"""Configuration management for basic-memory."""
from pathlib import Path

from pydantic_settings import BaseSettings, SettingsConfigDict
from pydantic import Field, field_validator

DATABASE_NAME = "memory.db"

class ProjectConfig(BaseSettings):
    """Configuration for a specific basic-memory project."""
    name: str = Field(default="default")
    path: Path = Field(
        default_factory=lambda: Path.home() / ".basic-memory" / "projects" / "default",
        description="Path to project files"
    )
    
    model_config = SettingsConfigDict(
        env_prefix='BASIC_MEMORY_',  # env vars like BASIC_MEMORY_DB_URL
        extra='ignore',
        env_file=".env",
        env_file_encoding="utf-8"
    )

    @property
    def database_url(self) -> str:
        """Get SQLite database URL based on project path."""
        db_path = self.path / "data" / DATABASE_NAME
        db_path.parent.mkdir(parents=True, exist_ok=True)
        return f"sqlite+aiosqlite:///{db_path}"
    
    @field_validator('path')
    @classmethod
    def ensure_path_exists(cls, v: Path) -> Path:
        """Ensure project path exists."""
        if not v.exists():
            v.mkdir(parents=True)
        return v

# Load project config
config = ProjectConfig()