#!/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.dev20230223+cpu.torch1.10.0-cp36-cp36m-linux_x86_64.whl
        """
        self.full_name = full_name
        #  pattern = r"k2-(\d)\.(\d+)(\.(\d+))?\.dev(\d{8})+cpu\.torch(\d\.\d+)"
        pattern = (
            r"k2-(\d)\.(\d)+((\.)(\d))?\.dev(\d{8})\+cpu\.torch(\d\.\d+\.\d)-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.torch_version = m.group(7)
        self.py_version = int(m.group(8))
        self.url = url

    def __str__(self):
        return self.url

    def __repr__(self):
        return self.url


def sort_by_wheel(x: Wheel):
    torch_major, torch_minor, torch_patch = x.torch_version.split(".")
    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.py_version,
    )


def main():
    wheels = get_all_files("cpu", suffix="*.whl")
    wheels += get_all_files("windows-cpu", suffix="*.whl")
    wheels += get_all_files("macos", 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/cpu.html", "w") as f:
        for w in wheels:
            f.write(f'<a href="{w.url}">{w.full_name}</a><br/>\n')


if __name__ == "__main__":
    main()