import json
from datetime import datetime
import config
import os # Import os for path handling

# Initialize Nextcloud client
# nc = Nextcloud(
#     nextcloud_url=config.NEXTCLOUD_URL,
#     nc_auth_user=config.NEXTCLOUD_USERNAME,
#     nc_auth_pass=config.NEXTCLOUD_PASSWORD
# )

NEXTCLOUD_NOTES_PATH = "/gpu_poor_release_notes.json"
LOCAL_CACHE_FILE = "release_notes.json"

def load_release_notes():
    """Load release notes from Nextcloud with local file fallback."""
    nc = config.get_nextcloud_client() # Use the singleton client
    try:
        # Try to load from Nextcloud
        remote_data = nc.files.download(NEXTCLOUD_NOTES_PATH)
        if remote_data:
            notes = json.loads(remote_data.decode('utf-8'))
            # Ensure the directory for the local cache file exists
            os.makedirs(os.path.dirname(LOCAL_CACHE_FILE) or '.', exist_ok=True)
            # Update local cache
            with open(LOCAL_CACHE_FILE, 'w') as f:
                json.dump(notes, f, indent=2)
            return notes
    except Exception as e:
        print(f"Could not load release notes from Nextcloud: {e}")
        
        # Try local cache
        try:
            with open(LOCAL_CACHE_FILE, 'r') as f:
                return json.load(f)
        except Exception as e:
            print(f"Could not load from local cache: {e}")
    
    # Return empty notes if both attempts fail
    return {
        "last_updated": datetime.now().isoformat(),
        "notes": []
    }

def get_release_notes_html():
    """Generate HTML display of release notes."""
    notes_data = load_release_notes()
    
    html = f"""
    <style>
        .release-notes {{
            font-family: Arial, sans-serif;
            max-width: 800px;
            margin: 0 auto;
        }}
        .release-note {{
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            padding: 15px;
            margin-bottom: 20px;
        }}
        .note-date {{
            font-size: 0.9em;
            color: #888;
            margin-bottom: 8px;
        }}
        .note-content {{
            white-space: pre-wrap;
            line-height: 1.6;
        }}
        .last-updated {{
            font-size: 0.8em;
            color: #666;
            text-align: right;
            margin-top: 20px;
            font-style: italic;
        }}
    </style>
    <div class="release-notes">
    """
    
    # Add notes in reverse chronological order
    for note in sorted(notes_data["notes"], key=lambda x: x["date"], reverse=True):
        html += f"""
        <div class="release-note">
            <div class="note-date">📅 {note["date"]}</div>
            <div class="note-content">{note["content"]}</div>
        </div>
        """
    
    html += f"""
        <div class="last-updated">
            Last updated: {notes_data["last_updated"].split("T")[0]}
        </div>
    </div>
    """
    
    return html