"""
Configuration management module
Load settings from environment variables and config files
"""
import os
from pathlib import Path
from dotenv import load_dotenv

# Project root directory
PROJECT_ROOT = Path(__file__).parent.parent.absolute()

# Load environment variables
load_dotenv(PROJECT_ROOT / ".env")


class Settings:
    """Application configuration"""
    
    # OpenAI configuration
    OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
    OPENAI_BASE_URL = os.getenv("OPENAI_BASE_URL", "https://api.openai.com/v1")
    OPENAI_MODEL = os.getenv("OPENAI_MODEL", "gpt-4o-mini")
    
    # Blender configuration
    BLENDER_PATH = os.getenv(
        "BLENDER_PATH",
        "/Applications/Blender.app/Contents/MacOS/Blender"
    )
    
    # Path configuration
    INFINIGEN_ROOT = PROJECT_ROOT
    BACKEND_DIR = PROJECT_ROOT / "infinigen_examples"
    OUTPUT_DIR = PROJECT_ROOT / "outputs" / "indoors" / "coarse"
    CONFIG_OUTPUT = PROJECT_ROOT / "config" / "generated_config.yaml"
    BACKEND_CONFIG = PROJECT_ROOT / "infinigen_examples" / "constraints" / "configuration.yaml"
    
    # Generation parameters
    DEFAULT_SEED = 0
    SHARE_GRADIO = os.getenv("GRADIO_SHARE", "true").lower() == "true"
    
    @classmethod
    def validate(cls):
        """Validate required configuration"""
        errors = []
        
        if not cls.OPENAI_API_KEY:
            errors.append("OPENAI_API_KEY not set in .env")
        
        if not Path(cls.BLENDER_PATH).exists():
            errors.append(f"Blender not found at {cls.BLENDER_PATH}")
        
        if errors:
            raise ValueError(f"Configuration errors:\n" + "\n".join(f"  - {e}" for e in errors))
        
        return True


settings = Settings()