from asyncio import create_subprocess_shell, gather, sleep
from pathlib import Path
from random import choice
from subprocess import CalledProcessError, PIPE
from typing import Any, List
from uuid import uuid4

from fastapi import FastAPI, HTTPException
from fastapi.responses import PlainTextResponse
from httpx import AsyncClient, HTTPStatusError, RequestError
from pydantic import BaseModel, HttpUrl
from uvicorn import run as uvicorn_run

oxipng_bin = Path(__file__).parent / 'oxipng'
oxipng_bin.chmod(0o755)

tokens = [
    # мне в общем-то все равно на эти токены
    '7e0ea3da6a73d77003c1abba7f0ea13c',
    'bc2e68b5918e5bb59ebca6c05d73daf9',
    'fecbfbe0938bcd1df27b7a9be1702cc9',
    '04e9981d4d0981964cb4c9753173244d',
    'dee75b07981c7aa211628ea7c7cbc03d',
]


async def download_png(url: str, client: AsyncClient, retries: int = 5) -> Path:
    for attempt in range(retries):
        try:
            response = await client.get(url, timeout=30.0)
            response.raise_for_status()
            file_path = Path(f'{uuid4()}.png')
            file_path.write_bytes(response.content)
            return file_path
        except (HTTPStatusError, RequestError) as e:
            if attempt < retries - 1:
                await sleep(2 ** attempt)
            else:
                raise e


async def download_pngs(urls: str | list[str]) -> list[Any]:
    urls = [urls] if isinstance(urls, str) else urls
    async with AsyncClient() as client:
        tasks = [download_png(url, client) for url in urls]
        return list(await gather(*tasks))


async def optimize_png(image_path: Path, retries: int = 3) -> None:
    command = f'{oxipng_bin.resolve()} --opt 2 --strip safe --out {image_path} {image_path}'
    for attempt in range(retries):
        try:
            process = await create_subprocess_shell(command, stdout=PIPE, stderr=PIPE)
            stdout, stderr = await process.communicate()
            if process.returncode == 0:
                return
            else:
                raise CalledProcessError(process.returncode, command, output=stdout, stderr=stderr)
        except CalledProcessError as e:
            if attempt < retries - 1:
                await sleep(2 ** attempt)
            else:
                raise e


async def optimize_pngs(image_paths: list[str | Path] | str | Path) -> None:
    image_paths = [Path(image_file) for image_file in ([image_paths] if not isinstance(image_paths, list) else image_paths)]
    tasks = [optimize_png(image_path) for image_path in image_paths]
    await gather(*tasks)


async def telegraph_upload_png(file_path: str | Path) -> str | None:
    file_path = Path(file_path)
    if not file_path.is_file() or file_path.stat().st_size > 5 * 1024 * 1024:
        return None
    url = 'https://telegra.ph/upload'
    headers = {
        'authority': url.rsplit('/')[2],
        'accept': 'application/json, text/javascript, */*; q=0.01',
        'origin': url.rsplit('/', 1)[0],
        'referer': url.rsplit('/', 1)[0],
        'x-requested-with': 'XMLHttpRequest',
    }
    async with AsyncClient() as client:
        try:
            response = await client.post(url, headers=headers, files={'file': ('blob', file_path.read_bytes(), 'image/png')})
            response.raise_for_status()
            result = response.json()
        except:
            return None
    if response.is_success and 'error' not in result:
        link = result[0]['src']
        return url.rsplit('/', 1)[0] + link
    else:
        return None


async def upload_image_to_imgbb(file_path: Path) -> str | None:
    url = f'https://api.imgbb.com/1/upload?key={choice(tokens)}'
    try:
        with file_path.open('rb') as file:
            files = {'image': (file_path.name, file, 'image/png')}
            data = {}
            async with AsyncClient() as client:
                response = await client.post(url, files=files, data=data, timeout=30)
                response.raise_for_status()
                json = response.json()
                if json.get('success'):
                    return json['data']['url']
    except:
        return None


async def upload_image(file_path: Path | str) -> str | None:
    file_path = Path(file_path)
    return await telegraph_upload_png(file_path) or await upload_image_to_imgbb(file_path)


async def optimize_and_upload(images_urls: list[str] | str) -> list[str]:
    images_urls = [images_urls] if isinstance(images_urls, str) else images_urls
    images_paths = await download_pngs(images_urls)
    await optimize_pngs(images_paths)
    new_images_urls = []
    for image_path in images_paths:
        new_url = await upload_image(image_path)
        if new_url:
            new_images_urls.append(new_url)
        image_path.unlink(missing_ok=True)
    return new_images_urls


app = FastAPI()


class ImageURLs(BaseModel):
    urls: List[HttpUrl]


@app.get('/')
async def read_root():
    return PlainTextResponse('ну пролапс, ну и что', status_code=200)


@app.post('/pngopt_by_urls/')
async def optimize_images_endpoint(image_urls: ImageURLs):
    try:
        optimized_urls = await optimize_and_upload([str(url) for url in image_urls.urls])
        return {"optimized_urls": optimized_urls}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))


if __name__ == "__main__":
    uvicorn_run(app, host='0.0.0.0', port=7860, timeout_keep_alive=90)