import json
import os
import gzip
from datetime import datetime, timezone
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer


LOG_FILE = os.environ.get("OPA_REQUEST_LOG_FILE", "/logs/opa.log")
PORT = int(os.environ.get("OPA_REQUEST_LOG_PORT", "8282"))


class DecisionLogHandler(BaseHTTPRequestHandler):
    def do_POST(self):
        content_length = int(self.headers.get("Content-Length", "0"))
        raw_payload = self.rfile.read(content_length) if content_length else b""
        content_encoding = self.headers.get("Content-Encoding", "").lower()

        if content_encoding == "gzip" and raw_payload:
            raw_payload = gzip.decompress(raw_payload)

        payload = raw_payload.decode("utf-8") if raw_payload else ""

        entry = {
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "path": self.path,
            "headers": dict(self.headers.items()),
            "body": json.loads(payload) if payload else None,
        }

        os.makedirs(os.path.dirname(LOG_FILE), exist_ok=True)
        with open(LOG_FILE, "a", encoding="utf-8") as log_file:
            log_file.write(json.dumps(entry, ensure_ascii=True) + "\n")

        self.send_response(200)
        self.end_headers()
        self.wfile.write(b"ok")

    def log_message(self, format, *args):
        return


if __name__ == "__main__":
    server = ThreadingHTTPServer(("0.0.0.0", PORT), DecisionLogHandler)
    server.serve_forever()