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from fastapi import File, Path, Response, UploadFile
from fastapi.responses import FileResponse
from fastapi import APIRouter, HTTPException, Query
from pydantic import BaseModel, Field, field_validator
from typing import List, Optional
from uuid import UUID

from src.config import logger
from src.services import SOWService
from datetime import datetime

# from src.models import SOW


class SOW(BaseModel):
    id: UUID
    # rfp_id: UUID
    requirement: Optional[str] = None
    additional_info: Optional[str] = None
    sow_generated_text: Optional[str] = None
    created_at: datetime
    updated_at: datetime


class ResponseSOW(BaseModel):
    status: str
    data: Optional[List[SOW]]


class ResponseSOWSingle(BaseModel):
    status: str
    data: SOW


class SOWRequest(BaseModel):
    requirement: Optional[str] = None
    additional_info: Optional[str] = None
    sow_generated_text: Optional[str] = None


class SOWUpdateRequest(BaseModel):
    requirement: Optional[str] = None
    additional_info: Optional[str] = None
    sow_generated_text: Optional[str] = None


class DeleteResponse(BaseModel):
    status: str


class SOWController:
    def __init__(self):
        self.__sow_service = SOWService
        self.router = APIRouter()
        self.router.add_api_route(
            "/sows",
            self.get_sows,
            methods=["GET"],
            response_model=ResponseSOW,
            tags=["SOWs"],
        )
        self.router.add_api_route(
            "/sows/{sow_id}",
            self.get_sows_by_id,
            methods=["GET"],
            response_model=ResponseSOWSingle,
            tags=["SOWs by SOW ID"],
        )
        self.router.add_api_route(
            "/sows",
            self.create_sow,
            methods=["POST"],
            response_model=ResponseSOWSingle,
            tags=["SOWs"],
        )
        self.router.add_api_route(
            "/sows/{sow_id}",
            self.update_sow,
            methods=["PATCH"],
            response_model=ResponseSOWSingle,
            tags=["SOWs by SOW ID"],
        )
        self.router.add_api_route(
            "/sows/{sow_id}",
            self.delete_sow,
            methods=["DELETE"],
            response_model=DeleteResponse,
            tags=["SOWs by SOW ID"],
        )

        self.router.add_api_route(
            "/sows/{sow_id}/generate",
            self.generate_sow,
            methods=["GET"],
            response_model=ResponseSOWSingle,
            tags=["Generate SOW"],
        )

        self.router.add_api_route(
            "/sows/{sow_id}/download",
            self.download_sow,
            methods=["GET"],
            response_model=None,
            tags=["Download SOW"],
            response_class=FileResponse,
        )

        self.router.add_api_route(
            "/sows/upload",
            self.upload_sow,
            methods=["POST"],
            response_model=ResponseSOWSingle,
            tags=["Upload Requirement File"],
        )
        # self.router.add_api_route(
        #     "/sows/{sow_id}/upload",
        #     self.upload_sow_by_id,
        #     methods=["POST"],
        #     response_model=ResponseSOWSingle,
        #     tags=["Upload Requirement File"],
        # )

    async def get_sows(self):
        async with self.__sow_service() as service:
            try:
                sows = await service.get_sows()
                return ResponseSOW(status="success", data=[SOW(**sow) for sow in sows])
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to retrieve SOWs.")

    async def get_sows_by_id(self, sow_id: UUID = Path(...)):
        async with self.__sow_service() as service:
            try:
                sows = await service.get_sows(sow_id=sow_id)
                sow = sows[0]
                return ResponseSOWSingle(status="success", data=SOW(**sow))
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to retrieve SOWs.")

    async def create_sow(self, sow: SOWRequest):
        async with self.__sow_service() as service:
            try:
                sow = await service.create_sow(
                    sow=sow.model_dump(mode="json", exclude_unset=True)
                )
                return ResponseSOWSingle(status="success", data=SOW(**sow))
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to create SOW.")

    async def update_sow(self, sow: SOWUpdateRequest, sow_id: UUID = Path(...)):
        async with self.__sow_service() as service:
            try:
                sow = await service.update_sow(
                    sow_id=sow_id,
                    sow=sow.model_dump(mode="json", exclude_unset=True),
                )
                return ResponseSOWSingle(status="success", data=SOW(**sow))
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to update SOW.")

    async def delete_sow(self, sow_id: UUID = Path(...)):
        async with self.__sow_service() as service:
            try:
                status = await service.delete_sow(sow_id=sow_id)
                if not status:
                    raise HTTPException(status_code=404, detail="SOW not found.")
                return DeleteResponse(status="success")
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to delete SOW.")

    async def generate_sow(self, sow_id: UUID = Path(...)):
        async with self.__sow_service() as service:
            try:
                sow = await service.generate_sow(sow_id=sow_id)
                return ResponseSOWSingle(status="success", data=SOW(**sow))
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to generate SOW.")

    async def download_sow(self, sow_id: UUID = Path(...)):
        async with self.__sow_service() as service:
            try:
                file = await service.download_sow(sow_id=sow_id)
                return Response(
                    content=file,
                    media_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document",
                )
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to download SOW.")

    async def upload_sow(
        self,
        files: List[UploadFile] = File(...),
    ):
        async with self.__sow_service() as service:
            try:
                data = await service.upload_sow(files=files)
                return ResponseSOWSingle(status="success", data=SOW(**data))
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to upload SOW.")

    async def upload_sow_by_id(
        self,
        sow_id: UUID = Path(...),
        files: List[UploadFile] = File(...),
    ):
        async with self.__sow_service() as service:
            try:
                data = await service.upload_sow(files=files, id=sow_id)
                return ResponseSOWSingle(status="success", data=SOW(**data))
            except HTTPException as e:
                logger.warning(e)
                raise e
            except Exception as e:
                logger.exception(e)
                raise HTTPException(status_code=500, detail="Failed to upload SOW.")