#!/usr/bin/env python3
"""
Generate fake event data for MongoDB.
Light + configurable via GEN_ROWS. Now also embeds contact PII fields
(contact_name/email/phone) for masking + PII classification demos.
"""

import pymongo
import random
from datetime import datetime, timedelta
import uuid
import os

DB_HOST = "10.0.21.51"
DB_PORT = "27017"
DB_NAME = "supplychain"
COLLECTION_NAME = "events"

TARGET_DOCUMENTS = int(os.getenv("GEN_ROWS", "5000"))
BATCH_SIZE = min(5000, max(500, TARGET_DOCUMENTS))

EVENT_TYPES = ["INSERT", "UPDATE", "DELETE", "CREATE", "MODIFY"]
REGIONS = ["EU", "APAC", "LATAM", "NA", "EMEA"]
SOURCES = ["ERP", "WMS", "CRM", "SCM", "TMS"]

FIRST = ["Sophie", "Liam", "Emma", "Noah", "Julia", "Lucas", "Mila", "Daan", "Anna", "Sem",
         "Eva", "Finn", "Tess", "Bram", "Lotte", "Max", "Sara", "Thijs", "Nina", "Ruben"]
LAST = ["de Vries", "Jansen", "Bakker", "Visser", "Smit", "Meijer", "Mulder", "Bos",
        "Vos", "Peters", "Hendriks", "Dijkstra", "Kok", "Willems", "Maas", "Koning"]
DOMAINS = ["example.com", "mail.nl", "acme-corp.eu", "shopmail.com", "contact.io"]


def _name():
    return f"{random.choice(FIRST)} {random.choice(LAST)}"


def generate_fake_event():
    event_id = str(uuid.uuid4())
    days_ago = random.randint(0, 365)
    ts = datetime.now() - timedelta(days=days_ago, hours=random.randint(0, 23),
                                     minutes=random.randint(0, 59))
    nm = _name()
    return {
        "event_id": event_id,
        "type": random.choice(EVENT_TYPES),
        "region": random.choice(REGIONS),
        "source": random.choice(SOURCES),
        "amount": random.uniform(100.0, 50000.0),
        "ts": ts,
        "contact_name": nm,
        "contact_email": f"{nm.lower().replace(' ', '.')}{random.randint(1, 999)}@{random.choice(DOMAINS)}",
        "contact_phone": f"+31 6 {random.randint(10, 99)} {random.randint(100000, 999999)}",
        "payload": "X" * 500,
    }


def main():
    print(f"Connecting to MongoDB at {DB_HOST}:{DB_PORT}...")
    client = pymongo.MongoClient(f"mongodb://{DB_HOST}:{DB_PORT}/")
    collection = client[DB_NAME][COLLECTION_NAME]
    print(f"Generating {TARGET_DOCUMENTS} events (with PII)... batch={BATCH_SIZE}")
    total_generated = 0
    batch = []
    for i in range(TARGET_DOCUMENTS):
        batch.append(generate_fake_event())
        if len(batch) >= BATCH_SIZE:
            collection.insert_many(batch)
            total_generated += len(batch)
            batch = []
    if batch:
        collection.insert_many(batch)
        total_generated += len(batch)
    client.close()
    print(f"Completed! Generated {total_generated} events.")


if __name__ == "__main__":
    main()