from flask import Flask, render_template, Response,  request
from flask_flatpages import FlatPages
from werkzeug.middleware.proxy_fix import ProxyFix
import requests

app = Flask(__name__)
app.wsgi_app = ProxyFix(app.wsgi_app, x_proto=1, x_host=1)

app.config.update(
    FLATPAGES_AUTO_RELOAD = True,
    FLATPAGES_EXTENSION = '.md',
    FLATPAGES_MARKDOWN_EXTENSIONS = ['fenced_code', 'tables']
)

pages = FlatPages(app)

@app.route('/')
def index():
    # Sort posts by date metadata
    posts = sorted(pages, key=lambda p: p.meta.get('date'), reverse=True)
    return render_template('index.html', posts=posts)

@app.route('/about')
def about():
    return render_template('about.html')
@app.route('/proxy-chat', methods=['POST'])
def proxy_chat():
    target_url = "http://192.168.0.37:5002/v1/chat/completions"
    
    # Ensure 'stream' is set to True for the backend
    payload = request.json
    payload['stream'] = True 
    
    try:
        # We use stream=True so requests doesn't buffer the whole response
        response = requests.post(
            target_url, 
            json=payload, 
            timeout=300, 
            stream=True 
        )
        
        def generate():
            # This yields chunks of data to the browser as they arrive
            for chunk in response.iter_content(chunk_size=None):
                if chunk:
                    yield chunk

        return Response(
            generate(), 
            content_type='text/event-stream' # Standard for streaming AI responses
        )
        
    except requests.exceptions.Timeout:
        return {"error": "Backend timed out"}, 504
    except Exception as e:
        return {"error": str(e)}, 500
@app.route('/post/<path:path>/') 
def post(path):
    page = pages.get_or_404(path)
    return render_template('post.html', page=page)

@app.route('/tag/<string:tag_name>/')
def tag(tag_name):
    tagged_pages = [p for p in pages if tag_name in p.meta.get('tags', [])]
    return render_template('tag.html', pages=tagged_pages, tag_name=tag_name)

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=5001, debug=True)