from fastapi import (
    Depends,
    FastAPI,
    File,
    Form,
    HTTPException,
    Request,
    UploadFile,
    status,
    APIRouter,
)
import os
import logging
import shutil
import requests
from pydantic import BaseModel
from starlette.responses import FileResponse
from typing import Optional

from open_webui.env import SRC_LOG_LEVELS
from open_webui.config import CACHE_DIR
from open_webui.constants import ERROR_MESSAGES


from open_webui.routers.openai import get_all_models_responses

from open_webui.utils.auth import get_admin_user

log = logging.getLogger(__name__)
log.setLevel(SRC_LOG_LEVELS["MAIN"])


##################################
#
# Pipelines Endpoints
#
##################################

router = APIRouter()


@router.get("/api/pipelines/list")
async def get_pipelines_list(request: Request, user=Depends(get_admin_user)):
    responses = await get_all_models_responses(request)
    log.debug(f"get_pipelines_list: get_openai_models_responses returned {responses}")

    urlIdxs = [
        idx
        for idx, response in enumerate(responses)
        if response is not None and "pipelines" in response
    ]

    return {
        "data": [
            {
                "url": request.app.state.config.OPENAI_API_BASE_URLS[urlIdx],
                "idx": urlIdx,
            }
            for urlIdx in urlIdxs
        ]
    }


@router.post("/api/pipelines/upload")
async def upload_pipeline(
    request: Request,
    urlIdx: int = Form(...),
    file: UploadFile = File(...),
    user=Depends(get_admin_user),
):
    print("upload_pipeline", urlIdx, file.filename)
    # Check if the uploaded file is a python file
    if not (file.filename and file.filename.endswith(".py")):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Only Python (.py) files are allowed.",
        )

    upload_folder = f"{CACHE_DIR}/pipelines"
    os.makedirs(upload_folder, exist_ok=True)
    file_path = os.path.join(upload_folder, file.filename)

    r = None
    try:
        # Save the uploaded file
        with open(file_path, "wb") as buffer:
            shutil.copyfileobj(file.file, buffer)

        url = request.app.state.config.OPENAI_API_BASE_URLS[urlIdx]
        key = request.app.state.config.OPENAI_API_KEYS[urlIdx]

        with open(file_path, "rb") as f:
            files = {"file": f}
            r = requests.post(
                f"{url}/pipelines/upload",
                headers={"Authorization": f"Bearer {key}"},
                files=files,
            )

        r.raise_for_status()
        data = r.json()

        return {**data}
    except Exception as e:
        # Handle connection error here
        print(f"Connection error: {e}")

        detail = None
        status_code = status.HTTP_404_NOT_FOUND
        if r is not None:
            status_code = r.status_code
            try:
                res = r.json()
                if "detail" in res:
                    detail = res["detail"]
            except Exception:
                pass

        raise HTTPException(
            status_code=status_code,
            detail=detail if detail else "Pipeline not found",
        )
    finally:
        # Ensure the file is deleted after the upload is completed or on failure
        if os.path.exists(file_path):
            os.remove(file_path)


class AddPipelineForm(BaseModel):
    url: str
    urlIdx: int


@router.post("/api/pipelines/add")
async def add_pipeline(
    request: Request, form_data: AddPipelineForm, user=Depends(get_admin_user)
):
    r = None
    try:
        urlIdx = form_data.urlIdx

        url = request.app.state.config.OPENAI_API_BASE_URLS[urlIdx]
        key = request.app.state.config.OPENAI_API_KEYS[urlIdx]

        r = requests.post(
            f"{url}/pipelines/add",
            headers={"Authorization": f"Bearer {key}"},
            json={"url": form_data.url},
        )

        r.raise_for_status()
        data = r.json()

        return {**data}
    except Exception as e:
        # Handle connection error here
        print(f"Connection error: {e}")

        detail = None
        if r is not None:
            try:
                res = r.json()
                if "detail" in res:
                    detail = res["detail"]
            except Exception:
                pass

        raise HTTPException(
            status_code=(r.status_code if r is not None else status.HTTP_404_NOT_FOUND),
            detail=detail if detail else "Pipeline not found",
        )


class DeletePipelineForm(BaseModel):
    id: str
    urlIdx: int


@router.delete("/api/pipelines/delete")
async def delete_pipeline(
    request: Request, form_data: DeletePipelineForm, user=Depends(get_admin_user)
):
    r = None
    try:
        urlIdx = form_data.urlIdx

        url = request.app.state.config.OPENAI_API_BASE_URLS[urlIdx]
        key = request.app.state.config.OPENAI_API_KEYS[urlIdx]

        r = requests.delete(
            f"{url}/pipelines/delete",
            headers={"Authorization": f"Bearer {key}"},
            json={"id": form_data.id},
        )

        r.raise_for_status()
        data = r.json()

        return {**data}
    except Exception as e:
        # Handle connection error here
        print(f"Connection error: {e}")

        detail = None
        if r is not None:
            try:
                res = r.json()
                if "detail" in res:
                    detail = res["detail"]
            except Exception:
                pass

        raise HTTPException(
            status_code=(r.status_code if r is not None else status.HTTP_404_NOT_FOUND),
            detail=detail if detail else "Pipeline not found",
        )


@router.get("/api/pipelines")
async def get_pipelines(
    request: Request, urlIdx: Optional[int] = None, user=Depends(get_admin_user)
):
    r = None
    try:
        url = request.app.state.config.OPENAI_API_BASE_URLS[urlIdx]
        key = request.app.state.config.OPENAI_API_KEYS[urlIdx]

        r = requests.get(f"{url}/pipelines", headers={"Authorization": f"Bearer {key}"})

        r.raise_for_status()
        data = r.json()

        return {**data}
    except Exception as e:
        # Handle connection error here
        print(f"Connection error: {e}")

        detail = None
        if r is not None:
            try:
                res = r.json()
                if "detail" in res:
                    detail = res["detail"]
            except Exception:
                pass

        raise HTTPException(
            status_code=(r.status_code if r is not None else status.HTTP_404_NOT_FOUND),
            detail=detail if detail else "Pipeline not found",
        )


@router.get("/api/pipelines/{pipeline_id}/valves")
async def get_pipeline_valves(
    request: Request,
    urlIdx: Optional[int],
    pipeline_id: str,
    user=Depends(get_admin_user),
):
    r = None
    try:
        url = request.app.state.config.OPENAI_API_BASE_URLS[urlIdx]
        key = request.app.state.config.OPENAI_API_KEYS[urlIdx]

        r = requests.get(
            f"{url}/{pipeline_id}/valves", headers={"Authorization": f"Bearer {key}"}
        )

        r.raise_for_status()
        data = r.json()

        return {**data}
    except Exception as e:
        # Handle connection error here
        print(f"Connection error: {e}")

        detail = None
        if r is not None:
            try:
                res = r.json()
                if "detail" in res:
                    detail = res["detail"]
            except Exception:
                pass

        raise HTTPException(
            status_code=(r.status_code if r is not None else status.HTTP_404_NOT_FOUND),
            detail=detail if detail else "Pipeline not found",
        )


@router.get("/api/pipelines/{pipeline_id}/valves/spec")
async def get_pipeline_valves_spec(
    request: Request,
    urlIdx: Optional[int],
    pipeline_id: str,
    user=Depends(get_admin_user),
):
    r = None
    try:
        url = request.app.state.config.OPENAI_API_BASE_URLS[urlIdx]
        key = request.app.state.config.OPENAI_API_KEYS[urlIdx]

        r = requests.get(
            f"{url}/{pipeline_id}/valves/spec",
            headers={"Authorization": f"Bearer {key}"},
        )

        r.raise_for_status()
        data = r.json()

        return {**data}
    except Exception as e:
        # Handle connection error here
        print(f"Connection error: {e}")

        detail = None
        if r is not None:
            try:
                res = r.json()
                if "detail" in res:
                    detail = res["detail"]
            except Exception:
                pass

        raise HTTPException(
            status_code=(r.status_code if r is not None else status.HTTP_404_NOT_FOUND),
            detail=detail if detail else "Pipeline not found",
        )


@router.post("/api/pipelines/{pipeline_id}/valves/update")
async def update_pipeline_valves(
    request: Request,
    urlIdx: Optional[int],
    pipeline_id: str,
    form_data: dict,
    user=Depends(get_admin_user),
):
    r = None
    try:
        url = request.app.state.config.OPENAI_API_BASE_URLS[urlIdx]
        key = request.app.state.config.OPENAI_API_KEYS[urlIdx]

        r = requests.post(
            f"{url}/{pipeline_id}/valves/update",
            headers={"Authorization": f"Bearer {key}"},
            json={**form_data},
        )

        r.raise_for_status()
        data = r.json()

        return {**data}
    except Exception as e:
        # Handle connection error here
        print(f"Connection error: {e}")

        detail = None

        if r is not None:
            try:
                res = r.json()
                if "detail" in res:
                    detail = res["detail"]
            except Exception:
                pass

        raise HTTPException(
            status_code=(r.status_code if r is not None else status.HTTP_404_NOT_FOUND),
            detail=detail if detail else "Pipeline not found",
        )