from http.server import BaseHTTPRequestHandler, HTTPServer
import os

DATA_FILE = os.environ.get("DATA_FILE", "/data/example.json")


class Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        try:
            with open(DATA_FILE, "rb") as f:
                body = f.read()
            self.send_response(200)
            self.send_header("Content-Type", "application/json")
            self.send_header("Content-Length", str(len(body)))
            self.end_headers()
            self.wfile.write(body)
        except FileNotFoundError:
            self.send_error(404, "Data file not found")

    def log_message(self, format, *args):
        print(f"{self.address_string()} - {format % args}", flush=True)


if __name__ == "__main__":
    port = int(os.environ.get("PORT", 8080))
    print(f"Serving {DATA_FILE} on port {port}", flush=True)
    HTTPServer(("", port), Handler).serve_forever()