import os
import yaml
import argparse
import subprocess

def convert_md_to_rst(md_content):
    """Convert Markdown content to reStructuredText using Pandoc."""
    try:
        result = subprocess.run(
            ["pandoc", "-f", "markdown", "-t", "rst"],
            input=md_content.encode("utf-8"),
            capture_output=True,
            check=True
        )
        return result.stdout.decode("utf-8")
    except subprocess.CalledProcessError as e:
        print("Error converting Markdown to reStructuredText:", e)
        return md_content  # Falls Pandoc fehlschlägt, nutze das Original als Fallback

def generate_ansible_roles_doc(roles_dir, output_dir):
    """Generates reStructuredText documentation for Ansible roles."""
    if not os.path.exists(output_dir):
        os.makedirs(output_dir)

    for role in os.listdir(roles_dir):
        role_path = os.path.join(roles_dir, role)
        meta_file = os.path.join(role_path, "meta/main.yml")
        readme_file = os.path.join(role_path, "README.md")

        if os.path.exists(meta_file):
            with open(meta_file, "r", encoding="utf-8") as f:
                meta_data = yaml.safe_load(f)

            role_doc = os.path.join(output_dir, f"{role}.rst")
            with open(role_doc, "w", encoding="utf-8") as f:
                # Hauptüberschrift
                f.write(f"{role.capitalize()} Role\n")
                f.write("=" * (len(role) + 7) + "\n\n")

                f.write(f"**Description:** {meta_data.get('description', 'No description available')}\n\n")

                # Unterüberschrift für Variablen
                f.write("Variables\n")
                f.write("---------\n\n")

                for key, value in meta_data.get('galaxy_info', {}).items():
                    f.write(f"- **{key}**: {value}\n")

                # README falls vorhanden konvertieren und einfügen
                if os.path.exists(readme_file):
                    f.write("\nREADME\n")
                    f.write("------\n\n")
                    with open(readme_file, "r", encoding="utf-8") as readme:
                        markdown_content = readme.read()
                        rst_content = convert_md_to_rst(markdown_content)
                        f.write(rst_content)

    print(f"Ansible roles documentation has been generated in {output_dir}")

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Generate documentation for Ansible roles.")
    parser.add_argument("--roles-dir", required=True, help="Directory containing Ansible roles.")
    parser.add_argument("--output-dir", required=True, help="Directory where documentation will be saved.")

    args = parser.parse_args()
    generate_ansible_roles_doc(args.roles_dir, args.output_dir)