#
# SPDX-FileCopyrightText: Copyright (c) provide.io llc. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#

"""Caching layer for search results and queries."""

from typing import Any

from attrs import define  # If using attrs for cache entry structure
from provide.foundation import logger

from tofusoup.config.defaults import CACHE_MAX_SIZE, CACHE_TTL_SECONDS

# from .engine import SearchQuery, SearchResult # Types for cached items


@define
class CacheEntry:
    """Represents a cached search result list or other search-related data."""

    query_key: str  # A unique key generated from a SearchQuery
    results: list[Any]  # list[SearchResult] ideally
    timestamp: float  # Unix timestamp of when the entry was created
    # Add TTL, metadata, etc.


class SearchCache:
    """Handles caching of search queries and results."""

    def __init__(self, max_size: int = CACHE_MAX_SIZE, ttl_seconds: int = CACHE_TTL_SECONDS) -> None:
        self.max_size = max_size
        self.ttl_seconds = ttl_seconds
        self._cache: dict[str, CacheEntry] = {}  # In-memory cache for now

    async def get(self, query: Any) -> list[Any] | None:  # query: SearchQuery
        """Retrieve cached results for a given query."""
        query_key = self._generate_key(query)
        entry = self._cache.get(query_key)
        if entry:
            # Check TTL
            # import time
            # if time.time() - entry.timestamp < self.ttl_seconds:
            # return entry.results
            # else:
            # self.delete(query_key) # Expired
            return entry.results  # Simplified for stub
        return None

    async def put(
        self, query: Any, results: list[Any]
    ) -> None:  # query: SearchQuery, results: list[SearchResult]
        """Cache the results for a given query."""
        query_key = self._generate_key(query)
        # import time
        # entry = CacheEntry(query_key=query_key, results=results, timestamp=time.time())
        # self._cache[query_key] = entry
        # Enforce max_size if necessary (e.g., LRU eviction)
        logger.debug("cache_store", query_key=query_key)

    async def delete(self, query_key: str) -> None:
        """Delete a specific entry from the cache."""
        if query_key in self._cache:
            del self._cache[query_key]

    async def clear(self) -> None:
        """Clear the entire search cache."""
        self._cache.clear()

    def _generate_key(self, query: Any) -> str:  # query: SearchQuery
        """Generate a unique string key from a SearchQuery object."""
        # Placeholder implementation
        # return f"{query.term}_{sorted(query.filters.items())}"
        return str(query)


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