import base64
from io import BytesIO
from typing import Annotated, Union

from fastapi import APIRouter, Depends, UploadFile
from sqlalchemy.ext.asyncio import AsyncSession
from starlette.responses import StreamingResponse
from fastapi.responses import FileResponse
import utils.dependecies
from backend.session import get_session
from schemas.barcode import GetProductBarcodeResponse, GetProductBarcodeRequest, GetProductBarcodePdfResponse, \
    GetProductBarcodePdfRequest
from schemas.base import PaginationSchema
from schemas.product import *
from services.auth import get_current_user
from services.barcode import BarcodeService
from services.product import ProductService

product_router = APIRouter(
    prefix="/product",
    tags=["product"],
    # dependencies=[Depends(get_current_user)]
)


@product_router.post(
    '/create',
    response_model=ProductCreateResponse,
    operation_id='create_product'
)
async def create_product(
        request: ProductCreateRequest,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).create(request)


@product_router.post(
    '/delete',
    response_model=ProductDeleteResponse,
    operation_id='delete_product'
)
async def delete_product(
        request: ProductDeleteRequest,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).delete(request)


@product_router.post(
    '/update',
    response_model=ProductUpdateResponse,
    operation_id='update_product'
)
async def delete_product(
        request: ProductUpdateRequest,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).update(request)


@product_router.get(
    '/get',
    response_model=ProductGetResponse,
    operation_id='get_products_by_client_id'
)
async def get_product(
        client_id: int,
        pagination: Annotated[PaginationSchema, Depends(utils.dependecies.pagination_parameters)],
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).get_by_client_id(client_id, pagination)


@product_router.get('/get-by-id',
                    response_model=ProductSchema,
                    operation_id='get_product_by_id')
async def get_product_by_id(
        product_id: int,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).get_by_id(product_id)


@product_router.post(
    '/barcode/add',
    response_model=ProductAddBarcodeResponse,
    operation_id='add_product_barcode'
)
async def add_product_barcode(
        request: ProductAddBarcodeRequest,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).add_barcode(request)


@product_router.get(
    '/barcode/exists',
    response_model=ProductExistsBarcodeResponse,
    operation_id='exists_product_barcode'
)
async def exists_product_barcode(
        product_id: int,
        barcode: str,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).exists_barcode(product_id, barcode)


@product_router.post(
    '/barcode/generate',
    response_model=ProductGenerateBarcodeResponse,
    operation_id='generate_product_barcode'
)
async def generate_product_barcode(
        request: ProductGenerateBarcodeRequest,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await ProductService(session).generate_barcode(request)


@product_router.post(
    '/barcode/get',
    response_model=GetProductBarcodeResponse,
    operation_id='get_product_barcode'
)
async def get_product_barcode(
        request: GetProductBarcodeRequest,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    return await BarcodeService(session).get_barcode(request)


@product_router.post(
    '/barcode/get-pdf',
    operation_id='get_product_barcode_pdf',
    response_model=GetProductBarcodePdfResponse
)
async def get_product_barcode_pdf(
        request: GetProductBarcodePdfRequest,
        session: Annotated[AsyncSession, Depends(get_session)]
):
    filename, pdf_buffer = await BarcodeService(session).get_barcode_pdf(request)
    pdf_buffer: BytesIO
    base64_string = base64.b64encode(pdf_buffer.read()).decode('utf-8')
    return GetProductBarcodePdfResponse(
        base64_string=base64_string,
        filename=filename,
        mime_type='application/pdf'
    )
    # return StreamingResponse(content=pdf_buffer,
    #                          media_type='application/pdf',
    #                          headers={"Content-Disposition": f"inline; filename={filename}"})


@product_router.post(
    '/images/upload/{product_id}',
    response_model=ProductUploadImageResponse,
    operation_id='upload_product_image'
)
async def upload_product_image(
        product_id: int,
        upload_file: UploadFile,
        session: Annotated[AsyncSession, Depends(get_session)]

):
    file_bytes = upload_file.file.read()
    return await ProductService(session).upload_image(product_id, file_bytes)