bellsystems-cp/backend/mqtt/router.py

from fastapi import APIRouter, Depends, Query, WebSocket, WebSocketDisconnect
from typing import Optional, List
from auth.models import TokenPayload
from auth.dependencies import require_permission
from mqtt.models import (
    MqttCommandRequest, CommandSendResponse, MqttStatusResponse,
    DeviceMqttStatus, LogListResponse, HeartbeatListResponse,
    CommandListResponse, HeartbeatEntry, AlertEventEntry,
    AlertEventListResponse, BootEventListResponse, PingSampleListResponse,
    DiagnosticsReportListResponse, LatestMetricsResponse,
    LatestDiagnosticsEntry, LatestPingEntry, DeviceReportListResponse,
)
from mqtt.client import mqtt_manager
from mqtt import presence
import database as db
from datetime import datetime, timezone

router = APIRouter(prefix="/api/mqtt", tags=["mqtt"])


@router.get("/status", response_model=MqttStatusResponse)
async def get_all_device_status(
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    heartbeats = await db.get_latest_heartbeats()
    alert_events = await db.get_latest_alert_events()
    alert_by_serial = {a["device_serial"]: a for a in alert_events}
    now = datetime.now(timezone.utc)
    devices = []
    for hb in heartbeats:
        received_str = hb["received_at"]
        try:
            received = datetime.fromisoformat(received_str)
            if received.tzinfo is None:
                received = received.replace(tzinfo=timezone.utc)
            seconds_ago = int((now - received).total_seconds())
        except (ValueError, TypeError):
            seconds_ago = 9999

        alert_event = alert_by_serial.get(hb["device_serial"])

        devices.append(DeviceMqttStatus(
            device_serial=hb["device_serial"],
            online=seconds_ago < 90 and not presence.is_marked_offline(hb["device_serial"]),
            last_heartbeat=HeartbeatEntry(**hb),
            seconds_since_heartbeat=seconds_ago,
            last_alert_event=AlertEventEntry(**alert_event) if alert_event else None,
        ))
    return MqttStatusResponse(
        devices=devices,
        broker_connected=mqtt_manager.connected,
    )


@router.get("/latest-metrics", response_model=LatestMetricsResponse)
async def get_latest_metrics(
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    # Fleet-wide "last known" CPU temp + ping RTT, one query each — used by
    # DeviceList to render optional columns without polling any device.
    # Uptime/firmware/RSSI don't need this: they're already in /mqtt/status.
    diag_reports = await db.get_latest_diagnostics_reports()
    ping_samples = await db.get_latest_ping_samples()
    return LatestMetricsResponse(
        diagnostics=[LatestDiagnosticsEntry(**d) for d in diag_reports],
        pings=[LatestPingEntry(**p) for p in ping_samples],
    )


@router.post("/command/{device_serial}", response_model=CommandSendResponse)
async def send_command(
    device_serial: str,
    body: MqttCommandRequest,
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    command_id = await db.insert_command(
        device_serial=device_serial,
        command_name=body.cmd,
        command_payload={"cmd": body.cmd, "contents": body.contents},
    )

    success = mqtt_manager.publish_command(
        device_serial=device_serial,
        cmd=body.cmd,
        contents=body.contents,
    )

    if not success:
        await db.update_command_response(
            command_id, "error",
            {"error": "MQTT broker not connected"},
        )
        return CommandSendResponse(
            success=False, command_id=command_id,
            message="MQTT broker not connected",
        )

    return CommandSendResponse(
        success=True, command_id=command_id,
        message=f"Command '{body.cmd}' sent to {device_serial}",
    )


@router.get("/logs/{device_serial}", response_model=LogListResponse)
async def get_device_logs(
    device_serial: str,
    level: Optional[str] = Query(None, description="Filter: INFO, WARN, ERROR"),
    min_level: bool = Query(False, description="If true, level is a floor — also includes higher-severity levels"),
    search: Optional[str] = Query(None),
    source: Optional[List[str]] = Query(None, description="Filter by source: log, info. Repeat param to include several."),
    limit: int = Query(100, ge=1, le=1000),
    offset: int = Query(0, ge=0),
    since: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/after this time"),
    until: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/before this time"),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    logs, total = await db.get_logs(
        device_serial, level=level, search=search, source=source,
        min_level=min_level, limit=limit, offset=offset, since=since, until=until,
    )
    return LogListResponse(logs=logs, total=total)


@router.get("/heartbeats/{device_serial}", response_model=HeartbeatListResponse)
async def get_device_heartbeats(
    device_serial: str,
    limit: int = Query(100, ge=1, le=5000),
    offset: int = Query(0, ge=0),
    since: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/after this time"),
    until: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/before this time"),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    heartbeats, total = await db.get_heartbeats(
        device_serial, limit=limit, offset=offset, since=since, until=until,
    )
    return HeartbeatListResponse(heartbeats=heartbeats, total=total)


@router.get("/commands/{device_serial}", response_model=CommandListResponse)
async def get_device_commands(
    device_serial: str,
    limit: int = Query(100, ge=1, le=1000),
    offset: int = Query(0, ge=0),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    commands, total = await db.get_commands(
        device_serial, limit=limit, offset=offset,
    )
    return CommandListResponse(commands=commands, total=total)


@router.get("/alert-events/{device_serial}", response_model=AlertEventListResponse)
async def get_device_alert_events(
    device_serial: str,
    limit: int = Query(100, ge=1, le=1000),
    offset: int = Query(0, ge=0),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    events, total = await db.get_alert_events(
        device_serial, limit=limit, offset=offset,
    )
    return AlertEventListResponse(events=events, total=total)


@router.get("/boot-events/{device_serial}", response_model=BootEventListResponse)
async def get_device_boot_events(
    device_serial: str,
    limit: int = Query(100, ge=1, le=2000),
    offset: int = Query(0, ge=0),
    since: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/after this time"),
    until: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/before this time"),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    events, total = await db.get_boot_events(
        device_serial, limit=limit, offset=offset, since=since, until=until,
    )
    return BootEventListResponse(events=events, total=total)


@router.get("/ping-samples/{device_serial}", response_model=PingSampleListResponse)
async def get_device_ping_samples(
    device_serial: str,
    limit: int = Query(200, ge=1, le=5000),
    offset: int = Query(0, ge=0),
    since: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/after this time"),
    until: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/before this time"),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    samples, total = await db.get_ping_samples(
        device_serial, limit=limit, offset=offset, since=since, until=until,
    )
    return PingSampleListResponse(samples=samples, total=total)


@router.get("/diagnostics-reports/{device_serial}", response_model=DiagnosticsReportListResponse)
async def get_device_diagnostics_reports(
    device_serial: str,
    limit: int = Query(200, ge=1, le=5000),
    offset: int = Query(0, ge=0),
    since: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/after this time"),
    until: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/before this time"),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    reports, total = await db.get_diagnostics_reports(
        device_serial, limit=limit, offset=offset, since=since, until=until,
    )
    return DiagnosticsReportListResponse(reports=reports, total=total)


@router.get("/reports/{device_serial}", response_model=DeviceReportListResponse)
async def get_device_reports(
    device_serial: str,
    limit: int = Query(200, ge=1, le=2000),
    offset: int = Query(0, ge=0),
    since: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/after this time"),
    until: Optional[datetime] = Query(None, description="ISO timestamp — only rows at/before this time"),
    _user: TokenPayload = Depends(require_permission("mqtt", "view")),
):
    """Critical, unsolicited board-initiated events from control/reports
    (currently only bell_overload). History/audit only — the tablets are the
    real-time consumer of this data, not the console."""
    reports, total = await db.get_reports(
        device_serial, limit=limit, offset=offset, since=since, until=until,
    )
    return DeviceReportListResponse(reports=reports, total=total)


@router.websocket("/ws")
async def mqtt_websocket(websocket: WebSocket):
    """Live MQTT data stream. Auth via query param: ?token=JWT"""
    token = websocket.query_params.get("token")
    if not token:
        await websocket.close(code=4001, reason="Missing token")
        return

    try:
        from auth.utils import decode_access_token
        from sqlalchemy import select
        from database.postgres import AsyncSessionLocal
        from staff.orm import Staff

        payload = decode_access_token(token)
        role = payload.get("role", "")

        # sysadmin and admin always have MQTT access
        if role not in ("sysadmin", "admin"):
            user_sub = payload.get("sub", "")
            async with AsyncSessionLocal() as session:
                result = await session.execute(
                    select(Staff).where(Staff.id == user_sub).limit(1)
                )
                staff = result.scalar_one_or_none()

            if staff is None:
                await websocket.close(code=4003, reason="User not found")
                return

            perms = staff.permissions or {}
            if not perms.get("mqtt", {}).get("access", False):
                await websocket.close(code=4003, reason="MQTT access denied")
                return
    except Exception:
        await websocket.close(code=4001, reason="Invalid token")
        return

    await websocket.accept()
    mqtt_manager.add_ws_subscriber(websocket)

    try:
        while True:
            await websocket.receive_text()
    except WebSocketDisconnect:
        pass
    finally:
        mqtt_manager.remove_ws_subscriber(websocket)