"""MongoDB repository implementations.

This module provides MongoDB-specific repository implementations for the Cadence framework.
Currently, a placeholder for future MongoDB support.

Planned Features:
    - Native MongoDB async driver support (motor)
    - Document-based storage optimized for conversation data
    - MongoDB aggregation pipelines for analytics
    - Full-text search using MongoDB Atlas Search
    - Horizontal scaling and sharding support
    - JSON-native storage for flexible metadata
"""

from datetime import datetime
from typing import Any, Dict, List, Optional

from cadence.domain.models.conversation import Conversation
from cadence.domain.models.thread import Thread, ThreadStatus
from cadence.infrastructure.database.repositories.conversation_repository import ConversationRepository
from cadence.infrastructure.database.repositories.thread_repository import ThreadRepository


class MongoThreadRepository(ThreadRepository):
    """MongoDB implementation of ThreadRepository.

    TODO: Implement MongoDB-specific optimizations:
    - Use motor for async MongoDB operations
    - Implement MongoDB aggregation pipelines
    - Optimize for document-based storage
    - Implement MongoDB-specific indexing strategies
    """

    def __init__(self, db_client):
        """Initialize with MongoDB client."""
        self.db_client = db_client
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def create_thread(self, user_id: str, org_id: str) -> Thread:
        """Create a new thread."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def get_thread(self, thread_id: str) -> Optional[Thread]:
        """Get thread by ID."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def update_thread(self, thread: Thread) -> Thread:
        """Update an existing thread."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def archive_thread(self, thread_id: str) -> bool:
        """Archive a thread."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def list_threads(
        self,
        user_id: Optional[str] = None,
        org_id: Optional[str] = None,
        status: Optional[ThreadStatus] = None,
        limit: int = 20,
        offset: int = 0,
        sort_by: str = "updated_at",
        sort_order: str = "desc",
    ) -> List[Thread]:
        """List threads with filtering and pagination."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def count_threads(
        self, user_id: Optional[str] = None, org_id: Optional[str] = None, status: Optional[ThreadStatus] = None
    ) -> int:
        """Count threads matching filters."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def get_thread_stats(self, thread_id: str) -> Optional[Dict[str, Any]]:
        """Get comprehensive stats for a thread using MongoDB aggregation."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def update_thread_tokens(self, thread_id: str, user_tokens: int, assistant_tokens: int) -> bool:
        """Update thread token counters atomically."""
        raise NotImplementedError("MongoDB repositories not yet implemented")


class MongoConversationRepository(ConversationRepository):
    """MongoDB implementation of ConversationRepository.

    TODO: Implement MongoDB-specific optimizations:
    - Use MongoDB's document storage for flexible metadata
    - Implement MongoDB aggregation for analytics
    - Use MongoDB Atlas Search for full-text search
    - Optimize for horizontal scaling
    """

    def __init__(self, db_client, thread_repository: ThreadRepository):
        """Initialize with MongoDB client and thread repository."""
        self.db_client = db_client
        self.thread_repository = thread_repository
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def save(self, conversation: Conversation) -> Conversation:
        """Save a conversation atomically with thread token updates."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def get(self, id: str) -> Optional[Conversation]:
        """Get a conversation by ID."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def get_conversation_history(
        self, thread_id: str, limit: int = 50, before_id: Optional[str] = None
    ) -> List[Conversation]:
        """Get conversation history for a thread, ordered by creation time."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def get_thread_conversations_count(self, thread_id: str) -> int:
        """Get total number of conversations in a thread."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def get_recent_conversations(
        self, user_id: Optional[str] = None, org_id: Optional[str] = None, limit: int = 10, hours_back: int = 24
    ) -> List[Conversation]:
        """Get recent conversations across threads."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def search_conversations(
        self, query: str, thread_id: Optional[str] = None, user_id: Optional[str] = None, limit: int = 20
    ) -> List[Conversation]:
        """Search conversations by content using MongoDB Atlas Search."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def get_conversation_statistics(
        self,
        thread_id: Optional[str] = None,
        user_id: Optional[str] = None,
        org_id: Optional[str] = None,
        start_date: Optional[datetime] = None,
        end_date: Optional[datetime] = None,
    ) -> Dict[str, Any]:
        """Get conversation statistics using MongoDB aggregation pipelines."""
        raise NotImplementedError("MongoDB repositories not yet implemented")

    async def delete_old_conversations(self, older_than_days: int) -> int:
        """Delete conversations older than specified days."""
        raise NotImplementedError("MongoDB repositories not yet implemented")
