    """Find a command on PATH, falling back to common user-local bin directories
    and bundled binaries (uv-bin for uvx/uv)."""
    found = shutil.which(command)
    if found:
        return found
    # Windows binaries need an extension. shutil.which() handles PATHEXT for
    # PATH lookups, but we manually scan _extra_bin_dirs below — replicate
    # the suffix probing here so `uvx` finds `uvx.exe`, etc.
    if sys.platform == "win32":
        suffixes = [""] + os.environ.get("PATHEXT", ".COM;.EXE;.BAT;.CMD").lower().split(os.pathsep)
    else:
        suffixes = [""]
    def _probe(directory: str) -> str | None:
        for suffix in suffixes:
            candidate = os.path.join(directory, command + suffix)
            if os.path.isfile(candidate) and os.access(candidate, os.X_OK):
                return candidate
        return None
    for d in _extra_bin_dirs():
        hit = _probe(d)
        if hit:
            return hit
    # Check bundled uv-bin directory (ships uv/uvx for non-dev users)
    _backend = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
    return _probe(os.path.join(_backend, "uv-bin"))


def _augmented_path() -> str:
    """Return PATH with extra bin dirs prepended (for child process environments)."""
    extra = [d for d in _extra_bin_dirs() if os.path.isdir(d)]
    current = os.environ.get("PATH", "")
    seen: set[str] = set()
    parts: list[str] = []
    for p in extra + current.split(os.pathsep):
        if p and p not in seen:
            seen.add(p)
            parts.append(p)
    return os.pathsep.join(parts)


def derive_mcp_config(tool: ToolDefinition) -> Optional[dict]:
    """Build the claude_agent_sdk mcp_servers config entry for a tool.

    Returns None if the tool cannot be configured (e.g. missing data).
    """
    if not tool.mcp_config:
        return None

    config: dict = dict(tool.mcp_config)

    if tool.credentials:
        if config.get("type") in ("http", "sse"):
            headers = config.setdefault("headers", {})
            for key, val in tool.credentials.items():
                if key.lower() in ("authorization", "api_key", "api-key"):
                    headers.setdefault("Authorization", f"Bearer {val}")
        else:
            env = config.setdefault("env", {})
            env.update(tool.credentials)

    if tool.oauth_tokens.get("access_token"):
        if config.get("type") in ("http", "sse"):
            headers = config.setdefault("headers", {})
            headers["Authorization"] = f"Bearer {tool.oauth_tokens['access_token']}"
        else:
            env = config.setdefault("env", {})
            env["OAUTH_ACCESS_TOKEN"] = tool.oauth_tokens["access_token"]
            if tool.name.lower() == "notion":
                env["NOTION_TOKEN"] = tool.oauth_tokens["access_token"]
            if tool.name.lower() == "hubspot":
                env["PRIVATE_APP_ACCESS_TOKEN"] = tool.oauth_tokens["access_token"]
            if tool.oauth_tokens.get("refresh_token"):
                env["GOOGLE_WORKSPACE_REFRESH_TOKEN"] = tool.oauth_tokens["refresh_token"]
            client_id = os.environ.get("GOOGLE_OAUTH_CLIENT_ID", "")
            client_secret = os.environ.get("GOOGLE_OAUTH_CLIENT_SECRET", "")
            if client_id:
                env["GOOGLE_WORKSPACE_CLIENT_ID"] = client_id
            if client_secret:
                env["GOOGLE_WORKSPACE_CLIENT_SECRET"] = client_secret

    # Discord: bot token is loaded from .env at MCP launch time. It is NEVER
    # stored on the tool definition or exposed to the frontend. The tool only
    # tracks the list of authorized guild IDs (in oauth_tokens.guilds) which
    # are used by the agent system prompt to scope what the agent may access.
    if tool.name.lower() == "discord" and config.get("type") == "stdio":
        bot_token = os.environ.get("DISCORD_BOT_TOKEN", "")
        if bot_token:
            env = config.setdefault("env", {})
            env["DISCORD_TOKEN"] = bot_token

    # Microsoft 365 MCP: use a stable token cache path shared across process spawns
    if tool.name.lower() == "microsoft 365" and config.get("type") == "stdio":
        env = config.setdefault("env", {})
        cache_dir = os.path.join(os.path.expanduser("~"), ".openswarm")
        os.makedirs(cache_dir, exist_ok=True)
        env["MS365_MCP_TOKEN_CACHE_PATH"] = os.path.join(cache_dir, "ms365-token-cache.json")
        env["MS365_MCP_SELECTED_ACCOUNT_PATH"] = os.path.join(cache_dir, "ms365-selected-account.json")

    if config.get("type") == "stdio":
        if config.get("command"):
            # Check for bundled npm MCP servers — use Electron's Node.js instead of npx
            if config["command"] in ("npx", "bunx"):
                pkg_name = next((a for a in (config.get("args") or []) if not a.startswith("-")), None)
                if pkg_name:
                    _backend = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
                    electron_path = os.environ.get("OPENSWARM_ELECTRON_PATH")
                    # Check for single-file bundle first (e.g. reddit-mcp-buddy)
                    bundle_path = os.path.join(_backend, "mcp-bundles", f"{pkg_name}.js")
                    if os.path.isfile(bundle_path) and electron_path:
                        config["command"] = electron_path
                        config["args"] = [bundle_path]
                        config.setdefault("env", {})["ELECTRON_RUN_AS_NODE"] = "1"
                        logger.info(f"Using bundled MCP server for {pkg_name}")
                    else:
                        # Check for pre-installed npm package (works in both dev and packaged modes)
                        safe_dir = pkg_name.replace("/", "-").replace("@", "")
                        npm_dir = os.path.join(_backend, "npm-servers", safe_dir)
                        pkg_json_path = os.path.join(npm_dir, "node_modules", pkg_name, "package.json")
                        if os.path.isfile(pkg_json_path):
                            import json as _json
                            with open(pkg_json_path) as f:
                                pkg_meta = _json.load(f)
                            bin_field = pkg_meta.get("bin", {})
                            entry = list(bin_field.values())[0] if isinstance(bin_field, dict) else bin_field
                            node_cmd = electron_path or shutil.which("node")
                            if node_cmd:
                                config["command"] = node_cmd
                                config["args"] = [os.path.join(npm_dir, "node_modules", pkg_name, entry)]
                                if electron_path:
                                    config.setdefault("env", {})["ELECTRON_RUN_AS_NODE"] = "1"
                                logger.info(f"Using pre-installed npm MCP server for {pkg_name}")

            if not os.path.isabs(config.get("command", "")):
                resolved = _resolve_command(config["command"])
                if resolved:
                    config["command"] = resolved
                else:
                    logger.warning(f"Command '{config['command']}' not found on PATH or bundled directories")
        env = config.setdefault("env", {})
        env.setdefault("PATH", _augmented_path())
        env.setdefault("PYTHONPATH", "")
        # Point uv/uvx at our bundled Python — avoids macOS CLT popup on fresh Macs
        # and avoids downloading Python at runtime
        _is_packaged = os.environ.get("OPENSWARM_PACKAGED") == "1"
        _is_windows = sys.platform == "win32"
        if _is_packaged:
            _resources = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))))
            if _is_windows:
                _bundled_python = os.path.join(_resources, "python-env", "python.exe")
            else:
                _bundled_python = os.path.join(_resources, "python-env", "bin", "python3")
            if os.path.exists(_bundled_python):
                env.setdefault("UV_PYTHON", _bundled_python)
        else:
            _backend = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
            if _is_windows:
                _venv_python = os.path.join(_backend, ".venv", "Scripts", "python.exe")
            else:
                _venv_python = os.path.join(_backend, ".venv", "bin", "python3")
            if os.path.exists(_venv_python):
                env.setdefault("UV_PYTHON", _venv_python)

    return config


# ---------------------------------------------------------------------------
# OAuth2 flow for Google Workspace (and other OAuth providers)
# ---------------------------------------------------------------------------


# ---------------------------------------------------------------------------
# MCP tool discovery
# ---------------------------------------------------------------------------

_READ_PREFIXES = ("get", "list", "read", "search", "fetch", "find", "query", "count", "check", "describe", "show", "download", "browse", "analy", "explain")
_WRITE_PREFIXES = ("create", "write", "delete", "update", "send", "remove", "modify", "add", "set", "put", "post", "patch", "insert", "move", "copy", "rename", "archive", "trash", "publish", "approve", "reject")


_SERVICE_RULES: list[tuple[list[str], str, str]] = [
    # (keywords, service_name, group)
    # Google Workspace
    (["gmail"], "Gmail", "Google"),
    (["drive"], "Drive", "Google"),
    (["calendar", "event", "freebusy"], "Calendar", "Google"),
    (["spreadsheet", "sheet"], "Sheets", "Google"),
    (["doc", "paragraph", "table"], "Docs", "Google"),
    (["chat", "space", "reaction", "message"], "Chat", "Google"),
    (["form", "publish_settings"], "Forms", "Google"),
    (["presentation", "slide", "page"], "Slides", "Google"),
    (["task_list", "task"], "Tasks", "Google"),
    (["contact"], "Contacts", "Google"),
    (["script", "deployment", "version", "trigger"], "Apps Script", "Google"),
    (["search_custom", "search_engine"], "Search", "Google"),
    # YouTube
    (["transcript", "caption"], "Transcripts", "YouTube"),
    (["video_detail", "video_comment", "video_categor", "video_engagement"], "Videos", "YouTube"),
    (["search_video", "trending_video"], "Search", "YouTube"),
    (["channel_stat", "channel_top"], "Channels", "YouTube"),
    # Reddit (before Twitter so "search_reddit" etc. don't mis-match)
    (["subreddit"], "Subreddits", "Reddit"),
    (["search_reddit"], "Search", "Reddit"),
    (["post_detail"], "Posts", "Reddit"),
    (["user_analysis"], "Users", "Reddit"),
    (["reddit_explain"], "Reference", "Reddit"),
]


def _categorize_tool(name: str) -> str:
    lower = name.lower().replace("_", " ").replace("-", " ").strip()
    for word in lower.split():
        for prefix in _READ_PREFIXES:
            if word.startswith(prefix):
                return "read"
        for prefix in _WRITE_PREFIXES:
            if word.startswith(prefix):
                return "write"
    return "write"


def _extract_service(name: str) -> tuple[str, str]:
    """Extract the service and group from a tool name (e.g. 'search_gmail_messages' -> ('Gmail', 'Google'))."""
    lower = name.lower()
    for keywords, display, group in _SERVICE_RULES:
        for kw in keywords:
            if kw in lower:
                return display, group
    return "Other", ""


def _parse_sse_json(text: str) -> dict | None:
    """Extract JSON from an SSE response body (handles `data: {...}` lines)."""
    for line in text.splitlines():
        stripped = line.strip()
        if stripped.startswith("data:"):
            payload = stripped[len("data:"):].strip()
            if payload:
                try:
                    return json.loads(payload)
                except json.JSONDecodeError:
                    continue
    try:
        return json.loads(text)
    except json.JSONDecodeError:
        return None


async def _discover_mcp_tools_http(url: str, headers: dict | None = None) -> list[dict]:
    """Connect to a Streamable HTTP MCP server and call tools/list via JSON-RPC POST."""
    h = {
        "Content-Type": "application/json",
        "Accept": "application/json, text/event-stream",
        **(headers or {}),
    }
    async with httpx.AsyncClient(timeout=30.0) as client:
        init_resp = await client.post(url, headers=h, json={
            "jsonrpc": "2.0", "id": 1, "method": "initialize",
            "params": {"protocolVersion": "2025-03-26", "capabilities": {},
                       "clientInfo": {"name": "self-swarm", "version": "0.1.0"}},
        })
        if init_resp.status_code not in (200, 201):
            raise HTTPException(status_code=502, detail=f"MCP initialize failed: {init_resp.status_code}")

        session_id = init_resp.headers.get("mcp-session-id", "")
        if session_id:
            h["mcp-session-id"] = session_id

        await client.post(url, headers=h, json={
            "jsonrpc": "2.0", "method": "notifications/initialized",
        })

        list_resp = await client.post(url, headers=h, json={
            "jsonrpc": "2.0", "id": 2, "method": "tools/list", "params": {},
        })
        if list_resp.status_code not in (200, 201):
            raise HTTPException(status_code=502, detail=f"MCP tools/list failed: {list_resp.status_code}")

        ct = list_resp.headers.get("content-type", "")
        if "text/event-stream" in ct:
            data = _parse_sse_json(list_resp.text)
        else:
            data = list_resp.json()

        if not data:
            raise HTTPException(status_code=502, detail="Empty response from MCP server")

        tools_list = data.get("result", {}).get("tools", [])
        return [{"name": t.get("name", ""), "description": t.get("description", ""), "inputSchema": t.get("inputSchema")} for t in tools_list]


async def _discover_mcp_tools_sse(url: str, headers: dict | None = None) -> list[dict]:
    """Connect to a legacy SSE MCP server (GET event-stream + POST messages) and call tools/list."""
    from mcp.client.sse import sse_client
    from mcp import ClientSession
    from mcp.types import Implementation

    try:
        async with sse_client(
            url=url,
            headers=headers,
            timeout=30,
            sse_read_timeout=30,
        ) as (read_stream, write_stream):
            async with ClientSession(
                read_stream,
                write_stream,
                client_info=Implementation(name="self-swarm", version="0.1.0"),
            ) as session:
                await session.initialize()
                result = await session.list_tools()
                return [{"name": t.name, "description": t.description or "", "inputSchema": t.inputSchema if t.inputSchema else None} for t in result.tools]
    except BaseExceptionGroup as eg:
        first = eg.exceptions[0] if eg.exceptions else eg
        raise HTTPException(status_code=502, detail=f"SSE discovery failed: {first}") from first


_NPX_CACHE_RE = re.compile(r"_npx[/\\]([0-9a-f]{8,})[/\\]")


def _try_heal_npx_cache(stderr: str) -> str | None:
    """On `ERR_MODULE_NOT_FOUND` pointing into `~/.npm/_npx/<hash>/`, wipe that one dir.

    Why: interrupted npx installs leave a `package-lock.json` in the cache dir so
    subsequent spawns reuse a partially-extracted node_modules tree, which dies at
    import time. Scoped strictly to the extracted hash subdir — never touches
    anything outside `~/.npm/_npx/`.
    """
    if "ERR_MODULE_NOT_FOUND" not in stderr:
        return None
    m = _NPX_CACHE_RE.search(stderr)
    if not m:
        return None
    hash_ = m.group(1)
    cache_dir = os.path.join(os.path.expanduser("~"), ".npm", "_npx", hash_)
    if not os.path.isdir(cache_dir):
        return None
    logger.warning("Corrupted npx cache detected at %s; wiping and letting caller retry", cache_dir)
    shutil.rmtree(cache_dir, ignore_errors=True)
    return hash_


async def _discover_mcp_tools_stdio(command: str, args: list[str] | None = None, env: dict | None = None, _attempt: int = 0) -> list[dict]:
    """Spawn a stdio MCP server process and call tools/list via JSON-RPC over stdin/stdout.

    On the first attempt, a failure that looks like corrupted npx cache
    (`ERR_MODULE_NOT_FOUND` pointing into `~/.npm/_npx/<hash>/`) triggers one
    auto-heal + retry. No heal on `_attempt >= 1`.
    """
    cmd_path = _resolve_command(command)
    if not cmd_path:
        raise HTTPException(status_code=400, detail=f"Command '{command}' not found on PATH or common install locations")

    proc_env = {**os.environ, **(env or {}), "PATH": _augmented_path()}
    proc_env.pop("PYTHONPATH", None)

    proc = await asyncio.create_subprocess_exec(
        cmd_path, *(args or []),
        stdin=asyncio.subprocess.PIPE,
        stdout=asyncio.subprocess.PIPE,
        stderr=asyncio.subprocess.PIPE,
        env=proc_env,
        limit=10 * 1024 * 1024,  # 10 MB buffer for large tool lists
    )

    async def _send(msg: dict) -> None:
        line = json.dumps(msg) + "\n"
        proc.stdin.write(line.encode())
        await proc.stdin.drain()

    async def _recv() -> dict:
        """Read JSON-RPC responses, skipping notification lines (no 'id' field)."""
        while True:
            line = await asyncio.wait_for(proc.stdout.readline(), timeout=30.0)
            if not line:
                stderr_out = ""
                try:
                    stderr_out = (await asyncio.wait_for(proc.stderr.read(4096), timeout=2.0)).decode(errors="replace")
                except (asyncio.TimeoutError, Exception):
                    pass
                raise HTTPException(
                    status_code=502,
                    detail=f"MCP stdio process exited unexpectedly{': ' + stderr_out if stderr_out else ''}",
                )
            stripped = line.decode(errors="replace").strip()
            if not stripped:
                continue
            try:
                data = json.loads(stripped)
            except json.JSONDecodeError:
                continue
            if "id" in data:
                return data

    try:
        await _send({
            "jsonrpc": "2.0", "id": 1, "method": "initialize",
            "params": {
                "protocolVersion": "2025-03-26",
                "capabilities": {},
                "clientInfo": {"name": "self-swarm", "version": "0.1.0"},
            },
        })
        await _recv()

        await _send({"jsonrpc": "2.0", "method": "notifications/initialized"})

        await _send({"jsonrpc": "2.0", "id": 2, "method": "tools/list", "params": {}})
        data = await _recv()

        tools_list = data.get("result", {}).get("tools", [])
        return [{"name": t.get("name", ""), "description": t.get("description", ""), "inputSchema": t.get("inputSchema")} for t in tools_list]

    except HTTPException as e:
        if _attempt == 0 and _try_heal_npx_cache(str(e.detail) if e.detail is not None else ""):
            return await _discover_mcp_tools_stdio(command, args, env, _attempt=1)
        raise
    except asyncio.TimeoutError:
        raise HTTPException(status_code=504, detail="MCP stdio server timed out during discovery")
    finally:
        try:
            proc.stdin.close()
        except Exception:
            pass
        try:
            proc.terminate()
            await asyncio.wait_for(proc.wait(), timeout=5.0)
        except Exception:
            try:
                proc.kill()
            except Exception:
                pass


@tools_lib.router.post("/{tool_id}/discover")
async def discover_tools(tool_id: str):
    tool = _load(tool_id)

    if tool.auth_type == "oauth2" and tool.auth_status == "connected":
        if tool.oauth_tokens.get("refresh_token"):
            if tool.name.lower() == "airtable":
                refreshed = await refresh_airtable_token(tool)
            elif tool.name.lower() == "hubspot":
                refreshed = await refresh_hubspot_token(tool)
            else:
                refreshed = await refresh_google_token(tool)
            if not refreshed and tool.oauth_tokens.get("access_token"):
                expiry = tool.oauth_tokens.get("token_expiry", 0)
                if time.time() >= expiry - 60:
                    raise HTTPException(
                        status_code=502,
                        detail=f"OAuth token expired and refresh failed. Try reconnecting {tool.name}.",
                    )

    config = derive_mcp_config(tool)
    if not config:
        raise HTTPException(status_code=400, detail="Cannot derive MCP config for tool")

    transport = config.get("type", "")

    try:
        if transport == "stdio":
            command = config.get("command", "")
            if not command:
                raise HTTPException(status_code=400, detail="stdio transport requires a 'command' in MCP config")
            raw_tools = await _discover_mcp_tools_stdio(
                command=command,
                args=config.get("args"),
                env=config.get("env"),
            )
        elif transport in ("http", "sse") or config.get("url"):
            url = config.get("url", "")
            if not url:
                raise HTTPException(status_code=400, detail="HTTP/SSE transport requires a 'url' in MCP config")
            if transport == "sse":
                raw_tools = await _discover_mcp_tools_sse(url, config.get("headers"))
            else:
                try:
                    raw_tools = await _discover_mcp_tools_http(url, config.get("headers"))
                except HTTPException:
                    logger.info(f"Streamable HTTP failed for {tool.name}, retrying with SSE transport")
                    raw_tools = await _discover_mcp_tools_sse(url, config.get("headers"))
        else:
            raise HTTPException(status_code=400, detail=f"Unsupported MCP transport type: '{transport}'. Use 'stdio', 'http', or 'sse'.")
    except HTTPException:
        raise
    except Exception as e:
        msg = str(e).strip()
        if not msg:
            msg = type(e).__name__
        logger.warning(f"MCP tool discovery failed for {tool.name}: {msg}", exc_info=True)
        raise HTTPException(status_code=502, detail=f"Discovery failed: {msg}")

    services: dict[str, dict[str, list[str]]] = {}
    service_groups: dict[str, list[str]] = {}
    permissions: dict[str, Any] = {}

    for t in raw_tools:
        name = t["name"]
        cat = _categorize_tool(name)
        svc, group = _extract_service(name)
        if svc not in services:
            services[svc] = {"read": [], "write": []}
        services[svc][cat].append(name)
        permissions[name] = tool.tool_permissions.get(name, "ask")
        if group:
            service_groups.setdefault(group, [])
            if svc not in service_groups[group]:
                service_groups[group].append(svc)

    all_read = [n for s in services.values() for n in s["read"]]
    all_write = [n for s in services.values() for n in s["write"]]
    permissions["_categories"] = {"read": all_read, "write": all_write}
    permissions["_services"] = services
    permissions["_service_groups"] = service_groups
    permissions["_tool_descriptions"] = {t["name"]: t["description"] for t in raw_tools}
    permissions["_tool_schemas"] = {t["name"]: t.get("inputSchema") for t in raw_tools if t.get("inputSchema")}

    tool.tool_permissions = permissions
    _save(tool)

    return {"ok": True, "tool": tool.model_dump()}


# ---------------------------------------------------------------------------
# Microsoft 365 device-code login (runs in the backend, not the MCP server)
# ---------------------------------------------------------------------------

_m365_login_processes: dict[str, dict] = {}  # tool_id -> {proc, device_code, status, email}


def _m365_server_script() -> str:
    _backend = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
    return os.path.join(
        _backend, "npm-servers", "softeria-ms-365-mcp-server",
        "node_modules", "@softeria", "ms-365-mcp-server", "dist", "index.js",
    )


def _m365_cache_env() -> dict[str, str]:
    cache_dir = os.path.join(os.path.expanduser("~"), ".openswarm")
    os.makedirs(cache_dir, exist_ok=True)
    return {
        "MS365_MCP_TOKEN_CACHE_PATH": os.path.join(cache_dir, "ms365-token-cache.json"),
        "MS365_MCP_SELECTED_ACCOUNT_PATH": os.path.join(cache_dir, "ms365-selected-account.json"),
    }


@tools_lib.router.post("/{tool_id}/m365/device-login")
async def m365_device_login(tool_id: str):
    """Start a Microsoft 365 device-code login.

    Spawns the MCP server with --login in a long-lived subprocess.
    Returns the device code and URL for the user to authenticate.
    """
    import subprocess

    tool = _load(tool_id)
    script = _m365_server_script()
    if not os.path.isfile(script):
        raise HTTPException(status_code=500, detail="M365 MCP server not installed")

    node = shutil.which("node")
    electron = os.environ.get("OPENSWARM_ELECTRON_PATH")
    cmd = electron or node
    if not cmd:
        raise HTTPException(status_code=500, detail="No node/electron found")

    env = {**os.environ, **_m365_cache_env()}
    if electron:
        env["ELECTRON_RUN_AS_NODE"] = "1"

    # Kill any existing login process for this tool
    existing = _m365_login_processes.pop(tool_id, None)
    if existing and existing.get("proc"):
        try:
            existing["proc"].kill()
        except Exception:
            pass

    proc = subprocess.Popen(
        [cmd, script, "--login"],
        stdout=subprocess.PIPE, stderr=subprocess.PIPE,
        env=env, text=True,
    )

    # Read stdout lines until we find the device code (MSAL prints it)
    import threading
    login_state: dict = {"proc": proc, "status": "waiting_for_code", "device_code": "", "device_code_url": "", "email": None, "output": ""}

    def _read_output():
        import re
        for line in proc.stdout:
            login_state["output"] += line
            # MSAL device code message contains the URL and code
            code_match = re.search(r'enter the code\s+(\S+)', line, re.IGNORECASE)
            url_match = re.search(r'(https://\S+)', line)
            if code_match:
                login_state["device_code"] = code_match.group(1)
                login_state["status"] = "awaiting_auth"
            if url_match and "microsoft" in url_match.group(1).lower():
                login_state["device_code_url"] = url_match.group(1)
        # Process ended — check result
        proc.wait()
        remaining_stderr = proc.stderr.read() if proc.stderr else ""
        login_state["output"] += remaining_stderr
        if proc.returncode == 0:
            login_state["status"] = "connected"
            # Try to extract email from output
            try:
                import json as _j
                result = _j.loads(login_state["output"].strip().split("\n")[-1])
                if result.get("success"):
                    ud = result.get("userData", {})
                    login_state["email"] = ud.get("userPrincipalName") or ud.get("displayName")
            except Exception:
                pass
            # Update tool status
            try:
                t = _load(tool_id)
                t.auth_status = "connected"
                if login_state.get("email"):
                    t.connected_account_email = login_state["email"]
                _save(t)
            except Exception:
                pass
        else:
            login_state["status"] = "error"

    thread = threading.Thread(target=_read_output, daemon=True)
    thread.start()

    _m365_login_processes[tool_id] = login_state

    # Wait briefly for device code to appear
    for _ in range(30):
        if login_state["device_code"]:
            break
        await asyncio.sleep(0.2)

    if not login_state["device_code"]:
        return {"status": "error", "message": "Timed out waiting for device code from MCP server"}

    return {
        "status": "awaiting_auth",
        "device_code": login_state["device_code"],
        "device_code_url": login_state["device_code_url"] or "https://login.microsoft.com/device",
    }


@tools_lib.router.get("/{tool_id}/m365/device-login/status")
async def m365_device_login_status(tool_id: str):
    """Poll the status of a pending M365 device-code login."""
    state = _m365_login_processes.get(tool_id)
    if not state:
        # Check if already connected via cached token
        cache_env = _m365_cache_env()
        cache_path = cache_env["MS365_MCP_TOKEN_CACHE_PATH"]
        if os.path.isfile(cache_path):
            tool = _load(tool_id)
            if tool.auth_status == "connected":
                return {"status": "connected", "email": tool.connected_account_email}
        return {"status": "no_login_in_progress"}

    status = state["status"]
    result: dict = {"status": status}
    if status == "connected":
        result["email"] = state.get("email")
        _m365_login_processes.pop(tool_id, None)
    elif status == "error":
        result["message"] = "Login failed"
        _m365_login_processes.pop(tool_id, None)

    return result


@tools_lib.router.post("/{tool_id}/m365/disconnect")
async def m365_disconnect(tool_id: str):
    """Disconnect M365 by clearing the cached token."""
    tool = _load(tool_id)
    cache_env = _m365_cache_env()
    for path in cache_env.values():
        if os.path.isfile(path):
            os.remove(path)
    tool.auth_status = "configured"
    tool.connected_account_email = None
    _save(tool)
    return {"ok": True, "tool": tool.model_dump()}


@tools_lib.router.post("/{tool_id}/oauth/disconnect")
async def oauth_disconnect(tool_id: str):
    """Clear OAuth tokens and reset auth status so the user can reconnect with a different account."""
    tool = _load(tool_id)
    access_token = tool.oauth_tokens.get("access_token")

    if access_token and tool.name.lower() != "notion":
        # Revoke Google tokens
        try:
            async with httpx.AsyncClient(timeout=10.0) as client:
                await client.post(
                    "https://oauth2.googleapis.com/revoke",
                    params={"token": access_token},
                    headers={"Content-Type": "application/x-www-form-urlencoded"},
                )
        except Exception as e:
            logger.warning(f"Failed to revoke Google token for tool {tool.id}: {e}")

    tool.oauth_tokens = {}
    tool.auth_status = "configured"
    tool.connected_account_email = None
    _save(tool)
    return {"ok": True, "tool": tool.model_dump()}


@tools_lib.router.post("/{tool_id}/oauth/start")
async def oauth_start(tool_id: str):
    tool = _load(tool_id)
    _port = os.environ.get("OPENSWARM_PORT", "8324")
    redirect_uri = f"http://localhost:{_port}/api/tools/oauth/callback"
    state = tool_id

    if tool.name.lower() == "airtable":
        client_id = os.environ.get("AIRTABLE_OAUTH_CLIENT_ID", "")
        if not client_id:
            raise HTTPException(status_code=400, detail="AIRTABLE_OAUTH_CLIENT_ID not set in backend .env")
        # PKCE: generate code_verifier and code_challenge
        code_verifier = secrets.token_urlsafe(96)
        code_challenge = hashlib.sha256(code_verifier.encode()).digest()
        import base64
        code_challenge_b64 = base64.urlsafe_b64encode(code_challenge).rstrip(b"=").decode()
        _pending_oauth[state] = {"tool_id": tool_id, "code_verifier": code_verifier}
        params = {
            "client_id": client_id,
            "redirect_uri": redirect_uri,
            "response_type": "code",
            "scope": " ".join(AIRTABLE_SCOPES),
            "state": state,
            "code_challenge": code_challenge_b64,
            "code_challenge_method": "S256",
        }
        auth_url = f"{AIRTABLE_AUTH_URL}?{urlencode(params)}"
    elif tool.name.lower() == "hubspot":
        client_id = os.environ.get("HUBSPOT_OAUTH_CLIENT_ID", "")
        if not client_id:
            raise HTTPException(status_code=400, detail="HUBSPOT_OAUTH_CLIENT_ID not set in backend .env")
        code_verifier = secrets.token_urlsafe(96)
        code_challenge = hashlib.sha256(code_verifier.encode()).digest()
        import base64
        code_challenge_b64 = base64.urlsafe_b64encode(code_challenge).rstrip(b"=").decode()
        _pending_oauth[state] = {"tool_id": tool_id, "code_verifier": code_verifier}
        params = {
            "client_id": client_id,
            "redirect_uri": redirect_uri,
            "code_challenge": code_challenge_b64,
            "code_challenge_method": "S256",
            "state": state,
        }
        auth_url = f"{HUBSPOT_AUTH_URL}?{urlencode(params)}"
    elif tool.name.lower() == "discord":
        client_id = os.environ.get("DISCORD_OAUTH_CLIENT_ID", "")
        if not client_id:
            raise HTTPException(status_code=400, detail="DISCORD_OAUTH_CLIENT_ID not set in backend .env")
        permissions = os.environ.get("DISCORD_BOT_PERMISSIONS", "0")
        _pending_oauth[state] = {"tool_id": tool_id}
        params = {
            "client_id": client_id,
            "redirect_uri": redirect_uri,
            "response_type": "code",
            "scope": "bot identify",
            "permissions": permissions,
            "state": state,
        }
        auth_url = f"{DISCORD_AUTH_URL}?{urlencode(params)}"
    elif tool.name.lower() == "notion":
        _pending_oauth[state] = {"tool_id": tool_id}
        client_id = os.environ.get("NOTION_OAUTH_CLIENT_ID", "")
        if not client_id:
            raise HTTPException(status_code=400, detail="NOTION_OAUTH_CLIENT_ID not set in backend .env")
        params = {
            "client_id": client_id,
            "redirect_uri": redirect_uri,
            "response_type": "code",
            "owner": "user",
            "state": state,
        }
        auth_url = f"https://api.notion.com/v1/oauth/authorize?{urlencode(params)}"
    else:
        _pending_oauth[state] = {"tool_id": tool_id}
        client_id = os.environ.get("GOOGLE_OAUTH_CLIENT_ID", "")
        if not client_id:
            raise HTTPException(status_code=400, detail="GOOGLE_OAUTH_CLIENT_ID not set in backend .env")
        params = {
            "client_id": client_id,
            "redirect_uri": redirect_uri,
            "response_type": "code",
            "scope": " ".join(GOOGLE_SCOPES),
            "access_type": "offline",
            "prompt": "consent",
            "state": state,
        }
        auth_url = f"{GOOGLE_AUTH_URL}?{urlencode(params)}"

    return {"auth_url": auth_url}




async def refresh_google_token(tool: ToolDefinition) -> Optional[str]:
    """Refresh an expired Google OAuth token. Returns the fresh access_token or None."""
    if tool.auth_type != "oauth2":
        return None
    refresh_token = tool.oauth_tokens.get("refresh_token")
    if not refresh_token:
        return None
    expiry = tool.oauth_tokens.get("token_expiry", 0)
    if time.time() < expiry - 60:
        return tool.oauth_tokens.get("access_token")

    client_id = os.environ.get("GOOGLE_OAUTH_CLIENT_ID", "")
    client_secret = os.environ.get("GOOGLE_OAUTH_CLIENT_SECRET", "")
    if not client_id or not client_secret:
        return None

    try:
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post(GOOGLE_TOKEN_URL, data={
                "client_id": client_id,
                "client_secret": client_secret,
                "refresh_token": refresh_token,
                "grant_type": "refresh_token",
            })
        if resp.status_code == 200:
            data = resp.json()
            new_token = data["access_token"]
            tool.oauth_tokens["access_token"] = new_token
            tool.oauth_tokens["token_expiry"] = time.time() + data.get("expires_in", 3600)

            if not tool.connected_account_email:
                try:
                    async with httpx.AsyncClient(timeout=10.0) as info_client:
                        info_resp = await info_client.get(
                            GOOGLE_USERINFO_URL,
                            headers={"Authorization": f"Bearer {new_token}"},
                        )
                    if info_resp.status_code == 200:
                        tool.connected_account_email = info_resp.json().get("email")
                except Exception:
                    pass

            _save(tool)
            return new_token
    except Exception as e:
        logger.warning(f"Google token refresh failed for tool {tool.id}: {e}")
    return None


async def refresh_airtable_token(tool: ToolDefinition) -> Optional[str]:
    """Refresh an expired Airtable OAuth token. Returns the fresh access_token or None."""
    if tool.auth_type != "oauth2":
        return None
    refresh_token = tool.oauth_tokens.get("refresh_token")
    if not refresh_token:
        return None
    expiry = tool.oauth_tokens.get("token_expiry", 0)
    if time.time() < expiry - 60:
        return tool.oauth_tokens.get("access_token")

    client_id = os.environ.get("AIRTABLE_OAUTH_CLIENT_ID", "")
    client_secret = os.environ.get("AIRTABLE_OAUTH_CLIENT_SECRET", "")
    if not client_id or not client_secret:
        return None

    try:
        import base64
        credentials = base64.b64encode(f"{client_id}:{client_secret}".encode()).decode()
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post(AIRTABLE_TOKEN_URL, data={
                "grant_type": "refresh_token",
                "refresh_token": refresh_token,
                "client_id": client_id,
            }, headers={
                "Authorization": f"Basic {credentials}",
                "Content-Type": "application/x-www-form-urlencoded",
            })
        if resp.status_code == 200:
            data = resp.json()
            tool.oauth_tokens["access_token"] = data["access_token"]
            tool.oauth_tokens["token_expiry"] = time.time() + data.get("expires_in", 7200)
            if data.get("refresh_token"):
                tool.oauth_tokens["refresh_token"] = data["refresh_token"]
            _save(tool)
            return data["access_token"]
    except Exception as e:
        logger.warning(f"Airtable token refresh failed for tool {tool.id}: {e}")
    return None


async def refresh_hubspot_token(tool: ToolDefinition) -> Optional[str]:
    """Refresh an expired HubSpot OAuth token. Returns the fresh access_token or None."""
    if tool.auth_type != "oauth2":
        return None
    refresh_token = tool.oauth_tokens.get("refresh_token")
    if not refresh_token:
        return None
    expiry = tool.oauth_tokens.get("token_expiry", 0)
    if time.time() < expiry - 60:
        return tool.oauth_tokens.get("access_token")

    client_id = os.environ.get("HUBSPOT_OAUTH_CLIENT_ID", "")
    client_secret = os.environ.get("HUBSPOT_OAUTH_CLIENT_SECRET", "")
    if not client_id or not client_secret:
        return None

    try:
        async with httpx.AsyncClient(timeout=15.0) as client:
            resp = await client.post(HUBSPOT_TOKEN_URL, data={
                "grant_type": "refresh_token",
                "refresh_token": refresh_token,
                "client_id": client_id,
                "client_secret": client_secret,
            }, headers={
                "Content-Type": "application/x-www-form-urlencoded",
            })
        if resp.status_code == 200:
            data = resp.json()
            tool.oauth_tokens["access_token"] = data["access_token"]
            tool.oauth_tokens["token_expiry"] = time.time() + data.get("expires_in", 1800)
            if data.get("refresh_token"):
                tool.oauth_tokens["refresh_token"] = data["refresh_token"]
            _save(tool)
            return data["access_token"]
    except Exception as e:
        logger.warning(f"HubSpot token refresh failed for tool {tool.id}: {e}")
    return None