# Copyright (c) 2022 Kyle Schouviller (https://github.com/kyle0654)

from datetime import datetime, timezone
import uuid

from fastapi import Path, Query, Request, UploadFile
from fastapi.responses import FileResponse, Response
from fastapi.routing import APIRouter
from PIL import Image
from invokeai.app.api.models.images import ImageResponse
from invokeai.app.services.item_storage import PaginatedResults

from ...services.image_storage import ImageType
from ..dependencies import ApiDependencies

images_router = APIRouter(prefix="/v1/images", tags=["images"])

@images_router.get("/{image_type}/{image_name}", operation_id="get_image")
async def get_image(
    image_type: ImageType = Path(description="The type of image to get"),
    image_name: str = Path(description="The name of the image to get"),
):
    """Gets a result"""
    # TODO: This is not really secure at all. At least make sure only output results are served
    filename = ApiDependencies.invoker.services.images.get_path(image_type, image_name)
    return FileResponse(filename)

@images_router.get("/{image_type}/thumbnails/{image_name}", operation_id="get_thumbnail")
async def get_thumbnail(
    image_type: ImageType = Path(description="The type of image to get"),
    image_name: str = Path(description="The name of the image to get"),
):
    """Gets a thumbnail"""
    # TODO: This is not really secure at all. At least make sure only output results are served
    filename = ApiDependencies.invoker.services.images.get_path(image_type, 'thumbnails/' + image_name)
    return FileResponse(filename)


@images_router.post(
    "/uploads/",
    operation_id="upload_image",
    responses={
        201: {"description": "The image was uploaded successfully"},
        404: {"description": "Session not found"},
    },
)
async def upload_image(file: UploadFile, request: Request):
    if not file.content_type.startswith("image"):
        return Response(status_code=415)

    contents = await file.read()
    try:
        im = Image.open(contents)
    except:
        # Error opening the image
        return Response(status_code=415)

    filename = f"{uuid.uuid4()}_{str(int(datetime.now(timezone.utc).timestamp()))}.png"
    ApiDependencies.invoker.services.images.save(ImageType.UPLOAD, filename, im)

    return Response(
        status_code=201,
        headers={
            "Location": request.url_for(
                "get_image", image_type=ImageType.UPLOAD.value, image_name=filename
            )
        },
    )

@images_router.get(
    "/",
    operation_id="list_images",
    responses={200: {"model": PaginatedResults[ImageResponse]}},
)
async def list_images(
    image_type: ImageType = Query(default=ImageType.RESULT, description="The type of images to get"),
    page: int = Query(default=0, description="The page of images to get"),
    per_page: int = Query(default=10, description="The number of images per page"),
) -> PaginatedResults[ImageResponse]:
    """Gets a list of images"""
    result = ApiDependencies.invoker.services.images.list(
        image_type, page, per_page
    )
    return result