"""Cloud Hypervisor REST API 传输（叶子模块，不依赖
cloud.sandbox，避免循环导入）。

只用标准库 raw HTTP over Unix socket，无第三方依赖。
"""

import json
import os
import socket


def _unix_socket_api(socket_path, method, path, payload=None):
    """Cloud Hypervisor REST API 的默认传输：标准库 raw HTTP
    over Unix socket（无第三方依赖）。返回 (status, body)，
    body 能解析 JSON 时为 dict，否则为原文本。socket 不存在
    或连接失败时 raise RuntimeError（调用方据此判 api 超时
    /失败，不编造 200）。"""
    if not os.path.exists(socket_path):
        raise RuntimeError("api socket 不存在：%s" % socket_path)
    body = b""
    if payload is not None:
        body = json.dumps(payload).encode("utf-8")
    req_lines = ["%s /api/v1%s HTTP/1.1" % (method, path),
                 "Host: localhost",
                 "Accept: application/json",
                 "Content-Type: application/json",
                 "Content-Length: %d" % len(body),
                 "Connection: close", "", ""]
    raw = "\r\n".join(req_lines).encode("utf-8") + body
    sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
    sock.settimeout(5)
    try:
        sock.connect(socket_path)
        sock.sendall(raw)
        chunks = []
        while True:
            try:
                data = sock.recv(65536)
            except socket.timeout:
                break
            if not data:
                break
            chunks.append(data)
    finally:
        sock.close()
    text = b"".join(chunks).decode("utf-8", errors="replace")
    status = 0
    if text.startswith("HTTP/"):
        try:
            status = int(text.split()[1])
        except (IndexError, ValueError):
            status = 0
    body_text = text.split("\r\n\r\n", 1)[1] if "\r\n\r\n" in text \
        else ""
    try:
        parsed = json.loads(body_text) if body_text.strip() else {}
    except ValueError:
        parsed = body_text
    return status, parsed


def normalize_api_result(result):
    """API 调用归一化：fake api_client 可返回 (status, body)
    或 {"status":..., "body":...} 或带 .status 的对象，本
    函数统一成 (status:int, body)。"""
    if isinstance(result, tuple) and len(result) == 2:
        return int(result[0]), result[1]
    if isinstance(result, dict):
        status = result.get("status", result.get("status_code"))
        body = result.get("body", result)
        return (int(status) if status is not None else 0), body
    status = getattr(result, "status", None) \
        or getattr(result, "status_code", None)
    return (int(status) if status is not None else 0), result