"""Centralized configuration and path constants for PostGenerator."""

import os
from pathlib import Path
from dataclasses import dataclass


# ---------------------------------------------------------------------------
# Path constants (read from env, defaulting to ./data for local dev)
# ---------------------------------------------------------------------------

DATA_PATH = Path(os.getenv("DATA_PATH", "./data"))
PROMPTS_PATH = DATA_PATH / "prompts"
OUTPUTS_PATH = DATA_PATH / "outputs"
CAMPAIGNS_PATH = DATA_PATH / "campaigns"
CONFIG_PATH = DATA_PATH / "config"


# ---------------------------------------------------------------------------
# App settings
# ---------------------------------------------------------------------------

@dataclass
class Settings:
    anthropic_api_key: str
    llm_model: str
    data_path: Path
    prompts_path: Path
    outputs_path: Path
    campaigns_path: Path
    config_path: Path


def get_settings() -> Settings:
    """Load settings from environment variables."""
    api_key = os.getenv("ANTHROPIC_API_KEY", "")
    if not api_key:
        import warnings
        warnings.warn(
            "ANTHROPIC_API_KEY not set — generation endpoints will fail",
            RuntimeWarning,
            stacklevel=2,
        )

    return Settings(
        anthropic_api_key=api_key,
        llm_model=os.getenv("LLM_MODEL", "claude-sonnet-4-5"),
        data_path=DATA_PATH,
        prompts_path=PROMPTS_PATH,
        outputs_path=OUTPUTS_PATH,
        campaigns_path=CAMPAIGNS_PATH,
        config_path=CONFIG_PATH,
    )