"""加载本地开发环境变量（cursor.env 优先级最高）。"""

from __future__ import annotations

import os
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent

ENV_FILES = (
    ROOT / ".env",
    ROOT / ".env.local",
    ROOT / "backend" / ".env",
    ROOT / "backend" / ".env.local",
    ROOT / "cursor.env",
)


def read_env_file(path: Path) -> dict[str, str]:
    values: dict[str, str] = {}
    if not path.exists():
        return values
    for raw_line in path.read_text(encoding="utf-8").splitlines():
        line = raw_line.strip()
        if not line or line.startswith("#") or "=" not in line:
            continue
        key, value = line.split("=", 1)
        key = key.strip()
        value = value.strip().strip('"').strip("'")
        if key:
            values[key] = value
    return values


def load_dev_env() -> dict[str, str]:
    merged: dict[str, str] = {}
    for path in ENV_FILES:
        merged.update(read_env_file(path))
    for key, value in merged.items():
        os.environ[key] = value
    return merged


def ssh_config() -> tuple[str, str, str]:
    """返回 (host, user, password)，优先读 cursor.env。"""
    merged = load_dev_env()
    host = merged.get("NOMAD_SSH_HOST") or merged.get("DEV_SSH_HOST", "")
    user = merged.get("NOMAD_SSH_USER") or merged.get("DEV_SSH_USER", "ubuntu")
    password = merged.get("NOMAD_SSH_PASSWORD") or merged.get("DEV_SSH_PASSWORD", "")
    if not host or not password:
        raise RuntimeError(
            "SSH 配置缺失：请在项目根目录 cursor.env 中设置 DEV_SSH_HOST / DEV_SSH_PASSWORD"
        )
    return host, user, password