import asyncio
from typing import Awaitable, Callable, List, Optional, TypeVar

import gradio as gr
from tqdm.asyncio import tqdm as tqdm_async

from graphgen.utils.log import logger

T = TypeVar("T")
R = TypeVar("R")


async def run_concurrent(
    coro_fn: Callable[[T], Awaitable[R]],
    items: List[T],
    *,
    desc: str = "processing",
    unit: str = "item",
    progress_bar: Optional[gr.Progress] = None,
) -> List[R]:
    tasks = [asyncio.create_task(coro_fn(it)) for it in items]

    completed_count = 0
    results = []

    pbar = tqdm_async(total=len(items), desc=desc, unit=unit)

    if progress_bar is not None:
        progress_bar(0.0, desc=f"{desc} (0/{len(items)})")

    for future in asyncio.as_completed(tasks):
        try:
            result = await future
            results.append(result)
        except Exception as e:  # pylint: disable=broad-except
            logger.exception("Task failed: %s", e)
            # even if failed, record it to keep results consistent with tasks
            results.append(e)

        completed_count += 1
        pbar.update(1)

        if progress_bar is not None:
            progress = completed_count / len(items)
            progress_bar(progress, desc=f"{desc} ({completed_count}/{len(items)})")

    pbar.close()

    if progress_bar is not None:
        progress_bar(1.0, desc=f"{desc} (completed)")

    # filter out exceptions
    results = [res for res in results if not isinstance(res, Exception)]

    return results