import os
import requests
import re
from bs4 import BeautifulSoup
import subprocess
import time
import logging

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# === Configuration ===
REDMINE_URL = "https://redmine.maketank.net"  # e.g., https://redmine.example.com
REDMINE_API_KEY = "62120b7ed6bf84023b2a1d7d5a265cf172f8d607"
PROJECT_ID = "bastelstube"  # e.g., "my-project"

GITEA_WIKI_URL = "https://git.maketank.net/chaos/spielplatz.wiki.git"  # Gitea wiki Git URL
GITEA_USERNAME = "do"
GITEA_TOKEN = "2d2be00637182c6d5411512f456218ee59fa1f81"  # Use a personal access token

# Optional: Gitea API for creating pages (if you want to use it instead of Git)
# GITEA_API_URL = "https://gitea.example.com/api/v1"

# === Functions ===

def redmine_get_wiki_pages():
    """Get all wiki pages from Redmine project"""
    # First get the list of pages
    index_url = f"{REDMINE_URL}/projects/{PROJECT_ID}/wiki/index.xml"
    headers = {"X-Redmine-API-Key": REDMINE_API_KEY}
    response = requests.get(index_url, headers=headers)
    response.raise_for_status()

    soup = BeautifulSoup(response.content, "xml")
    pages = []

    # Get all page titles from the index
    for page in soup.find_all("wiki_page"):
        title = page.find("title").text
        logger.info(f"Found page: {title}")
        
        # Fetch individual page content
        page_url = f"{REDMINE_URL}/projects/{PROJECT_ID}/wiki/{title}.xml"
        try:
            page_response = requests.get(page_url, headers=headers)
            page_response.raise_for_status()
            
            page_soup = BeautifulSoup(page_response.content, "xml")
            content = page_soup.find("text").text if page_soup.find("text") else ""
            
            pages.append({"title": title, "content": content})
            logger.info(f"Fetched content for: {title}")
        except Exception as e:
            logger.warning(f"Failed to fetch content for page '{title}': {e}")
            # Add empty content if fetch fails
            pages.append({"title": title, "content": ""})

    return pages


def redmine_markup_to_markdown(content):
    """Convert Redmine wiki markup (textile) to Markdown"""
    # Replace Redmine-specific syntax to Markdown
    
    # Handle child_pages macro - remove it since we're importing all pages
    content = re.sub(r'\{\{child_pages(?:\([^)]*\))?\}\}', '', content)
    
    # Convert bold (strong in textile)
    content = re.sub(r'\*\*(.*?)\*\*', r'**\1**', content)
    content = re.sub(r'\*(.*?)\*', r'*\1*', content)

    # Convert headings
    content = re.sub(r'^h1\.(.*?)$', r'# \1', content, flags=re.MULTILINE)
    content = re.sub(r'^h2\.(.*?)$', r'## \1', content, flags=re.MULTILINE)
    content = re.sub(r'^h3\.(.*?)$', r'### \1', content, flags=re.MULTILINE)
    content = re.sub(r'^h4\.(.*?)$', r'#### \1', content, flags=re.MULTILINE)
    content = re.sub(r'^h5\.(.*?)$', r'##### \1', content, flags=re.MULTILINE)
    content = re.sub(r'^h6\.(.*?)$', r'###### \1', content, flags=re.MULTILINE)

    # Convert lists
    content = re.sub(r'^\s*\* (.*?)$', r'- \1', content, flags=re.MULTILINE)
    content = re.sub(r'^\s*\# (.*?)$', r'1. \1', content, flags=re.MULTILINE)

    # Convert links - handle both [[page]] and [page] syntax
    content = re.sub(r'\[\[(.*?)\]\]', r'[\1](\1)', content)  # Simple link
    content = re.sub(r'\[(.*?)\](.*?)\]', r'[\1](\2)', content)  # [text](url)
    
    # Convert images - handle !image! and ![alt](image)
    content = re.sub(r'!\[(.*?)\]\((.*?)\)', r'![](\2)', content)
    content = re.sub(r'!(.*?)!', r'![](\\1)', content)

    # Convert code blocks
    content = re.sub(r'<pre>(.*?)</pre>', r'```python\n\1\n```', content, flags=re.DOTALL)
    
    # Convert inline code
    content = re.sub(r'\{\{(.*?)\}\}', r'`\1`', content)

    # Remove HTML tags (if any)
    content = re.sub(r'<[^>]+>', '', content)

    # Handle textile-specific elements like blockquotes
    content = re.sub(r'^bq\.(.*?)$', r'> \1', content, flags=re.MULTILINE)

    return content


def clone_or_init_wiki_repo(repo_url, local_dir):
    """Clone or initialize the Gitea wiki repo"""
    if not os.path.exists(local_dir):
        logger.info(f"Cloning Gitea wiki repository: {repo_url}")
        subprocess.run(["git", "clone", repo_url, local_dir], check=True)
    else:
        logger.info(f"Using existing local wiki repo: {local_dir}")
        os.chdir(local_dir)
        subprocess.run(["git", "pull"], check=True)
    return local_dir


def push_to_gitea_wiki(local_dir, pages):
    """Add pages as Markdown files and push to Gitea"""
    # Remove all existing files in the repo (except .git folder)
    for item in os.listdir(local_dir):
        if item != '.git':
            item_path = os.path.join(local_dir, item)
            if os.path.isfile(item_path):
                os.remove(item_path)
            elif os.path.isdir(item_path):
                import shutil
                shutil.rmtree(item_path)

    # Create pages as .md files
    for page in pages:
        filename = f"{page['title'].replace(' ', '_')}.md"
        filepath = os.path.join(local_dir, filename)

        # Convert content to Markdown
        markdown_content = redmine_markup_to_markdown(page['content'])

        # Write to file
        with open(filepath, 'w', encoding='utf-8') as f:
            f.write(f"# {page['title']}\n\n")
            f.write(markdown_content)

        logger.info(f"Saved page: {filename}")

    # Add, commit, and push
    os.chdir(local_dir)
    subprocess.run(["git", "add", "."], check=True)
    subprocess.run(["git", "commit", "-m", "ImportRedminewikipages"], check=True)
    subprocess.run(["git", "push", "origin", "main"], check=True)

    logger.info("✅ Wiki pages pushed to Gitea!")


def main():
    # Step 1: Get wiki pages from Redmine
    logger.info("Fetching Redmine wiki pages...")
    pages = redmine_get_wiki_pages()

    # Step 2: Prepare local directory for Gitea wiki
    local_wiki_dir = "gitea_wiki_clone"
    clone_or_init_wiki_repo(GITEA_WIKI_URL, local_wiki_dir)

    # Step 3: Push pages to Gitea
    push_to_gitea_wiki(local_wiki_dir, pages)


if __name__ == "__main__":
    main()