"""Factory function to create optimizer backends."""

from physics_informed_bo.config import OptimizationConfig, OptimizerBackend
from physics_informed_bo.optimizers.base_optimizer import BaseOptimizer
from physics_informed_bo.optimizers.botorch_optimizer import BoTorchOptimizer
from physics_informed_bo.optimizers.ax_optimizer import AXOptimizer
from physics_informed_bo.optimizers.bofire_optimizer import BoFireOptimizer


def create_optimizer(config: OptimizationConfig) -> BaseOptimizer:
    """Create an optimizer backend based on the configuration.

    Args:
        config: Optimization configuration specifying the backend.

    Returns:
        An initialized optimizer backend.
    """
    if config.backend == OptimizerBackend.BOTORCH:
        return BoTorchOptimizer(config)
    elif config.backend == OptimizerBackend.AX:
        return AXOptimizer(config)
    elif config.backend == OptimizerBackend.BOFIRE:
        return BoFireOptimizer(config)
    else:
        raise ValueError(f"Unsupported backend: {config.backend}")