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from io import BytesIO

import torch

from internals.data.dataAccessor import update_db
from internals.data.task import ModelType, Task, TaskType
from internals.pipelines.inpainter import InPainter
from internals.pipelines.object_remove import ObjectRemoval
from internals.pipelines.prompt_modifier import PromptModifier
from internals.pipelines.remove_background import RemoveBackground, RemoveBackgroundV2
from internals.pipelines.replace_background import ReplaceBackground
from internals.pipelines.safety_checker import SafetyChecker
from internals.pipelines.upscaler import Upscaler
from internals.util.avatar import Avatar
from internals.util.cache import auto_clear_cuda_and_gc, clear_cuda
from internals.util.commons import construct_default_s3_url, upload_image, upload_images
from internals.util.config import (
    num_return_sequences,
    set_configs_from_task,
    set_root_dir,
)
from internals.util.failure_hander import FailureHandler
from internals.util.slack import Slack

torch.backends.cudnn.benchmark = True
torch.backends.cuda.matmul.allow_tf32 = True

auto_mode = False

slack = Slack()

prompt_modifier = PromptModifier(num_of_sequences=num_return_sequences)
upscaler = Upscaler()
inpainter = InPainter()
safety_checker = SafetyChecker()
object_removal = ObjectRemoval()
remove_background_v2 = RemoveBackgroundV2()
avatar = Avatar()
replace_background = ReplaceBackground()


@update_db
@slack.auto_send_alert
def remove_bg(task: Task):
    remove_background = RemoveBackground()
    output_image = remove_background.remove(task.get_imageUrl())

    output_key = "crecoAI/{}_rmbg.png".format(task.get_taskId())
    upload_image(output_image, output_key)

    return {"generated_image_url": construct_default_s3_url(output_key)}


@update_db
@slack.auto_send_alert
def inpaint(task: Task):
    prompt = avatar.add_code_names(task.get_prompt())
    if task.is_prompt_engineering():
        prompt = prompt_modifier.modify(prompt)
    else:
        prompt = [prompt] * num_return_sequences

    print({"prompts": prompt})

    images = inpainter.process(
        prompt=prompt,
        image_url=task.get_imageUrl(),
        mask_image_url=task.get_maskImageUrl(),
        width=task.get_width(),
        height=task.get_height(),
        seed=task.get_seed(),
        negative_prompt=[task.get_negative_prompt()] * num_return_sequences,
    )
    generated_image_urls = upload_images(images, "_inpaint", task.get_taskId())

    clear_cuda()

    return {"modified_prompts": prompt, "generated_image_urls": generated_image_urls}


@update_db
@slack.auto_send_alert
def remove_object(task: Task):
    output_key = "crecoAI/{}_object_remove.png".format(task.get_taskId())

    images = object_removal.process(
        image_url=task.get_imageUrl(),
        mask_image_url=task.get_maskImageUrl(),
        seed=task.get_seed(),
        width=task.get_width(),
        height=task.get_height(),
    )
    generated_image_urls = upload_image(images[0], output_key)

    clear_cuda()

    return {"generated_image_urls": generated_image_urls}


@update_db
@slack.auto_send_alert
def replace_bg(task: Task):
    prompt = task.get_prompt()
    if task.is_prompt_engineering():
        prompt = prompt_modifier.modify(prompt)
    else:
        prompt = [prompt] * num_return_sequences

    images, has_nsfw = replace_background.replace(
        image=task.get_imageUrl(),
        prompt=prompt,
        negative_prompt=[task.get_negative_prompt()] * num_return_sequences,
        seed=task.get_seed(),
        width=task.get_width(),
        height=task.get_height(),
        steps=task.get_steps(),
        resize_dimension=task.get_resize_dimension(),
        product_scale_width=task.get_image_scale(),
    )

    generated_image_urls = upload_images(images, "_replace_bg", task.get_taskId())

    return {
        "modified_prompts": prompt,
        "generated_image_urls": generated_image_urls,
        "has_nsfw": has_nsfw,
    }


@update_db
@slack.auto_send_alert
def upscale_image(task: Task):
    output_key = "crecoAI/{}_upscale.png".format(task.get_taskId())
    out_img = None
    if task.get_modelType() == ModelType.ANIME:
        print("Using Anime model")
        out_img = upscaler.upscale_anime(
            image=task.get_imageUrl(), resize_dimension=task.get_resize_dimension()
        )
    else:
        print("Using Real model")
        out_img = upscaler.upscale(
            image=task.get_imageUrl(), resize_dimension=task.get_resize_dimension()
        )

    upload_image(BytesIO(out_img), output_key)
    return {"generated_image_url": construct_default_s3_url(output_key)}


def model_fn(model_dir):
    print("Logs: model loaded .... starts")

    set_root_dir(__file__)

    FailureHandler.register()

    avatar.load_local(model_dir)

    prompt_modifier.load()
    safety_checker.load()

    object_removal.load(model_dir)
    upscaler.load()
    inpainter.load()

    replace_background.load(upscaler, remove_background_v2)

    safety_checker.apply(inpainter)

    print("Logs: model loaded ....")
    return


@FailureHandler.clear
def predict_fn(data, pipe):
    task = Task(data)
    print("task is ", data)

    FailureHandler.handle(task)

    # Set set_environment
    set_configs_from_task(task)

    try:
        # Set set_environment
        set_configs_from_task(task)

        # Fetch avatars
        avatar.fetch_from_network(task.get_model_id())

        task_type = task.get_type()

        if task_type == TaskType.REMOVE_BG:
            return remove_bg(task)
        elif task_type == TaskType.INPAINT:
            return inpaint(task)
        elif task_type == TaskType.UPSCALE_IMAGE:
            return upscale_image(task)
        elif task_type == TaskType.OBJECT_REMOVAL:
            return remove_object(task)
        elif task_type == TaskType.REPLACE_BG:
            return replace_bg(task)
        else:
            raise Exception("Invalid task type")
    except Exception as e:
        print(f"Error: {e}")
        slack.error_alert(task, e)
        return None