import re
import json
import subprocess

def get_last_commit_info():
    # Format: subject%n%ISO 8601 date
    result = subprocess.run(
        ["git", "log", "-1", "--pretty=%s%n%cI"],
        stdout=subprocess.PIPE,
        text=True,
        check=True
    )
    message, date = result.stdout.strip().split("\n", 1)
    return message, date

def parse_blog_links(md_text):
    pattern = re.compile(r"- \[(.*?)\]\((.*?)\)")
    return [{"title": title, "url": url} for title, url in pattern.findall(md_text)]

def main():
    with open("README.md", "r", encoding="utf-8") as f:
        md_content = f.read()

    blog_entries = parse_blog_links(md_content)
    last_commit_msg, commit_date = get_last_commit_info()

    for entry in blog_entries:
        entry["last_commit"] = last_commit_msg
        entry["commit_date"] = commit_date

    with open("index.json", "w", encoding="utf-8") as f:
        json.dump(blog_entries, f, indent=2)

if __name__ == "__main__":
    main()