import glob
import os
import subprocess

import torch
from setuptools import find_packages, setup
from torch.utils.cpp_extension import CUDA_HOME, CppExtension, CUDAExtension

version = "v1.5"
package_name = "gdino"
cwd = os.path.dirname(os.path.abspath(__file__))

sha = "Unknown"
try:
    sha = subprocess.check_output(["git", "rev-parse", "HEAD"],
                                  cwd=cwd).decode("ascii").strip()
except Exception:
    pass


def write_version_file():
    version_path = os.path.join(cwd, "gdino/", "version.py")
    with open(version_path, "w") as f:
        f.write(f"__version__ = '{version}'\n")
        # f.write(f"git_version = {repr(sha)}\n")


def parse_requirements(fname="requirements.txt", with_version=True):
    """Parse the package dependencies listed in a requirements file but strips
    specific versioning information.

    Args:
        fname (str): path to requirements file
        with_version (bool, default=False): if True include version specs

    Returns:
        List[str]: list of requirements items

    CommandLine:
        python -c "import setup; print(setup.parse_requirements())"
    """
    import re
    import sys
    from os.path import exists

    require_fpath = fname

    def parse_line(line):
        """Parse information from a line in a requirements text file."""
        if line.startswith("-r "):
            # Allow specifying requirements in other files
            target = line.split(" ")[1]
            for info in parse_require_file(target):
                yield info
        else:
            info = {"line": line}
            if line.startswith("-e "):
                info["package"] = line.split("#egg=")[1]
            elif "@git+" in line:
                info["package"] = line
            else:
                # Remove versioning from the package
                pat = "(" + "|".join([">=", "==", ">"]) + ")"
                parts = re.split(pat, line, maxsplit=1)
                parts = [p.strip() for p in parts]

                info["package"] = parts[0]
                if len(parts) > 1:
                    op, rest = parts[1:]
                    if ";" in rest:
                        # Handle platform specific dependencies
                        # http://setuptools.readthedocs.io/en/latest/setuptools.html#declaring-platform-specific-dependencies
                        version, platform_deps = map(str.strip,
                                                     rest.split(";"))
                        info["platform_deps"] = platform_deps
                    else:
                        version = rest  # NOQA
                    info["version"] = (op, version)
            yield info

    def parse_require_file(fpath):
        with open(fpath, "r") as f:
            for line in f.readlines():
                line = line.strip()
                if line and not line.startswith("#"):
                    for info in parse_line(line):
                        yield info

    def gen_packages_items():
        if exists(require_fpath):
            for info in parse_require_file(require_fpath):
                parts = [info["package"]]
                if with_version and "version" in info:
                    parts.extend(info["version"])
                if not sys.version.startswith("3.4"):
                    # apparently package_deps are broken in 3.4
                    platform_deps = info.get("platform_deps")
                    if platform_deps is not None:
                        parts.append(";" + platform_deps)
                item = "".join(parts)
                yield item

    packages = list(gen_packages_items())
    return packages


if __name__ == "__main__":
    print(f"Building wheel {package_name}-{version}")

    with open("LICENSE", "r", encoding="utf-8") as f:
        license = f.read()

    write_version_file()

    setup(
        name="gdino",
        version="v1.5",
        author="International Digital Economy Academy, CVR",
        url="https://github.com/IDEA-Research/Grounding-DINO-1.5-API",
        description="Grounding DINO 1.5 API wrapper.",
        license=license,
        install_requires=parse_requirements("requirements.txt"),
        packages=find_packages(exclude=("tests", )),
        ext_modules=None,
        cmdclass={"build_ext": torch.utils.cpp_extension.BuildExtension},
    )