import uuid
from datetime import datetime, timezone
from typing import Dict, List, Optional

from openai import AsyncOpenAI
from sqlalchemy import func, select
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy.orm import noload

from letta.constants import MAX_EMBEDDING_DIM
from letta.errors import EmbeddingConfigRequiredError
from letta.helpers.decorators import async_redis_cache
from letta.llm_api.llm_client import LLMClient
from letta.log import get_logger
from letta.orm import ArchivesAgents
from letta.orm.errors import NoResultFound
from letta.orm.passage import ArchivalPassage, SourcePassage
from letta.orm.passage_tag import PassageTag
from letta.otel.tracing import trace_method
from letta.schemas.agent import AgentState
from letta.schemas.enums import VectorDBProvider
from letta.schemas.file import FileMetadata as PydanticFileMetadata
from letta.schemas.passage import Passage as PydanticPassage
from letta.schemas.user import User as PydanticUser
from letta.server.db import db_registry
from letta.services.archive_manager import ArchiveManager
from letta.settings import settings
from letta.utils import enforce_types

logger = get_logger(__name__)


@async_redis_cache(key_func=lambda text, model, endpoint: f"{model}:{endpoint}:{text}")
async def get_openai_embedding_async(text: str, model: str, endpoint: str) -> list[float]:
    from letta.settings import model_settings

    client = AsyncOpenAI(api_key=model_settings.openai_api_key, base_url=endpoint, max_retries=0)
    response = await client.embeddings.create(input=text, model=model)
    return response.data[0].embedding


class PassageManager:
    """Manager class to handle business logic related to Passages."""

    def __init__(self):
        self.archive_manager = ArchiveManager()

    async def _create_tags_for_passage(
        self,
        session: AsyncSession,
        passage_id: str,
        archive_id: str,
        organization_id: str,
        tags: List[str],
        actor: PydanticUser,
    ) -> List[PassageTag]:
        """Create tag entries in junction table (complements tags stored in JSON column).

        Junction table enables efficient DISTINCT queries and tag-based filtering.

        Note: Tags are already deduplicated before being passed to this method.
        """
        if not tags:
            return []

        tag_objects = []
        for tag in tags:
            tag_obj = PassageTag(
                id=f"passage-tag-{uuid.uuid4()}",
                tag=tag,
                passage_id=passage_id,
                archive_id=archive_id,
                organization_id=organization_id,
            )
            tag_objects.append(tag_obj)

        # batch create all tags
        created_tags = await PassageTag.batch_create_async(
            items=tag_objects,
            db_session=session,
            actor=actor,
        )

        return created_tags

    # AGENT PASSAGE METHODS
    @enforce_types
    @trace_method
    async def get_agent_passage_by_id_async(self, passage_id: str, actor: PydanticUser) -> Optional[PydanticPassage]:
        """Fetch an agent passage by ID."""
        async with db_registry.async_session() as session:
            try:
                passage = await ArchivalPassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                return passage.to_pydantic()
            except NoResultFound:
                raise NoResultFound(f"Agent passage with id {passage_id} not found in database.")

    # SOURCE PASSAGE METHODS
    @enforce_types
    @trace_method
    async def get_source_passage_by_id_async(self, passage_id: str, actor: PydanticUser) -> Optional[PydanticPassage]:
        """Fetch a source passage by ID."""
        async with db_registry.async_session() as session:
            try:
                passage = await SourcePassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                return passage.to_pydantic()
            except NoResultFound:
                raise NoResultFound(f"Source passage with id {passage_id} not found in database.")

    @enforce_types
    @trace_method
    async def get_passage_by_id_async(self, passage_id: str, actor: PydanticUser) -> Optional[PydanticPassage]:
        """DEPRECATED: Use get_agent_passage_by_id_async() or get_source_passage_by_id_async() instead."""
        logger.warning(
            "get_passage_by_id_async is deprecated. Use get_agent_passage_by_id_async() or get_source_passage_by_id_async() instead."
        )

        async with db_registry.async_session() as session:
            # Try source passages first
            try:
                passage = await SourcePassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                return passage.to_pydantic()
            except NoResultFound:
                # Try archival passages
                try:
                    passage = await ArchivalPassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                    return passage.to_pydantic()
                except NoResultFound:
                    raise NoResultFound(f"Passage with id {passage_id} not found in database.")

    @enforce_types
    @trace_method
    async def create_agent_passage_async(self, pydantic_passage: PydanticPassage, actor: PydanticUser) -> PydanticPassage:
        """Create a new agent passage."""
        if not pydantic_passage.archive_id:
            raise ValueError("Agent passage must have archive_id")
        if pydantic_passage.source_id:
            raise ValueError("Agent passage cannot have source_id")

        data = pydantic_passage.model_dump(to_orm=True)

        # Deduplicate tags if provided (for dual storage consistency)
        tags = data.get("tags")
        if tags:
            tags = list(set(tags))

        # Pad embeddings to MAX_EMBEDDING_DIM for pgvector (only when using Postgres as vector DB)
        embedding = data["embedding"]
        if embedding:
            import numpy as np

            from letta.helpers.tpuf_client import should_use_tpuf

            # Always pad when writing to Postgres vector DB (don't pad for Turbopuffer/Pinecone)
            if not should_use_tpuf():
                np_embedding = np.array(embedding)
                if np_embedding.shape[0] != MAX_EMBEDDING_DIM:
                    embedding = np.pad(np_embedding, (0, MAX_EMBEDDING_DIM - np_embedding.shape[0]), mode="constant").tolist()

        # Sanitize text to remove null bytes which PostgreSQL rejects
        text = data["text"]
        if text and "\x00" in text:
            text = text.replace("\x00", "")
            logger.warning(f"Removed null bytes from passage text (length: {len(data['text'])} -> {len(text)})")

        common_fields = {
            "id": data.get("id"),
            "text": text,
            "embedding": embedding,
            "embedding_config": data["embedding_config"],
            "organization_id": data["organization_id"],
            "metadata_": data.get("metadata_", {}),
            "tags": tags,
            "is_deleted": data.get("is_deleted", False),
            "created_at": data.get("created_at", datetime.now(timezone.utc)),
        }
        agent_fields = {"archive_id": data["archive_id"]}
        passage = ArchivalPassage(**common_fields, **agent_fields)

        async with db_registry.async_session() as session:
            passage = await passage.create_async(session, actor=actor)

            # dual storage: save tags to junction table for efficient queries
            if tags:  # use the deduplicated tags variable
                await self._create_tags_for_passage(
                    session=session,
                    passage_id=passage.id,
                    archive_id=passage.archive_id,
                    organization_id=passage.organization_id,
                    tags=tags,  # pass deduplicated tags
                    actor=actor,
                )

            return passage.to_pydantic()

    @enforce_types
    @trace_method
    async def create_source_passage_async(
        self, pydantic_passage: PydanticPassage, file_metadata: PydanticFileMetadata, actor: PydanticUser
    ) -> PydanticPassage:
        """Create a new source passage."""
        if not pydantic_passage.source_id:
            raise ValueError("Source passage must have source_id")
        if pydantic_passage.archive_id:
            raise ValueError("Source passage cannot have archive_id")

        data = pydantic_passage.model_dump(to_orm=True)

        # Deduplicate tags if provided (for dual storage consistency)
        tags = data.get("tags")
        if tags:
            tags = list(set(tags))

        # Pad embeddings to MAX_EMBEDDING_DIM for pgvector (only when using Postgres as vector DB)
        embedding = data["embedding"]
        if embedding:
            import numpy as np

            from letta.helpers.tpuf_client import should_use_tpuf

            # Always pad when writing to Postgres vector DB (don't pad for Turbopuffer/Pinecone)
            if not should_use_tpuf():
                np_embedding = np.array(embedding)
                if np_embedding.shape[0] != MAX_EMBEDDING_DIM:
                    embedding = np.pad(np_embedding, (0, MAX_EMBEDDING_DIM - np_embedding.shape[0]), mode="constant").tolist()

        # Sanitize text to remove null bytes which PostgreSQL rejects
        text = data["text"]
        if text and "\x00" in text:
            text = text.replace("\x00", "")
            logger.warning(f"Removed null bytes from passage text (length: {len(data['text'])} -> {len(text)})")

        common_fields = {
            "id": data.get("id"),
            "text": text,
            "embedding": embedding,
            "embedding_config": data["embedding_config"],
            "organization_id": data["organization_id"],
            "metadata_": data.get("metadata_", {}),
            "tags": tags,
            "is_deleted": data.get("is_deleted", False),
            "created_at": data.get("created_at", datetime.now(timezone.utc)),
        }
        source_fields = {
            "source_id": data["source_id"],
            "file_id": data.get("file_id"),
            "file_name": file_metadata.file_name,
        }
        passage = SourcePassage(**common_fields, **source_fields)

        async with db_registry.async_session() as session:
            passage = await passage.create_async(session, actor=actor)
            return passage.to_pydantic()

    @enforce_types
    @trace_method
    async def create_passage_async(self, pydantic_passage: PydanticPassage, actor: PydanticUser) -> PydanticPassage:
        """DEPRECATED: Use create_agent_passage_async() or create_source_passage_async() instead."""
        logger.warning("create_passage_async is deprecated. Use create_agent_passage_async() or create_source_passage_async() instead.")

        # Common fields for both passage types
        passage = self._preprocess_passage_for_creation(pydantic_passage=pydantic_passage)
        async with db_registry.async_session() as session:
            passage = await passage.create_async(session, actor=actor)
            return passage.to_pydantic()

    @trace_method
    def _preprocess_passage_for_creation(self, pydantic_passage: PydanticPassage) -> "SqlAlchemyBase":
        data = pydantic_passage.model_dump(to_orm=True)
        common_fields = {
            "id": data.get("id"),
            "text": data["text"],
            "embedding": data["embedding"],
            "embedding_config": data["embedding_config"],
            "organization_id": data["organization_id"],
            "metadata_": data.get("metadata_", {}),
            "tags": data.get("tags"),
            "is_deleted": data.get("is_deleted", False),
            "created_at": data.get("created_at", datetime.now(timezone.utc)),
        }

        if "archive_id" in data and data["archive_id"]:
            assert not data.get("source_id"), "Passage cannot have both archive_id and source_id"
            agent_fields = {
                "archive_id": data["archive_id"],
            }
            passage = ArchivalPassage(**common_fields, **agent_fields)
        elif "source_id" in data and data["source_id"]:
            assert not data.get("archive_id"), "Passage cannot have both archive_id and source_id"
            source_fields = {
                "source_id": data["source_id"],
                "file_id": data.get("file_id"),
            }
            passage = SourcePassage(**common_fields, **source_fields)
        else:
            raise ValueError("Passage must have either archive_id or source_id")

        return passage

    @enforce_types
    @trace_method
    def create_many_agent_passages(self, passages: List[PydanticPassage], actor: PydanticUser) -> List[PydanticPassage]:
        """Create multiple agent passages."""
        return [self.create_agent_passage(p, actor) for p in passages]

    @enforce_types
    @trace_method
    async def create_many_archival_passages_async(self, passages: List[PydanticPassage], actor: PydanticUser) -> List[PydanticPassage]:
        """Create multiple archival passages."""
        archival_passages = []
        for p in passages:
            if not p.archive_id:
                raise ValueError("Archival passage must have archive_id")
            if p.source_id:
                raise ValueError("Archival passage cannot have source_id")

            data = p.model_dump(to_orm=True)

            # Pad embeddings to MAX_EMBEDDING_DIM for pgvector (only when using Postgres as vector DB)
            embedding = data["embedding"]
            if embedding:
                import numpy as np

                from letta.helpers.tpuf_client import should_use_tpuf

                # Always pad when writing to Postgres vector DB (don't pad for Turbopuffer/Pinecone)
                if not should_use_tpuf():
                    np_embedding = np.array(embedding)
                    if np_embedding.shape[0] != MAX_EMBEDDING_DIM:
                        embedding = np.pad(np_embedding, (0, MAX_EMBEDDING_DIM - np_embedding.shape[0]), mode="constant").tolist()

            common_fields = {
                "id": data.get("id"),
                "text": data["text"],
                "embedding": embedding,
                "embedding_config": data["embedding_config"],
                "organization_id": data["organization_id"],
                "metadata_": data.get("metadata_", {}),
                "tags": data.get("tags"),
                "is_deleted": data.get("is_deleted", False),
                "created_at": data.get("created_at", datetime.now(timezone.utc)),
            }
            archival_fields = {"archive_id": data["archive_id"]}
            archival_passages.append(ArchivalPassage(**common_fields, **archival_fields))

        async with db_registry.async_session() as session:
            archival_created = await ArchivalPassage.batch_create_async(items=archival_passages, db_session=session, actor=actor)
            return [p.to_pydantic() for p in archival_created]

    @enforce_types
    @trace_method
    def create_many_source_passages(
        self, passages: List[PydanticPassage], file_metadata: PydanticFileMetadata, actor: PydanticUser
    ) -> List[PydanticPassage]:
        """Create multiple source passages."""
        return [self.create_source_passage(p, file_metadata, actor) for p in passages]

    @enforce_types
    @trace_method
    async def create_many_source_passages_async(
        self, passages: List[PydanticPassage], file_metadata: PydanticFileMetadata, actor: PydanticUser
    ) -> List[PydanticPassage]:
        """Create multiple source passages."""
        source_passages = []
        for p in passages:
            if not p.source_id:
                raise ValueError("Source passage must have source_id")
            if p.archive_id:
                raise ValueError("Source passage cannot have archive_id")

            data = p.model_dump(to_orm=True)

            # Pad embeddings to MAX_EMBEDDING_DIM for pgvector (always pad when writing to Postgres)
            embedding = data["embedding"]
            if embedding:
                import numpy as np

                from letta.helpers.tpuf_client import should_use_tpuf

                # Always pad when writing to Postgres vector DB (don't pad for Turbopuffer/Pinecone)
                if not should_use_tpuf():
                    np_embedding = np.array(embedding)
                    if np_embedding.shape[0] != MAX_EMBEDDING_DIM:
                        embedding = np.pad(np_embedding, (0, MAX_EMBEDDING_DIM - np_embedding.shape[0]), mode="constant").tolist()

            common_fields = {
                "id": data.get("id"),
                "text": data["text"],
                "embedding": embedding,
                "embedding_config": data["embedding_config"],
                "organization_id": data["organization_id"],
                "metadata_": data.get("metadata_", {}),
                "tags": data.get("tags"),
                "is_deleted": data.get("is_deleted", False),
                "created_at": data.get("created_at", datetime.now(timezone.utc)),
            }
            source_fields = {
                "source_id": data["source_id"],
                "file_id": data.get("file_id"),
                "file_name": file_metadata.file_name,
            }
            source_passages.append(SourcePassage(**common_fields, **source_fields))

        async with db_registry.async_session() as session:
            source_created = await SourcePassage.batch_create_async(items=source_passages, db_session=session, actor=actor)
            return [p.to_pydantic() for p in source_created]

    # DEPRECATED - Use specific methods above
    @enforce_types
    @trace_method
    def create_many_passages(self, passages: List[PydanticPassage], actor: PydanticUser) -> List[PydanticPassage]:
        """DEPRECATED: Use create_many_agent_passages() or create_many_source_passages() instead."""
        import warnings

        logger.warning(
            "create_many_passages is deprecated. Use create_many_agent_passages() or create_many_source_passages() instead.",
            stacklevel=2,
        )
        return [self.create_passage(p, actor) for p in passages]

    @enforce_types
    @trace_method
    async def create_many_passages_async(self, passages: List[PydanticPassage], actor: PydanticUser) -> List[PydanticPassage]:
        """DEPRECATED: Use create_many_agent_passages_async() or create_many_source_passages_async() instead."""
        import warnings

        logger.warning(
            "create_many_passages_async is deprecated. Use create_many_agent_passages_async() or create_many_source_passages_async() instead.",
            stacklevel=2,
        )

        async with db_registry.async_session() as session:
            agent_passages = []
            source_passages = []

            for p in passages:
                model = self._preprocess_passage_for_creation(p)
                if isinstance(model, ArchivalPassage):
                    agent_passages.append(model)
                elif isinstance(model, SourcePassage):
                    source_passages.append(model)
                else:
                    raise TypeError(f"Unexpected passage type: {type(model)}")

            results = []
            if agent_passages:
                agent_created = await ArchivalPassage.batch_create_async(items=agent_passages, db_session=session, actor=actor)
                results.extend(agent_created)
            if source_passages:
                source_created = await SourcePassage.batch_create_async(items=source_passages, db_session=session, actor=actor)
                results.extend(source_created)

            return [p.to_pydantic() for p in results]

    @enforce_types
    @trace_method
    async def insert_passage(
        self,
        agent_state: AgentState,
        text: str,
        actor: PydanticUser,
        tags: Optional[List[str]] = None,
        created_at: Optional[datetime] = None,
        strict_mode: bool = False,
    ) -> List[PydanticPassage]:
        """Insert passage(s) into archival memory

        Args:
            agent_state: Agent state for embedding configuration
            text: Text content to store as passages
            actor: User performing the operation
            tags: Optional list of tags to attach to all created passages

        Returns:
            List of created passage objects
        """
        if agent_state.embedding_config is None:
            raise EmbeddingConfigRequiredError(agent_id=agent_state.id, operation="insert_passage")

        embedding_chunk_size = agent_state.embedding_config.embedding_chunk_size
        embedding_client = LLMClient.create(
            provider_type=agent_state.embedding_config.embedding_endpoint_type,
            actor=actor,
        )

        # Get or create the default archive for the agent
        archive = await self.archive_manager.get_or_create_default_archive_for_agent_async(agent_state=agent_state, actor=actor)

        # TODO: check to make sure token count is okay for embedding model
        text_chunks = [text]

        if not text_chunks:
            return []

        try:
            # Generate embeddings for all chunks using the new async API
            embeddings = await embedding_client.request_embeddings(text_chunks, agent_state.embedding_config)

            passages = []

            # Always write to SQL database first
            for chunk_text, embedding in zip(text_chunks, embeddings):
                passage_data = {
                    "organization_id": actor.organization_id,
                    "archive_id": archive.id,
                    "text": chunk_text,
                    "embedding": embedding,
                    "embedding_config": agent_state.embedding_config,
                    "tags": tags,
                }
                # only include created_at if provided
                if created_at is not None:
                    passage_data["created_at"] = created_at

                passage = await self.create_agent_passage_async(
                    PydanticPassage(**passage_data),
                    actor=actor,
                )
                passages.append(passage)

            # If archive uses Turbopuffer, also write to Turbopuffer (dual-write)
            if archive.vector_db_provider == VectorDBProvider.TPUF:
                try:
                    from letta.helpers.tpuf_client import TurbopufferClient

                    tpuf_client = TurbopufferClient()

                    # Extract IDs and texts from the created passages
                    passage_ids = [p.id for p in passages]
                    passage_texts = [p.text for p in passages]

                    # Insert to Turbopuffer with the same IDs as SQL
                    # TurbopufferClient will generate embeddings internally using default config
                    await tpuf_client.insert_archival_memories(
                        archive_id=archive.id,
                        text_chunks=passage_texts,
                        passage_ids=passage_ids,  # Use same IDs as SQL
                        organization_id=actor.organization_id,
                        actor=actor,
                        tags=tags,
                        created_at=passages[0].created_at if passages else None,
                    )
                except Exception as e:
                    logger.error(f"Failed to insert passages to Turbopuffer: {e}")
                    if strict_mode:
                        raise  # Re-raise the exception in strict mode

            return passages

        except Exception as e:
            raise e

    async def _generate_embeddings_concurrent(self, text_chunks: List[str], embedding_config, actor: PydanticUser) -> List[List[float]]:
        """Generate embeddings for all text chunks concurrently using LLMClient"""

        embedding_client = LLMClient.create(
            provider_type=embedding_config.embedding_endpoint_type,
            actor=actor,
        )

        embeddings = await embedding_client.request_embeddings(text_chunks, embedding_config)
        return embeddings

    @enforce_types
    @trace_method
    async def update_agent_passage_by_id_async(
        self, passage_id: str, passage: PydanticPassage, actor: PydanticUser, **kwargs
    ) -> Optional[PydanticPassage]:
        """Update an agent passage."""
        if not passage_id:
            raise ValueError("Passage ID must be provided.")

        async with db_registry.async_session() as session:
            try:
                curr_passage = await ArchivalPassage.read_async(
                    db_session=session,
                    identifier=passage_id,
                    actor=actor,
                )
            except NoResultFound:
                raise ValueError(f"Agent passage with id {passage_id} does not exist.")

            # Update the database record with values from the provided record
            update_data = passage.model_dump(to_orm=True, exclude_unset=True, exclude_none=True)

            # Handle tags update separately for junction table
            new_tags = update_data.pop("tags", None)
            if new_tags is not None:
                # Deduplicate tags
                if new_tags:
                    new_tags = list(set(new_tags))

                # Delete existing tags from junction table
                from sqlalchemy import delete

                await session.execute(delete(PassageTag).where(PassageTag.passage_id == passage_id))

                # Create new tags in junction table
                if new_tags:
                    await self._create_tags_for_passage(
                        session=session,
                        passage_id=passage_id,
                        archive_id=curr_passage.archive_id,
                        organization_id=curr_passage.organization_id,
                        tags=new_tags,
                        actor=actor,
                    )

                # Update the tags on the passage object
                setattr(curr_passage, "tags", new_tags)

            # Pad embeddings if needed (only when using Postgres as vector DB)
            if "embedding" in update_data and update_data["embedding"]:
                import numpy as np

                from letta.helpers.tpuf_client import should_use_tpuf

                # Always pad when writing to Postgres vector DB (don't pad for Turbopuffer/Pinecone)
                if not should_use_tpuf():
                    embedding = update_data["embedding"]
                    np_embedding = np.array(embedding)
                    if np_embedding.shape[0] != MAX_EMBEDDING_DIM:
                        update_data["embedding"] = np.pad(
                            np_embedding, (0, MAX_EMBEDDING_DIM - np_embedding.shape[0]), mode="constant"
                        ).tolist()

            # Update other fields
            for key, value in update_data.items():
                setattr(curr_passage, key, value)

            # Commit changes
            await curr_passage.update_async(session, actor=actor)
            return curr_passage.to_pydantic()

    @enforce_types
    @trace_method
    async def update_source_passage_by_id_async(
        self, passage_id: str, passage: PydanticPassage, actor: PydanticUser, **kwargs
    ) -> Optional[PydanticPassage]:
        """Update a source passage."""
        if not passage_id:
            raise ValueError("Passage ID must be provided.")

        async with db_registry.async_session() as session:
            try:
                curr_passage = await SourcePassage.read_async(
                    db_session=session,
                    identifier=passage_id,
                    actor=actor,
                )
            except NoResultFound:
                raise ValueError(f"Source passage with id {passage_id} does not exist.")

            # Update the database record with values from the provided record
            update_data = passage.model_dump(to_orm=True, exclude_unset=True, exclude_none=True)

            # Pad embeddings if needed (only when using Postgres as vector DB)
            if "embedding" in update_data and update_data["embedding"]:
                import numpy as np

                from letta.helpers.tpuf_client import should_use_tpuf

                # Always pad when writing to Postgres vector DB (don't pad for Turbopuffer/Pinecone)
                if not should_use_tpuf():
                    embedding = update_data["embedding"]
                    np_embedding = np.array(embedding)
                    if np_embedding.shape[0] != MAX_EMBEDDING_DIM:
                        update_data["embedding"] = np.pad(
                            np_embedding, (0, MAX_EMBEDDING_DIM - np_embedding.shape[0]), mode="constant"
                        ).tolist()

            for key, value in update_data.items():
                setattr(curr_passage, key, value)

            # Commit changes
            await curr_passage.update_async(session, actor=actor)
            return curr_passage.to_pydantic()

    @enforce_types
    @trace_method
    async def delete_agent_passage_by_id_async(self, passage_id: str, actor: PydanticUser, strict_mode: bool = False) -> bool:
        """Delete an agent passage."""
        if not passage_id:
            raise ValueError("Passage ID must be provided.")

        async with db_registry.async_session() as session:
            try:
                passage = await ArchivalPassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                archive_id = passage.archive_id

                # Delete from SQL first
                await passage.hard_delete_async(session, actor=actor)

                # Check if archive uses Turbopuffer and dual-delete
                if archive_id:
                    archive = await self.archive_manager.get_archive_by_id_async(archive_id=archive_id, actor=actor)
                    if archive.vector_db_provider == VectorDBProvider.TPUF:
                        try:
                            from letta.helpers.tpuf_client import TurbopufferClient

                            tpuf_client = TurbopufferClient()
                            await tpuf_client.delete_passage(archive_id=archive_id, passage_id=passage_id)
                        except Exception as e:
                            logger.error(f"Failed to delete passage from Turbopuffer: {e}")
                            if strict_mode:
                                raise  # Re-raise the exception in strict mode

                return True
            except NoResultFound:
                raise NoResultFound(f"Agent passage with id {passage_id} not found.")

    @enforce_types
    @trace_method
    async def delete_source_passage_by_id_async(self, passage_id: str, actor: PydanticUser) -> bool:
        """Delete a source passage."""
        if not passage_id:
            raise ValueError("Passage ID must be provided.")

        async with db_registry.async_session() as session:
            try:
                passage = await SourcePassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                await passage.hard_delete_async(session, actor=actor)
                return True
            except NoResultFound:
                raise NoResultFound(f"Source passage with id {passage_id} not found.")

    @enforce_types
    @trace_method
    async def delete_passage_by_id_async(self, passage_id: str, actor: PydanticUser) -> bool:
        """DEPRECATED: Use delete_agent_passage_by_id_async() or delete_source_passage_by_id_async() instead."""
        import warnings

        logger.warning(
            "delete_passage_by_id_async is deprecated. Use delete_agent_passage_by_id_async() or delete_source_passage_by_id_async() instead.",
            stacklevel=2,
        )

        if not passage_id:
            raise ValueError("Passage ID must be provided.")

        async with db_registry.async_session() as session:
            # Try source passages first
            try:
                passage = await SourcePassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                await passage.hard_delete_async(session, actor=actor)
                return True
            except NoResultFound:
                # Try archival passages
                try:
                    passage = await ArchivalPassage.read_async(db_session=session, identifier=passage_id, actor=actor)
                    await passage.hard_delete_async(session, actor=actor)
                    return True
                except NoResultFound:
                    raise NoResultFound(f"Passage with id {passage_id} not found.")

    @enforce_types
    @trace_method
    def delete_agent_passages(
        self,
        actor: PydanticUser,
        passages: List[PydanticPassage],
    ) -> bool:
        """Delete multiple agent passages."""
        # TODO: This is very inefficient
        # TODO: We should have a base `delete_all_matching_filters`-esque function
        for passage in passages:
            self.delete_agent_passage_by_id(passage_id=passage.id, actor=actor)
        return True

    @enforce_types
    @trace_method
    async def delete_agent_passages_async(
        self,
        passages: List[PydanticPassage],
        actor: PydanticUser,
        strict_mode: bool = False,
    ) -> bool:
        """Delete multiple agent passages."""
        if not passages:
            return True

        async with db_registry.async_session() as session:
            # Delete from SQL first
            await ArchivalPassage.bulk_hard_delete_async(db_session=session, identifiers=[p.id for p in passages], actor=actor)

            # Group passages by archive_id for efficient Turbopuffer deletion
            passages_by_archive = {}
            for passage in passages:
                if passage.archive_id:
                    if passage.archive_id not in passages_by_archive:
                        passages_by_archive[passage.archive_id] = []
                    passages_by_archive[passage.archive_id].append(passage.id)

            # Check each archive and delete from Turbopuffer if needed
            for archive_id, passage_ids in passages_by_archive.items():
                archive = await self.archive_manager.get_archive_by_id_async(archive_id=archive_id, actor=actor)
                if archive.vector_db_provider == VectorDBProvider.TPUF:
                    try:
                        from letta.helpers.tpuf_client import TurbopufferClient

                        tpuf_client = TurbopufferClient()
                        await tpuf_client.delete_passages(archive_id=archive_id, passage_ids=passage_ids)
                    except Exception as e:
                        logger.error(f"Failed to delete passages from Turbopuffer: {e}")
                        if strict_mode:
                            raise  # Re-raise the exception in strict mode

            return True

    @enforce_types
    @trace_method
    def delete_source_passages(
        self,
        actor: PydanticUser,
        passages: List[PydanticPassage],
    ) -> bool:
        """Delete multiple source passages."""
        # TODO: This is very inefficient
        # TODO: We should have a base `delete_all_matching_filters`-esque function
        for passage in passages:
            self.delete_source_passage_by_id(passage_id=passage.id, actor=actor)
        return True

    @enforce_types
    @trace_method
    async def delete_source_passages_async(
        self,
        actor: PydanticUser,
        passages: List[PydanticPassage],
    ) -> bool:
        async with db_registry.async_session() as session:
            await SourcePassage.bulk_hard_delete_async(db_session=session, identifiers=[p.id for p in passages], actor=actor)
            return True

    # DEPRECATED - Use specific methods above
    @enforce_types
    @trace_method
    def delete_passages(
        self,
        actor: PydanticUser,
        passages: List[PydanticPassage],
    ) -> bool:
        """DEPRECATED: Use delete_agent_passages() or delete_source_passages() instead."""
        import warnings

        logger.warning(
            "delete_passages is deprecated. Use delete_agent_passages() or delete_source_passages() instead.",
            stacklevel=2,
        )
        # TODO: This is very inefficient
        # TODO: We should have a base `delete_all_matching_filters`-esque function
        for passage in passages:
            self.delete_passage_by_id(passage_id=passage.id, actor=actor)
        return True

    # DEPRECATED - Use agent_passage_size() instead since this only counted agent passages anyway
    @enforce_types
    @trace_method
    def size(
        self,
        actor: PydanticUser,
        agent_id: Optional[str] = None,
    ) -> int:
        """DEPRECATED: Use agent_passage_size() instead (this only counted agent passages anyway)."""
        import warnings

        logger.warning("size is deprecated. Use agent_passage_size() instead.", stacklevel=2)
        return self.agent_passage_size(actor=actor, agent_id=agent_id)

    @enforce_types
    @trace_method
    async def agent_passage_size_async(
        self,
        actor: PydanticUser,
        agent_id: Optional[str] = None,
    ) -> int:
        """Get the total count of agent passages with optional filters.
        Args:
            actor: The user requesting the count
            agent_id: The agent ID of the messages
        """
        async with db_registry.async_session() as session:
            if agent_id:
                # Count passages through the archives relationship
                from sqlalchemy import func, select

                result = await session.execute(
                    select(func.count(ArchivalPassage.id))
                    .join(ArchivesAgents, ArchivalPassage.archive_id == ArchivesAgents.archive_id)
                    .where(
                        ArchivesAgents.agent_id == agent_id,
                        ArchivalPassage.organization_id == actor.organization_id,
                        ArchivalPassage.is_deleted == False,
                    )
                )
                return result.scalar() or 0
            else:
                # Count all archival passages in the organization
                return await ArchivalPassage.size_async(db_session=session, actor=actor)

    @enforce_types
    @trace_method
    async def source_passage_size_async(
        self,
        actor: PydanticUser,
        source_id: Optional[str] = None,
    ) -> int:
        """Get the total count of source passages with optional filters.
        Args:
            actor: The user requesting the count
            source_id: The source ID of the passages
        """
        async with db_registry.async_session() as session:
            return await SourcePassage.size_async(db_session=session, actor=actor, source_id=source_id)

    @enforce_types
    @trace_method
    async def estimate_embeddings_size_async(
        self,
        actor: PydanticUser,
        agent_id: Optional[str] = None,
        storage_unit: str = "GB",
    ) -> float:
        """
        Estimate the size of the embeddings. Defaults to GB.
        """
        BYTES_PER_STORAGE_UNIT = {
            "B": 1,
            "KB": 1024,
            "MB": 1024**2,
            "GB": 1024**3,
            "TB": 1024**4,
        }
        if storage_unit not in BYTES_PER_STORAGE_UNIT:
            raise ValueError(f"Invalid storage unit: {storage_unit}. Must be one of {list(BYTES_PER_STORAGE_UNIT.keys())}.")
        BYTES_PER_EMBEDDING_DIM = 4
        GB_PER_EMBEDDING = BYTES_PER_EMBEDDING_DIM / BYTES_PER_STORAGE_UNIT[storage_unit] * MAX_EMBEDDING_DIM
        return await self.agent_passage_size_async(actor=actor, agent_id=agent_id) * GB_PER_EMBEDDING

    @enforce_types
    @trace_method
    async def list_passages_by_file_id_async(self, file_id: str, actor: PydanticUser) -> List[PydanticPassage]:
        """
        List all source passages associated with a given file_id.
        """
        async with db_registry.async_session() as session:
            result = await session.execute(
                select(SourcePassage)
                .options(noload(SourcePassage.organization))
                .where(SourcePassage.file_id == file_id)
                .where(SourcePassage.organization_id == actor.organization_id)
            )
            passages = result.scalars().all()
            return [p.to_pydantic() for p in passages]

    @enforce_types
    @trace_method
    async def get_unique_tags_for_archive_async(
        self,
        archive_id: str,
        actor: PydanticUser,
    ) -> List[str]:
        """Get all unique tags for an archive.

        Args:
            archive_id: ID of the archive
            actor: User performing the operation

        Returns:
            List of unique tag values
        """
        async with db_registry.async_session() as session:
            stmt = (
                select(PassageTag.tag)
                .distinct()
                .where(
                    PassageTag.archive_id == archive_id,
                    PassageTag.organization_id == actor.organization_id,
                    PassageTag.is_deleted == False,
                )
                .order_by(PassageTag.tag)
            )

            result = await session.execute(stmt)
            tags = result.scalars().all()

            return list(tags)

    @enforce_types
    @trace_method
    async def get_tag_counts_for_archive_async(
        self,
        archive_id: str,
        actor: PydanticUser,
    ) -> Dict[str, int]:
        """Get tag counts for an archive.

        Args:
            archive_id: ID of the archive
            actor: User performing the operation

        Returns:
            Dictionary mapping tag values to their counts
        """
        async with db_registry.async_session() as session:
            stmt = (
                select(PassageTag.tag, func.count(PassageTag.id).label("count"))
                .where(
                    PassageTag.archive_id == archive_id,
                    PassageTag.organization_id == actor.organization_id,
                    PassageTag.is_deleted == False,
                )
                .group_by(PassageTag.tag)
                .order_by(PassageTag.tag)
            )

            result = await session.execute(stmt)
            rows = result.all()

            return {row.tag: row.count for row in rows}
