"""opax-mcp — MCP Streamable HTTP server for OPAX/Vauco
Transport: MCP Streamable HTTP (JSON-RPC 2.0) on POST /
Auth: Authorization: Bearer <secret>  OR  X-MCP-Secret: <secret>  OR  api-key: <secret>
"""
import os
import json
import uuid
import httpx
import base64
import google.auth
import google.auth.transport.requests
import google.oauth2.id_token
from googleapiclient.discovery import build
from google.cloud import secretmanager
from google.oauth2 import service_account
from fastapi import FastAPI, Request, HTTPException
from fastapi.responses import JSONResponse
from email.mime.text import MIMEText
from email.mime.text import MIMEText
from datetime import datetime, timezone, timedelta
from typing import Any, Optional
import logging
from pydantic import BaseModel


class ConfirmationRequired(BaseModel):
    message: str
    preview: dict
    requires_confirmation: bool = True

def require_confirmation(confirm: bool, preview: dict, message: str = "This action requires confirmation"):
    if not confirm:
        raise HTTPException(
            status_code=400,
            detail=ConfirmationRequired(message=message, preview=preview).model_dump()
        )


logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

app = FastAPI(title="opax-mcp", version="3.5.0") # BUMPED

# ── Service discovery ───────────────────────────────────────────────────────
OSVAUCO_AGENT_URL    = os.environ.get("OSVAUCO_AGENT_URL", "") # f.eks. https://osvauco-agent-....run.app
MCP_SECRET           = os.environ.get("MCP_SECRET", "")
INTERNAL_API_KEY     = os.environ.get("INTERNAL_API_KEY", "")
GITEA_URL            = os.environ.get("GITEA_URL", "http://34.59.131.162:3000")
GITEA_TOKEN          = os.environ.get("GITEA_TOKEN", "")
GITEA_REPO           = os.environ.get("GITEA_REPO", "chris/OSVauco")
GOOGLE_CLOUD_PROJECT = os.environ.get("GOOGLE_CLOUD_PROJECT", "propane-will-491900-m5")
WORKSPACE_ADMIN_USER = "chris.christiansen@vauco.no"

# Emma-vm Ollama — direkte tilkobling
OLLAMA_BASE_URL      = os.environ.get("OLLAMA_BASE_URL", "http://34.13.238.133:11434")
EMMA_MODEL           = os.environ.get("EMMA_MODEL", "gemma3:27b")
EMMA_FAST_MODEL      = os.environ.get("EMMA_FAST_MODEL", "gemma3:4b")
EMMA_LIGHT_MODEL     = os.environ.get("EMMA_LIGHT_MODEL", "qwen2.5:3b")

logger.info(f"OSVAUCO_AGENT_URL: {OSVAUCO_AGENT_URL}")
logger.info(f"OLLAMA_BASE_URL: {OLLAMA_BASE_URL}")


# ---------------------------------------------------------------------------
# Auth (kun for innkommende kall til opax-mcp, f.eks. fra Gemini TUI)
# ---------------------------------------------------------------------------

async def _verify_auth(request: Request) -> None:
    secret = os.getenv("MCP_SECRET")
    if not secret:
        raise HTTPException(status_code=500, detail="MCP_SECRET not configured")
    auth = request.headers.get("Authorization", "")
    if not auth.startswith("Bearer ") or auth[7:] != secret:
        raise HTTPException(status_code=401, detail="Invalid or missing token")


# ---------------------------------------------------------------------------
# Backend Agent helpers (for kall VIDERE til osvauco-agent)
# ---------------------------------------------------------------------------

def _agent_headers() -> dict:
    """Headers for maskin-til-maskin kall videre til osvauco-agent via X-Internal-Key."""
    return {
        "X-Internal-Key": INTERNAL_API_KEY, # Bruker den nye delte nøkkelen
        "Content-Type": "application/json"
    }

async def _agent_get(path: str) -> Any:
    """GET-kall til osvauco-agent."""
    url = f"{OSVAUCO_AGENT_URL}{path}"
    async with httpx.AsyncClient(timeout=30) as c:
        r = await c.get(url, headers=_agent_headers())
        r.raise_for_status()
        return r.json()

async def _agent_post(path: str, body: dict) -> Any:
    """POST-kall til osvauco-agent."""
    url = f"{OSVAUCO_AGENT_URL}{path}"
    async with httpx.AsyncClient(timeout=45) as c:
        r = await c.post(url, json=body, headers=_agent_headers())
        r.raise_for_status()
        return r.json()

# ---------------------------------------------------------------------------
# Google Workspace Helpers
# ---------------------------------------------------------------------------

def _get_workspace_service(api: str, version: str, scopes: list):
    """
    Creates an authenticated Google API service object using a service account
    key from Secret Manager and impersonating the admin user.
    """
    try:
        client = secretmanager.SecretManagerServiceClient()
        secret_name = "workspace-sa-key"
        version_name = f"projects/{GOOGLE_CLOUD_PROJECT}/secrets/{secret_name}/versions/latest"
        response = client.access_secret_version(request={"name": version_name})
        secret_payload = response.payload.data.decode("UTF-8")
        secret_info = json.loads(secret_payload)
        creds = service_account.Credentials.from_service_account_info(
            secret_info, scopes=scopes
        )
        delegated_creds = creds.with_subject(WORKSPACE_ADMIN_USER)
        return build(api, version, credentials=delegated_creds, cache_discovery=False)
    except Exception as e:
        logger.error(f"Failed to get Workspace service: {e}", exc_info=True)
        raise

async def create_email_alias(p: dict) -> dict:
    """Creates a new email alias for a Google Workspace user."""
    user_key = p.get("user_key")
    alias_email = p.get("alias")
    if not user_key or not alias_email:
        raise ValueError("Missing required parameters: 'user_key' and 'alias'")
    service = _get_workspace_service('admin', 'directory_v1', ['https://www.googleapis.com/auth/admin.directory.user'])
    alias_body = {'alias': alias_email}
    logger.info(f"Creating alias '{alias_email}' for user '{user_key}'...")
    result = service.users().aliases().insert(userKey=user_key, body=alias_body).execute()
    logger.info(f"Successfully created alias.")
    return {"status": "success", "alias": result}

async def list_user_aliases(p: dict) -> dict:
    """Lists all aliases for a Google Workspace user."""
    user_key = p.get("user_key")
    if not user_key:
        raise ValueError("Missing required parameter: 'user_key'")
    service = _get_workspace_service('admin', 'directory_v1', ['https://www.googleapis.com/auth/admin.directory.user'])
    logger.info(f"Listing aliases for user '{user_key}'...")
    result = service.users().aliases().list(userKey=user_key).execute()
    logger.info(f"Successfully listed aliases.")
    return {"status": "success", "aliases": result.get("aliases", [])}

async def delete_email_alias(p: dict) -> dict:
    """Deletes an email alias from a Google Workspace user."""
    user_key = p.get("user_key")
    alias_email = p.get("alias")
    if not user_key or not alias_email:
        raise ValueError("Missing required parameters: 'user_key' and 'alias'")
    service = _get_workspace_service('admin', 'directory_v1', ['https://www.googleapis.com/auth/admin.directory.user'])
    logger.info(f"Deleting alias '{alias_email}' for user '{user_key}'...")
    service.users().aliases().delete(userKey=user_key, alias=alias_email).execute()
    logger.info(f"Successfully deleted alias.")
    return {"status": "success", "detail": f"Alias '{alias_email}' deleted."}

async def send_email_as(p: dict) -> dict:
    """Sends an email as a user or their alias, on their behalf."""
    from_address, to_address, subject, body = p.get("from"), p.get("to"), p.get("subject"), p.get("body")
    if not all([from_address, to_address, subject, body]):
        raise ValueError("Missing required parameters: 'from', 'to', 'subject', 'body'")
    service = _get_workspace_service('gmail', 'v1', ['https://www.googleapis.com/auth/gmail.send'])
    message = MIMEText(body)
    message['to'], message['from'], message['subject'] = to_address, from_address, subject
    encoded_message = base64.urlsafe_b64encode(message.as_bytes()).decode()
    create_message = {'raw': encoded_message}
    logger.info(f"Sending email from '{from_address}' to '{to_address}'...")
    send_message = service.users().messages().send(userId='me', body=create_message).execute()
    logger.info(f"Successfully sent email with ID: {send_message['id']}")
    return {"status": "success", "message_id": send_message['id']}

async def get_workspace_user(p: dict) -> dict:
    """Gets detailed information about a single user in Google Workspace."""
    user_key = p.get("user_key")
    if not user_key: raise ValueError("Missing required parameter: 'user_key'")
    service = _get_workspace_service('admin', 'directory_v1', ['https://www.googleapis.com/auth/admin.directory.user'])
    logger.info(f"Getting info for user '{user_key}'...")
    user = service.users().get(userKey=user_key).execute()
    logger.info(f"Successfully retrieved user info.")
    return {"name": user.get("name", {}).get("fullName"), "email": user.get("primaryEmail"), "aliases": user.get("aliases", []), "suspended": user.get("suspended"), "lastLoginTime": user.get("lastLoginTime")}

async def list_workspace_users(p: dict) -> dict:
    """Lists all users in the Google Workspace domain."""
    service = _get_workspace_service('admin', 'directory_v1', ['https://www.googleapis.com/auth/admin.directory.user'])
    logger.info("Listing all workspace users...")
    result = service.users().list(domain='vauco.no', maxResults=50, orderBy='email').execute()
    users = result.get('users', [])
    logger.info(f"Found {len(users)} users.")
    return {"users": [{"email": user.get("primaryEmail"), "name": user.get("name", {}).get("fullName")} for user in users]}

async def get_emails(p: dict) -> dict:
    """Searches a user's mailbox and retrieves a list of emails."""
    user_key, query, max_results = p.get('user_key'), p.get('query', ''), p.get('max_results', 10)
    if not user_key: raise ValueError("Missing required parameter: 'user_key'")
    service = _get_workspace_service('gmail', 'v1', ['https://www.googleapis.com/auth/gmail.modify'])
    logger.info(f"Searching emails for user '{user_key}' with query '{query}'...")
    list_result = service.users().messages().list(userId=user_key, q=query, maxResults=max_results).execute()
    messages = list_result.get('messages', [])
    if not messages: return {"messages": []}
    email_details = []
    for msg in messages:
        detail = service.users().messages().get(userId=user_key, id=msg['id'], format='metadata', metadataHeaders=['subject', 'from']).execute()
        headers = {h['name']: h['value'] for h in detail['payload']['headers']}
        email_details.append({"id": msg['id'], "snippet": detail.get('snippet'), "subject": headers.get('Subject'), "from": headers.get('From')})
    logger.info(f"Successfully retrieved {len(email_details)} emails.")
    return {"messages": email_details}

async def list_calendar_events(p: dict) -> dict:
    """Lists events from a user's calendar."""
    user_key, days_ahead = p.get('user_key'), p.get('days_ahead', 7)
    if not user_key: raise ValueError("Missing required parameter: 'user_key'")
    service = _get_workspace_service('calendar', 'v3', ['https://www.googleapis.com/auth/calendar'])
    logger.info(f"Fetching calendar events for '{user_key}' for the next {days_ahead} days...")
    now, time_min = datetime.now(timezone.utc), (datetime.now(timezone.utc)).isoformat()
    time_max = (now + timedelta(days=days_ahead)).isoformat()
    events_result = service.events().list(calendarId=user_key, timeMin=time_min, timeMax=time_max, singleEvents=True, orderBy='startTime').execute()
    events = events_result.get('items', [])
    formatted_events = [{"summary": event.get('summary'), "start": event.get('start', {}).get('dateTime', event.get('start', {}).get('date')), "end": event.get('end', {}).get('dateTime', event.get('end', {}).get('date')), "organizer": event.get('organizer', {}).get('email')} for event in events]
    logger.info(f"Found {len(formatted_events)} events.")
    return {"events": formatted_events}

async def trigger_build(p: dict) -> dict:
    """Trigger en Cloud Build manuelt ved å sende kildekode fra Gitea."""
    import subprocess
    repo = p.get("repo", "OSVauco")
    branch = p.get("branch", "main")
    config = p.get("config", "cloudbuild.mcp.yaml")
    
    result = subprocess.run([
        "gcloud", "builds", "submit",
        f"/home/chris_christiansen/OSVauco",
        f"--config={config}",
        f"--project={GOOGLE_CLOUD_PROJECT}"
    ], capture_output=True, text=True)

    if result.returncode != 0:
        error_message = result.stderr.strip()
        logger.error(f"Cloud Build trigger failed: {error_message}")
        return {"status": "error", "message": error_message}

    build_id = "Not found in output"
    for line in result.stdout.split('\n'):
        if "ID:" in line:
            build_id = line.split("ID:")[1].strip()
            break
            
    return {"status": "triggered", "build_id": build_id}

# ---------------------------------------------------------------------------
# Ollama helpers — direkte mot emma-gpu-vm
# ---------------------------------------------------------------------------

async def _ollama_chat(model: str, prompt: str, system: str = "") -> dict:
    # ... (beholdt uendret)
    messages = []
    if system:
        messages.append({"role": "system", "content": system})
    messages.append({"role": "user", "content": prompt})
    payload = { "model": model, "messages": messages, "stream": False }
    try:
        async with httpx.AsyncClient(timeout=120) as c:
            r = await c.post(f"{OLLAMA_BASE_URL}/api/chat", json=payload)
            r.raise_for_status()
            data = r.json()
            return { "model": model, "response": data.get("message", {}).get("content", ""), "done": data.get("done", True), "total_duration_ms": round(data.get("total_duration", 0) / 1e6) }
    except Exception as e:
        logger.error(f"[OLLAMA ERROR] model={model} {type(e).__name__}: {e}")
        raise

async def _ollama_models() -> list:
    async with httpx.AsyncClient(timeout=10) as c:
        r = await c.get(f"{OLLAMA_BASE_URL}/api/tags")
        r.raise_for_status()
        return r.json().get("models", [])

# ---------------------------------------------------------------------------
# Gitea helpers
# ---------------------------------------------------------------------------

def _gitea_headers() -> dict:
    return {"Authorization": f"token {GITEA_TOKEN}", "Content-Type": "application/json", "Accept": "application/json"}

async def _gitea_get(path: str) -> Any:
    # ... (beholdt uendret)
    async with httpx.AsyncClient(timeout=30) as c:
        r = await c.get(f"{GITEA_URL}/api/v1{path}", headers=_gitea_headers())
        r.raise_for_status()
        return r.json()

async def _gitea_post(path: str, body: dict) -> Any:
    # ... (beholdt uendret)
    async with httpx.AsyncClient(timeout=30) as c:
        r = await c.post(f"{GITEA_URL}/api/v1{path}", json=body, headers=_gitea_headers())
        r.raise_for_status()
        return r.json()

async def _gitea_put(path: str, body: dict) -> Any:
    # ... (beholdt uendret)
    async with httpx.AsyncClient(timeout=30) as c:
        r = await c.put(f"{GITEA_URL}/api/v1{path}", json=body, headers=_gitea_headers())
        r.raise_for_status()
        return r.json()


# ---------------------------------------------------------------------------
# Tool implementations (refaktorert til å bruke _agent_get/_agent_post)
# ---------------------------------------------------------------------------

async def get_billing_summary(p):          return await _agent_get("/billing/summary")
async def get_billing_forecast(p):         return await _agent_get("/billing/forecast")
async def get_billing_credits(p):          return await _agent_get("/billing/credits")
async def get_billing_anomalies(p):        return await _agent_get("/billing/anomalies")
async def get_billing_history(p):          return await _agent_get("/billing/history")
async def get_billing_budget(p):           return await _agent_get("/billing/budget")
async def get_billing_tokens_by_module(p): return await _agent_get("/telemetry/history")
async def set_billing_budget(p):           return await _agent_post("/billing/budget", {"budget": p.get("amount", 500)})

async def create_invite(p):
    return await _agent_post("/onboard/invite", {
        "company": p.get("company", p.get("name", "")), "email": p.get("email"), "tier": p.get("tier", "starter"),
    })

async def list_customers(p):               return await _agent_get("/state")
async def send_webhook(p):
    return await _agent_post("/notify/webhook", {
        "url": p.get("url", ""), "event": p.get("event", "custom"),
        "title": p.get("title", "OPAX varsel"), "body": p.get("message", p.get("body", "")),
    })

async def send_email(p):                   return await _agent_post("/notify/email", {"to": p.get("to"), "subject": p.get("subject"), "event": p.get("event", "digest")})
async def send_sms(p):                     return await _agent_post("/notify/sms", {"to": p.get("to"), "body": p.get("message", p.get("body", "")), "event": p.get("event", "spike"), "tier": p.get("tier", "guard")})
async def get_notify_channels(p):          return await _agent_get("/notify/channels")
async def get_health(p):                   return await _agent_get("/health")
async def get_build_status(p):             return await _agent_get("/opax/build-status")
async def get_state(p):                    return await _agent_get("/state")
async def get_telemetry(p):                return await _agent_get("/telemetry/history")
async def run_terminal(p):                 return await _agent_post("/terminal/exec", {"cmd": p.get("command", p.get("cmd", "help"))})
async def tui_command(p):                  return await _agent_post("/tui-command", p)

# --- Uendrede funksjoner ---
async def run_jason(p):
    """Kaller /run på osvauco-agent, som nå har sin egen JASON_BACKEND-logikk."""
    return await _agent_post("/run", {"message": p.get("prompt", p.get("message", "")), "user_id": p.get("user_id", "opax"), "session_id": p.get("session_id", "mcp"), "mode": p.get("mode", "light")})
async def run_emma(p):                     return await _ollama_chat(EMMA_MODEL, p.get("prompt", p.get("message", "")), p.get("system", "Du er Emma Vauger..."))
async def run_emma_fast(p):                return await _ollama_chat(EMMA_FAST_MODEL, p.get("prompt", p.get("message", "")), p.get("system", "Du er en rask og konsis AI-assistent..."))
async def run_qwen(p):                     return await _ollama_chat(EMMA_LIGHT_MODEL, p.get("prompt", p.get("message", "")))
async def list_emma_models(p):             return await _ollama_models()
async def list_commits(p):                 return await _gitea_get(f"/repos/{p.get('repo', GITEA_REPO)}/commits?limit={p.get('limit', 10)}")
async def get_file(p):                     return await _gitea_get(f"/repos/{p.get('repo', GITEA_REPO)}/contents/{p.get('path', '')}?ref={p.get('ref', 'main')}")
async def list_open_issues(p):             return await _gitea_get(f"/repos/{p.get('repo', GITEA_REPO)}/issues?state=open&limit=20")
async def create_issue(p):                 return await _gitea_post(f"/repos/{p.get('repo', GITEA_REPO)}/issues", {"title": p.get("title"), "body": p.get("body", "")})
async def push_file(p):                    
    # ... (beholdt uendret)
    repo, path = p.get("repo", GITEA_REPO), p.get("path")
    content = base64.b64encode(p.get("content", "").encode()).decode()
    body = {"message": p.get("message", f"chore: update {path} via opax-mcp"), "content": content, "branch": p.get("branch", "main")}
    if not p.get("sha"):
        try:
            existing = await _gitea_get(f"/repos/{repo}/contents/{path}?ref={p.get('branch','main')}")
            body["sha"] = existing["sha"]
        except Exception: pass
    else: body["sha"] = p["sha"]
    if "sha" in body: return await _gitea_put(f"/repos/{repo}/contents/{path}", body)
    return await _gitea_post(f"/repos/{repo}/contents/{path}", body)

# ---------------------------------------------------------------------------
# Tool registry + MCP schema
# ---------------------------------------------------------------------------

TOOLS = {
    # Billing
    "get_billing_summary":         (get_billing_summary,         "Hent billing-sammendrag for OPAX", {}),
    "get_billing_forecast": (
        get_billing_forecast,
        "Get billing forecast",
        {},
    ),
    "get_billing_credits": (
        get_billing_credits,
        "Get available billing credits",
        {},
    ),
    "get_billing_anomalies": (
        get_billing_anomalies,
        "Get billing anomalies",
        {},
    ),
    "get_billing_history": (
        get_billing_history,
        "Get billing history",
        {},
    ),
    "get_billing_budget": (
        get_billing_budget,
        "Get the configured billing budget",
        {},
    ),
    "get_telemetry": (
        get_billing_tokens_by_module,
        "Get token and telemetry history by module",
        {},
    ),
    "set_billing_budget":          (set_billing_budget,          "Sett månedlig budsjett", {"type":"object","properties":{"amount":{"type":"number"}}}),
    # Onboarding
    "create_invite":               (create_invite,               "Inviter ny kunde til OPAX", {"type":"object","properties":{"company":{"type":"string"},"email":{"type":"string"},"tier":{"type":"string"}},"required":["email"]}),
    # Notifications
    "send_webhook":                (send_webhook,                "Send webhook-varsling", {"type":"object","properties":{"url":{"type":"string"},"message":{"type":"string"}}}),
    "send_email":                  (send_email,                  "Send e-post via ekstern tjeneste", {"type":"object","properties":{"to":{"type":"string"},"subject":{"type":"string"}},"required":["to","subject"]}),
    "send_sms":                    (send_sms,                    "Send SMS", {"type":"object","properties":{"to":{"type":"string"},"message":{"type":"string"}},"required":["to","message"]}),
    "get_notify_channels": (
        get_notify_channels,
        "List configured notification channels",
        {},
    ),
    # AI Agents
    "run_jason":                   (run_jason,                   "Kjør Jason-agenten med en prompt", {"type":"object","properties":{"prompt":{"type":"string"},"mode":{"type":"string"}},"required":["prompt"]}),
    "run_emma":                    (run_emma,                    "Emma Vauger (gemma3:27b) — primær lokal AI", {"type":"object","properties":{"prompt":{"type":"string"}}}),

    # Local models — read-only discovery
    "list_emma_models": (
        list_emma_models,
        "List locally available OSVx model names",
        {},
    ),

    # System & Ops
    "get_health":                  (get_health,                  "Hent helsestatus for OPAX", {}),
    "get_build_status":            (get_build_status,            "Hent siste build-status", {}),
    "trigger_build":               (trigger_build,               "Trigger en Cloud Build manuelt", {"type":"object","properties":{"repo":{"type":"string"},"branch":{"type":"string"},"config":{"type":"string"}}}),
    "get_state":                   (get_state,                   "Hent platform-tilstand", {}),
    "list_customers":              (list_customers,              "List alle kunder (alias for get_state)", {}),
    "run_terminal":                (run_terminal,                "Kjør terminalkommando på VM", {"type":"object","properties":{"command":{"type":"string"}}}),
    # Gitea / VCS
    "list_commits":                (list_commits,                "List siste commits i Gitea-repo", {}),
    "get_file":                    (get_file,                    "Hent fil fra Gitea-repo", {"type":"object","properties":{"path":{"type":"string"}},"required":["path"]}),
    # Google Workspace
    "create_email_alias":          (create_email_alias,          "Opprett et nytt e-postalias", {"type":"object","properties":{"user_key":{"type":"string"},"alias":{"type":"string"}},"required":["user_key","alias"]}),
    "list_user_aliases":           (list_user_aliases,           "List en brukers e-postaliaser", {"type":"object","properties":{"user_key":{"type":"string"}},"required":["user_key"]}),
    "delete_email_alias":          (delete_email_alias,          "Slett et e-postalias", {"type":"object","properties":{"user_key":{"type":"string"},"alias":{"type":"string"}},"required":["user_key","alias"]}),
    "send_email_as":               (send_email_as,               "Send en e-post på vegne av en bruker/alias", {"type":"object","properties":{"from":{"type":"string"},"to":{"type":"string"},"subject":{"type":"string"},"body":{"type":"string"}},"required":["from","to","subject","body"]}),
    "get_workspace_user":          (get_workspace_user,          "Hent detaljer for en Workspace-bruker", {"type":"object","properties":{"user_key":{"type":"string"}},"required":["user_key"]}),
    "list_workspace_users":        (list_workspace_users,        "List alle brukere i Workspace-domenet", {}),
    "get_emails":                  (get_emails,                  "Søk i en brukers e-post", {"type":"object","properties":{"user_key":{"type":"string"},"query":{"type":"string"}},"required":["user_key"]}),
    "list_calendar_events":        (list_calendar_events,        "List en brukers kalenderhendelser", {"type":"object","properties":{"user_key":{"type":"string"},"days_ahead":{"type":"integer"}},"required":["user_key"]}),
}

# ---------------------------------------------------------------------------
# JSON-RPC Endpoint
# ---------------------------------------------------------------------------

def _jsonrpc_ok(req_id, result):
    return {"jsonrpc": "2.0", "id": req_id, "result": result}
def _jsonrpc_err(req_id, code, message):
    return {"jsonrpc": "2.0", "id": req_id, "error": {"code": code, "message": message}}

@app.post("/")
async def mcp_handler(request: Request):
    # ... (beholdt uendret)
    _verify_auth(request)
    try: body = await request.json()
    except Exception: return JSONResponse(_jsonrpc_err(None, -32700, "Parse error"), status_code=400)
    method, req_id, params = body.get("method", ""), body.get("id"), body.get("params", {})
    if method == "initialize":
        return JSONResponse(_jsonrpc_ok(req_id, {"protocolVersion": "2024-11-05", "capabilities": {"tools": {}},"serverInfo": {"name": "opax-mcp", "version": "3.5.0"}})) # BUMPED
    if method == "tools/list":
        return JSONResponse(_jsonrpc_ok(req_id, {"tools": [
            {"name": name, "description": desc, "inputSchema": schema if schema else {"type": "object", "properties": {}}}
            for name, (_, desc, schema) in TOOLS.items()
        ]}))
    if method == "tools/call":
        tool_name, tool_args = params.get("name") or params.get("tool"), params.get("arguments", params.get("params", {}))
        entry = TOOLS.get(tool_name)
        if not entry: return JSONResponse(_jsonrpc_err(req_id, -32601, f"Unknown tool: {tool_name}"))
        handler, _, _ = entry
        try:
            result = await handler(tool_args)
            return JSONResponse(_jsonrpc_ok(req_id, {"content": [{"type": "text", "text": json.dumps(result, ensure_ascii=False)}]}))
        except Exception as e:
            logger.error(f"[MCP HANDLER ERROR] tool={tool_name} {type(e).__name__}: {e}", exc_info=True)
            return JSONResponse(_jsonrpc_err(req_id, -32000, str(e)))
    if method.startswith("notifications/"): return JSONResponse(status_code=202, content={})
    return JSONResponse(_jsonrpc_err(req_id, -32601, f"Method not found: {method}"), status_code=404)

# ---------------------------------------------------------------------------
# Health (keepalive)
# ---------------------------------------------------------------------------

@app.get("/health")
async def health():
    return {"status": "ok", "service": "opax-mcp", "version": "3.5.0", "ollama": OLLAMA_BASE_URL} # BUMPED