# -*- coding: utf-8 -*-
"""
Data directory, profile path, CLI path debugging output.
"""
import os
import re
import sys
from typing import Optional

from jiangchang_skill_core.runtime_env import get_data_root, get_user_id
from util.constants import SKILL_SLUG


def get_skill_data_dir() -> str:
    path = os.path.join(get_data_root(), get_user_id(), SKILL_SLUG)
    os.makedirs(path, exist_ok=True)
    return path


def get_db_path() -> str:
    return os.path.join(get_skill_data_dir(), "account-manager.db")


def _runtime_paths_debug_text() -> str:
    """For debugging: print current data path info to stderr."""
    env_root = (os.getenv("JIANGCHANG_DATA_ROOT") or "").strip() or "(未设置)"
    env_uid = (os.getenv("JIANGCHANG_USER_ID") or "").strip() or "(未设置→使用 _anon)"
    return (
        "[account-manager] "
        f"JIANGCHANG_DATA_ROOT={env_root} | "
        f"JIANGCHANG_USER_ID={env_uid} | "
        f"实际数据根={get_data_root()} | "
        f"实际用户目录={get_user_id()} | "
        f"数据库文件={get_db_path()}"
    )


def _maybe_print_paths_debug_cli() -> None:
    """Set JIANGCHANG_ACCOUNT_DEBUG_PATHS=1 to print paths in stderr."""
    v = (os.getenv("JIANGCHANG_ACCOUNT_DEBUG_PATHS") or "").strip().lower()
    if v in ("1", "true", "yes", "on"):
        print(_runtime_paths_debug_text(), file=sys.stderr)


_WIN_FS_FORBIDDEN = re.compile(r'[<>:"/\\|?*\x00-\x1f]')
_WIN_RESERVED_NAMES = frozenset(
    ["CON", "PRN", "AUX", "NUL"]
    + [f"COM{i}" for i in range(1, 10)]
    + [f"LPT{i}" for i in range(1, 10)]
)


def _fs_safe_segment(name: str, fallback: str) -> str:
    """Single directory segment: strip Windows-unsafe chars; empty -> fallback."""
    t = _WIN_FS_FORBIDDEN.sub("_", (name or "").strip())
    t = t.rstrip(" .")
    if not t:
        t = fallback
    if t.upper() in _WIN_RESERVED_NAMES:
        t = f"_{t}"
    return t


def get_default_profile_dir_for_web(
    platform_key: str,
    label: str,
    login_id: Optional[str] = None,
    domain: str = "generic",
) -> str:
    """
    Generate a browser profile directory path.

    Structure:
      {DATA_ROOT}/{USER_ID}/account-manager/profiles/{domain}/{platform_key}/{safe_label}[_{login_id_suffix]/

    This keeps profiles organized by domain and platform for easy
    identification in file explorer.
    """
    label_seg = _fs_safe_segment(label, platform_key)
    login_suffix = ""
    if login_id:
        safe_login = _fs_safe_segment(login_id, "")
        if safe_login:
            login_suffix = f"_{safe_login[:16]}"
    path = os.path.join(
        get_skill_data_dir(),
        "profiles",
        _fs_safe_segment(domain, "generic"),
        _fs_safe_segment(platform_key, "unknown"),
        f"{label_seg}{login_suffix}",
    )
    os.makedirs(path, exist_ok=True)
    return path