#!/usr/bin/env python3
import os
import re
import sys
from pathlib import Path

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

from zerver.openapi.merge_api_changelogs import get_feature_level


def get_build_url_from_environment() -> str:
    server = os.environ["GITHUB_SERVER_URL"]
    repo = os.environ["GITHUB_REPOSITORY"]
    run_id = os.environ["GITHUB_RUN_ID"]
    return f"{server}/{repo}/actions/runs/{run_id}"


def get_changed_api_endpoints() -> list[str]:
    changelog_path = Path("api_docs/changelog.md")
    feature_level_pattern = re.compile(r"\*\*Feature level \d+\*\*")
    link_pattern = re.compile(r"(\[[^\]]+\]\([^)]+\))")

    current_feature_level_found = False
    endpoints = []

    with open(changelog_path) as file:
        for line in file:
            if re.fullmatch(feature_level_pattern, line.strip()):
                if current_feature_level_found:
                    break
                current_feature_level_found = True
                continue

            if current_feature_level_found and line.strip().startswith("*"):
                endpoints.extend(link_pattern.findall(line.split(":", 1)[0]))

    return endpoints


if __name__ == "__main__":
    branch = os.environ.get("GITHUB_REF", "unknown branch").split("/")[-1]
    topic = f"{branch} failing"
    build_url = get_build_url_from_environment()
    github_actor = os.environ.get("GITHUB_ACTOR", "unknown user")

    feature_level = get_feature_level(update_feature_level=False)
    endpoints = get_changed_api_endpoints()
    topic = f"new feature level: {feature_level}"
    endpoints_string = ", ".join(endpoints)

    content = f"[Build]({build_url}) triggered by {github_actor} on branch `{branch}` has updated the API documentation for the following endpoints: {endpoints_string}."
    print(f"topic={topic}\ncontent={content}")