"""Unified Search plugin contract — public interface for cross-plugin access."""

from __future__ import annotations

from app.plugins.builtins.contracts import get_contract_registry
from app.plugins.builtins.unified_search.embedding import generate_embedding
from app.plugins.builtins.unified_search.search_engine import hybrid_search, find_similar_all_types
from app.plugins.builtins.unified_search.provider_registry import get_search_registry
from app.plugins.builtins.unified_search.base_provider import BaseSearchProvider


class UnifiedSearchContract:
    """Public contract for the unified_search plugin."""

    contract_name = "unified_search"

    generate_embedding = staticmethod(generate_embedding)
    hybrid_search = staticmethod(hybrid_search)
    find_similar_all_types = staticmethod(find_similar_all_types)
    get_search_registry = staticmethod(get_search_registry)
    BaseSearchProvider = BaseSearchProvider


# ─── self-registration ───

_contract = UnifiedSearchContract()
get_contract_registry().register("unified_search", _contract)

# Backward-compatible local accessor
_contract_instance: UnifiedSearchContract | None = None


def get_contract() -> UnifiedSearchContract:
    global _contract_instance
    if _contract_instance is None:
        _contract_instance = UnifiedSearchContract()
    return _contract_instance


__all__ = ["UnifiedSearchContract", "generate_embedding", "hybrid_search", "find_similar_all_types", "get_search_registry", "BaseSearchProvider"]