#!/usr/bin/env python3
import os
import re
from pathlib import Path

from update_readme import generate_url, get_all_files


def get_doc_dir():
    k2_dir = os.getenv("K2_DIR")
    if k2_dir is None:
        raise ValueError("Please set the environment variable k2_dir")

    return Path(k2_dir) / "docs"


class Wheel:
    def __init__(self, full_name: str, url: str):
        """
        Args:
          full_name:
            Example: k2-1.23.4.dev20230224+cuda10.1.torch1.6.0-cp36-cp36m-linux_x86_64.whl
            k2-1.24.4.dev20240301+cuda12.1.torch2.3.0.dev20240229-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
        """
        self.full_name = str(full_name)
        pattern = r"k2-(\d)\.(\d)+((\.)(\d))?\.dev(\d{8})\+cuda(\d+)\.(\d+)\.torch(\d\.\d+\.\d(\.dev\d{8})?)-cp(\d+)"
        m = re.search(pattern, full_name)

        self.k2_major = int(m.group(1))
        self.k2_minor = int(m.group(2))
        self.k2_patch = int(m.group(5))
        self.k2_date = int(m.group(6))
        self.cuda_major_version = int(m.group(7))
        self.cuda_minor_version = int(m.group(8))
        self.torch_version = m.group(9)
        self.py_version = int(m.group(11))
        self.url = url


def sort_by_wheel(x: Wheel):
    torch_major, torch_minor, torch_patch = x.torch_version.split(".")[:3]
    torch_major = int(torch_major)
    torch_minor = int(torch_minor)
    torch_patch = int(torch_patch)
    return (
        x.k2_major,
        x.k2_minor,
        x.k2_patch,
        x.k2_date,
        torch_major,
        torch_minor,
        torch_patch,
        x.cuda_major_version,
        x.cuda_minor_version,
        x.py_version,
    )


def main():
    wheels = get_all_files("cuda", suffix="*.whl")
    wheels += get_all_files("ubuntu-cuda", suffix="*.whl")
    urls = generate_url(wheels)

    wheels = []
    for url in urls:
        full_name = url.rsplit("/", maxsplit=1)[1]
        wheels.append(Wheel(full_name, url))

    wheels.sort(reverse=True, key=sort_by_wheel)
    d = get_doc_dir()
    with open(d / "source/cuda.html", "w") as f:
        for w in wheels:
            f.write(f'<a href="{w.url}">{w.full_name}</a><br/>\n')
    with open(d / "source/cuda-cn.html", "w") as f:
        for w in wheels:
            url = w.url.replace("https://huggingface.co", "https://hf-mirror.com")
            f.write(f'<a href="{url}">{w.full_name}</a><br/>\n')


if __name__ == "__main__":
    main()