"""
REST API for accessing processed electricity price and network data.
"""

import sys
from pathlib import Path
from fastapi import FastAPI, HTTPException

# Add project root to sys.path
project_root = str(Path(__file__).parent.parent)
if project_root not in sys.path:
    sys.path.append(project_root)

from utils import database as db
from utils.config_loader import settings

app = FastAPI(
    title="Strompreis API",
    description="Provides access to cleaned and joined electricity price, network, and weather data."
)

@app.get("/current-price")
async def get_current_price():
    """
    Returns the most recent price record from the Gold (combined) layer.
    """
    try:
        with db.get_connection() as con:
            res = con.execute(
                "SELECT timestamp, price FROM combined ORDER BY timestamp DESC LIMIT 1"
            ).fetchone()
            
            if not res:
                raise HTTPException(status_code=404, detail="No data available")
            
            return {
                "timestamp": res[0],
                "price_eur_mwh": res[1],
                "price_ct_kwh": round(res[1] / 10, 2)
            }
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Database error: {str(e)}")

@app.get("/status")
async def get_status():
    """Returns basic system configuration and status."""
    return {
        "region": settings.smard.region,
        "database": settings.database.path,
        "status": "operational"
    }