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"
    
    try:
        # We use stream=True so we don't load the whole response into RAM at once
        response = requests.post(
            target_url, 
            json=request.json, 
            timeout=300,
            stream=True 
        )
        
        # Generator to yield chunks of data as they arrive
        def generate():
            for chunk in response.iter_content(chunk_size=1024):
                yield chunk

        return Response(
            generate(), 
            status=response.status_code, 
            content_type=response.headers.get('content-type', 'application/json')
        )
        
    except requests.exceptions.Timeout:
        return {"error": "The backend LLM timed out."}, 504
    except Exception as e:
        app.logger.error(f"Proxy error: {str(e)}")
        return {"error": "Internal server error"}, 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)