from .Template import GameplayBackendTemplate

class GameplayBackendBuilder:
  @staticmethod
  def build(backend:str="sqlite", db_path:str|None=None, busy_timeout_ms:int=5000, pg_dsn:str|None=None, pg_min_size:int=1, pg_max_size:int=5) -> GameplayBackendTemplate:
    normalized = (backend or "sqlite").strip().lower()

    if normalized == "postgresql" or normalized == "postgres":
      from .PostgresqlGameplayBackend import PostgresqlGameplayBackend
      if not pg_dsn:
        raise ValueError("pg_dsn is required for the postgresql backend")
      return PostgresqlGameplayBackend(
        dsn=pg_dsn,
        min_size=pg_min_size,
        max_size=pg_max_size,
        sqlite_migration_path=db_path,
      )

    if normalized == "sqlite":
      from .SqliteGameplayBackend import SqliteGameplayBackend
      if not db_path:
        raise ValueError("db_path is required for the sqlite backend")
      return SqliteGameplayBackend(db_path=db_path, busy_timeout_ms=busy_timeout_ms)

    raise ValueError(f"Unknown gameplay backend: {backend!r}. Choose 'sqlite' or 'postgresql'.")