import json
import sys
from collections import Counter
from urllib.parse import parse_qs


def main(path):
    paths, referrers, countries, utm_sources = (
        Counter(), Counter(), Counter(), Counter()
    )
    total = 0
    with open(path) as f:
        for line in f:
            line = line.strip()
            if not line:
                continue
            entry = json.loads(line)
            total += 1
            paths[entry.get("path", "")] += 1
            referrers[entry.get("referrer") or "(direct)"] += 1
            countries[entry.get("country") or "(unknown)"] += 1
            qs = parse_qs(entry.get("query", ""))
            if "utm_source" in qs:
                utm_sources[qs["utm_source"][0]] += 1

    print(f"Total logged page views: {total}\n")
    for label, counter in [
        ("Top paths", paths), ("Top referrers", referrers),
        ("Countries", countries), ("UTM sources", utm_sources),
    ]:
        print(f"{label}:")
        for key, count in counter.most_common(10):
            print(f"  {count:>5}  {key}")
        print()


if __name__ == "__main__":
    main(sys.argv[1] if len(sys.argv) > 1 else "logs/visits.jsonl")