import requests
import os
from datetime import datetime
from feedgen.feed import FeedGenerator
from feedgen.entry import FeedEntry

API_BASE_URL = "https://repebblesearch.com/api/v1/apps"
OUTPUT_FOLDER = "feeds"

def format_description(text):
    """Convert release notes text to HTML with paragraph and list support."""
    if not text:
        return ""
    
    html = ""
    lines = text.split("\n")
    in_list = False
    
    for line in lines:
        line = line.strip()
        if not line:
            if in_list:
                html += "</ul>"
                in_list = False
            continue
        
        # Check if line is a list item (starts with -, *, or •)
        if line.startswith(("-", "*", "•")):
            if not in_list:
                html += "<ul>"
                in_list = True
            item_text = line[1:].strip()
            html += f"<li>{item_text}</li>"
        else:
            if in_list:
                html += "</ul>"
                in_list = False
            html += f"<p>{line}</p>"
    
    if in_list:
        html += "</ul>"
    
    return html

def create_description_with_screenshots(app_data):
    """Build description with screenshots on a single line, then release notes."""
    description = ""
    
    # Add screenshots on a single line at the top
    screenshots = app_data.get("screenshots", [])
    if screenshots:
        screenshot_html = '<div style="display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: nowrap; overflow-x: auto;">'
        for idx, screenshot in enumerate(screenshots, 1):
            url = screenshot.get("url", "")
            width = screenshot.get("width", "auto")
            height = screenshot.get("height", "auto")
            hardware = screenshot.get("hardware", "")
            
            label = f"Screenshot {idx}"
            if hardware:
                label += f" ({hardware})"
            
            screenshot_html += f'<img src="{url}" alt="{label}" title="{label}" width="{width}" height="{height}" style="max-height: 300px; flex-shrink: 0;" />'
        
        screenshot_html += '</div>'
        description += screenshot_html
    
    # Add release notes below screenshots
    changelog = app_data.get("changelog", [])
    if changelog:
        for entry in changelog:
            version = entry.get("version", "Unknown")
            published_date = entry.get("published_date", "")
            release_notes = entry.get("release_notes", "")
            
            # Format the date
            if published_date:
                try:
                    date_obj = datetime.fromisoformat(published_date.replace('Z', '+00:00'))
                    formatted_date = date_obj.strftime("%Y-%m-%d %H:%M UTC")
                except:
                    formatted_date = published_date
            else:
                formatted_date = "Unknown"
            
            description += f"<h4>Version {version}</h4>"
            description += f"<em>Released: {formatted_date}</em><br/>"
            description += format_description(release_notes)
    else:
        # Fallback to latest_release_notes
        latest_notes = app_data.get("latest_release_notes", "")
        if latest_notes:
            description += format_description(latest_notes)
    
    return description

def fetch_apps(query, platform="basalt"):
    """Fetch apps from the Pebble Search API."""
    params = {
        "query": query,
        "platform": platform,
        "limit": 100
    }
    
    try:
        response = requests.get(API_BASE_URL, params=params)
        response.raise_for_status()
        data = response.json()
        return data.get("apps", [])
    except requests.exceptions.RequestException as e:
        print(f"Error fetching apps for query '{query}': {e}")
        return []

def create_rss_feed(filename, title, description, apps):
    """Create an RSS feed from app data."""
    fg = FeedGenerator()
    fg.title(title)
    fg.link(href="https://repebblesearch.com", rel="alternate")
    fg.description(description)
    fg.language("en")
    
    for app in apps:
        fe = fg.add_entry()
        
        app_title = app.get("title", "Unknown App")
        app_id = app.get("uuid", "")
        app_url = f"https://repebblesearch.com/app/{app_id}" if app_id else "https://repebblesearch.com"
        
        fe.title(app_title)
        fe.link(href=app_url)
        fe.guid(app_url)
        
        # Build description with screenshots and release notes
        description_html = create_description_with_screenshots(app)
        fe.description(description_html)
        
        # Add enclosures for screenshots (for readers that support them)
        screenshots = app.get("screenshots", [])
        for screenshot in screenshots:
            url = screenshot.get("url", "")
            if url:
                fe.enclosure(url=url, type="image/png")
        
        # Set publication date from latest changelog entry or fallback
        pub_date = None
        changelog = app.get("changelog", [])
        if changelog and len(changelog) > 0:
            pub_date_str = changelog[0].get("published_date", "")
            if pub_date_str:
                try:
                    pub_date = datetime.fromisoformat(pub_date_str.replace('Z', '+00:00'))
                except:
                    pub_date = datetime.now()
        else:
            pub_date = datetime.now()
        
        if pub_date:
            fe.pubDate(pub_date)
    
    # Ensure output folder exists
    os.makedirs(OUTPUT_FOLDER, exist_ok=True)
    
    # Write RSS feed to file
    output_path = os.path.join(OUTPUT_FOLDER, filename)
    fg.rss_file(output_path, pretty=True)
    print(f"Feed created: {output_path}")

def main():
    """Main function to generate RSS feeds."""
    print("Fetching Pebble apps and generating RSS feeds...")
    
    # Fetch new apps
    print("Fetching new apps...")
    new_apps = fetch_apps("*", platform="basalt")
    
    # Fetch updated apps (you might want to adjust the query)
    print("Fetching updated apps...")
    updated_apps = fetch_apps("*", platform="basalt")
    
    # Create RSS feeds
    create_rss_feed(
        "new_apps.xml",
        "New Pebble Apps",
        "Recently released Pebble apps from the Pebble Search database",
        new_apps[:20]  # Limit to 20 most recent
    )
    
    create_rss_feed(
        "updated_apps.xml",
        "Updated Pebble Apps",
        "Recently updated Pebble apps from the Pebble Search database",
        updated_apps[:20]  # Limit to 20 most recent
    )
    
    print("Done!")

if __name__ == "__main__":
    main()