#!/usr/bin/env python3
"""Usage: tools/review-rounds <gitea-url> <owner> <since> <repo>...

Lists per PR created since <since> (ISO date or time) the review rounds of werkrevisor, their verdicts,
the line comments of the bot and the findings that stood only in the result comment,
to see whether a change of the review costs or saves rounds.
Needs GITEA_TOKEN with read access in the environment; it never prints the token.

Example:
  GITEA_TOKEN=… tools/review-rounds https://git.example.org mi 2026-10-09T20:00 werkrevisor werkator
"""
import json
import os
import re
import sys
import urllib.request


def main(argv):
    if len(argv) < 4 or argv[0] in ("-h", "--help"):
        print(__doc__.strip())
        return 0
    base, owner, since, repos = argv[0].rstrip("/"), argv[1], argv[2], argv[3:]
    headers = {"Authorization": "token " + os.environ["GITEA_TOKEN"]}

    def get(path):
        request = urllib.request.Request(f"{base}/api/v1/repos/{owner}/{path}", headers=headers)
        with urllib.request.urlopen(request, timeout=60) as response:
            return json.load(response)

    def pulls(repo):
        page = 1
        while True:
            batch = get(f"{repo}/pulls?state=all&limit=50&page={page}")
            if not batch:
                return
            yield from batch
            page += 1

    for repo in repos:
        for pr in pulls(repo):
            if pr["created_at"] < since:
                continue
            results = [c["body"] for c in get(f"{repo}/issues/{pr['number']}/comments") if "<!-- werkrevisor:" in c["body"]]
            verdicts = [m.group(1) for b in results for m in [re.search(r"werkrevisor-verdict:(\w+)", b)] if m]
            line_comments = sum(r["comments_count"] for r in get(f"{repo}/pulls/{pr['number']}/reviews")
                                if r["user"]["login"] != pr["user"]["login"])
            only_here = [line for b in results for line in re.findall(r"^\d+\. \*\*.*", b, re.M)
                         if "as a line comment" not in line and "still open in" not in line]
            state = "merged" if pr.get("merged") else pr["state"]
            print(f"{repo} #{pr['number']}: {len(results)} round(s) {'→'.join(verdicts) or '-'}, "
                  f"{line_comments} line comment(s), {len(only_here)} finding(s) only in the result comment, {state}")
            for line in only_here:
                print(f"    {line[:150]}")
    return 0


if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))