"""LLM layer: provider abstraction, concrete providers, service and fake."""

from .base import (
    FakeLLMProvider,
    LLMGenerationError,
    LLMProvider,
    LLMProviderError,
    StructuredOutputError,
)
from .cursor_provider import CursorCloudProvider
from .kimi_provider import KimiProvider
from .openrouter_provider import OpenRouterProvider
from .service import LLMService, extract_json_object


def create_llm_provider(settings):
    """Construct the provider selected in configuration."""
    provider_name = (settings.llm_provider or "cursor").strip().lower()
    if provider_name == "cursor":
        return CursorCloudProvider(settings)
    if provider_name == "kimi":
        return KimiProvider(settings)
    if provider_name in ("openrouter", "groq", "gemini", "openai"):
        return OpenRouterProvider(settings)
    raise RuntimeError(f"Unsupported LLM provider: {provider_name!r}")


__all__ = [
    "CursorCloudProvider",
    "FakeLLMProvider",
    "KimiProvider",
    "LLMGenerationError",
    "LLMProvider",
    "LLMProviderError",
    "LLMService",
    "OpenRouterProvider",
    "StructuredOutputError",
    "create_llm_provider",
    "extract_json_object",
]