from __future__ import annotations
import os, yaml
from pathlib import Path
from .provenance import ROOT, expand

def load(name: str) -> dict:
    with open(ROOT / "config" / f"{name}.yaml") as f:
        return yaml.safe_load(f)

def corpus_root() -> Path:
    env = os.environ.get("JOF250_CORPUS_ROOT")
    return expand(env or load("corpus")["corpus_root"])

def derived_dir() -> Path:
    d = ROOT / load("corpus")["derived_dir"]; d.mkdir(parents=True, exist_ok=True); return d

def manifests_dir() -> Path:
    d = ROOT / load("corpus")["manifests_dir"]; d.mkdir(parents=True, exist_ok=True); return d

def api_key() -> str | None:
    """Read key from env or from a key file (never printed)."""
    if os.environ.get("ANTHROPIC_API_KEY"): return os.environ["ANTHROPIC_API_KEY"]
    env_file = ROOT / ".env"
    kf = os.environ.get("JOF250_ANTHROPIC_KEY_FILE")
    if env_file.exists():
        for line in env_file.read_text().splitlines():
            if line.startswith("JOF250_ANTHROPIC_KEY_FILE="): kf = line.split("=",1)[1].strip()
            if line.startswith("ANTHROPIC_API_KEY="): return line.split("=",1)[1].strip()
    if kf and expand(kf).exists():
        for line in expand(kf).read_text().splitlines():
            if line.startswith("ANTHROPIC_API_KEY="): return line.split("=",1)[1].strip()
    return None