"""失败调用节点夹具。

健康检查成功但 /invoke 始终返回 500，支持通过 WOV_FAIL_INVALID_JSON 环境变量
切换为非法 JSON，用于验证 NodeManager 的错误响应解析分支。
"""

import http.server
import json
import os
import threading


class Handler(http.server.BaseHTTPRequestHandler):
    def do_GET(self) -> None:
        if self.path == "/health":
            self.send_response(200)
            self.end_headers()
            return
        self.send_response(404)
        self.end_headers()

    def do_POST(self) -> None:
        self.send_response(500)
        self.send_header("Content-Type", "application/json")
        if os.environ.get("WOV_FAIL_INVALID_JSON") == "1":
            body = b"not-json"
        else:
            # 默认返回协议格式的失败 JSON，验证错误信息透传。
            body = json.dumps({"status": "failed", "error": "boom"}).encode("utf-8")
        self.send_header("Content-Length", str(len(body)))
        self.end_headers()
        self.wfile.write(body)

    def log_message(self, format, *args) -> None:
        return


server = http.server.ThreadingHTTPServer(("127.0.0.1", 0), Handler)
print(f"WOV_NODE_READY port={server.server_address[1]}", flush=True)
threading.Thread(target=server.serve_forever, daemon=True).start()
threading.Event().wait()