"""controller / worktree / external-workspace 경로 해석 + 결정론적 run-id.
worktree(=arm 코드, clean)와 workspace(=산출물)를 물리 분리한다."""
import hashlib
import os

ROOT = os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd())
_EXEC_BASE = "/tmp/cascade-benchmark"


def controller_dir():
    return os.path.join(ROOT, "benchmark", "cascade")


def run_id(seed):
    return "run-" + hashlib.sha256(str(seed).encode()).hexdigest()[:12]


def run_dir(rid):
    return os.path.join(controller_dir(), "runs", rid)


def arm_run_dir(rid, arm):
    return os.path.join(run_dir(rid), arm)


def candidates_dir(rid):
    return os.path.join(controller_dir(), "candidates", rid)


def judgments_path():
    return os.path.join(controller_dir(), "judgments.jsonl")


def exec_root(rid):
    return os.path.join(_EXEC_BASE, rid)


def worktree_dir(rid, arm):
    return os.path.join(exec_root(rid), "worktrees", arm)


def workspace_dir(rid, arm):
    return os.path.join(exec_root(rid), "workspaces", arm)