import os
from dataclasses import dataclass
from pathlib import Path


@dataclass
class Settings:
    # Paths
    openclaw_agents_root: Path
    openclaw_state_dir: Path
    db_path: Path

    # Agent allowlist (comma-separated; empty = watch all)
    agents_allowlist: list[str]

    # Glob exclusion patterns for session files (comma-separated; e.g. "*.trajectory.jsonl,*.lock")
    session_glob_exclude: list[str]

    # Spooler
    max_toolresult_chars: int
    spooler_batch_size: int
    spooler_redact_patterns: str
    tool_noise_patterns: str

    # Reviewer
    review_confidence_threshold: float

    # API
    api_port: int


def _env_path(name: str, default: str) -> Path:
    return Path(os.environ.get(name, default)).expanduser()


def load_settings() -> Settings:
    state_dir = _env_path("OPENCLAW_STATE_DIR", "~/.openclaw/workspace/ops/state")
    state_dir.mkdir(parents=True, exist_ok=True)
    raw_allowlist = os.environ.get("AGENTS_ALLOWLIST", "")
    parsed_allowlist = [a.strip() for a in raw_allowlist.split(",") if a.strip()] if raw_allowlist else []
    raw_exclude = os.environ.get("SESSION_GLOB_EXCLUDE", "")
    parsed_exclude = [e.strip() for e in raw_exclude.split(",") if e.strip()] if raw_exclude else []
    return Settings(
        agents_allowlist=parsed_allowlist,
        session_glob_exclude=parsed_exclude,
        openclaw_agents_root=_env_path("OPENCLAW_AGENTS_ROOT", "~/.openclaw/agents"),
        openclaw_state_dir=state_dir,
        db_path=_env_path("SESSION_AMPLIFIER_DB_PATH", str(state_dir / "session_amplifier.sqlite")),
        max_toolresult_chars=int(os.environ.get("MAX_TOOLRESULT_CHARS", "2000")),
        spooler_batch_size=int(os.environ.get("SPOOLER_BATCH_SIZE", "100")),
        spooler_redact_patterns=os.environ.get("SPOOLER_REDACT_PATTERNS", "api_key,path,base64"),
        tool_noise_patterns=os.environ.get("TOOL_NOISE_PATTERNS", "ENOENT,no output,command exited"),
        review_confidence_threshold=float(os.environ.get("REVIEW_CONFIDENCE_THRESHOLD", "0.5")),
        api_port=int(os.environ.get("API_PORT", "8477")),
    )


settings = load_settings()