#!/usr/bin/env python3
from http.server import HTTPServer, BaseHTTPRequestHandler
import json
import secrets

class L402Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == '/api/cost-estimate':
            # Simulate L402 Challenge
            macaroon = secrets.token_hex(16)
            invoice = "lnbc1..." # Mock invoice
            
            self.send_response(402)
            self.send_header('WWW-Authenticate', f'L402 macaroon="{macaroon}", invoice="{invoice}"')
            self.send_header('Content-type', 'application/json')
            self.end_headers()
            
            response = {
                "error": "Payment Required",
                "message": "Please pay the invoice to access cost estimation."
            }
            self.wfile.write(json.dumps(response).encode())
        else:
            self.send_response(404)
            self.end_headers()

def run(server_class=HTTPServer, handler_class=L402Handler, port=8080):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    print(f"Starting L402 Skeleton Server on port {port}...")
    httpd.serve_forever()

if __name__ == "__main__":
    run()