"""Configuration loading."""

from __future__ import annotations

import os
from pathlib import Path
from typing import Any

import yaml


def _read_yaml(path: Path) -> dict[str, Any]:
    if not path.exists():
        return {}
    with path.open("r", encoding="utf-8") as handle:
        return yaml.safe_load(handle) or {}


def load_config(config_name: str = "base.yaml") -> dict[str, Any]:
    root = Path(__file__).resolve().parents[2]
    config_path = root / "configs" / config_name
    return _read_yaml(config_path)


def load_project_env(path: Path | None = None) -> None:
    """Load simple KEY=VALUE pairs from .env without overriding shell env."""

    root = Path(__file__).resolve().parents[2]
    env_path = path or root / ".env"
    if not env_path.exists():
        return
    for raw_line in env_path.read_text(encoding="utf-8").splitlines():
        line = raw_line.strip()
        if not line or line.startswith("#") or "=" not in line:
            continue
        key, value = line.split("=", 1)
        key = key.strip()
        if not key or key in os.environ:
            continue
        os.environ[key] = value.strip().strip('"').strip("'")


def env_bool(name: str, default: bool = False) -> bool:
    raw = os.getenv(name)
    if raw is None:
        return default
    return raw.strip().lower() in {"1", "true", "yes", "on"}


def env_int(name: str, default: int) -> int:
    raw = os.getenv(name)
    if raw is None:
        return default
    try:
        return int(raw)
    except ValueError:
        return default