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"""WebsiteBench Harbor foreground entrypoint for the Amazon clone."""

from __future__ import annotations

import json
import os
import re
import urllib.error
import urllib.parse
import urllib.request
from pathlib import Path


ROOT = Path(__file__).resolve().parent
SITE_ROOT = ROOT.parent
DATA_DIR = Path(os.environ["DATA_DIR"])
if not DATA_DIR.is_absolute():
    raise RuntimeError("DATA_DIR must be absolute")
DATA_DIR = DATA_DIR.resolve()
DATA_DIR.mkdir(parents=True, exist_ok=True)
os.environ["AMAZON_HOST"] = os.environ["HOST"]
os.environ["AMAZON_DB_PATH"] = str(DATA_DIR / "amazon.sqlite3")
os.environ["WEBSITEBENCH_DATA_DIR"] = str(DATA_DIR)
os.environ["WEBSITEBENCH_SITE_BACKEND_DATABASE"] = str(DATA_DIR / "amazon.sqlite3")
os.environ["WEBSITEBENCH_SITE_BACKEND_RUNTIME"] = str(SITE_ROOT / "backend" / "runtime.json")
if os.environ.get("WEBSITEBENCH_MAILBOX_BOOTSTRAP_URL", "").strip():
    os.environ["WEBSITEBENCH_DEPLOYMENT_PROFILE"] = "offline-harbor"
os.environ["WEBSITEBENCH_PAYMENT_PROFILE"] = "local-sandbox"
os.environ["AMAZON_PAYMENT_MODE"] = "local-sandbox"


class _NoRedirect(urllib.request.HTTPRedirectHandler):
    def redirect_request(self, request, fp, code, msg, headers, newurl):
        del request, fp, code, msg, headers, newurl
        return None


def _configure_harbor_mailbox() -> None:
    bootstrap_url = os.environ.get("WEBSITEBENCH_MAILBOX_BOOTSTRAP_URL", "").strip()
    bootstrap_token = os.environ.get(
        "WEBSITEBENCH_MAILBOX_BOOTSTRAP_TOKEN", ""
    ).strip()
    if not bootstrap_url and not bootstrap_token:
        return
    parsed = urllib.parse.urlsplit(bootstrap_url)
    if (
        parsed.scheme != "http"
        or parsed.hostname not in {
            "127.0.0.1",
            "::1",
            "localhost",
            "mailbox-internal",
        }
        or parsed.username is not None
        or parsed.password is not None
        or len(bootstrap_token) < 32
    ):
        raise RuntimeError("Harbor mailbox bootstrap configuration is invalid")
    request = urllib.request.Request(
        bootstrap_url,
        headers={
            "Accept": "application/json",
            "Authorization": f"Bearer {bootstrap_token}",
        },
        method="GET",
    )
    try:
        with urllib.request.build_opener(_NoRedirect).open(request, timeout=10) as response:
            raw = response.read(64 * 1024 + 1)
    except (OSError, urllib.error.URLError) as exc:
        raise RuntimeError("Harbor mailbox bootstrap is unavailable") from exc
    if len(raw) > 64 * 1024:
        raise RuntimeError("Harbor mailbox bootstrap response is too large")
    try:
        identity = json.loads(raw.decode("utf-8"))
        namespace = str(identity["namespace"])
        capability = str(identity["capability"])
        smtp_host = str(identity["smtp_host"])
        smtp_port = int(identity["smtp_port"])
    except (KeyError, TypeError, ValueError, UnicodeError, json.JSONDecodeError) as exc:
        raise RuntimeError("Harbor mailbox bootstrap response is invalid") from exc
    if (
        re.fullmatch(r"[A-Za-z0-9][A-Za-z0-9._-]*", namespace) is None
        or len(namespace) > 128
        or len(capability) < 32
        or smtp_host not in {"127.0.0.1", "::1", "localhost", "mailbox-internal"}
        or not 1 <= smtp_port <= 65535
    ):
        raise RuntimeError("Harbor mailbox identity is invalid")
    os.environ.update(
        {
            "AMAZON_CLONE_REQUIRE_SMTP": "1",
            "AMAZON_CLONE_SMTP_HOST": smtp_host,
            "AMAZON_CLONE_SMTP_PORT": str(smtp_port),
            "AMAZON_CLONE_SMTP_TLS": "none",
            # The trial mailbox account only accepts envelopes from the
            # sender the harness offers; a site-branded literal is rejected
            # with "mail sender is not allowed" and no code ever lands.
            "AMAZON_CLONE_SMTP_FROM": (
                os.environ.get("WEBSITEBENCH_SMTP_FROM", "").strip()
                or os.environ.get("WEBSITEBENCH_MAIL_FROM", "").strip()
                or "Amazon WebsiteBench <no-reply@amazon.websitebench.local>"
            ),
            "AMAZON_CLONE_MAILBOX_NAMESPACE": namespace,
            "AMAZON_CLONE_MAILBOX_CAPABILITY": capability,
        }
    )


_configure_harbor_mailbox()

import server  # noqa: E402


_original_get = server.PublicHandler.do_GET
_original_head = server.PublicHandler.do_HEAD


# /healthz is the contract (ADR-0010); the private path stays mounted so
# bundles frozen before the migration keep answering.
HEALTH_PATHS = ("/healthz", "/__websitebench/health")


def _health(handler, *, head: bool) -> bool:
    if urllib.parse.urlsplit(handler.path).path not in HEALTH_PATHS:
        return False
    body = b'{"status":"ok"}'
    handler.send_response(200)
    handler.send_header("Content-Type", "application/json")
    handler.send_header("Content-Length", str(len(body)))
    handler.send_header("Cache-Control", "no-store")
    handler.end_headers()
    if not head:
        handler.wfile.write(body)
    return True


def do_get(handler):
    if not _health(handler, head=False):
        _original_get(handler)


def do_head(handler):
    if not _health(handler, head=True):
        _original_head(handler)


class _DisabledAdminServer:
    def serve_forever(self):
        return None

    def shutdown(self):
        return None

    def server_close(self):
        return None


_real_server = server.ReusableThreadingHTTPServer


def _server_factory(address, handler):
    if handler is server.AdminHandler:
        return _DisabledAdminServer()
    return _real_server(address, handler)


server.PublicHandler.do_GET = do_get
server.PublicHandler.do_HEAD = do_head
server.ReusableThreadingHTTPServer = _server_factory


if __name__ == "__main__":
    raise SystemExit(server.main())