"""
Sound Level Meter UI Router

Provides endpoints for SLM dashboard cards, detail pages, and real-time data.
"""

from fastapi import APIRouter, Depends, HTTPException, Request
from fastapi.responses import HTMLResponse
from fastapi.templating import Jinja2Templates
from sqlalchemy.orm import Session
from datetime import datetime
import httpx
import logging
import os

from backend.database import get_db
from backend.models import RosterUnit

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/slm", tags=["slm-ui"])
templates = Jinja2Templates(directory="templates")

SLMM_BASE_URL = os.getenv("SLMM_BASE_URL", "http://172.19.0.1:8100")


@router.get("/{unit_id}", response_class=HTMLResponse)
async def slm_detail_page(request: Request, unit_id: str, db: Session = Depends(get_db)):
    """Sound level meter detail page with controls."""

    # Get roster unit
    unit = db.query(RosterUnit).filter_by(id=unit_id).first()
    if not unit or unit.device_type != "slm":
        raise HTTPException(status_code=404, detail="Sound level meter not found")

    return templates.TemplateResponse("slm_detail.html", {
        "request": request,
        "unit": unit,
        "unit_id": unit_id
    })


@router.get("/api/{unit_id}/summary")
async def get_slm_summary(unit_id: str, db: Session = Depends(get_db)):
    """Get SLM summary data for dashboard card."""

    # Get roster unit
    unit = db.query(RosterUnit).filter_by(id=unit_id).first()
    if not unit or unit.device_type != "slm":
        raise HTTPException(status_code=404, detail="Sound level meter not found")

    # Try to get live status from SLMM
    status_data = None
    try:
        async with httpx.AsyncClient(timeout=3.0) as client:
            response = await client.get(f"{SLMM_BASE_URL}/api/nl43/{unit_id}/status")
            if response.status_code == 200:
                status_data = response.json().get("data")
    except Exception as e:
        logger.warning(f"Failed to get SLM status for {unit_id}: {e}")

    return {
        "unit_id": unit_id,
        "device_type": "slm",
        "deployed": unit.deployed,
        "model": unit.slm_model or "NL-43",
        "location": unit.address or unit.location,
        "coordinates": unit.coordinates,
        "note": unit.note,
        "status": status_data,
        "last_check": unit.slm_last_check.isoformat() if unit.slm_last_check else None,
    }


@router.get("/partials/{unit_id}/card", response_class=HTMLResponse)
async def slm_dashboard_card(request: Request, unit_id: str, db: Session = Depends(get_db)):
    """Render SLM dashboard card partial."""

    summary = await get_slm_summary(unit_id, db)

    return templates.TemplateResponse("partials/slm_card.html", {
        "request": request,
        "slm": summary
    })


@router.get("/partials/{unit_id}/controls", response_class=HTMLResponse)
async def slm_controls_partial(request: Request, unit_id: str, db: Session = Depends(get_db)):
    """Render SLM control panel partial."""

    unit = db.query(RosterUnit).filter_by(id=unit_id).first()
    if not unit or unit.device_type != "slm":
        raise HTTPException(status_code=404, detail="Sound level meter not found")

    # Get current status from SLMM
    measurement_state = None
    battery_level = None
    try:
        async with httpx.AsyncClient(timeout=3.0) as client:
            # Get measurement state
            state_response = await client.get(
                f"{SLMM_BASE_URL}/api/nl43/{unit_id}/measurement-state"
            )
            if state_response.status_code == 200:
                measurement_state = state_response.json().get("measurement_state")

            # Get battery level
            battery_response = await client.get(
                f"{SLMM_BASE_URL}/api/nl43/{unit_id}/battery"
            )
            if battery_response.status_code == 200:
                battery_level = battery_response.json().get("battery_level")
    except Exception as e:
        logger.warning(f"Failed to get SLM control data for {unit_id}: {e}")

    return templates.TemplateResponse("partials/slm_controls.html", {
        "request": request,
        "unit_id": unit_id,
        "unit": unit,
        "measurement_state": measurement_state,
        "battery_level": battery_level,
        "is_measuring": measurement_state == "Start"
    })