"""给所有 Python 示例共用的最小启动代码。

目标：
1. 让示例不依赖 pytest，直接 ``python xx.py`` 就能跑；
2. 从下列位置之一加载环境变量（排序即优先级）：
   - 进程环境变量 VJMAP_API / VJMAP_TOKEN / ...
   - ``vjmap-service/tests/.env``（可选）
   - 上级目录 ``test/.env``（可选；使用 ``k:v`` 或 ``k=v`` 均可）
3. 导出 :func:`make_client` 一键拿 :class:`vjmap.Vjmap` 实例。
"""

from __future__ import annotations

import os
import sys
from pathlib import Path
from typing import Dict

HERE = Path(__file__).resolve().parent
NB_ROOT = HERE.parent.parent
SDK_DIR = NB_ROOT / "sdk" / "python"

if str(SDK_DIR) not in sys.path:
    sys.path.insert(0, str(SDK_DIR))

import vjmap


def _parse_env_file(path: Path) -> Dict[str, str]:
    out: Dict[str, str] = {}
    if not path.is_file():
        return out
    for line in path.read_text("utf-8").splitlines():
        line = line.strip()
        if not line or line.startswith("#"):
            continue
        sep_eq = line.find("=")
        sep_co = line.find(":")
        if sep_eq != -1 and (sep_co == -1 or sep_eq < sep_co):
            k, v = line[:sep_eq], line[sep_eq + 1:]
        elif sep_co != -1:
            k, v = line[:sep_co], line[sep_co + 1:]
        else:
            continue
        out[k.strip()] = v.strip().strip('"').strip("'")
    return out


def _merge_env() -> Dict[str, str]:
    merged: Dict[str, str] = dict(os.environ)
    nb_env = NB_ROOT / "tests" / ".env"
    for k, v in _parse_env_file(nb_env).items():
        merged.setdefault(k, v)
    root_env = NB_ROOT.parent / "test" / ".env"
    alias = {"api": "VJMAP_API", "token": "VJMAP_TOKEN", "map_super_key": "VJMAP_MAP_SUPER_KEY"}
    for k, v in _parse_env_file(root_env).items():
        key = alias.get(k, k)
        merged.setdefault(key, v)
    return merged


_ENV = _merge_env()


def env(key: str, default: str = "") -> str:
    return _ENV.get(key, default)


def make_client() -> vjmap.Vjmap:
    base = env("VJMAP_API", "http://127.0.0.1:27660/api/v1").rstrip("/")
    token = env("VJMAP_TOKEN", "")
    if not token:
        raise SystemExit("VJMAP_TOKEN 未配置：请设置环境变量（或写入 vjmap-service/tests/.env）")
    return vjmap.Vjmap(base, token)


def sample_mapid() -> str:
    return env("VJMAP_SAMPLE_MAPID", "sys_zp")


def sample_version() -> str:
    return env("VJMAP_SAMPLE_VERSION", "v1")


def sample_dwg() -> Path:
    d = env("VJMAP_TEST_DWG_DIR") or "test"
    n = env("VJMAP_TEST_DWG_NAME") or "caf27de8a225.dwg"
    repo_root = NB_ROOT.parent
    candidates = [
        (repo_root / d / n),
        (NB_ROOT / d / n),
        (Path(d) / n) if Path(d).is_absolute() else None,
    ]
    for c in candidates:
        if c is not None and c.is_file():
            return c
    raise SystemExit(
        f"示例 DWG 不存在，已尝试：{[str(c) for c in candidates if c]}\n"
        f"请用环境变量（或 vjmap-service/tests/.env）设置 VJMAP_TEST_DWG_DIR / VJMAP_TEST_DWG_NAME"
    )