"""Remote HTTP client that proxies V2 operations to a Cognee Cloud instance."""

import io
from pathlib import Path
from typing import Any, Optional
from uuid import UUID

import aiohttp

from cognee.shared.logging_utils import get_logger

logger = get_logger("serve.cloud_client")


class CloudClient:
    """Async HTTP client for a remote Cognee Cloud tenant instance.

    All requests use ``X-Api-Key`` for authentication, matching the
    SaaS backend's API key auth backend.
    """

    def __init__(self, service_url: str, api_key: str):
        self.service_url = service_url.rstrip("/")
        self.api_key = api_key
        self._session: Optional[aiohttp.ClientSession] = None

    # Default for ordinary API calls: aiohttp's standard 5-minute total,
    # with connect failures surfacing quickly.
    DEFAULT_TIMEOUT = aiohttp.ClientTimeout(total=300, sock_connect=30)
    # Archive uploads (cognee.push) plus the synchronous server-side import
    # can legitimately exceed any fixed total; per-read inactivity stays
    # bounded instead. Applied per-request, only to archive uploads.
    UPLOAD_TIMEOUT = aiohttp.ClientTimeout(total=None, sock_connect=30, sock_read=300)

    async def _get_session(self) -> aiohttp.ClientSession:
        if self._session is None or self._session.closed:
            self._session = aiohttp.ClientSession(
                headers={"X-Api-Key": self.api_key},
                timeout=self.DEFAULT_TIMEOUT,
            )
        return self._session

    async def close(self) -> None:
        if self._session and not self._session.closed:
            await self._session.close()
            self._session = None

    async def _health_check(self) -> bool:
        """Verify the remote instance is reachable."""
        try:
            session = await self._get_session()
            async with session.get(f"{self.service_url}/health") as resp:
                return resp.status == 200
        except Exception:
            return False

    # ----- V2 Operations -----

    async def remember(self, data: Any, dataset_name: str = "main_dataset", **kwargs) -> dict:
        """POST /api/v1/remember — ingest data and build knowledge graph."""
        session = await self._get_session()

        form = aiohttp.FormData()
        form.add_field("datasetName", dataset_name)

        if kwargs.get("session_id"):
            form.add_field("session_id", kwargs["session_id"])
        if kwargs.get("run_in_background"):
            form.add_field("run_in_background", "true")
        if kwargs.get("custom_prompt"):
            form.add_field("custom_prompt", kwargs["custom_prompt"])
        if kwargs.get("chunk_size") is not None:
            form.add_field("chunk_size", str(kwargs["chunk_size"]))
        if kwargs.get("chunks_per_batch") is not None:
            form.add_field("chunks_per_batch", str(kwargs["chunks_per_batch"]))
        content_type_kw = kwargs.get("content_type")
        if content_type_kw is not None:
            form.add_field("content_type", str(content_type_kw))
        if kwargs.get("import_mode") is not None:
            form.add_field("import_mode", str(kwargs["import_mode"]))

        # Skills are local SKILL.md files. The server's add_skills() reads
        # paths from its own filesystem — sending the path string verbatim
        # would have the server look for that path on the POD, not the
        # caller. For content_type="skills", read each SKILL.md and upload
        # its bytes so the server can write them to a tempdir.
        if content_type_kw == "skills" and isinstance(data, (str, Path)):
            source = Path(data).expanduser()
            if source.is_file():
                skill_files = [source] if source.name == "SKILL.md" else []
            elif source.is_dir():
                skill_files = sorted(source.rglob("SKILL.md"))
            else:
                raise FileNotFoundError(f"Skills source not found: {data}")
            if not skill_files:
                raise ValueError(f"No SKILL.md files under {data}")
            base = source if source.is_dir() else source.parent
            for skill_path in skill_files:
                # Preserve relative structure so the server can reconstruct
                # the SKILL.md layout when writing to its tempdir.
                rel = skill_path.relative_to(base).as_posix()
                form.add_field("data", skill_path.open("rb"), filename=rel)
        # Handle data — string or file-like objects
        elif isinstance(data, str):
            form.add_field(
                "data",
                io.BytesIO(data.encode("utf-8")),
                filename="data.txt",
                content_type="text/plain",
            )
        elif isinstance(data, list):
            for item in data:
                if isinstance(item, str):
                    form.add_field(
                        "data",
                        io.BytesIO(item.encode("utf-8")),
                        filename="data.txt",
                        content_type="text/plain",
                    )
                elif hasattr(item, "read"):
                    name = getattr(item, "name", "upload")
                    form.add_field("data", item, filename=name)
        elif hasattr(data, "read"):
            name = getattr(data, "name", "upload")
            form.add_field("data", data, filename=name)

        timeout = (
            self.UPLOAD_TIMEOUT
            if kwargs.get("content_type") == "cogx-archive"
            else self.DEFAULT_TIMEOUT
        )
        async with session.post(
            f"{self.service_url}/api/v1/remember", data=form, timeout=timeout
        ) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote remember failed ({resp.status}): {body}")
            return await resp.json()

    async def remember_entry(
        self,
        entry,
        dataset_name: str = "main_dataset",
        session_id: Optional[str] = None,
        skill_improvement: Optional[dict] = None,
    ) -> dict:
        """POST /api/v1/remember/entry — store a typed MemoryEntry.

        ``entry`` is a pydantic MemoryEntry.
        """
        session = await self._get_session()

        # Pydantic v2: model_dump preserves the discriminator field.
        entry_dump = entry.model_dump(mode="json")

        payload = {
            "entry": entry_dump,
            "dataset_name": dataset_name,
            "session_id": session_id,
            "skill_improvement": skill_improvement,
        }

        async with session.post(
            f"{self.service_url}/api/v1/remember/entry",
            json=payload,
        ) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote remember_entry failed ({resp.status}): {body}")
            return await resp.json()

    async def recall(self, query_text: str, query_type: Optional[str] = None, **kwargs) -> list:
        """POST /api/v1/recall — query the knowledge graph and/or session cache."""
        session = await self._get_session()

        payload: dict = {"query": query_text}
        if query_type:
            payload["search_type"] = query_type if isinstance(query_type, str) else query_type.value
        if kwargs.get("dataset_ids"):
            payload["dataset_ids"] = [str(dataset_id) for dataset_id in kwargs["dataset_ids"]]
        elif kwargs.get("datasets"):
            payload["datasets"] = kwargs["datasets"]
        if kwargs.get("top_k"):
            payload["top_k"] = kwargs["top_k"]
        if kwargs.get("system_prompt"):
            payload["system_prompt"] = kwargs["system_prompt"]
        if kwargs.get("node_name"):
            payload["node_name"] = kwargs["node_name"]
        if kwargs.get("only_context"):
            payload["only_context"] = kwargs["only_context"]
        if kwargs.get("verbose"):
            payload["verbose"] = kwargs["verbose"]
        if kwargs.get("session_id"):
            payload["session_id"] = kwargs["session_id"]
        if kwargs.get("scope") is not None:
            payload["scope"] = kwargs["scope"]
        if kwargs.get("context_profile") is not None:
            payload["context_profile"] = kwargs["context_profile"]
        if kwargs.get("include_references") is not None:
            payload["include_references"] = kwargs["include_references"]

        async with session.post(
            f"{self.service_url}/api/v1/recall",
            json=payload,
        ) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote recall failed ({resp.status}): {body}")
            return await resp.json()

    async def improve(self, dataset: Any = "main_dataset", **kwargs) -> dict:
        """POST /api/v1/improve — enrich the knowledge graph."""
        session = await self._get_session()

        payload = {}
        if isinstance(dataset, UUID):
            payload["dataset_id"] = str(dataset)
        else:
            payload["dataset_name"] = str(dataset)
        if kwargs.get("run_in_background"):
            payload["run_in_background"] = True
        if kwargs.get("node_name"):
            payload["node_name"] = kwargs["node_name"]

        async with session.post(
            f"{self.service_url}/api/v1/improve",
            json=payload,
        ) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote improve failed ({resp.status}): {body}")
            return await resp.json()

    # ----- V1 Operations (add / cognify / search) -----

    async def add(self, data: Any, dataset_name: str = "main_dataset", **kwargs) -> dict:
        """POST /api/v1/add — ingest data into a dataset."""
        session = await self._get_session()

        form = aiohttp.FormData()
        form.add_field("datasetName", dataset_name)

        if isinstance(data, str):
            form.add_field(
                "data",
                io.BytesIO(data.encode("utf-8")),
                filename="data.txt",
                content_type="text/plain",
            )
        elif isinstance(data, list):
            for item in data:
                if isinstance(item, str):
                    form.add_field(
                        "data",
                        io.BytesIO(item.encode("utf-8")),
                        filename="data.txt",
                        content_type="text/plain",
                    )
                elif hasattr(item, "read"):
                    name = getattr(item, "name", "upload")
                    form.add_field("data", item, filename=name)
        elif hasattr(data, "read"):
            name = getattr(data, "name", "upload")
            form.add_field("data", data, filename=name)

        async with session.post(f"{self.service_url}/api/v1/add", data=form) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote add failed ({resp.status}): {body}")
            return await resp.json()

    async def cognify(self, datasets: Any = None, **kwargs) -> dict:
        """POST /api/v1/cognify — build the knowledge graph."""
        session = await self._get_session()

        payload: dict = {}
        if datasets:
            payload["datasets"] = (
                [str(d) for d in datasets] if isinstance(datasets, list) else [str(datasets)]
            )
        if kwargs.get("run_in_background"):
            payload["run_in_background"] = True
        if kwargs.get("custom_prompt"):
            payload["custom_prompt"] = kwargs["custom_prompt"]
        if kwargs.get("chunk_size") is not None:
            payload["chunk_size"] = kwargs["chunk_size"]
        if kwargs.get("chunks_per_batch") is not None:
            payload["chunks_per_batch"] = kwargs["chunks_per_batch"]

        async with session.post(
            f"{self.service_url}/api/v1/cognify",
            json=payload,
        ) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote cognify failed ({resp.status}): {body}")
            return await resp.json()

    async def search(self, query: str, **kwargs) -> list:
        """POST /api/v1/search — query the knowledge graph."""
        session = await self._get_session()

        payload: dict = {"query": query}
        if kwargs.get("search_type"):
            st = kwargs["search_type"]
            payload["searchType"] = st if isinstance(st, str) else st.value
        if kwargs.get("datasets"):
            payload["datasets"] = kwargs["datasets"]
        if kwargs.get("dataset_ids"):
            dataset_ids = kwargs["dataset_ids"]
            if isinstance(dataset_ids, UUID):
                dataset_ids = [dataset_ids]
            payload["datasetIds"] = [str(dataset_id) for dataset_id in dataset_ids]
        if kwargs.get("top_k") is not None:
            payload["topK"] = kwargs["top_k"]
        if kwargs.get("system_prompt"):
            payload["systemPrompt"] = kwargs["system_prompt"]
        if kwargs.get("node_name"):
            payload["nodeName"] = kwargs["node_name"]
        if kwargs.get("only_context") is not None:
            payload["onlyContext"] = kwargs["only_context"]
        if kwargs.get("verbose") is not None:
            payload["verbose"] = kwargs["verbose"]
        if kwargs.get("skills") is not None:
            payload["skills"] = [
                skill.name if hasattr(skill, "name") else str(skill) for skill in kwargs["skills"]
            ]
        if kwargs.get("tools") is not None:
            payload["tools"] = kwargs["tools"]
        if kwargs.get("max_iter") is not None:
            payload["maxIter"] = kwargs["max_iter"]
        if kwargs.get("include_references") is not None:
            payload["includeReferences"] = kwargs["include_references"]

        async with session.post(
            f"{self.service_url}/api/v1/search",
            json=payload,
        ) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote search failed ({resp.status}): {body}")
            return await resp.json()

    async def forget(self, **kwargs) -> dict:
        """POST /api/v1/forget — delete data from the knowledge graph."""
        session = await self._get_session()

        payload = {}
        if kwargs.get("everything"):
            payload["everything"] = True
        if kwargs.get("dataset"):
            payload["dataset"] = str(kwargs["dataset"])
        if kwargs.get("dataset_id"):
            payload["dataset_id"] = str(kwargs["dataset_id"])
        if kwargs.get("data_id"):
            payload["data_id"] = str(kwargs["data_id"])
        if kwargs.get("memory_only") is not None:
            payload["memory_only"] = bool(kwargs["memory_only"])

        async with session.post(
            f"{self.service_url}/api/v1/forget",
            json=payload,
        ) as resp:
            if resp.status >= 400:
                body = await resp.text()
                raise RuntimeError(f"Remote forget failed ({resp.status}): {body}")
            return await resp.json()