import sys, os, random, json

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from kafka import KafkaConsumer, KafkaProducer
from shared.events import BOOTSTRAP_SERVERS, TOPIC_ORDERS, TOPIC_PAYMENTS, make_event

def simulate_payment(amount: float) -> bool:
    return random.random() > 0.1

def run():
    consumer = KafkaConsumer(
        TOPIC_ORDERS,
        bootstrap_servers=BOOTSTRAP_SERVERS,
        group_id="payment_service",
        auto_offset_reset="latest",
        value_deserializer=lambda v: json.loads(v.decode("utf-8"))
    )

    producer = KafkaProducer(
        bootstrap_servers=BOOTSTRAP_SERVERS,
        key_serializer=str.encode,
        value_serializer=lambda v: json.dumps(v).encode(),
        acks="all"
    )

    print("[PAYMENT SERVICE] Service de paiement démarré, en attente d'évènements...")

    for message in consumer:
        event = message.value

        if event["type"] != "order_created":
            continue

        payload = event["payload"]
        order_id = payload["order_id"]
        restaurant_id = payload["restaurant_id"]
        amount = payload["total_amount"]

        print(f"[PAYMENT SERVICE] Traitement en cours : commande {order_id}, total {amount}€")

        if simulate_payment(amount):
            result = make_event("payment.confirmed", {
                "order_id": order_id,
                "customer_id": payload["customer_id"],
                "restaurant_id": restaurant_id,
                "amount": amount
            })
            print(f"[PAYMENT SERVICE] Paiement confirmé pour la commande {order_id}")
        else:
            result = make_event("payment.failed", {
                "order_id": order_id,
                "customer_id": payload["customer_id"],
                "restaurant_id": restaurant_id,
                "amount": amount
            })
            print(f"[PAYMENT SERVICE] Paiement échoué pour la commande {order_id}")

        producer.send(
            topic=TOPIC_PAYMENTS,
            key=str(restaurant_id),
            value=result
        )
        producer.flush()

if __name__ == "__main__":
    run()