#!/usr/bin/env python3
"""
Cariflex - OpenLEADR VEN (Virtual End Node)
Reçoit les signaux DSR du TSO/DSO et les transmet à FlexMeasures.
"""

import asyncio
import json
import logging
from datetime import datetime, timezone, timedelta
from openleadr import OpenADRClient, enable_default_logging
import requests
import re

# Configuration
FM_HOST = "https://cariflex.digitribe.fr"
FM_EMAIL = "admin@digitribe.fr"
FM_PASSWORD = "Digitribe972"
VEN_NAME = "Cariflex-VEN"
VTN_URL = "http://localhost:8080"  # URL du VTN OpenADR (à configurer)

# Sensors IDs dans FM
SENSOR_CONSUMPTION_PRICE = 84
SENSOR_PRODUCTION_PRICE = 85
SENSOR_PV_FORECAST = 41  # PV_01
SENSOR_BAT_SOC = 51  # Bat_01

# Setup logging
enable_default_logging()
logger = logging.getLogger("openleadr")

class CariflexVEN:
    """OpenLEADR VEN pour Cariflex EMS."""
    
    def __init__(self):
        self.client = OpenADRClient(
            vad_name=VEN_NAME,
            vtn_url=VTN_URL,
        )
        self.fm_session = None
        
    def fm_login(self):
        """Login to FlexMeasures."""
        self.fm_session = requests.Session()
        self.fm_session.verify = False
        r = self.fm_session.get(f"{FM_HOST}/login")
        match = re.search(r'<input[^>]*csrf_token[^>]*value="([^"]+)"', r.text)
        if match:
            csrf = match.group(1)
            r = self.fm_session.post(f"{FM_HOST}/login", data={
                "email": FM_EMAIL, "password": FM_PASSWORD,
                "csrf_token": csrf, "remember": "y"
            }, allow_redirects=True)
            return "dashboard" in r.url
        return False
    
    def post_sensor_data(self, sensor_id, values, unit, start, duration="PT1H"):
        """Post sensor data to FlexMeasures."""
        if not self.fm_session:
            if not self.fm_login():
                return False
        
        r = self.fm_session.post(
            f"{FM_HOST}/api/v3_0/sensors/{sensor_id}/data",
            json={"values": values, "start": start, "duration": duration, "unit": unit},
            timeout=30
        )
        return r.status_code in [200, 201, 202]
    
    async def handle_dsr_event(self, event):
        """
        Handle DSR event from TSO/DSO.
        
        Event format:
        {
            "event_id": "...",
            "modification_number": 0,
            "event_status": "active",
            "created_date_time": "...",
            "event_descriptor": {...},
            "active_period": {...},
            "event_signals": [
                {
                    "signal_name": "LOAD_CONTROL",
                    "signal_type": "X_LOAD_CONTROL",
                    "intervals": [
                        {"duration": "PT1H", "signal_payload": 0.5}
                    ]
                }
            ]
        }
        """
        logger.info(f"Received DSR event: {event.get('event_id')}")
        
        for signal in event.get("event_signals", []):
            signal_name = signal.get("signal_name")
            signal_type = signal.get("signal_type")
            
            for interval in signal.get("intervals", []):
                payload = interval.get("signal_payload")
                duration = interval.get("duration", "PT1H")
                
                # Convert payload to price signal
                # payload: 0.0 = low price, 1.0 = high price
                if signal_name in ["LOAD_CONTROL", "PRICE"]:
                    # Calculate price based on payload
                    base_price = 100  # EUR/MWh
                    price = base_price * (0.5 + payload)  # 50-150 EUR/MWh
                    
                    # Post to FM
                    now = datetime.now(timezone.utc)
                    success = self.post_sensor_data(
                        SENSOR_CONSUMPTION_PRICE,
                        [round(price, 2)],
                        "EUR/MWh",
                        now.isoformat(),
                        duration
                    )
                    logger.info(f"Posted price {price} EUR/MWh: {success}")
                
                elif signal_name == "RENEWABLE_GENERATION":
                    # Adjust PV forecast based on DSR signal
                    # payload: 0.0 = no PV, 1.0 = max PV
                    pv_factor = payload
                    # TODO: Adjust PV forecast
                    logger.info(f"PV factor: {pv_factor}")
        
        return "OK"
    
    async def handle_s2_message(self, message):
        """
        Handle S2 message from TSO/DSO.
        
        S2 messages are used for real-time control of flexible resources.
        """
        logger.info(f"Received S2 message: {message.get('message_type')}")
        
        msg_type = message.get("message_type")
        
        if msg_type == "FRBC.ActuatorStatus":
            # Update actuator status in FM
            pass
        elif msg_type == "FRBC.Instruction":
            # Execute instruction in FM
            pass
        elif msg_type == "FRBC.SystemDescription":
            # Update system description in FM
            pass
        
        return "OK"
    
    async def run(self):
        """Run the OpenLEADR VEN."""
        logger.info(f"Starting Cariflex VEN: {VEN_NAME}")
        
        # Register event handler
        self.client.add_handler("on_event", self.handle_dsr_event)
        
        # Login to FM
        if self.fm_login():
            logger.info("Logged in to FlexMeasures")
        else:
            logger.error("Failed to login to FlexMeasures")
        
        # Start the VEN
        await self.client.run()

if __name__ == "__main__":
    ven = CariflexVEN()
    asyncio.run(ven.run())