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#!/usr/bin/env python3
"""Smoke-test a running MediaRouter production container using stdlib only."""

from __future__ import annotations

import argparse
import json
import sys
import urllib.error
import urllib.request
from collections.abc import Iterable
from typing import Any


REQUIRED_PATHS: dict[str, frozenset[str]] = {
    "/v1/projects": frozenset({"get", "post"}),
    "/v1/projects/{project_id}": frozenset({"get", "patch", "delete"}),
    "/v1/projects/{project_id}/assets": frozenset({"get", "post"}),
    "/v1/projects/{project_id}/assets/{asset_id}": frozenset({"delete"}),
    "/v1/projects/{project_id}/jobs": frozenset({"get", "post"}),
    "/v1/projects/{project_id}/jobs/{job_id}": frozenset({"delete"}),
}
REQUIRED_PREFIXES = ("/v1/social", "/v1/generation")


def request_json(
    base_url: str, path: str, *, api_key: str = ""
) -> tuple[int, dict[str, Any]]:
    headers = {"Accept": "application/json"}
    if api_key:
        headers["Authorization"] = f"Bearer {api_key}"
    request = urllib.request.Request(f"{base_url.rstrip('/')}{path}", headers=headers)
    try:
        with urllib.request.urlopen(request, timeout=15) as response:
            status = response.status
            payload = response.read()
    except urllib.error.HTTPError as exc:
        status = exc.code
        payload = exc.read()
    try:
        decoded = json.loads(payload)
    except (json.JSONDecodeError, UnicodeDecodeError) as exc:
        raise RuntimeError(f"{path} did not return JSON (HTTP {status})") from exc
    if not isinstance(decoded, dict):
        raise RuntimeError(f"{path} did not return a JSON object")
    return status, decoded


def missing_operations(paths: dict[str, Any]) -> Iterable[str]:
    for path, required_methods in REQUIRED_PATHS.items():
        operations = paths.get(path)
        if not isinstance(operations, dict):
            yield f"{path} (path missing)"
            continue
        missing = required_methods - operations.keys()
        for method in sorted(missing):
            yield f"{method.upper()} {path}"
    for prefix in REQUIRED_PREFIXES:
        if not any(path.startswith(prefix) for path in paths):
            yield f"{prefix}/* (route family missing)"


def run(base_url: str, api_key: str) -> None:
    health_status, health = request_json(base_url, "/health")
    if health_status != 200:
        raise RuntimeError(f"/health returned HTTP {health_status}")
    if health.get("success") is not True:
        raise RuntimeError("/health did not return the MediaRouter success envelope")

    openapi_status, openapi = request_json(base_url, "/openapi.json")
    if openapi_status != 200:
        raise RuntimeError(f"/openapi.json returned HTTP {openapi_status}")
    paths = openapi.get("paths")
    if not isinstance(paths, dict):
        raise RuntimeError("runtime OpenAPI contains no paths object")
    missing = list(missing_operations(paths))
    if missing:
        raise RuntimeError("runtime OpenAPI is incomplete: " + ", ".join(missing))

    auth_status, _auth = request_json(base_url, "/v1/auth/context", api_key=api_key)
    expected_auth_status = 200 if api_key else 401
    if auth_status != expected_auth_status:
        raise RuntimeError(
            "/v1/auth/context returned "
            f"HTTP {auth_status}; expected {expected_auth_status}"
        )

    final_health_status, _final_health = request_json(base_url, "/health")
    if final_health_status != 200:
        raise RuntimeError("application stopped responding during the smoke test")

    print("DEPLOYMENT_SMOKE=PASS")
    print(f"RUNTIME_OPENAPI_PATHS={len(paths)}")
    print(f"AUTHENTICATION_CHECK={'AUTHENTICATED' if api_key else 'FAIL_CLOSED'}")


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--base-url", default="http://127.0.0.1:7860")
    parser.add_argument(
        "--api-key",
        default="",
        help="Optional test key; never printed. Without it, a 401 is required.",
    )
    args = parser.parse_args()
    try:
        run(args.base_url, args.api_key)
    except Exception as exc:
        print(f"DEPLOYMENT_SMOKE=FAIL: {exc}", file=sys.stderr)
        return 1
    return 0


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