# /// script
# requires-python = ">=3.14"
# dependencies = [
#     "mistune>=3.2.0",
#     "requests>=2.32.5",
#     "sulguk>=0.11.1",
# ]
# ///
from __future__ import annotations

import json
import os
from pathlib import Path
import re

import mistune
import requests
import sulguk

repo = os.environ["REPO"]
bot_token = os.environ["TELEGRAM_BOT_TOKEN"]
chat_id = os.environ["TELEGRAM_CHAT_ID"]

event_path = Path(os.environ["GITHUB_EVENT_PATH"])
event = json.loads(event_path.read_text(encoding="utf-8"))

ref = event.get("ref") or ""
branch = ref.removeprefix("refs/heads/") if ref.startswith("refs/heads/") else ref
commits = list(event.get("commits") or [])
head_commit = event.get("head_commit")
if not commits and head_commit:
    commits = [head_commit]

PULL_RE = re.compile(rf"(https://github.com/{repo}/pull/(\d+))")
PULL_NUM_RE = re.compile(r"\(#(\d+)\)")


def _short_sha(value: str) -> str:
    return value[:7] if value else ""


def _commit_line(commit: dict[str, object]) -> str:
    full_sha = str(commit.get("id") or "")
    sha = _short_sha(full_sha)
    message = str(commit.get("message") or "").splitlines()[0].strip()
    message = PULL_RE.sub(r"[#\2](\1)", message)
    message = PULL_NUM_RE.sub(
        rf"([#\1](https://github.com/{repo}/pull/\1))", message
    )
    url = f"https://github.com/{repo}/commit/{full_sha or sha}"
    return f"- [{sha}]({url}) {message}"


lines: list[str] = []
if commits:
    max_commits = 10
    lines.extend(_commit_line(commit) for commit in commits[:max_commits])
    if len(commits) > max_commits:
        lines.append(f"- ...and {len(commits) - max_commits} more")

header = f"push **{repo} {branch}**".strip()
parts = [header]
if lines:
    parts.append("\n".join(lines))

message = "\n\n".join(part for part in parts if part)

html = mistune.html(message)
rendered = sulguk.transform_html(html)

payload = {
    "chat_id": chat_id,
    "text": rendered.text,
    "entities": rendered.entities,
    "link_preview_options": {"is_disabled": True},
}
resp = requests.post(
    f"https://api.telegram.org/bot{bot_token}/sendMessage", json=payload
)
resp.raise_for_status()
print(f"sent to {chat_id}")