#!/usr/bin/env python3
"""Add **Status:** Active Documentation to docs that have **Last Updated:** but no **Status:** in first 20 lines."""
import re
import sys

STATUS_LINE = "**Status:** Active Documentation\n"


def add_status(path: str) -> bool:
    try:
        with open(path, "r", encoding="utf-8", errors="replace") as f:
            lines = f.readlines()
    except Exception as e:
        print(f"Read error {path}: {e}", file=sys.stderr)
        return False
    if not lines:
        return False
    first_20 = "".join(lines[:20])
    if "**Status:**" in first_20 or "Status:" in first_20:
        return False
    if "**Last Updated:**" not in first_20:
        return False
    # Find the line index of **Last Updated:** and insert Status after it (or after Document Version if present)
    insert_after = None
    for i, line in enumerate(lines[:20]):
        if "**Last Updated:**" in line:
            insert_after = i
            break
    if insert_after is None:
        return False
    # If next line is **Document Version:**, insert after that
    if insert_after + 1 < len(lines) and "**Document Version:**" in lines[insert_after + 1]:
        insert_after += 1
    # Insert Status line after insert_after
    new_lines = lines[: insert_after + 1] + [STATUS_LINE] + lines[insert_after + 1 :]
    try:
        with open(path, "w", encoding="utf-8", newline="\n") as f:
            f.writelines(new_lines)
    except Exception as e:
        print(f"Write error {path}: {e}", file=sys.stderr)
        return False
    return True


def main():
    paths = [p.strip() for p in sys.stdin if p.strip()]
    count = 0
    for path in paths:
        if add_status(path):
            count += 1
            print(path)
    print(f"Added Status to {count} files.", file=sys.stderr)
    return 0


if __name__ == "__main__":
    sys.exit(main())