app.py

import requests
from bs4 import BeautifulSoup
from abc import ABC, abstractmethod
from pathlib import Path
from langdetect import detect as get_language
from typing import Any, Dict, List, Optional, Union
from collections import namedtuple
from inspect import signature
import os
import subprocess
import logging
import re
import random
from string import ascii_letters, digits, punctuation
import requests
import sys
import warnings
import time
import math
from pathlib import Path
from dataclasses import dataclass
from typing import Any
import pillow_heif
import spaces
import numpy as np
import numpy.typing as npt
import torch
from torch import nn
import gradio as gr
from lxml.html import fromstring
from huggingface_hub import hf_hub_download
from safetensors.torch import load_file, save_file
from diffusers import DiffusionPipeline
from PIL import Image, ImageDraw, ImageFont
from transformers import pipeline, T5ForConditionalGeneration, T5Tokenizer
from refiners.fluxion.utils import manual_seed
from refiners.foundationals.latent_diffusion import Solver, solvers
from refiners.foundationals.latent_diffusion.stable_diffusion_1.multi_upscaler import (
    MultiUpscaler,
    UpscalerCheckpoints,
)
from datetime import datetime

model = T5ForConditionalGeneration.from_pretrained("t5-large")
tokenizer = T5Tokenizer.from_pretrained("t5-large")

def log(msg):
    print(f'{datetime.now().time()} {msg}')

Tile = tuple[int, int, Image.Image]
Tiles = list[tuple[int, int, list[Tile]]]

def conv_block(in_nc: int, out_nc: int) -> nn.Sequential:
    return nn.Sequential(
        nn.Conv2d(in_nc, out_nc, kernel_size=3, padding=1),
        nn.LeakyReLU(negative_slope=0.2, inplace=True),
    )

class ResidualDenseBlock_5C(nn.Module):
    """
    Residual Dense Block
    The core module of paper: (Residual Dense Network for Image Super-Resolution, CVPR 18)
    Modified options that can be used:
        - "Partial Convolution based Padding" arXiv:1811.11718
        - "Spectral normalization" arXiv:1802.05957
        - "ICASSP 2020 - ESRGAN+ : Further Improving ESRGAN" N. C.
            {Rakotonirina} and A. {Rasoanaivo}
    """

    def __init__(self, nf: int = 64, gc: int = 32) -> None:
        super().__init__()  # type: ignore[reportUnknownMemberType]

        self.conv1 = conv_block(nf, gc)
        self.conv2 = conv_block(nf + gc, gc)
        self.conv3 = conv_block(nf + 2 * gc, gc)
        self.conv4 = conv_block(nf + 3 * gc, gc)
        # Wrapped in Sequential because of key in state dict.
        self.conv5 = nn.Sequential(nn.Conv2d(nf + 4 * gc, nf, kernel_size=3, padding=1))

    def forward(self, x: torch.Tensor) -> torch.Tensor:
        x1 = self.conv1(x)
        x2 = self.conv2(torch.cat((x, x1), 1))
        x3 = self.conv3(torch.cat((x, x1, x2), 1))
        x4 = self.conv4(torch.cat((x, x1, x2, x3), 1))
        x5 = self.conv5(torch.cat((x, x1, x2, x3, x4), 1))
        return x5 * 0.2 + x


class RRDB(nn.Module):
    """
    Residual in Residual Dense Block
    (ESRGAN: Enhanced Super-Resolution Generative Adversarial Networks)
    """

    def __init__(self, nf: int) -> None:
        super().__init__()  # type: ignore[reportUnknownMemberType]
        self.RDB1 = ResidualDenseBlock_5C(nf)
        self.RDB2 = ResidualDenseBlock_5C(nf)
        self.RDB3 = ResidualDenseBlock_5C(nf)

    def forward(self, x: torch.Tensor) -> torch.Tensor:
        out = self.RDB1(x)
        out = self.RDB2(out)
        out = self.RDB3(out)
        return out * 0.2 + x


class Upsample2x(nn.Module):
    """Upsample 2x."""

    def __init__(self) -> None:
        super().__init__()  # type: ignore[reportUnknownMemberType]

    def forward(self, x: torch.Tensor) -> torch.Tensor:
        return nn.functional.interpolate(x, scale_factor=2.0)  # type: ignore


class ShortcutBlock(nn.Module):
    """Elementwise sum the output of a submodule to its input"""

    def __init__(self, submodule: nn.Module) -> None:
        super().__init__()  # type: ignore[reportUnknownMemberType]
        self.sub = submodule

    def forward(self, x: torch.Tensor) -> torch.Tensor:
        return x + self.sub(x)


class RRDBNet(nn.Module):
    def __init__(self, in_nc: int, out_nc: int, nf: int, nb: int) -> None:
        super().__init__()  # type: ignore[reportUnknownMemberType]
        assert in_nc % 4 != 0  # in_nc is 3

        self.model = nn.Sequential(
            nn.Conv2d(in_nc, nf, kernel_size=3, padding=1),
            ShortcutBlock(
                nn.Sequential(
                    *(RRDB(nf) for _ in range(nb)),
                    nn.Conv2d(nf, nf, kernel_size=3, padding=1),
                )
            ),
            Upsample2x(),
            nn.Conv2d(nf, nf, kernel_size=3, padding=1),
            nn.LeakyReLU(negative_slope=0.2, inplace=True),
            Upsample2x(),
            nn.Conv2d(nf, nf, kernel_size=3, padding=1),
            nn.LeakyReLU(negative_slope=0.2, inplace=True),
            nn.Conv2d(nf, nf, kernel_size=3, padding=1),
            nn.LeakyReLU(negative_slope=0.2, inplace=True),
            nn.Conv2d(nf, out_nc, kernel_size=3, padding=1),
        )

    def forward(self, x: torch.Tensor) -> torch.Tensor:
        return self.model(x)


def infer_params(state_dict: dict[str, torch.Tensor]) -> tuple[int, int, int, int, int]:
    # this code is adapted from https://github.com/victorca25/iNNfer
    scale2x = 0
    scalemin = 6
    n_uplayer = 0
    out_nc = 0
    nb = 0

    for block in list(state_dict):
        parts = block.split(".")
        n_parts = len(parts)
        if n_parts == 5 and parts[2] == "sub":
            nb = int(parts[3])
        elif n_parts == 3:
            part_num = int(parts[1])
            if part_num > scalemin and parts[0] == "model" and parts[2] == "weight":
                scale2x += 1
            if part_num > n_uplayer:
                n_uplayer = part_num
                out_nc = state_dict[block].shape[0]
        assert "conv1x1" not in block  # no ESRGANPlus

    nf = state_dict["model.0.weight"].shape[0]
    in_nc = state_dict["model.0.weight"].shape[1]
    scale = 2**scale2x

    assert out_nc > 0
    assert nb > 0

    return in_nc, out_nc, nf, nb, scale  # 3, 3, 64, 23, 4

# https://github.com/philz1337x/clarity-upscaler/blob/e0cd797198d1e0e745400c04d8d1b98ae508c73b/modules/images.py#L64
Grid = namedtuple("Grid", ["tiles", "tile_w", "tile_h", "image_w", "image_h", "overlap"])

# adapted from https://github.com/philz1337x/clarity-upscaler/blob/e0cd797198d1e0e745400c04d8d1b98ae508c73b/modules/images.py#L67
def split_grid(image: Image.Image, tile_w: int = 512, tile_h: int = 512, overlap: int = 64) -> Grid:
    w = image.width
    h = image.height

    non_overlap_width = tile_w - overlap
    non_overlap_height = tile_h - overlap

    cols = max(1, math.ceil((w - overlap) / non_overlap_width))
    rows = max(1, math.ceil((h - overlap) / non_overlap_height))

    dx = (w - tile_w) / (cols - 1) if cols > 1 else 0
    dy = (h - tile_h) / (rows - 1) if rows > 1 else 0

    grid = Grid([], tile_w, tile_h, w, h, overlap)
    for row in range(rows):
        row_images: list[Tile] = []
        y1 = max(min(int(row * dy), h - tile_h), 0)
        y2 = min(y1 + tile_h, h)
        for col in range(cols):
            x1 = max(min(int(col * dx), w - tile_w), 0)
            x2 = min(x1 + tile_w, w)
            tile = image.crop((x1, y1, x2, y2))
            row_images.append((x1, tile_w, tile))
        grid.tiles.append((y1, tile_h, row_images))

    return grid


# https://github.com/philz1337x/clarity-upscaler/blob/e0cd797198d1e0e745400c04d8d1b98ae508c73b/modules/images.py#L104
def combine_grid(grid: Grid):
    def make_mask_image(r: npt.NDArray[np.float32]) -> Image.Image:
        r = r * 255 / grid.overlap
        return Image.fromarray(r.astype(np.uint8), "L")

    mask_w = make_mask_image(
        np.arange(grid.overlap, dtype=np.float32).reshape((1, grid.overlap)).repeat(grid.tile_h, axis=0)
    )
    mask_h = make_mask_image(
        np.arange(grid.overlap, dtype=np.float32).reshape((grid.overlap, 1)).repeat(grid.image_w, axis=1)
    )

    combined_image = Image.new("RGB", (grid.image_w, grid.image_h))
    for y, h, row in grid.tiles:
        combined_row = Image.new("RGB", (grid.image_w, h))
        for x, w, tile in row:
            if x == 0:
                combined_row.paste(tile, (0, 0))
                continue

            combined_row.paste(tile.crop((0, 0, grid.overlap, h)), (x, 0), mask=mask_w)
            combined_row.paste(tile.crop((grid.overlap, 0, w, h)), (x + grid.overlap, 0))

        if y == 0:
            combined_image.paste(combined_row, (0, 0))
            continue

        combined_image.paste(
            combined_row.crop((0, 0, combined_row.width, grid.overlap)),
            (0, y),
            mask=mask_h,
        )
        combined_image.paste(
            combined_row.crop((0, grid.overlap, combined_row.width, h)),
            (0, y + grid.overlap),
        )

    return combined_image


class UpscalerESRGAN:
    def __init__(self, model_path: Path, device: torch.device, dtype: torch.dtype):
        self.model_path = model_path
        self.device = device
        self.model = self.load_model(model_path)
        self.to(device, dtype)

    def __call__(self, img: Image.Image) -> Image.Image:
        return self.upscale_without_tiling(img)

    def to(self, device: torch.device, dtype: torch.dtype):
        self.device = device
        self.dtype = dtype
        self.model.to(device=device, dtype=dtype)

    def load_model(self, path: Path) -> RRDBNet:
        filename = path
        state_dict: dict[str, torch.Tensor] = torch.load(filename, weights_only=True, map_location=self.device)  # type: ignore
        in_nc, out_nc, nf, nb, upscale = infer_params(state_dict)
        assert upscale == 4, "Only 4x upscaling is supported"
        model = RRDBNet(in_nc=in_nc, out_nc=out_nc, nf=nf, nb=nb)
        model.load_state_dict(state_dict)
        model.eval()

        return model

    def upscale_without_tiling(self, img: Image.Image) -> Image.Image:
        img_np = np.array(img)
        img_np = img_np[:, :, ::-1]
        img_np = np.ascontiguousarray(np.transpose(img_np, (2, 0, 1))) / 255
        img_t = torch.from_numpy(img_np).float()  # type: ignore
        img_t = img_t.unsqueeze(0).to(device=self.device, dtype=self.dtype)
        with torch.no_grad():
            output = self.model(img_t)
        output = output.squeeze().float().cpu().clamp_(0, 1).numpy()
        output = 255.0 * np.moveaxis(output, 0, 2)
        output = output.astype(np.uint8)
        output = output[:, :, ::-1]
        return Image.fromarray(output, "RGB")

    # https://github.com/philz1337x/clarity-upscaler/blob/e0cd797198d1e0e745400c04d8d1b98ae508c73b/modules/esrgan_model.py#L208
    def upscale_with_tiling(self, img: Image.Image) -> Image.Image:
        img = img.convert("RGB")
        grid = split_grid(img)
        newtiles: Tiles = []
        scale_factor: int = 1

        for y, h, row in grid.tiles:
            newrow: list[Tile] = []
            for tiledata in row:
                x, w, tile = tiledata
                output = self.upscale_without_tiling(tile)
                scale_factor = output.width // tile.width
                newrow.append((x * scale_factor, w * scale_factor, output))
            newtiles.append((y * scale_factor, h * scale_factor, newrow))

        newgrid = Grid(
            newtiles,
            grid.tile_w * scale_factor,
            grid.tile_h * scale_factor,
            grid.image_w * scale_factor,
            grid.image_h * scale_factor,
            grid.overlap * scale_factor,
        )
        output = combine_grid(newgrid)
        return output

@dataclass(kw_only=True)
class ESRGANUpscalerCheckpoints(UpscalerCheckpoints):
    esrgan: Path

class ESRGANUpscaler(MultiUpscaler):
    def __init__(
        self,
        checkpoints: ESRGANUpscalerCheckpoints,
        device: torch.device,
        dtype: torch.dtype,
    ) -> None:
        super().__init__(checkpoints=checkpoints, device=device, dtype=dtype)
        self.esrgan = UpscalerESRGAN(checkpoints.esrgan, device=self.device, dtype=self.dtype)

    def to(self, device: torch.device, dtype: torch.dtype):
        self.esrgan.to(device=device, dtype=dtype)
        self.sd = self.sd.to(device=device, dtype=dtype)
        self.device = device
        self.dtype = dtype

    def pre_upscale(self, image: Image.Image, upscale_factor: float, **_: Any) -> Image.Image:
        image = self.esrgan.upscale_with_tiling(image)
        return super().pre_upscale(image=image, upscale_factor=upscale_factor / 4)

pillow_heif.register_heif_opener()
pillow_heif.register_avif_opener()

CHECKPOINTS = ESRGANUpscalerCheckpoints(
    unet=Path(
        hf_hub_download(
            repo_id="refiners/juggernaut.reborn.sd1_5.unet",
            filename="model.safetensors",
            revision="347d14c3c782c4959cc4d1bb1e336d19f7dda4d2",
        )
    ),
    clip_text_encoder=Path(
        hf_hub_download(
            repo_id="refiners/juggernaut.reborn.sd1_5.text_encoder",
            filename="model.safetensors",
            revision="744ad6a5c0437ec02ad826df9f6ede102bb27481",
        )
    ),
    lda=Path(
        hf_hub_download(
            repo_id="refiners/juggernaut.reborn.sd1_5.autoencoder",
            filename="model.safetensors",
            revision="3c1aae3fc3e03e4a2b7e0fa42b62ebb64f1a4c19",
        )
    ),
    controlnet_tile=Path(
        hf_hub_download(
            repo_id="refiners/controlnet.sd1_5.tile",
            filename="model.safetensors",
            revision="48ced6ff8bfa873a8976fa467c3629a240643387",
        )
    ),
    esrgan=Path(
        hf_hub_download(
            repo_id="philz1337x/upscaler",
            filename="4x-UltraSharp.pth",
            revision="011deacac8270114eb7d2eeff4fe6fa9a837be70",
        )
    ),
    negative_embedding=Path(
        hf_hub_download(
            repo_id="philz1337x/embeddings",
            filename="JuggernautNegative-neg.pt",
            revision="203caa7e9cc2bc225031a4021f6ab1ded283454a",
        )
    ),
    negative_embedding_key="string_to_param.*",
    loras={
        "more_details": Path(
            hf_hub_download(
                repo_id="philz1337x/loras",
                filename="more_details.safetensors",
                revision="a3802c0280c0d00c2ab18d37454a8744c44e474e",
            )
        ),
        "sdxl_render": Path(
            hf_hub_download(
                repo_id="philz1337x/loras",
                filename="SDXLrender_v2.0.safetensors",
                revision="a3802c0280c0d00c2ab18d37454a8744c44e474e",
            )
        )
    }
)

device = DEVICE = torch.device("cuda" if torch.cuda.is_available() else "cpu")
DTYPE = dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32

enhancer = ESRGANUpscaler(checkpoints=CHECKPOINTS, device=device, dtype=DTYPE)

# logging

warnings.filterwarnings("ignore")
root = logging.getLogger()
root.setLevel(logging.WARN)
handler = logging.StreamHandler(sys.stderr)
handler.setLevel(logging.WARN)
formatter = logging.Formatter('\n >>> [%(levelname)s] %(asctime)s %(name)s: %(message)s\n')
handler.setFormatter(formatter)
root.addHandler(handler)

# constant data

MAX_SEED = np.iinfo(np.int32).max

# precision data

seq=512
image_steps=40
img_accu=6.5

# ui data

css="".join(["""
input, textarea, input::placeholder, textarea::placeholder {
    text-align: center !important;
}
*, *::placeholder {
    font-family: Suez One !important;
}
h1,h2,h3,h4,h5,h6 {
    width: 100%;
    text-align: center;
}
footer {
    display: none !important;
}
.image-container {
    aspect-ratio: 1/1 !important;
    border: 2mm ridge black !important;
}
.dropdown-arrow {
    display: none !important;
}
*:has(>.btn) {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
}
.btn {
    display: flex;
}
"""])


# torch pipes

image_pipe = DiffusionPipeline.from_pretrained("ostris/Flex.1-alpha", torch_dtype=dtype).to(device)
image_pipe.enable_model_cpu_offload()

torch.cuda.empty_cache()

# functionality

@spaces.GPU(duration=300)
def hard_scaler(img):
    return upscaler(img)

@spaces.GPU(duration=150)
def easy_scaler(img):
    return upscaler(img)

def handle_upscaler(img):
    
    w, h = img.size
    if w*h > 2 * (10 ** 6):
        return hard_scaler(img)
    return easy_scaler(img)

def upscaler(
    input_image: Image.Image,
    prompt: str = "Accurate, Highly Detailed, Realistic, Best Quality, Hyper-Realistic, Super-Realistic, Natural, Reasonable, Logical.",
    negative_prompt: str = "Unreal, Exceptional, Irregular, Unusual, Blurry, Smoothed, Polished, Worst Quality, Worse Quality, Normal Quality, Painted, Movies Quality.",
    seed: int = random.randint(0, MAX_SEED),
    upscale_factor: int = 2,
    controlnet_scale: float = 0.6,
    controlnet_decay: float = 1.0,
    condition_scale: int = 6,
    tile_width: int = 112,
    tile_height: int = 144,
    denoise_strength: float = 0.35,
    num_inference_steps: int = 20,
    solver: str = "DDIM",
) -> Image.Image:

    log(f'CALL upscaler')

    manual_seed(seed)

    solver_type: type[Solver] = getattr(solvers, solver)

    log(f'DBG upscaler 1')

    enhanced_image = enhancer.upscale(
        image=input_image,
        prompt=prompt,
        negative_prompt=negative_prompt,
        upscale_factor=upscale_factor,
        controlnet_scale=controlnet_scale,
        controlnet_scale_decay=controlnet_decay,
        condition_scale=condition_scale,
        tile_size=(tile_height, tile_width),
        denoise_strength=denoise_strength,
        num_inference_steps=num_inference_steps,
        loras_scale={"more_details": 0.5, "sdxl_render": 1.0},
        solver_type=solver_type,
    )

    log(f'RET upscaler')

    return enhanced_image

def get_tensor_length(tensor):
    nums = list(tensor.size())
    ret = 1
    for num in nums:
        ret = ret * num
    return ret

def _summarize(text):
    log(f'CALL _summarize')
    prefix = "summarize: "
    toks = tokenizer.encode( prefix + text, return_tensors="pt", truncation=False)
    gen = model.generate(
        toks,
        length_penalty=0.1,
        num_beams=6,
        early_stopping=True,
        max_length=512
    )
    ret = tokenizer.decode(gen[0], skip_special_tokens=True)
    log(f'RET _summarize with ret as {ret}')
    return ret

def summarize(text, max_words=100):
    log(f'CALL summarize')
    
    words = text.split()
    words_length = len(words)

    if words_length >= 510:
        while words_length >= 510:
            words = text.split()
            sum = _summarize(
                " ".join(words[0:510])
            ) + " ".join(words[510:])
            if summ == text:
                return text
            text = summ
            words_length = len(text.split())
    
    while words_length > max_words:
        summ = _summarize(text)
        if summ == text:
            return text
        text = summ
        words_length = len(text.split())
        
    log(f'RET summarize with text as {text}')
    return text

def generate_random_string(length):
    characters = str(ascii_letters + digits)
    return ''.join(random.choice(characters) for _ in range(length))

def add_text_above_image(img,top_title=None,bottom_title=None):

    w, h = img.size
    
    draw = ImageDraw.Draw(img,mode="RGBA")

    labels_distance = 1/3

    if top_title:
        rows = len(top_title.split("\n"))
        textheight=min(math.ceil( w / 10 ), math.ceil( h / 5 ))
        font = ImageFont.truetype(r"Alef-Bold.ttf", textheight)
        textwidth = draw.textlength(top_title,font)
        x = math.ceil((w - textwidth) / 2)
        y = h - (textheight * rows / 2) - (h / 2)
        y = math.ceil(y - (h / 2 * labels_distance))
        draw.text((x, y), top_title, (255,255,255), font=font, spacing=2, stroke_width=math.ceil(textheight/20), stroke_fill=(0,0,0))

    if bottom_title:
        rows = len(bottom_title.split("\n"))
        textheight=min(math.ceil( w / 10 ), math.ceil( h / 5 ))
        font = ImageFont.truetype(r"Alef-Bold.ttf", textheight)
        textwidth = draw.textlength(bottom_title,font)
        x = math.ceil((w - textwidth) / 2)
        y = h - (textheight * rows / 2) - (h / 2)
        y = math.ceil(y + (h / 2 * labels_distance))
        draw.text((x, y), bottom_title, (0,0,0), font=font, spacing=2, stroke_width=math.ceil(textheight/20), stroke_fill=(255,255,255))
    
    return img

# Modified parts from https://github.com/nidhaloff/deep-translator:

google_translate_endpoint = "https://translate.google.com/m"
language_codes = {
    "afrikaans": "af",
    "albanian": "sq",
    "amharic": "am",
    "arabic": "ar",
    "armenian": "hy",
    "assamese": "as",
    "aymara": "ay",
    "azerbaijani": "az",
    "bambara": "bm",
    "basque": "eu",
    "belarusian": "be",
    "bengali": "bn",
    "bhojpuri": "bho",
    "bosnian": "bs",
    "bulgarian": "bg",
    "catalan": "ca",
    "cebuano": "ceb",
    "chichewa": "ny",
    "chinese (simplified)": "zh-CN",
    "chinese (traditional)": "zh-TW",
    "corsican": "co",
    "croatian": "hr",
    "czech": "cs",
    "danish": "da",
    "dhivehi": "dv",
    "dogri": "doi",
    "dutch": "nl",
    "english": "en",
    "esperanto": "eo",
    "estonian": "et",
    "ewe": "ee",
    "filipino": "tl",
    "finnish": "fi",
    "french": "fr",
    "frisian": "fy",
    "galician": "gl",
    "georgian": "ka",
    "german": "de",
    "greek": "el",
    "guarani": "gn",
    "gujarati": "gu",
    "haitian creole": "ht",
    "hausa": "ha",
    "hawaiian": "haw",
    "hebrew": "iw",
    "hindi": "hi",
    "hmong": "hmn",
    "hungarian": "hu",
    "icelandic": "is",
    "igbo": "ig",
    "ilocano": "ilo",
    "indonesian": "id",
    "irish": "ga",
    "italian": "it",
    "japanese": "ja",
    "javanese": "jw",
    "kannada": "kn",
    "kazakh": "kk",
    "khmer": "km",
    "kinyarwanda": "rw",
    "konkani": "gom",
    "korean": "ko",
    "krio": "kri",
    "kurdish (kurmanji)": "ku",
    "kurdish (sorani)": "ckb",
    "kyrgyz": "ky",
    "lao": "lo",
    "latin": "la",
    "latvian": "lv",
    "lingala": "ln",
    "lithuanian": "lt",
    "luganda": "lg",
    "luxembourgish": "lb",
    "macedonian": "mk",
    "maithili": "mai",
    "malagasy": "mg",
    "malay": "ms",
    "malayalam": "ml",
    "maltese": "mt",
    "maori": "mi",
    "marathi": "mr",
    "meiteilon (manipuri)": "mni-Mtei",
    "mizo": "lus",
    "mongolian": "mn",
    "myanmar": "my",
    "nepali": "ne",
    "norwegian": "no",
    "odia (oriya)": "or",
    "oromo": "om",
    "pashto": "ps",
    "persian": "fa",
    "polish": "pl",
    "portuguese": "pt",
    "punjabi": "pa",
    "quechua": "qu",
    "romanian": "ro",
    "russian": "ru",
    "samoan": "sm",
    "sanskrit": "sa",
    "scots gaelic": "gd",
    "sepedi": "nso",
    "serbian": "sr",
    "sesotho": "st",
    "shona": "sn",
    "sindhi": "sd",
    "sinhala": "si",
    "slovak": "sk",
    "slovenian": "sl",
    "somali": "so",
    "spanish": "es",
    "sundanese": "su",
    "swahili": "sw",
    "swedish": "sv",
    "tajik": "tg",
    "tamil": "ta",
    "tatar": "tt",
    "telugu": "te",
    "thai": "th",
    "tigrinya": "ti",
    "tsonga": "ts",
    "turkish": "tr",
    "turkmen": "tk",
    "twi": "ak",
    "ukrainian": "uk",
    "urdu": "ur",
    "uyghur": "ug",
    "uzbek": "uz",
    "vietnamese": "vi",
    "welsh": "cy",
    "xhosa": "xh",
    "yiddish": "yi",
    "yoruba": "yo",
    "zulu": "zu",
}

class BaseError(Exception):
    """
    base error structure class
    """

    def __init__(self, val, message):
        """
        @param val: actual value
        @param message: message shown to the user
        """
        self.val = val
        self.message = message
        super().__init__()

    def __str__(self):
        return "{} --> {}".format(self.val, self.message)


class LanguageNotSupportedException(BaseError):
    """
    exception thrown if the user uses a language
    that is not supported by the deep_translator
    """

    def __init__(
        self, val, message="There is no support for the chosen language"
    ):
        super().__init__(val, message)


class NotValidPayload(BaseError):
    """
    exception thrown if the user enters an invalid payload
    """

    def __init__(
        self,
        val,
        message="text must be a valid text with maximum 5000 character,"
        "otherwise it cannot be translated",
    ):
        super(NotValidPayload, self).__init__(val, message)


class InvalidSourceOrTargetLanguage(BaseError):
    """
    exception thrown if the user enters an invalid payload
    """

    def __init__(self, val, message="Invalid source or target language!"):
        super(InvalidSourceOrTargetLanguage, self).__init__(val, message)


class TranslationNotFound(BaseError):
    """
    exception thrown if no translation was found for the text provided by the user
    """

    def __init__(
        self,
        val,
        message="No translation was found using the current translator. Try another translator?",
    ):
        super(TranslationNotFound, self).__init__(val, message)


class ElementNotFoundInGetRequest(BaseError):
    """
    exception thrown if the html element was not found in the body parsed by beautifulsoup
    """

    def __init__(
        self, val, message="Required element was not found in the API response"
    ):
        super(ElementNotFoundInGetRequest, self).__init__(val, message)


class NotValidLength(BaseError):
    """
    exception thrown if the provided text exceed the length limit of the translator
    """

    def __init__(self, val, min_chars, max_chars):
        message = f"Text length need to be between {min_chars} and {max_chars} characters"
        super(NotValidLength, self).__init__(val, message)


class RequestError(Exception):
    """
    exception thrown if an error occurred during the request call, e.g a connection problem.
    """

    def __init__(
        self,
        message="Request exception can happen due to an api connection error. "
        "Please check your connection and try again",
    ):
        self.message = message

    def __str__(self):
        return self.message



class TooManyRequests(Exception):
    """
    exception thrown if an error occurred during the request call, e.g a connection problem.
    """

    def __init__(
        self,
        message="Server Error: You made too many requests to the server."
        "According to google, you are allowed to make 5 requests per second"
        "and up to 200k requests per day. You can wait and try again later or"
        "you can try the translate_batch function",
    ):
        self.message = message

    def __str__(self):
        return self.message

class ServerException(Exception):
    """
    Default YandexTranslate exception from the official website
    """

    errors = {
        400: "ERR_BAD_REQUEST",
        401: "ERR_KEY_INVALID",
        402: "ERR_KEY_BLOCKED",
        403: "ERR_DAILY_REQ_LIMIT_EXCEEDED",
        404: "ERR_DAILY_CHAR_LIMIT_EXCEEDED",
        413: "ERR_TEXT_TOO_LONG",
        429: "ERR_TOO_MANY_REQUESTS",
        422: "ERR_UNPROCESSABLE_TEXT",
        500: "ERR_INTERNAL_SERVER_ERROR",
        501: "ERR_LANG_NOT_SUPPORTED",
        503: "ERR_SERVICE_NOT_AVAIBLE",
    }

    def __init__(self, status_code, *args):
        message = self.errors.get(status_code, "API server error")
        super(ServerException, self).__init__(message, *args)

def is_empty(text: str) -> bool:
    return text == ""


def request_failed(status_code: int) -> bool:
    """Check if a request has failed or not.
    A request is considered successfull if the status code is in the 2** range.

    Args:
        status_code (int): status code of the request

    Returns:
        bool: indicates request failure
    """
    if status_code > 299 or status_code < 200:
        return True
    return False


def is_input_valid(
    text: str, min_chars: int = 0, max_chars: Optional[int] = None
) -> bool:
    """
    validate the target text to translate
    @param min_chars: min characters
    @param max_chars: max characters
    @param text: text to translate
    @return: bool
    """

    if not isinstance(text, str):
        raise NotValidPayload(text)
    if max_chars and (not min_chars <= len(text) < max_chars):
        raise NotValidLength(text, min_chars, max_chars)

    return True

class BaseTranslator(ABC):
    """
    Abstract class that serve as a base translator for other different translators
    """

    def __init__(
        self,
        base_url: str = None,
        languages: dict = language_codes,
        source: str = "auto",
        target: str = "en",
        payload_key: Optional[str] = None,
        element_tag: Optional[str] = None,
        element_query: Optional[dict] = None,
        **url_params,
    ):
        """
        @param source: source language to translate from
        @param target: target language to translate to
        """
        self._base_url = base_url
        self._languages = languages
        self._supported_languages = list(self._languages.keys())
        if not source:
            raise InvalidSourceOrTargetLanguage(source)
        if not target:
            raise InvalidSourceOrTargetLanguage(target)

        self._source, self._target = self._map_language_to_code(source, target)
        self._url_params = url_params
        self._element_tag = element_tag
        self._element_query = element_query
        self.payload_key = payload_key
        super().__init__()

    @property
    def source(self):
        return self._source

    @source.setter
    def source(self, lang):
        self._source = lang

    @property
    def target(self):
        return self._target

    @target.setter
    def target(self, lang):
        self._target = lang

    def _type(self):
        return self.__class__.__name__

    def _map_language_to_code(self, *languages):
        """
        map language to its corresponding code (abbreviation) if the language was passed
        by its full name by the user
        @param languages: list of languages
        @return: mapped value of the language or raise an exception if the language is
        not supported
        """
        for language in languages:
            if language in self._languages.values() or language == "auto":
                yield language
            elif language in self._languages.keys():
                yield self._languages[language]
            else:
                raise LanguageNotSupportedException(
                    language,
                    message=f"No support for the provided language.\n"
                    f"Please select on of the supported languages:\n"
                    f"{self._languages}",
                )

    def _same_source_target(self) -> bool:
        return self._source == self._target

    def get_supported_languages(
        self, as_dict: bool = False, **kwargs
    ) -> Union[list, dict]:
        """
        return the supported languages by the Google translator
        @param as_dict: if True, the languages will be returned as a dictionary
        mapping languages to their abbreviations
        @return: list or dict
        """
        return self._supported_languages if not as_dict else self._languages

    def is_language_supported(self, language: str, **kwargs) -> bool:
        """
        check if the language is supported by the translator
        @param language: a string for 1 language
        @return: bool or raise an Exception
        """
        if (
            language == "auto"
            or language in self._languages.keys()
            or language in self._languages.values()
        ):
            return True
        else:
            return False

    @abstractmethod
    def translate(self, text: str, **kwargs) -> str:
        """
        translate a text using a translator under the hood and return
        the translated text
        @param text: text to translate
        @param kwargs: additional arguments
        @return: str
        """
        return NotImplemented("You need to implement the translate method!")

    def _read_docx(self, f: str):
        import docx2txt

        return docx2txt.process(f)

    def _read_pdf(self, f: str):
        import pypdf

        reader = pypdf.PdfReader(f)
        page = reader.pages[0]
        return page.extract_text()

    def _translate_file(self, path: str, **kwargs) -> str:
        """
        translate directly from file
        @param path: path to the target file
        @type path: str
        @param kwargs: additional args
        @return: str
        """
        if not isinstance(path, Path):
            path = Path(path)

        if not path.exists():
            print("Path to the file is wrong!")
            exit(1)

        ext = path.suffix

        if ext == ".docx":
            text = self._read_docx(f=str(path))

        elif ext == ".pdf":
            text = self._read_pdf(f=str(path))
        else:
            with open(path, "r", encoding="utf-8") as f:
                text = f.read().strip()

        return self.translate(text)

    def _translate_batch(self, batch: List[str], **kwargs) -> List[str]:
        """
        translate a list of texts
        @param batch: list of texts you want to translate
        @return: list of translations
        """
        if not batch:
            raise Exception("Enter your text list that you want to translate")
        arr = []
        for i, text in enumerate(batch):
            translated = self.translate(text, **kwargs)
            arr.append(translated)
        return arr

class GoogleTranslator(BaseTranslator):
    """
    class that wraps functions, which use Google Translate under the hood to translate text(s)
    """

    def __init__(
        self,
        source: str = "auto",
        target: str = "en",
        proxies: Optional[dict] = None,
        **kwargs
    ):
        """
        @param source: source language to translate from
        @param target: target language to translate to
        """
        self.proxies = proxies
        super().__init__(
            base_url=google_translate_endpoint,
            source=source,
            target=target,
            element_tag="div",
            element_query={"class": "t0"},
            payload_key="q",  # key of text in the url
            **kwargs
        )

        self._alt_element_query = {"class": "result-container"}

    def translate(self, text: str, **kwargs) -> str:
        """
        function to translate a text
        @param text: desired text to translate
        @return: str: translated text
        """
        if is_input_valid(text, max_chars=1000):
            text = text.strip()
            if self._same_source_target() or is_empty(text):
                return text
            self._url_params["tl"] = self._target
            self._url_params["sl"] = self._source

            if self.payload_key:
                self._url_params[self.payload_key] = text

            response = requests.get(
                self._base_url, params=self._url_params, proxies=self.proxies
            )
            if response.status_code == 429:
                raise TooManyRequests()

            if request_failed(status_code=response.status_code):
                raise RequestError()

            soup = BeautifulSoup(response.text, "html.parser")

            element = soup.find(self._element_tag, self._element_query)
            response.close()

            if not element:
                element = soup.find(self._element_tag, self._alt_element_query)
                if not element:
                    raise TranslationNotFound(text)
            if element.get_text(strip=True) == text.strip():
                to_translate_alpha = "".join(
                    ch for ch in text.strip() if ch.isalnum()
                )
                translated_alpha = "".join(
                    ch for ch in element.get_text(strip=True) if ch.isalnum()
                )
                if (
                    to_translate_alpha
                    and translated_alpha
                    and to_translate_alpha == translated_alpha
                ):
                    self._url_params["tl"] = self._target
                    if "hl" not in self._url_params:
                        return text.strip()
                    del self._url_params["hl"]
                    return self.translate(text)

            else:
                return element.get_text(strip=True)

    def translate_file(self, path: str, **kwargs) -> str:
        """
        translate directly from file
        @param path: path to the target file
        @type path: str
        @param kwargs: additional args
        @return: str
        """
        return self._translate_file(path, **kwargs)

    def translate_batch(self, batch: List[str], **kwargs) -> List[str]:
        """
        translate a list of texts
        @param batch: list of texts you want to translate
        @return: list of translations
        """
        return self._translate_batch(batch, **kwargs)

# End of "Modified parts from https://github.com/nidhaloff/deep-translator"

def translate(txt,to_lang="en",from_lang="auto"):
    log(f'CALL translate')
    if len(txt) == 0:
        print("Translated text is empty. Skipping translation...")
        return txt.strip().lower()
    if from_lang == to_lang or get_language(txt) == to_lang:
        print("Same languages. Skipping translation...")
        return txt.strip().lower()
    translator = GoogleTranslator(from_lang=from_lang,to_lang=to_lang)
    translation = ""
    if len(txt) > 1000:
        words = txt.split()
        while len(words) > 0:
            chunk = ""
            while len(words) > 0 and len(chunk) < 1000:
                chunk = chunk + " " + words[0]
                words = words[1:]
            if len(chunk) > 1000:
                _words = chunk.split()
                words = [_words[-1], *words]
                chunk = " ".join(_words[:-1])
            translation = translation + " " + translator.translate(chunk)
    else:
        translation = translator.translate(txt)
    translation = translation.strip()
    log(f'RET translate with translation as {translation}')
    return translation.lower()

def handle_generation(h,w,d):

    log(f'CALL handle_generate')

    difficulty_points = 0

    toks_len = get_tensor_length(tokenizer.encode( d, return_tensors="pt", truncation=False))
    if toks_len > 500:
        difficulty_points + 2
    elif toks_len > 50:
        difficulty_points + 1

    pxs = h*w
    if pxs > 2 * (10 ** 6):
        difficulty_points + 2
    elif pxs > 1 * (10 ** 6):
        difficulty_points + 1

    if difficulty_points < 2:
        return easy_generation(h,w,d)
    elif difficulty_points < 4:
        return balanced_generation(h,w,d)
    else:
        return hard_generation(h,w,d)

@spaces.GPU(duration=150)
def easy_generation(h,w,d):
    return generation(h,w,d)

@spaces.GPU(duration=210)
def balanced_generation(h,w,d):
    return generation(h,w,d)

@spaces.GPU(duration=270)
def hard_generation(h,w,d):
    return generation(h,w,d)

def generation(h,w,d):
    
    if len(d) > 0:
        d = re.sub(r",( ){1,}",". ",d)
        d_lines = re.split(r"([\n]){1,}", d)
        
        for line_index in range(len(d_lines)):
            d_lines[line_index] = d_lines[line_index].strip()
            if d_lines[line_index] != "" and re.sub(r'[\.]$', '', d_lines[line_index]) == d_lines[line_index]:
                d_lines[line_index] = d_lines[line_index] + "."
        d = " ".join(d_lines)
    
        d = re.sub(r"([ \t]){1,}", " ", d).lower().strip()
        d = d if d == "" else summarize(translate(d),max_words=50)
        d = re.sub(r"([ \t]){1,}", " ", d)
        d = re.sub(r"(\. \.)", ".", d)

    neg = f"Textual, Text, Signs, Labels, Titles, Unreal, Exceptional, Irregular, Unusual, Blurry, Smoothed, Polished, Worst Quality, Worse Quality, Painted, Movies Quality."
    q = "\""
    pos = f'Accurate, Detailed, Realistic.{ "" if d == "" else " " + d }'

    print(f"""
        Positive: {pos}

        Negative: {neg}
    """)

    img = image_pipe(
        prompt=pos,
        negative_prompt=neg,
        height=h,
        width=w,
        output_type="pil",
        guidance_scale=img_accu,
        num_images_per_prompt=1,
        num_inference_steps=image_steps,
        max_sequence_length=seq,
        generator=torch.Generator(device).manual_seed(random.randint(0, MAX_SEED))
    ).images[0]
    
    return img
   
# entry

if __name__ == "__main__":
    with gr.Blocks(theme=gr.themes.Citrus(),css=css) as demo:
        gr.Markdown(f"""
            # Text-to-Image generator
        """)
        gr.Markdown(f"""
            ### Realistic. Upscalable. Multilingual.
        """)
        
        with gr.Row():
            with gr.Column(scale=2):
                
                height = gr.Slider(
                    label="Height (px)",
                    minimum=512,
                    maximum=1536,
                    step=16,
                    value=1024,
                )

                width = gr.Slider(
                    label="Width (px)",
                    minimum=512,
                    maximum=1536,
                    step=16,
                    value=1024,
                )

                run = gr.Button("Generate",elem_classes="btn")

                top = gr.Textbox(
                    placeholder="Top title",
                    value="",
                    container=False,
                    max_lines=1
                )
                bottom = gr.Textbox(
                    placeholder="Bottom title",
                    value="",
                    container=False,
                    max_lines=1
                )

                data = gr.Textbox(
                    placeholder="Input data",
                    value="",
                    container=False,
                    max_lines=100
                )

            with gr.Column():
                cover = gr.Image(interactive=False,container=False,elem_classes="image-container", label="Result", show_label=True, type='pil', show_share_button=False)
                upscale_now = gr.Button("Upscale x2",elem_classes="btn")
                add_titles = gr.Button("Add title(s)",elem_classes="btn")

        gr.on(
            triggers=[run.click],
            fn=handle_generation,
            inputs=[height,width,data],
            outputs=[cover]
        )
        upscale_now.click(
            fn=handle_upscaler,
            inputs=[cover],
            outputs=[cover]
        )
        add_titles.click(
            fn=add_text_above_image,
            inputs=[cover,top,bottom],
            outputs=[cover]
        )

    demo.queue().launch()