import json
from datetime import datetime
from io import BytesIO
from pathlib import Path
from typing import Any, Optional
from uuid import UUID

import aiofiles

from shared.api.models.base import WrappedBooleanResponse
from shared.api.models.ingestion.responses import WrappedIngestionResponse
from shared.api.models.management.responses import (
    WrappedChunksResponse,
    WrappedCollectionsResponse,
    WrappedDocumentResponse,
    WrappedDocumentsResponse,
)

from ..models import IngestionMode, SearchMode, SearchSettings


class DocumentsSDK:
    """
    SDK for interacting with documents in the v3 API.
    """

    def __init__(self, client):
        self.client = client

    async def create(
        self,
        file_path: Optional[str] = None,
        raw_text: Optional[str] = None,
        chunks: Optional[list[str]] = None,
        id: Optional[str | UUID] = None,
        ingestion_mode: Optional[str] = None,
        collection_ids: Optional[list[str | UUID]] = None,
        metadata: Optional[dict] = None,
        ingestion_config: Optional[dict | IngestionMode] = None,
        run_with_orchestration: Optional[bool] = True,
    ) -> WrappedIngestionResponse:
        """
        Create a new document from either a file or content.

        Args:
            file_path (Optional[str]): The file to upload, if any
            content (Optional[str]): Optional text content to upload, if no file path is provided
            id (Optional[str | UUID]): Optional ID to assign to the document
            collection_ids (Optional[list[str | UUID]]): Collection IDs to associate with the document. If none are provided, the document will be assigned to the user's default collection.
            metadata (Optional[dict]): Optional metadata to assign to the document
            ingestion_config (Optional[dict]): Optional ingestion configuration to use
            run_with_orchestration (Optional[bool]): Whether to run with orchestration
        """
        if not file_path and not raw_text and not chunks:
            raise ValueError(
                "Either `file_path`, `raw_text` or `chunks` must be provided"
            )
        if (
            (file_path and raw_text)
            or (file_path and chunks)
            or (raw_text and chunks)
        ):
            raise ValueError(
                "Only one of `file_path`, `raw_text` or `chunks` may be provided"
            )

        data: dict[str, Any] = {}
        files = None

        if id:
            data["id"] = str(id)
        if metadata:
            data["metadata"] = json.dumps(metadata)
        if ingestion_config:
            if isinstance(ingestion_config, IngestionMode):
                ingestion_config = {"mode": ingestion_config.value}
            app_config: dict[str, Any] = (
                {}
                if isinstance(ingestion_config, dict)
                else ingestion_config["app"]
            )
            ingestion_config = dict(ingestion_config)
            ingestion_config["app"] = app_config
            data["ingestion_config"] = json.dumps(ingestion_config)
        if collection_ids:
            collection_ids = [str(collection_id) for collection_id in collection_ids]  # type: ignore
            data["collection_ids"] = json.dumps(collection_ids)
        if run_with_orchestration is not None:
            data["run_with_orchestration"] = str(run_with_orchestration)
        if ingestion_mode is not None:
            data["ingestion_mode"] = ingestion_mode
        if file_path:
            # Create a new file instance that will remain open during the request
            file_instance = open(file_path, "rb")
            files = [
                (
                    "file",
                    (file_path, file_instance, "application/octet-stream"),
                )
            ]
            try:
                result = await self.client._make_request(
                    "POST",
                    "documents",
                    data=data,
                    files=files,
                    version="v3",
                )
            finally:
                # Ensure we close the file after the request is complete
                file_instance.close()
            return result
        elif raw_text:
            data["raw_text"] = raw_text  # type: ignore
            return await self.client._make_request(
                "POST",
                "documents",
                data=data,
                version="v3",
            )
        else:
            data["chunks"] = json.dumps(chunks)
            return await self.client._make_request(
                "POST",
                "documents",
                data=data,
                version="v3",
            )

    async def retrieve(
        self,
        id: str | UUID,
    ) -> WrappedDocumentResponse:
        """
        Get a specific document by ID.

        Args:
            id (str | UUID): ID of document to retrieve

        Returns:
            dict: Document information
        """
        return await self.client._make_request(
            "GET",
            f"documents/{str(id)}",
            version="v3",
        )

    async def download(
        self,
        id: str | UUID,
    ) -> BytesIO:
        response = await self.client._make_request(
            "GET",
            f"documents/{str(id)}/download",
            version="v3",
        )
        if not isinstance(response, BytesIO):
            raise ValueError("Expected BytesIO response")
        return response

    async def download_zip(
        self,
        document_ids: Optional[list[str | UUID]] = None,
        start_date: Optional[datetime] = None,
        end_date: Optional[datetime] = None,
        output_path: Optional[str | Path] = None,
    ) -> BytesIO | None:
        """
        Download multiple documents as a zip file.
        """
        params: dict[str, Any] = {}
        if document_ids:
            params["document_ids"] = [str(doc_id) for doc_id in document_ids]
        if start_date:
            params["start_date"] = start_date.isoformat()
        if end_date:
            params["end_date"] = end_date.isoformat()

        response = await self.client._make_request(
            "GET",
            "documents/download_zip",
            params=params,
            version="v3",
        )

        if not isinstance(response, BytesIO):
            raise ValueError("Expected BytesIO response")

        if output_path:
            output_path = (
                Path(output_path)
                if isinstance(output_path, str)
                else output_path
            )
            async with aiofiles.open(output_path, "wb") as f:
                await f.write(response.getvalue())
            return None

        return response

    async def export(
        self,
        output_path: str | Path,
        columns: Optional[list[str]] = None,
        filters: Optional[dict] = None,
        include_header: bool = True,
    ) -> None:
        """
        Export documents to a CSV file, streaming the results directly to disk.

        Args:
            output_path (str | Path): Local path where the CSV file should be saved
            columns (Optional[list[str]]): Specific columns to export. If None, exports default columns
            filters (Optional[dict]): Optional filters to apply when selecting documents
            include_header (bool): Whether to include column headers in the CSV (default: True)
        """
        # Convert path to string if it's a Path object
        output_path = (
            str(output_path) if isinstance(output_path, Path) else output_path
        )

        data: dict[str, Any] = {"include_header": include_header}
        if columns:
            data["columns"] = columns
        if filters:
            data["filters"] = filters

        # Stream response directly to file
        async with aiofiles.open(output_path, "wb") as f:
            async with self.client.session.post(
                f"{self.client.base_url}/v3/documents/export",
                json=data,
                headers={
                    "Accept": "text/csv",
                    **self.client._get_auth_headers(),
                },
            ) as response:
                if response.status != 200:
                    raise ValueError(
                        f"Export failed with status {response.status}",
                        response,
                    )

                async for chunk in response.content.iter_chunks():
                    if chunk:
                        await f.write(chunk[0])

    async def export_entities(
        self,
        id: str | UUID,
        output_path: str | Path,
        columns: Optional[list[str]] = None,
        filters: Optional[dict] = None,
        include_header: bool = True,
    ) -> None:
        """
        Export documents to a CSV file, streaming the results directly to disk.

        Args:
            output_path (str | Path): Local path where the CSV file should be saved
            columns (Optional[list[str]]): Specific columns to export. If None, exports default columns
            filters (Optional[dict]): Optional filters to apply when selecting documents
            include_header (bool): Whether to include column headers in the CSV (default: True)
        """
        # Convert path to string if it's a Path object
        output_path = (
            str(output_path) if isinstance(output_path, Path) else output_path
        )

        # Prepare request data
        data: dict[str, Any] = {"include_header": include_header}
        if columns:
            data["columns"] = columns
        if filters:
            data["filters"] = filters

        # Stream response directly to file
        async with aiofiles.open(output_path, "wb") as f:
            async with self.client.session.post(
                f"{self.client.base_url}/v3/documents/{str(id)}/entities/export",
                json=data,
                headers={
                    "Accept": "text/csv",
                    **self.client._get_auth_headers(),
                },
            ) as response:
                if response.status != 200:
                    raise ValueError(
                        f"Export failed with status {response.status}",
                        response,
                    )

                async for chunk in response.content.iter_chunks():
                    if chunk:
                        await f.write(chunk[0])

    async def export_relationships(
        self,
        id: str | UUID,
        output_path: str | Path,
        columns: Optional[list[str]] = None,
        filters: Optional[dict] = None,
        include_header: bool = True,
    ) -> None:
        """
        Export document relationships to a CSV file, streaming the results directly to disk.

        Args:
            output_path (str | Path): Local path where the CSV file should be saved
            columns (Optional[list[str]]): Specific columns to export. If None, exports default columns
            filters (Optional[dict]): Optional filters to apply when selecting documents
            include_header (bool): Whether to include column headers in the CSV (default: True)
        """
        # Convert path to string if it's a Path object
        output_path = (
            str(output_path) if isinstance(output_path, Path) else output_path
        )

        # Prepare request data
        data: dict[str, Any] = {"include_header": include_header}
        if columns:
            data["columns"] = columns
        if filters:
            data["filters"] = filters

        # Stream response directly to file
        async with aiofiles.open(output_path, "wb") as f:
            async with self.client.session.post(
                f"{self.client.base_url}/v3/documents/{str(id)}/relationships/export",
                json=data,
                headers={
                    "Accept": "text/csv",
                    **self.client._get_auth_headers(),
                },
            ) as response:
                if response.status != 200:
                    raise ValueError(
                        f"Export failed with status {response.status}",
                        response,
                    )

                async for chunk in response.content.iter_chunks():
                    if chunk:
                        await f.write(chunk[0])

    async def delete(
        self,
        id: str | UUID,
    ) -> WrappedBooleanResponse:
        """
        Delete a specific document.

        Args:
            id (str | UUID): ID of document to delete
        """
        return await self.client._make_request(
            "DELETE",
            f"documents/{str(id)}",
            version="v3",
        )

    async def list_chunks(
        self,
        id: str | UUID,
        include_vectors: Optional[bool] = False,
        offset: Optional[int] = 0,
        limit: Optional[int] = 100,
    ) -> WrappedChunksResponse:
        """
        Get chunks for a specific document.

        Args:
            id (str | UUID): ID of document to retrieve chunks for
            include_vectors (Optional[bool]): Whether to include vector embeddings in the response
            offset (int, optional): Specifies the number of objects to skip. Defaults to 0.
            limit (int, optional): Specifies a limit on the number of objects to return, ranging between 1 and 100. Defaults to 100.

        Returns:
            dict: List of document chunks and pagination information
        """
        params = {
            "offset": offset,
            "limit": limit,
            "include_vectors": include_vectors,
        }
        return await self.client._make_request(
            "GET",
            f"documents/{str(id)}/chunks",
            params=params,
            version="v3",
        )

    async def list_collections(
        self,
        id: str | UUID,
        include_vectors: Optional[bool] = False,
        offset: Optional[int] = 0,
        limit: Optional[int] = 100,
    ) -> WrappedCollectionsResponse:
        """
        List collections for a specific document.

        Args:
            id (str | UUID): ID of document to retrieve collections for
            offset (int, optional): Specifies the number of objects to skip. Defaults to 0.
            limit (int, optional): Specifies a limit on the number of objects to return, ranging between 1 and 100. Defaults to 100.

        Returns:
            dict: List of document chunks and pagination information
        """
        params = {
            "offset": offset,
            "limit": limit,
        }

        return await self.client._make_request(
            "GET",
            f"documents/{str(id)}/collections",
            params=params,
            version="v3",
        )

    async def delete_by_filter(
        self,
        filters: dict,
    ) -> WrappedBooleanResponse:
        """
        Delete documents based on filters.

        Args:
            filters (dict): Filters to apply when selecting documents to delete
        """
        filters_json = json.dumps(filters)
        return await self.client._make_request(
            "DELETE",
            "documents/by-filter",
            data=filters_json,
            # params={"filters": filters_json},
            # data=filters,
            version="v3",
        )

    async def extract(
        self,
        id: str | UUID,
        run_type: Optional[str] = None,
        settings: Optional[dict] = None,
        run_with_orchestration: Optional[bool] = True,
    ) -> dict:
        """
        Extract entities and relationships from a document.

        Args:
            id (str, UUID): ID of document to extract from
            run_type (Optional[str]): Whether to return an estimate or run extraction
            settings (Optional[dict]): Settings for extraction process
            run_with_orchestration (Optional[bool]): Whether to run with orchestration

        Returns:
            dict: Extraction results or cost estimate
        """
        data: dict[str, Any] = {}
        if run_type:
            data["run_type"] = run_type
        if settings:
            data["settings"] = json.dumps(settings)
        if run_with_orchestration is not None:
            data["run_with_orchestration"] = str(run_with_orchestration)

        return await self.client._make_request(
            "POST",
            f"documents/{str(id)}/extract",
            params=data,
            version="v3",
        )

    async def list_entities(
        self,
        id: str | UUID,
        offset: Optional[int] = 0,
        limit: Optional[int] = 100,
        include_embeddings: Optional[bool] = False,
    ) -> dict:
        """
        List entities extracted from a document.

        Args:
            id (str | UUID): ID of document to get entities from
            offset (Optional[int]): Number of items to skip
            limit (Optional[int]): Max number of items to return
            include_embeddings (Optional[bool]): Whether to include embeddings

        Returns:
            dict: List of entities and pagination info
        """
        params = {
            "offset": offset,
            "limit": limit,
            "include_embeddings": include_embeddings,
        }
        return await self.client._make_request(
            "GET",
            f"documents/{str(id)}/entities",
            params=params,
            version="v3",
        )

    async def list_relationships(
        self,
        id: str | UUID,
        offset: Optional[int] = 0,
        limit: Optional[int] = 100,
        entity_names: Optional[list[str]] = None,
        relationship_types: Optional[list[str]] = None,
    ) -> dict:
        """
        List relationships extracted from a document.

        Args:
            id (str | UUID): ID of document to get relationships from
            offset (Optional[int]): Number of items to skip
            limit (Optional[int]): Max number of items to return
            entity_names (Optional[list[str]]): Filter by entity names
            relationship_types (Optional[list[str]]): Filter by relationship types

        Returns:
            dict: List of relationships and pagination info
        """
        params: dict[str, Any] = {
            "offset": offset,
            "limit": limit,
        }
        if entity_names:
            params["entity_names"] = entity_names
        if relationship_types:
            params["relationship_types"] = relationship_types

        return await self.client._make_request(
            "GET",
            f"documents/{str(id)}/relationships",
            params=params,
            version="v3",
        )

    async def list(
        self,
        ids: Optional[list[str | UUID]] = None,
        offset: Optional[int] = 0,
        limit: Optional[int] = 100,
    ) -> WrappedDocumentsResponse:
        """
        List documents with pagination.

        Args:
            ids (Optional[list[str | UUID]]): Optional list of document IDs to filter by
            offset (int, optional): Specifies the number of objects to skip. Defaults to 0.
            limit (int, optional): Specifies a limit on the number of objects to return, ranging between 1 and 100. Defaults to 100.

        Returns:
            dict: List of documents and pagination information
        """
        params = {
            "offset": offset,
            "limit": limit,
        }
        if ids:
            params["ids"] = [str(doc_id) for doc_id in ids]  # type: ignore

        return await self.client._make_request(
            "GET",
            "documents",
            params=params,
            version="v3",
        )

    async def search(
        self,
        query: str,
        search_mode: Optional[str | SearchMode] = "custom",
        search_settings: Optional[dict | SearchSettings] = None,
    ):
        """
        Conduct a vector and/or KG search.

        Args:
            query (str): The query to search for.
            search_settings (Optional[dict, SearchSettings]]): Vector search settings.

        Returns:
            CombinedSearchResponse: The search response.
        """
        # if search_mode and not isinstance(search_mode, str):
        #     search_mode = search_mode.value

        if search_settings and not isinstance(search_settings, dict):
            search_settings = search_settings.model_dump()
        data: dict[str, Any] = {
            "query": query,
            "search_settings": search_settings,
        }
        if search_mode:
            data["search_mode"] = search_mode

        return await self.client._make_request(
            "POST",
            "documents/search",
            json=data,
            version="v3",
        )