from __future__ import annotations

import os

from dataclasses import dataclass

from pathlib import Path

from dotenv import load_dotenv

from felderize.constants import DEFAULT_DOCS_BASE_URL, DEFAULT_MAX_TOKENS

@dataclass

class Config:

"""Runtime configuration for felderize, populated from environment variables."""

model: str = ""

api_key: str | None = None

base_url: str | None = None

feldera_compiler: str = ""

max_tokens: int = DEFAULT_MAX_TOKENS

docs_base_url: str = DEFAULT_DOCS_BASE_URL

auto_download_compiler: bool = True

@property

def compiler_path(self) -> str | None:

"""Return the compiler path, or None if not set."""

return self.feldera_compiler or None

@classmethod

def from_env(cls) -> Config:

# Load .env from project root (won't override existing env vars)

env_path = Path(__file__).resolve().parent.parent / ".env"

load_dotenv(env_path)

raw_max_tokens = os.environ.get("FELDERIZE_MAX_TOKENS")

raw_auto_download = (

os.environ.get("FELDERIZE_AUTO_DOWNLOAD", "1").strip().lower()

)

return cls(

model=os.environ.get("FELDERIZE_MODEL", ""),

api_key=os.environ.get("ANTHROPIC_API_KEY"),

base_url=os.environ.get("ANTHROPIC_BASE_URL"),

feldera_compiler=os.environ.get("FELDERA_COMPILER", ""),

max_tokens=int(raw_max_tokens) if raw_max_tokens else DEFAULT_MAX_TOKENS,

docs_base_url=os.environ.get(

"FELDERA_DOCS_BASE_URL", DEFAULT_DOCS_BASE_URL

),

auto_download_compiler=raw_auto_download not in ("0", "false", "no", "off"),

)