from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from datetime import datetime
from typing import Dict, Any

from backend.database import get_db
from backend.services.snapshot import emit_status_snapshot

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


@router.get("/unit/{unit_id}")
def get_unit_detail(unit_id: str, db: Session = Depends(get_db)):
    """
    Returns detailed data for a single unit.
    """
    snapshot = emit_status_snapshot()

    if unit_id not in snapshot["units"]:
        raise HTTPException(status_code=404, detail=f"Unit {unit_id} not found")

    unit_data = snapshot["units"][unit_id]

    # Mock coordinates for now (will be replaced with real data)
    mock_coords = {
        "BE1234": {"lat": 37.7749, "lon": -122.4194, "location": "San Francisco, CA"},
        "BE5678": {"lat": 34.0522, "lon": -118.2437, "location": "Los Angeles, CA"},
        "BE9012": {"lat": 40.7128, "lon": -74.0060, "location": "New York, NY"},
        "BE3456": {"lat": 41.8781, "lon": -87.6298, "location": "Chicago, IL"},
        "BE7890": {"lat": 29.7604, "lon": -95.3698, "location": "Houston, TX"},
    }

    coords = mock_coords.get(unit_id, {"lat": 39.8283, "lon": -98.5795, "location": "Unknown"})

    return {
        "id": unit_id,
        "status": unit_data["status"],
        "age": unit_data["age"],
        "last_seen": unit_data["last"],
        "last_file": unit_data.get("fname", ""),
        "deployed": unit_data["deployed"],
        "note": unit_data.get("note", ""),
        "coordinates": coords
    }