"""解析 Godot 的 user:// 根目录——与 game/override.cfg 的隔离口径同一份。

无 override.cfg（主工作区）→ %APPDATA%/Godot/app_userdata/<project.godot 的 config/name>；
有 override.cfg（代码面 worktree，由 tools/setup_worktree_userdir.sh 生成）→ %APPDATA%/<custom_user_dir_name>。
"""
import os
import re
from pathlib import Path


def _project_name(repo_root: Path) -> str:
    text = (Path(repo_root) / "game" / "project.godot").read_text(encoding="utf-8", errors="replace")
    m = re.search(r'^config/name="([^"]*)"', text, re.M)
    return m.group(1) if m else "DungeonSweeperVerticalSlice"


def resolve_user_dir(repo_root: Path) -> Path:
    base = Path(os.environ.get("APPDATA") or (Path.home() / "AppData" / "Roaming"))
    override = Path(repo_root) / "game" / "override.cfg"
    if override.is_file():
        text = override.read_text(encoding="utf-8", errors="replace")
        custom = re.search(r'^config/use_custom_user_dir=true\s*$', text, re.M)
        name = re.search(r'^config/custom_user_dir_name="([^"]*)"', text, re.M)
        if custom and name and name.group(1):
            return base / name.group(1)
    return base / "Godot" / "app_userdata" / _project_name(Path(repo_root))